<SEC-DOCUMENT>0001537435-25-000083.txt : 20250716
<SEC-HEADER>0001537435-25-000083.hdr.sgml : 20250716
<ACCEPTANCE-DATETIME>20250716162708
ACCESSION NUMBER:		0001537435-25-000083
CONFORMED SUBMISSION TYPE:	S-1/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250716
DATE AS OF CHANGE:		20250716

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TECOGEN INC.
		CENTRAL INDEX KEY:			0001537435
		STANDARD INDUSTRIAL CLASSIFICATION:	AIR COND & WARM AIR HEATING EQUIP & COMM & INDL REFRIG EQUIP [3585]
		ORGANIZATION NAME:           	06 Technology
		EIN:				043536131
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-1/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-288668
		FILM NUMBER:		251127732

	BUSINESS ADDRESS:	
		STREET 1:		76 TREBLE COVE ROAD
		STREET 2:		BLDG. 1
		CITY:			NORTH BILLERICA
		STATE:			MA
		ZIP:			01862
		BUSINESS PHONE:		781-466-6400

	MAIL ADDRESS:	
		STREET 1:		76 TREBLE COVE ROAD
		STREET 2:		BLDG. 1
		CITY:			NORTH BILLERICA
		STATE:			MA
		ZIP:			01862

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TECOGEN INC
		DATE OF NAME CHANGE:	20111215
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-1/A
<SEQUENCE>1
<FILENAME>pre-effectiveamendmentno2.htm
<DESCRIPTION>S-1/A
<TEXT>
<html><head>
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<title>Document</title></head><body><div id="i010ecf7ef3ca4478ba53941aaad61d1d_1"></div><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">As filed with the United States Securities and Exchange Commission on&#160;July 16, 2025.</font></div><div style="text-align:justify"><font><br></font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="border-bottom:1.5pt solid #000000;padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">Registration No. 333-288668</font></td></tr></table></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font><br></font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">UNITED STATES</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">SECURITIES AND EXCHANGE COMMISSION</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">WASHINGTON, D.C.  20549</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:120%">_______________</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font><br></font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">AMENDMENT NO. 2</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">TO</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">FORM S-1</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">REGISTRATION STATEMENT</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">UNDER</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">THE SECURITIES ACT OF 1933</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font><br></font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%;text-decoration:underline">TECOGEN INC.</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">(Exact name of registrant as specified in its charter)</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center"><font><br></font></div><div style="padding-left:2.25pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.519%"><tr><td style="width:1.0%"></td><td style="width:32.233%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:32.233%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:32.234%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%;text-decoration:underline">Delaware</font></div><div style="padding-left:9.74pt;padding-right:9.74pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">(State or other jurisdiction of incorporation or organization)</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:9.74pt;padding-right:9.74pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%;text-decoration:underline">3585</font></div><div style="padding-left:9.74pt;padding-right:9.74pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">(Primary Standard Industrial</font></div><div style="padding-left:9.74pt;padding-right:9.74pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Classification Code Number)</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%;text-decoration:underline">04-3536131</font></div><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">(IRS Employer</font></div><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Identification Number)</font></div></td></tr></table></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">76 Treble Cove Road</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Building 1</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">North Billerica, MA 01862</font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%;text-decoration:underline">781.466.6400</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center;text-indent:4.8pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">(Address, including zip code, and telephone number, including area code, </font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center;text-indent:4.8pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">of the registrant&#8217;s principal executive offices)</font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center;text-indent:4.8pt"><font><br></font></div><div style="padding-left:76.25pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:67.307%"><tr><td style="width:1.0%"></td><td style="width:98.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">John K. Whiting, IV, Esq.</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">General Counsel</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Tecogen Inc.</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">76 Treble Cove Road</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Building 1</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">North Billerica, Massachusetts 01862</font></div><div style="padding-left:9.74pt;padding-right:9.74pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%;text-decoration:underline">Telephone&#58; 781.466.6016</font></div><div style="padding-left:9.74pt;padding-right:9.74pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">(Name, address, including zip code, and telephone number, including area code, of agent for service)</font></div></td></tr></table></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center;text-indent:4.8pt"><font><br></font></div><div style="padding-left:8.1pt;padding-right:8.1pt;text-align:center;text-indent:4.8pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-style:italic;font-weight:400;line-height:120%">Copies of Communications to&#58;</font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:48.820%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.980%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Neil R.E. Carr, Esq.