<SEC-DOCUMENT>0000904454-22-000006.txt : 20220104
<SEC-HEADER>0000904454-22-000006.hdr.sgml : 20220104
<ACCEPTANCE-DATETIME>20220104103558
ACCESSION NUMBER:		0000904454-22-000006
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20220104
DATE AS OF CHANGE:		20220104

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SERA PROGNOSTICS, INC.
		CENTRAL INDEX KEY:			0001534969
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-MEDICAL LABORATORIES [8071]
		IRS NUMBER:				261911522
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-92704
		FILM NUMBER:		22504506

	BUSINESS ADDRESS:	
		STREET 1:		2749 E. PARLEYS WAY
		STREET 2:		SUITE 200
		CITY:			SALT LAKE CITY
		STATE:			UT
		ZIP:			84109
		BUSINESS PHONE:		(801) 990-0520

	MAIL ADDRESS:	
		STREET 1:		2749 E. PARLEYS WAY
		STREET 2:		SUITE 200
		CITY:			SALT LAKE CITY
		STATE:			UT
		ZIP:			84109

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Domain Partners VIII, L.P.
		CENTRAL INDEX KEY:			0001465144
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		C/O DOMAIN ASSOCIATES, L.L.C.
		STREET 2:		ONE PALMER SQUARE, SUITE 515
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
		BUSINESS PHONE:		609-683-5656

	MAIL ADDRESS:	
		STREET 1:		C/O DOMAIN ASSOCIATES, L.L.C.
		STREET 2:		ONE PALMER SQUARE, SUITE 515
		CITY:			PRINCETON
		STATE:			NJ
		ZIP:			08542
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>s13g_123121-seraprog.htm
<DESCRIPTION>SCHEDULE 13G
<TEXT>
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  <div style="text-align: center; font-size: 12pt;">SECURITIES AND EXCHANGE COMMISSION</div>
  <div style="text-align: center; font-size: 12pt;">Washington, D.C.&#160; 20549</div>
  <div style="text-align: center; font-size: 12pt;"><u>_____________________</u></div>
  <div><br>
  </div>
  <div style="text-align: center; font-size: 12pt;">SCHEDULE 13G</div>
  <div style="text-align: center; font-size: 12pt;">(Rule 13d-102)</div>
  <div><br>
  </div>
  <div style="text-align: center; font-size: 12pt;">INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT</div>
  <div style="text-align: center; font-size: 12pt;">TO RULES 13d-1(b),(c) AND (d) AND AMENDMENTS THERETO FILED</div>
  <div style="text-align: center; font-size: 12pt;">PURSUANT TO RULE 13d-2(b)</div>
  <div style="text-align: center; font-size: 12pt;">(Amendment No.&#160; )<sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">1</sup></div>
  <div><br>
  </div>
  <table cellspacing="0" cellpadding="0" id="z4cae63415c1c4d29ac3b9bf8f8d0c4ac" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

      <tr>
        <td style="width: 100%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">SERA PROGNOSTICS, INC.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="text-align: center; font-size: 12pt;">(Name of Issuer)</div>
          <div style="text-align: center; font-size: 12pt;"> <br>
          </div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">Class A Common Stock, $0.0001 par value</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="text-align: center; font-size: 12pt;">(Title of Class of Securities)</div>
          <div style="text-align: center; font-size: 12pt;"> <br>
          </div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">81749D107</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="text-align: center; font-size: 12pt;">(CUSIP Number)</div>
          <div style="text-align: center; font-size: 12pt;"> <br>
          </div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">December 31, 2021</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="text-align: center; font-size: 12pt;">(Date of Event which Requires Filing of this Statement)</div>
        </td>
      </tr>

