    <SEC-DOCUMENT>0001213900-21-021456-index.html : 20210414
    <SEC-HEADER>0001213900-21-021456.hdr.sgml : 20210414
    <ACCEPTANCE-DATETIME>20210414092232
    ACCESSION NUMBER:		0001213900-21-021456
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		25
    CONFORMED PERIOD OF REPORT:	20210413
    ITEM INFORMATION:		Entry into a Material Definitive Agreement
    ITEM INFORMATION:		Unregistered Sales of Equity Securities
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20210414
    DATE AS OF CHANGE:		20210414

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BCTG Acquisition Corp.
    		CENTRAL INDEX KEY:			0001819133
    		STANDARD INDUSTRIAL CLASSIFICATION:	BLANK CHECKS [6770]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			CA
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-39485
    		FILM NUMBER:		21824673

    	BUSINESS ADDRESS:
    		STREET 1:		12860 EL CAMINO REAL, SUITE 300
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92130
    		BUSINESS PHONE:		(858) 400-3115

    	MAIL ADDRESS:
    		STREET 1:		12860 EL CAMINO REAL, SUITE 300
    		CITY:			SAN DIEGO
    		STATE:			CA
    		ZIP:			92130
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>ea139433-8k_bctgacq.htm
    <DESCRIPTION>CURRENT REPORT
    <TEXT>
    Document 1 - file: ea139433-8k_bctgacq.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-2.1
    <SEQUENCE>2
    <FILENAME>ea139433ex2-1_bctgacq.htm
    <DESCRIPTION>AGREEMENT AND PLAN OF MERGER, DATED AS OF APRIL 13, 2021 BY AND AMONG BCTG ACQUISITION CORP., BCTG MERGER SUB INC. AND TANGO THERAPEUTICS, INC
    <TEXT>
    Document 2 - file: ea139433ex2-1_bctgacq.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.1
    <SEQUENCE>3
    <FILENAME>ea139433ex10-1_bctgacq.htm
    <DESCRIPTION>FORM OF SUBSCRIPTION AGREEMENT, DATED AS OF APRIL 13, 2021 BY AND AMONG BCTG ACQUISITION CORP. AND CERTAIN INSTITUTIONAL AND ACCREDITED INVESTORS
    <TEXT>
    Document 3 - file: ea139433ex10-1_bctgacq.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>4
    <FILENAME>ea139433ex99-1_bctgacq.htm
    <DESCRIPTION>PRESS RELEASE DATED APRIL 14, 2021
    <TEXT>
    Document 4 - file: ea139433ex99-1_bctgacq.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.2
    <SEQUENCE>5
    <FILENAME>ea139433ex99-2_bctgacq.htm
    <DESCRIPTION>INVESTOR PRESENTATION DATED APRIL 14, 2021
    <TEXT>
    Document 5 - file: ea139433ex99-2_bctgacq.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>image_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: image_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>image_002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: image_002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>image_003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: image_003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>image_004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: image_004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>image_005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: image_005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>image_006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: image_006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>ex99-2_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: ex99-2_001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>ex99-2_002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: ex99-2_002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>ex99-2_003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: ex99-2_003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>ex99-2_004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: ex99-2_004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>ex99-2_005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: ex99-2_005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>ex99-2_006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: ex99-2_006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>ex99-2_007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: ex99-2_007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>ex99-2_008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: ex99-2_008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>ex99-2_009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: ex99-2_009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>ex99-2_010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: ex99-2_010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>ex99-2_011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: ex99-2_011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>ex99-2_012.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: ex99-2_012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>ex99-2_013.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: ex99-2_013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>ex99-2_014.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: ex99-2_014.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>