</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Somertons, PLLC</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">1025 Connecticut Avenue, N.W.</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Suite 1000</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Washington, D.C.  20036</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Telephone&#58; 202.459.4651</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">M. Ali Panjwani, Esq.</font></div><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Pryor Cashman LLP</font></div><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">7 Times Square</font></div><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">40</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:5.85pt;font-weight:700;line-height:120%;position:relative;top:-3.15pt;vertical-align:baseline">th</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%"> Floor</font></div><div style="padding-left:10.87pt;padding-right:10.87pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">New York, NY  10035</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Telephone&#58; 212.326.0820</font></div></td></tr></table></div><div style="padding-right:13.95pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Approximate date of commencement of proposed sale to the public&#58; </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">As soon as practicable after this registration statement becomes effective. </font></div><div style="padding-right:13.95pt;text-align:justify"><font><br></font></div><div style="padding-right:13.95pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box. </font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font></div><div style="padding-right:13.95pt;text-align:justify"><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="padding-right:13.95pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  &#160;</font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font></div><div style="padding-right:13.95pt;text-align:justify"><font><br></font></div><div style="padding-right:13.95pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  &#160;</font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font></div><div style="padding-right:13.95pt;text-align:justify"><font><br></font></div><div style="padding-right:13.95pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering&#58; </font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company.  See the definitions of &#8220;large accelerated filer,&#8221; &#8220;accelerated filer,&#8221; &#8220;smaller reporting company,&#8221; and &#8220;emerging growth company&#8221; in Rule 12b-2 of the Exchange Act.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Large accelerated filer </font><font style="background-color:#ffffff;color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">&#9744;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Accelerated filer </font><font style="background-color:#ffffff;color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:120%">&#9744;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Non-accelerated filer </font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font><font style="color:#000000;font-family:'Courier New',monospace;font-size:9pt;font-weight:400;line-height:120%"> </font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Smaller reporting company </font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font><font style="color:#000000;font-family:'Courier New',monospace;font-size:9pt;font-weight:400;line-height:120%"> &#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Emerging growth company </font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"> </font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  </font><font style="font-family:'Wingdings',sans-serif;font-size:9pt;font-weight:400;line-height:120%"></font></div><div><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%;text-decoration:underline">________________________________________________________________________________________________________</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.</font></div><div style="text-align:justify"><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font><br></font></div></div></div><div id="i010ecf7ef3ca4478ba53941aaad61d1d_4"></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">EXPLANATORY NOTE</font></div><div style="text-align:center"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">This Amendment No. 1 </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">(&#8220;Amendment No. 1&#8221;) </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">to the Registration Statement on Form S-1 (File No. 333-288668) </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">(&#8220;Registration Statement&#8221;)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> of Tecogen Inc, a Delaware corporation </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">(&#8220;Company&#8221;)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">, is being filed for the sole purpose of amending the signature page to the Registration Statement to include the Company&#8217;s Principal Accounting Officer.  This Amendment No. 1 includes Part II but omits the prospectus included in the initial filing of the Registration Statement which remains unchanged.</font></div><div style="text-align:center"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">PART II</font></div><div style="text-align:center;text-indent:36pt"><font><br></font></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</font></div><div style="text-align:justify;text-indent:36pt"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item 13.  &#160;&#160;&#160;&#160;Other Expenses of Issuance and Distribution</font></div><div style="text-align:justify;text-indent:36pt"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The following table sets forth the estimated expenses to be incurred by us, other than underwriting discounts and commissions, in connection with the registration of the securities the subject of this registration statement. All such expenses are estimates, other than the SEC registration fee and Financial Industry Regulatory Authority Inc. </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">(&#8220;FINRA&#8221;)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> filing fee&#58;</font></div><div style="text-align:justify;text-indent:36pt"><font><br></font></div><div style="padding-left:25.75pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:94.391%"><tr><td style="width:1.0%"></td><td style="width:54.927%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:16.726%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:25.047%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">SEC Registration Fee</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;$        3,521 </font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">NYSE American Listing Fee</font></div></td><td colspan="3" style="padding:0 1pt"><div style="padding-left:3.37pt;padding-right:3.37pt"><font><br></font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">-- </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:6pt;font-weight:400;line-height:120%">(1)</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">FINRA Filing Fee</font></div></td><td colspan="3" style="padding:0 1pt"><div style="padding-left:3.37pt;padding-right:3.37pt"><font><br></font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">3,500</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Accounting Fees and Expenses</font></div></td><td colspan="3" style="padding:0 1pt"><div style="padding-left:3.37pt;padding-right:3.37pt"><font><br></font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">85,000</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Registrant&#8217;s Legal Fees and Expenses</font></div></td><td colspan="3" style="padding:0 1pt"><div style="padding-left:3.37pt;padding-right:3.37pt"><font><br></font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">125,000</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Printing and Engraving Expenses</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:23.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#160;</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">--</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Miscellaneous Expenses</font></div></td><td colspan="3" style="padding:0 1pt"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font><br></font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt;text-align:right"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">--</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:3.37pt;padding-right:3.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Estimated Total</font></div><div style="padding-left:3.37pt;padding-right:23.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#160;</font></div></td><td colspan="3" style="padding:0 1pt"><div style="padding-left:3.37pt;padding-right:4.27pt;text-align:right"><font><br></font></div></td><td style="padding:2px 0 2px 1pt;text-align:left;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">$</font></td><td colspan="2" style="padding:2px 4.37pt 2px 0;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">217,021.00</font></td></tr></table></div><div style="padding-left:54pt;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">(1)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;padding-left:7.52pt">Previously paid in connection with initial listing of shares on NYSE American.</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item 14.  &#160;&#160;&#160;&#160;Indemnification of Directors and Officers</font></div><div style="text-align:justify;text-indent:36pt"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Section 102 of the Delaware General Corporation Law </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">(&#8220;DGCL&#8221;)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> allows a corporation to eliminate the personal liability of directors of a corporation to the corporation or its stockholders for monetary damages for a breach of fiduciary duty as a director, except where the director breached his duty of loyalty, failed to act in good faith, engaged in intentional misconduct or knowingly violated a law, authorized the payment of a dividend or approved a stock repurchase in violation of Delaware corporate law or obtained an improper personal benefit. We have included such a provision in our Amended and Restated Certificate of Incorporation.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Section 145 of  DGCL provides that a corporation has the power to indemnify a director, officer, employee or agent of the corporation and certain other persons serving at the request of the corporation in related capacities against amounts paid and expenses incurred in connection with an action or proceeding to which he is or is threatened to be made a party by reason of such position, if such person shall have acted in good faith and in a manner he reasonably believed to be in or not opposed to the best interests of the corporation, and, in any criminal proceeding, if such person had no reasonable cause to believe his conduct was unlawful&#59; provided that, in the case of actions brought by or in the right of the corporation, no indemnification shall be made with respect to any matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the adjudicating court determines that such indemnification is proper under the circumstances.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">Our charter includes a provision that eliminates the personal liability of our directors for monetary damages for breach of fiduciary duty as a director, except for liability&#58;</font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div><font><br></font></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">&#8226;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%;padding-left:14.5pt">for any breach of the director's duty of loyalty to us or our stockholders&#59;</font></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">&#8226;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%;padding-left:14.5pt">for acts or omissions not in good faith or that involve intentional misconduct or a knowing violation of law&#59;</font></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">&#8226;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%;padding-left:14.5pt">under section 174 of the DGCL regarding unlawful dividends and stock purchases&#59; or</font></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">&#8226;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%;padding-left:14.5pt">for any transaction from which the director derived an improper personal benefit.