  </table>
  <div><br>
  </div>
  <div style="font-size: 12pt;">Check the appropriate box to designate the rule pursuant to which this Schedule is Filed:</div>
  <div><br>
  </div>
  <div style="text-indent: 31.5pt; font-size: 12pt;">[ ] Rule 13d-1(b)</div>
  <div style="text-indent: 31.5pt; font-size: 12pt;">[ ] Rule 13d-1(c)</div>
  <div style="text-indent: 31.5pt; font-size: 12pt;">[X] Rule 13d-1(d)</div>
  <div><br>
  </div>
  <div><br>
  </div>
  <div style="font-size: 12pt;">_______________________</div>
  <div style="text-indent: 31.5pt; font-size: 12pt;"><sup style="vertical-align: text-top; line-height: 1; font-size: smaller;">1</sup>The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to
    the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.&#160; The information required on the remainder of this cover page shall not be deemed to be "filed" for
    the purpose of Section 18 of the Securities Exchange Act of 1934 or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act.</div>
  <div><br>
  </div>
  <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
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  </div>
  <div><font style="font-size: 12pt;">CUSIP No. 81749D107</font><br>
  </div>
  <div><br>
  </div>
  <table cellspacing="0" cellpadding="0" id="zd01ef856c2874e319261dff0c2dad769" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;" rowspan="2">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">1</div>
        </td>
        <td style="width: 77.98%; vertical-align: top;" colspan="4">
          <div>NAMES OF REPORTING PERSONS</div>
          <div>I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY):</div>
          <div>&#160;</div>
          <div>Domain Partners VIII, L.P.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 77.98%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="4">&#160;</td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">2</div>
        </td>
        <td style="width: 52.64%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="3">
          <div>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 25.34%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div><font style="font-weight: bold;">(</font>a) [X]</div>
          <div>(b) [&#160;&#160; ]</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">3</div>
        </td>
        <td style="width: 77.98%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="4">
          <div>SEC USE ONLY</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">4</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>CITIZENSHIP OR PLACE OF ORGANIZATION</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right;">Delaware</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: middle; border-bottom: #000000 2px solid;" rowspan="4">
          <div style="text-align: center;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
        </td>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">5</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="font-size: 12pt;">SOLE VOTING POWER</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">2,523,771</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">6</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SHARED VOTING POWER</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">7</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SOLE DISPOSITIVE POWER</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">2,523,771</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">8</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SHARED DISPOSITIVE POWER</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">9</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">2,523,771</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">10</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt; font-weight: bold;">[&#160;&#160; ]</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">11</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">8.6%**</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">12</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">PN</div>
        </td>
      </tr>

  </table>
  <div style="font-size: 12pt;">* As of December 31, 2021 and including 125,328 shares issuable upon exercise of warrants</div>
  <div style="font-size: 12pt;">** Based on 29,293,831 shares of Common Stock outstanding as of November 5, 2021, as reported in the Issuer&#8217;s Report on Form 10-Q for the period ended September 30, 2021 filed with the Securities and Exchange Commission on
    November 9, 2021</div>
  <div style="font-size: 12pt;"> <br>
  </div>
  <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
    <div style="text-align: center;" id="DSPFPageNumberArea"><font style="font-size: 8pt; font-weight: normal; font-style: normal;" id="DSPFPageNumber">2</font></div>
    <div id="DSPFPageBreak" style="page-break-after:always;">
      <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
  </div>
  <div><font style="font-size: 12pt;">CUSIP No. 81749D107</font></div>
  <div><br>
  </div>
  <table cellspacing="0" cellpadding="0" id="z0cc7942c0e4741bda4be6220ca1882e4" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;" rowspan="2">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">1</div>
        </td>
        <td style="width: 77.98%; vertical-align: top;" colspan="4">
          <div>NAMES OF REPORTING PERSONS</div>
          <div>I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY):</div>
          <div>&#160;</div>
          <div>DP VIII Associates, L.P.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 77.98%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="4">&#160;</td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">2</div>
        </td>
        <td style="width: 52.64%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="3">
          <div>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 25.34%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div><font style="font-weight: bold;">(</font>a) [X]</div>
          <div>(b) [&#160;&#160; ]</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">3</div>
        </td>
        <td style="width: 77.98%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="4">
          <div>SEC USE ONLY</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">4</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>CITIZENSHIP OR PLACE OF ORGANIZATION</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right;">Delaware</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: middle; border-bottom: #000000 2px solid;" rowspan="4">
          <div style="text-align: center;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
        </td>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">5</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="font-size: 12pt;">SOLE VOTING POWER</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">18,726</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">6</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SHARED VOTING POWER</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">7</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SOLE DISPOSITIVE POWER</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">18,726</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">8</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SHARED DISPOSITIVE POWER</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">9</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">18,726</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">10</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt; font-weight: bold;">[&#160;&#160; ]</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">11</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0.1%**</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">12</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">PN</div>
        </td>
      </tr>