</font></div><div style="text-align:justify;text-indent:36pt"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">Our charter also provides that&#58;</font></div><div><font><br></font></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">&#8226;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%;padding-left:14.5pt">we may, to the extent authorized from time to time by our board of directors, indemnify our other employees and agents to the same extent that we indemnified our officers and directors&#59; and</font></div><div style="padding-left:36pt;text-align:justify"><font><br></font></div><div style="padding-left:36pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%">&#8226;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:139%;padding-left:14.5pt">in the event we do not assume the defense in a legal proceeding, we must advance expenses, as incurred, to our directors and executive officers in connection with a legal proceeding to the fullest extent permitted by Delaware law.</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The indemnification provisions contained in our Amended and Restated Certificate of Incorporation are not exclusive of any other rights to which a person may be entitled by law, agreement, vote of stockholders or disinterested directors or otherwise.</font></div><div style="text-align:justify;text-indent:36pt"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">In addition, we maintain insurance on behalf of our directors and executive officers that insures them against any liability asserted against them in their capacities as directors or officers or arising out of such status.</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">INSOFAR AS INDEMNIFICATION FOR LIABILITIES ARISING UNDER THE SECURITIES ACT MAY BE PERMITTED TO DIRECTORS, OFFICERS OR PERSONS CONTROLLING THE COMPANY PURSUANT TO THE FOREGOING PROVISIONS, THE COMPANY HAS BEEN INFORMED THAT IN THE OPINION OF THE SECURITIES AND EXCHANGE COMMISSION, SUCH INDEMNIFICATION IS AGAINST PUBLIC POLICY AS EXPRESSED IN THE SECURITIES ACT AND IS THEREFORE UNENFORCEABLE.</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Other Arrangements</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">We maintain a &#8220;claims made&#8221; officers and directors liability insurance policy with coverage limits of $10,000,000 and a maximum $1,000,000 deductible amount for each claim.</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item 15. &#160;&#160;&#160;&#160;Recent Sales of Unregistered Securities</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">On May 1, 2025, we issued to an accredited investor an aggregate of 240,256 shares of our common stock upon conversion of an aggregate of $514,148.22 in principal amount and accrued interest due under a promissory note. The shares were issued in reliance upon exemptions set forth in Section 4(a)(2) of the Securities Act and applicable blue sky law. The issuance of such shares was approved by independent members of our board of directors.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item 16.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Exhibits and Financial Statement Schedules</font></div><div style="text-align:justify"><font><br></font></div><div style="padding-left:18pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">(a)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%;padding-left:6.34pt">Exhibits. </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">The list of exhibits is set forth below.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:center"><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:12.00pt">II-2</font></div><div style="text-align:justify"><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="text-align:center;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">EXHIBIT INDEX</font></div><div style="text-align:justify"><font><br></font></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:9.630%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:88.170%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:0.37pt;padding-right:0.37pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%">Exhibit </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:120%;text-decoration:underline">Number</font></div></td><td colspan="3" style="padding:2px 1.18pt;text-align:center;vertical-align:bottom"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:700;line-height:100%;text-decoration:underline">Description</font></td></tr><tr style="height:12pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">1.1 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:139%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/underwritingagreementandfo.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:139%;text-decoration:none">Form of Underwriting Agreement between the Registrant and Roth Capital Partners, LLC. </a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">2.1</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743516000169/a201611018-kmergerexagt.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Agreement and Plan of Merger, dated as of November 1, 2016, by and among Tecogen Inc, American DG Energy Inc. and ADGE.Tecogen Merger Sub Inc. incorporated by reference to Exhibit 2.1 to the registrant's Current Report on Form 8-K, filed with the SEC on November 2, 2016.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">2.2</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743517000026/tgn-201703238kex22mergera1.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Amendment No. 1 to the Agreement and Plan of Merger, dated as of March 23, 2017, by and among Tecogen Inc., American DG Energy Inc., and ADGE.Tecogen Merger Sub Inc. incorporated by reference to Exhibit 2.2 to the registrant's Current Report on Form 8-K, filed with the SEC on March 24, 2017.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">3.1</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743514000052/tgn-20140619xs1a3ex31certo.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Amended and Restated Certificate of Incorporation incorporated by reference to Exhibit 3.1 to the registrant's Pre-Effective Amendment No. 3 to its Registration Statement on Form S-1 (Registration No. 333-193791), filed with the SEC on June 27, 2014.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">3.2</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743514000052/tgn-20140619xs1a3ex32bylaws.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Amended and Restated Bylaws incorporated by reference to Exhibit 3.2 to the registrant's Pre-Effective Amendment No. 3 to its Registration Statement on Form S-1 (Registration No. 333-193791), filed with the SEC on June 27, 2014.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">4.1</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743514000052/tgn-20140619xs1a3ex41stksp.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Specimen Common Stock Certificate of Tecogen Inc. incorporated by reference to Exhibit 4.1 to the registrant's Pre-Effective Amendment No. 3 to its Registration Statement on Form S-1 (Registration No. 333-193791), filed with the SEC on June 27, 2014.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">4.2+</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743514000052/tgn-20140619xs1a3ex43optio.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Form of Stock Option Agreement incorporated by reference to Exhibit 4.3 to the registrant's Pre-Effective Amendment No. 3 to its Registration Statement on Form S-1 (Registration No. 333-193791), filed with the SEC on June 27, 2014.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">4.3</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743520000004/exhibit44-descregistrantss.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Description of Registrant's Securities incorporated herein by reference to Exhibit 4.4 to the registrant&#8217;s Annual Report on   Form 10-K for the year ended December 31, 2019, filed with the SEC on March 12, 2020.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">5.1 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#0000ff;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/somertonslegalopinion2.htm" style="color:#0000ff;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">&#160;</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/somertonslegalopinion2.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Legal Opinion of Somertons, PLLC. </a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.1+</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743518000028/tgn_2006stockoptionplaname.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Tecogen Inc. 2006 Stock Incentive Plan, as amended and restated on November 1, 2016, incorporated by reference to Exhibit 10.1 to the registrant's Annual Report on Form 10-K for the year ended December 31, 2017, filed with the SEC on March 21, 2018.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.2#</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743514000052/tgn-20140619xs1a3ex1013wis.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Exclusive License Agreement between Tecogen Inc. and the Wisconsin Alumni Research Foundation, dated February 5, 2007, incorporated by reference to Exhibit 10.13 to the registrant's Pre-Effective Amendment No. 3 to its Registration Statement on Form S-1 (Registration No. 333-193791), filed with the SEC on June 27, 2014.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.3</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743514000064/tgn-20140630xex1024adgeagt.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Facilities and Support Services Agreement between American DG Energy Inc. and Tecogen Inc., dated August&#160;8,&#160;2014, incorporated by reference to Exhibit 10.1 to American DG Energy Inc.'s Quarterly Report on Form 10-Q for the quarter ended June 30, 2014, filed with the SEC on August 14, 2014.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.4</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:middle"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:-0.63pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743515000040/tgn-201508038kex1029regrig.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Shelf Registration Rights Agreement dated August 3, 2015, incorporated by reference to Exhibit 10.29 to the registrant's Current Report on Form 8-K, filed with the SEC on August 8, 2015.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.5+</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:-0.63pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743518000002/advisoragreement.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Advisory Agreement, dated January 3, 2018, between Tecogen Inc. and John N. Hatsopoulos incorporated by reference to Exhibit 10.1 to the registrant's Current Report on Form 8-K, filed with the SEC on January 8, 2018.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.6</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:13.5pt;padding-right:-0.63pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743518000004/southwest8kexhibit.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Research and Development Contract between Southwest Research Institute and Tecogen Inc. incorporated by reference to Exhibit 10.1 to the registrant's Current Report on Form 8-K, filed with the SEC on January 9, 2018.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.7</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:-0.63pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000006/membershippurchaserecogeno.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Membership Interest Purchase Agreement by and among SDCL TG Cogen LLC, as Purchaser, and American DG Energy Inc., as Seller, and Tecogen Inc. dated as of December 14, 2018, incorporated by reference to Exhibit 10.48 to the registrant's Current Report on Form 8-K, filed with the SEC on March 7, 2019</a>.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.8</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000006/guarantyrecogenone.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Guaranty Agreement by Tecogen Inc. in favor of CogenOne LLC and SDCL TG Cogen LLC dated December 14, 2018, incorporated by reference to Exhibit 10.49 to the registrant's Current Report on Form 8-K, filed with the SEC on March 7, 2019.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:0.37pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">10.9</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000006/membershippurchaserecogent.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Membership Interest Purchase Agreement by and among SDCL TG Cogen LLC, as Purchaser, and American DG Energy Inc., as Seller, and Tecogen Inc. dated as of March 5, 2019, incorporated by reference to Exhibit 10.50 to the registrant's Current Report on Form 8-K, filed with the SEC on March 7, 2019</a>.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.10</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000006/guarantyrecogentwo.