  </table>
  <div style="font-size: 12pt;">* As of December 31, 2021 and including 930 shares issuable upon exercise of warrants</div>
  <div style="font-size: 12pt;">** Based on 29,293,831 shares of Common Stock outstanding as of November 5, 2021, as reported in the Issuer&#8217;s Report on Form 10-Q for the period ended September 30, 2021 filed with the Securities and Exchange Commission on
    November 9, 2021</div>
  <div style="font-size: 12pt;"> <br>
  </div>
  <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
    <div style="text-align: center;" id="DSPFPageNumberArea"><font style="font-size: 8pt; font-weight: normal; font-style: normal;" id="DSPFPageNumber">3</font></div>
    <div id="DSPFPageBreak" style="page-break-after:always;">
      <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
  </div>
  <div><font style="font-size: 12pt;">CUSIP No. 81749D107</font></div>
  <div><br>
  </div>
  <table cellspacing="0" cellpadding="0" id="ze2bc15ce7c724c4fac11119099e5754e" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;" rowspan="2">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">1</div>
        </td>
        <td style="width: 77.98%; vertical-align: top;" colspan="4">
          <div>NAMES OF REPORTING PERSONS</div>
          <div>I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY):</div>
          <div>&#160;</div>
          <div>Domain Associates, LLC</div>
        </td>
      </tr>
      <tr>
        <td style="width: 77.98%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="4">&#160;</td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">2</div>
        </td>
        <td style="width: 52.64%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="3">
          <div>CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 25.34%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div><font style="font-weight: bold;">(</font>a) [X]</div>
          <div>(b) [&#160;&#160; ]</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">3</div>
        </td>
        <td style="width: 77.98%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="4">
          <div>SEC USE ONLY</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">4</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>CITIZENSHIP OR PLACE OF ORGANIZATION</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right;">Delaware</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: middle; border-bottom: #000000 2px solid;" rowspan="4">
          <div style="text-align: center;">NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH</div>
        </td>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">5</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="font-size: 12pt;">SOLE VOTING POWER</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">30,920</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">6</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SHARED VOTING POWER</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">7</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SOLE DISPOSITIVE POWER</div>
          <div>&#160;</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">30,920</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 8.83%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">8</div>
        </td>
        <td style="width: 35.9%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div>SHARED DISPOSITIVE POWER</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">9</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">30,920</div>
          <div style="text-align: right; font-size: 12pt;">Shares of Common Stock*</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">10</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt; font-weight: bold;">[&#160;&#160; ]</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">11</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">0.1%**</div>
        </td>
      </tr>
      <tr>
        <td style="width: 22.02%; vertical-align: top; border-bottom: #000000 2px solid;">
          <div style="text-align: center; font-size: 12pt; font-weight: bold;">12</div>
        </td>
        <td style="width: 44.73%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div>TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)</div>
          <div>&#160;</div>
        </td>
        <td style="width: 33.24%; vertical-align: top; border-bottom: #000000 2px solid;" colspan="2">
          <div style="text-align: right; font-size: 12pt;">PN</div>
        </td>
      </tr>

  </table>
  <div style="font-size: 12pt;">* As of December 31, 2021</div>
  <div style="font-size: 12pt;">** Based on 29,293,831 shares of Common Stock outstanding as of November 5, 2021, as reported in the Issuer&#8217;s Report on Form 10-Q for the period ended September 30, 2021 filed with the Securities and Exchange Commission on
    November 9, 2021</div>
  <div style="font-size: 12pt;"> <br>
  </div>
  <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
    <div style="text-align: center;" id="DSPFPageNumberArea"><font style="font-size: 8pt; font-weight: normal; font-style: normal;" id="DSPFPageNumber">4</font></div>
    <div id="DSPFPageBreak" style="page-break-after:always;">
      <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
  </div>
  <div style="font-family: 'Times New Roman',Times,serif; font-size: 12pt;">CUSIP No. 81749D107</div>
  <div style="text-align: center; font-size: 12pt;"><u>Schedule 13G</u></div>
  <div><br>
  </div>
  <table cellspacing="0" cellpadding="0" id="z5d8045a6769d4d8a8bb29bf5255a3efc" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 1(a) Name of Issuer:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Sera Prognostics, Inc.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 1(b) Address of Issuer&#8217;s Principal Executive Offices:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">2749 E. Parleys Way, Suite 200, Salt Lake City, UT&#160; 84109</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 2(a) Name of Person Filing:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">This statement is being filed by Domain Partners VIII, L.P., a Delaware limited partnership (&#8220;Domain VIII&#8221;), DP VIII Associates, L.P., a Delaware limited partnership (&#8220;DP VIII A&#8221;), and Domain Associates, LLC, a
            Delaware limited liability company (&#8220;DA&#8221; and together with Domain VIII and DP VIII A, the &#8220;Reporting Persons&#8221;).&#160; The Joint Filing Agreement among the Reporting Persons is attached hereto as Exhibit A.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">One Palmer Square Associates VIII, LLC, a Delaware limited liability company (&#8220;OPSA VIII&#8221;), is the sole general partner of Domain VIII and DP VIII A, and therefore may be deemed to indirectly beneficially own the
            securities reported herein as directly beneficially owned by Domain VIII and DP VIII A, however OPSA VIII expressly disclaims beneficial ownership of such securities.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 2(b) Address of Principal Business Office:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">For each Reporting Person:&#160; 103 Carnegie Center, Suite 300, Princeton, NJ&#160; 08540</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 2(c) Place of Organization:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Domain VIII: Delaware</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">DP VIII A: Delaware</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">DA: Delaware</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 2(d) Title of Class of Securities:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Class A Common Stock, $0.0001 par value</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 2(e) CUSIP Number:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">81749D107</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 3 Statements Filed Pursuant to Rules 13d-1(b) or 13d-2(b):</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Not applicable.</div>
          <div style="font-size: 12pt;"> <br>
          </div>
        </td>
      </tr>