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Guaranty Agreement by Tecogen Inc. in favor of CogenTwo LLC and SDCL TG Cogen LLC dated March 5, 2019, incorporated by reference to Exhibit 10.51 to the registrant's Current Report on Form 8-K, filed with the SEC on March 7, 2019.</a></font></div></td></tr></table></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:12.00pt">II-3</font></div><div style="text-align:justify"><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:9.630%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:88.170%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.11</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000006/billingagreementrecogentwo.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Billing and Asset Management Agreement by and among CogenOne LLC and Tecogen Inc. as amended and restated as of March 5, 2019, incorporated by reference to Exhibit 10.52 to the registrant's Current Report on Form 8-K, filed with the SEC on March 7, 2019).</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.12</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000006/billingagreementrecogenone.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Billing and Asset Management Agreement by and among CogenTwo LLC and Tecogen Inc. dated March 5, 2019, incorporated by reference to Exhibit 10.53 to the registrant's Current Report on Form 8-K, filed with the SEC on March 7, 2019.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.13</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.87pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000038/letterreadvisoryagreement2.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Letter Agreement dated July 22, 2019, amending Advisory Agreement dated January 3, 2018 between Tecogen Inc. and John N. Hatsopoulos incorporated by reference to Exhibit 10.1 to the registrant's Current Report on Form 8-K, as filed with the SEC on July 24, 2019</a></font><font style="color:#0000ff;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743519000038/letterreadvisoryagreement2.htm" style="color:#0000ff;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:0.37pt;padding-right:0.37pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">10.14+</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:5pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743520000082/cicplan.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Tecogen Change in Control Severance Benefit Plan, dated July 9, 2020, incorporated herein by reference to Exhibit 99.01 to the registrant's Current Report on Form 8-K filed with the SEC on July 21, 2020.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.15 +</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:5pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/0001537435/000153743522000009/tecogen2022stockincentivep.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Tecogen Inc. 2022 Stock Incentive Plan incorporated herein by reference to Exhibit 10.1 to the registrant's Current Report on Form 8-K filed with the SEC on March 9, 2022.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.16+</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Amendment to Advisory Agreement, dated July 22, 2019, between the registrant and John Hatsopoulos, incorporated by reference to Exhibit 10.1 to the registrant&#8217;s Current Report on Form 8-K, filed with the SEC on July 25, 2019.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.17</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743523000131/jnhnotesubscription.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Note Subscription Agreement dated October 9, 2023, by John H. Hatsopoulos, incorporated herein by reference to Exhibit 99.01 to the registrant's Current Report on Form 8-K filed with the SEC on October 10, 2023</a>.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.18</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743523000131/erlnotesubscription.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Note Subscription Agreement dated October 9, 2023, by John H. Hatsopoulos, incorporated herein by reference to Exhibit 99.01 to the registrant's Current Report on Form 8-K filed with the SEC on October 10, 2023</a></font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:400;line-height:120%">.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.19</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Promissory Note for Paycheck Protection Program Second Draw Loan from Webster Bank, N.A. dated February 5, 2021, in the amount of $1,874,269.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.20 +</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/0001537435/000153743522000009/tecogendirectorcomppolicy.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Tecogen Inc. Policy Regarding Compensation of Non-Employee Directors filed with the Current Report on Form 8-K filed with the SEC on March 9, 2022.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.21</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743523000009/aegisassignmentagreement.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Agreement Regarding the Assignment of Certain Maintenance Agreements, the Purchase and Sale of Certain Assets, and Related Matters with Aegis Energy Services LLC, incorporated by reference to Exhibit 99.01 to the registrant's Current Report on Form 8-K filed with the SEC on March 16, 2023.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.22</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/ix?doc=/Archives/edgar/data/1537435/000153743524000015/tgen-20240201.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Amendment to the Agreement Regarding Assignment of Certain Maintenance Agreements dated as of March 15, 2023 with Aegis Energy Services, LLC, incorporated by reference to Exhibit 99.01 to the registrant's Current Report of Form 8-K filed with the SEC on February 2, 2024.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.23</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000012/salesandmarketingagreement.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Sales and Marketing Agreement Between Vertiv Corporation and Tecogen Regarding Data Center Cooling Applications, dated February 28, 2025, incorporated by reference to Current Report on Form 8-K, filed with the SEC on March 3, 2025.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.24 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/relatedpersontransactionsp.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Policy and Procedures Governing Related Person Transactions </a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.25 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/executiveofficerclawbackpo.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Executive Officer Clawback Policy </a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.26</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Tecogen Policy Regarding Insider Trading incorporated by reference to Exhibit 19.1 to Annual Report on Form 10-K filed with the SEC on March 18, 2025.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">10.27 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/formoflock-upagreement.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Form of Lock Up Agreement </a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">21.1</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743521000011/listofsubsidiaries.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">List of subsidiaries incorporated by reference to Exhibit 21.1 to the registrants Post-Effective Amendment No. 1 to Form S-3 on Form S-1 Registration Statement Under the Securities Act of 1933, filed with the SEC on March 12, 2021.</a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">23.1 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/wolfcoconsenttofiles-1.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Consent of Wolf &#38; Company, P.C. </a></font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">23.2 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Consent of Somertons, PLLC (included in Exhibit 5.1 hereto). </font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">24.1</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Power of Attorney of certain directors and officers of the Registrant (included on signature page to the initial filing of this Registration Statement).</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">107.1 *</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%"><a href="https://www.sec.gov/Archives/edgar/data/1537435/000153743525000073/tecogencalculationoffiling.htm" style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%;text-decoration:none">Filing Fee Table.</a></font></div></td></tr><tr style="height:12pt"><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:0 1pt"></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">*</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="margin-bottom:2pt;margin-top:2pt;padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Previously filed as an exhibit to initial filing of this Registration Statement.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">#</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:10.77pt;padding-right:-2.13pt;text-align:justify;text-indent:-0.6pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Confidential Treatment has been granted for portions of this document. The confidential portions were omitted and filed separately, on a confidential basis, with the Securities and Exchange Commission.</font></div></td></tr><tr><td colspan="3" style="padding:2px 1.37pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:100%">+</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:10.77pt;padding-right:-2.13pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:9pt;font-weight:400;line-height:120%">Management contract or compensatory plan or agreement.</font></div></td></tr></table></div><div style="padding-left:18pt;text-align:justify;text-indent:-18pt"><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:12.00pt">II-4</font></div><div style="text-align:justify"><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">(b)&#160;&#160;&#160;&#160;Financial Statement Schedules.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Schedules have been omitted because the information required to be set forth therein is not applicable or are shown in our consolidated financial statements and notes thereto.</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">Item 17.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Undertakings</font></div><div style="text-align:justify"><font><br></font></div><div style="padding-left:36pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(h)&#160;&#160;&#160;&#160;Indemnification.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Insofar as indemnification for liabilities arising under the Securities Act of 1933 may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the Securities and Exchange Commission such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable.  In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(i) &#160;&#160;&#160;&#160;The undersigned registrant hereby undertakes&#58;</font></div><div style="padding-left:36pt;text-align:justify"><font><br></font></div><div style="padding-left:72pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(i)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:26.57pt">That for purposes of determining any liability under the Securities Act, the information omitted from the form or prospectus filed as part of this registrations statement in reliance upon Rule 430A and contained in a form of prospectus shall be filed by the registrant pursuant to Rule 424(b)(1) or (4) or 497(h) under the Securities Act shall be deemed to be part of this registration statement as of the time it was declared effective.</font></div><div style="padding-left:72pt;text-align:justify"><font><br></font></div><div style="padding-left:72pt;text-align:justify;text-indent:-36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">(ii)</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:23.8pt">For purposes of determining any liability under the Securities Act of 1933, each post-effective amendment that contains a form of prospectus shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be as of the initial </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">bona fide</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"> offering thereof.</font></div><div style="text-align:justify"><font><br></font></div><div style="text-align:center"><font><br></font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:12.00pt">II-5</font></div><div style="text-align:justify"><font><br></font></div></div></div><hr style="page-break-after:always"><div style="min-height:72pt;width:100%"><div><font><br></font></div></div><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">SIGNATURES</font></div><div><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the Town of North Billerica, Commonwealth of Massachusetts, on July 16, 2025.