  </table>
  <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
    <div style="text-align: center;" id="DSPFPageNumberArea"><font style="font-size: 8pt; font-weight: normal; font-style: normal;" id="DSPFPageNumber">5</font></div>
    <div id="DSPFPageBreak" style="page-break-after:always;">
      <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
  </div>
  <div><font style="font-size: 12pt;">CUSIP No. 81749D107</font></div>
  <div><br>
  </div>
  <div><br>
  </div>
  <table cellspacing="0" cellpadding="0" id="z34dbffc971c346148af41b29476ad1b7" style="font-family: 'Times New Roman', Times, serif; font-size: 10pt; width: 100%; text-align: left; color: #000000;">

      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 4 Ownership:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">(a) through (c):&#160; The information requested in these paragraphs is incorporated herein by reference to the cover pages to this Schedule 13G.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 5 Ownership of Five Percent or Less of a Class:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Not applicable.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 6 Ownership of More than Five Percent on Behalf of Another Person:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Not applicable.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 7 Identification and Classification of Subsidiary:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Not applicable.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 8 Identification and Classification of Members of Group:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Not applicable.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 9 Notice of Dissolution of Group:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Not applicable.</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt; font-weight: bold;">Item 10 Certification:</div>
        </td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">&#160;</td>
      </tr>
      <tr>
        <td style="width: 100%; vertical-align: top;">
          <div style="font-size: 12pt;">Not applicable.</div>
        </td>
      </tr>

  </table>
  <div id="DSPFPageBreakArea" style="clear: both; margin-top: 10pt; margin-bottom: 10pt;">
    <div style="text-align: center;" id="DSPFPageNumberArea"><font style="font-size: 8pt; font-weight: normal; font-style: normal;" id="DSPFPageNumber">6</font></div>
    <div id="DSPFPageBreak" style="page-break-after:always;">
      <hr noshade="noshade" style="margin: 4px 0px; width: 100%; border-width: 0; height: 2px; color: #000000; background-color: #000000; clear: both;"></div>
  </div>
  <div style="font-family: 'Times New Roman',Times,serif; font-size: 12pt;"> CUSIP No. 81749D107</div>
  <div style="text-align: center; font-size: 12pt;"> <br>
  </div>
  <div style="text-align: center; font-size: 12pt;">SIGNATURE</div>
  <div><br>
  </div>
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  <div style="font-family: 'Times New Roman',Times,serif; font-size: 12pt;"> CUSIP No. 81749D107</div>
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  <div style="text-align: right; font-size: 12pt;">EXHIBIT A</div>
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  <div style="text-align: center; margin-top: 6pt; margin-bottom: 6pt; font-size: 12pt;">JOINT FILING AGREEMENT</div>
  <div style="font-size: 12pt;">The undersigned hereby agree that the statement on Schedule 13G to which this Agreement is annexed as Exhibit A, and any amendments thereto, is and will be filed on behalf of each of them in accordance with the provisions of
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  <div style="font-size: 12pt;">Dated:&#160; January 4, 2022</div>
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