</font></div><div style="text-align:justify"><font><br></font></div><div style="padding-left:27.9pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:94.230%"><tr><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:48.900%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%">TECOGEN INC.</font></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">By&#58;  </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">&#47;s&#47; Abinand Rangesh</font></div><div style="padding-left:19.57pt;padding-right:2.77pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Abinand Rangesh</font></div><div style="padding-left:19.57pt;padding-right:2.77pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Chief Executive Officer and Chief </font></div><div style="padding-left:19.57pt;padding-right:2.77pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Financial Officer (</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Principal Executive Officer and Principal Financial Officer)</font></div></td></tr></table></div><div style="text-align:justify"><font><br></font></div><div style="text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Pursuant to the requirements of the Securities Act of 1933, this Amendment No. 1 to the Registration Statement has been signed by the following persons in the capacities and on the dates indicated.</font></div><div style="text-align:justify"><font><br></font></div><div style="padding-left:23.4pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:95.032%"><tr><td style="width:1.0%"></td><td style="width:38.191%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:38.360%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:20.149%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline">Signature</font></td><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%;text-decoration:underline">Title</font></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify;text-indent:36pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%;text-decoration:underline">Date</font></div></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">&#47;s&#47; Abinand Rangesh</font></div><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Abinand Rangesh</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:middle"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Chief Executive Officer, Chief Financial Officer, and Director (</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Principal Executive Officer and Principal Financial Officer)</font></div></td><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%;text-decoration:underline">&#47;s&#47; Roger P. Deschenes</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">                     Roger P. Deschenes</font></div></td><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:middle"><div style="padding-left:2.77pt;text-align:justify"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Chief Accounting Officer </font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:100%">(Princpal Accounting Officer)</font></div></td><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr style="height:19pt"><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">*</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director and Chairperson</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr style="height:14pt"><td colspan="3" style="border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Angelina M. Galiteva</font></div></td></tr><tr style="height:18pt"><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">*</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Lead Director</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr style="height:14pt"><td colspan="3" style="border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">John N. Hatsopoulos</font></div></td></tr><tr style="height:17pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">*                          </font></div></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr style="height:14pt"><td colspan="3" style="border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Ahmed F. Ghoniem</font></div></td></tr><tr style="height:17pt"><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">*</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr style="height:14pt"><td colspan="3" style="border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">Earl R. Lewis, III</font></div></td></tr><tr style="height:22pt"><td colspan="3" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">*</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr style="height:14pt"><td colspan="3" style="border-top:0.5pt solid #000000;padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Susan F. Hirsch</font></td></tr><tr style="height:22pt"><td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">*</font></div></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:justify;vertical-align:middle"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">Director</font></td><td colspan="3" rowspan="2" style="padding:2px 3.77pt 2px 1pt;text-align:right;vertical-align:top"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%">July 16, 2025</font></td></tr><tr style="height:18pt"><td colspan="3" style="border-top:0.5pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:top"><div style="padding-left:2.77pt;padding-right:2.77pt;text-align:justify"><font style="background-color:#ffffff;color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">John M. Albertine</font></div></td></tr></table></div><div style="text-align:justify"><font><br></font></div><div style="padding-left:18pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%">*&#160;&#160;&#160;&#160;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">By&#58; &#47;</font><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%;text-decoration:underline">s&#47; John K. Whiting, IV</font></div><div style="padding-left:18pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;John K. Whiting, IV</font></div><div style="padding-left:18pt;text-align:justify;text-indent:-18pt"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%">&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;Attorney-in-Fact</font></div><div style="height:72pt;position:relative;width:100%"><div style="bottom:0;position:absolute;width:100%"><div style="text-align:center"><font style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:12.00pt">II-6</font></div><div style="text-align:justify"><font><br></font></div></div></div></body></html>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
