<SEC-DOCUMENT>0001558370-21-001179-index.html : 20210218
<SEC-HEADER>0001558370-21-001179.hdr.sgml : 20210218
<ACCEPTANCE-DATETIME>20210218072030
ACCESSION NUMBER:		0001558370-21-001179
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		3
CONFORMED PERIOD OF REPORT:	20210217
ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20210218
DATE AS OF CHANGE:		20210218

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Generation Bio Co.
		CENTRAL INDEX KEY:			0001733294
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				814301281
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39319
		FILM NUMBER:		21647664

	BUSINESS ADDRESS:	
		STREET 1:		301 BINNEY STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
		BUSINESS PHONE:		857-529-5908

	MAIL ADDRESS:	
		STREET 1:		301 BINNEY STREET
		CITY:			CAMBRIDGE
		STATE:			MA
		ZIP:			02142
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>tmb-20210217x8k.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: tmb-20210217x8k.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>EX-99.1
<SEQUENCE>2
<FILENAME>tmb-20210217xex99d1.htm
<DESCRIPTION>EX-99.1
<TEXT>
Document 2 - file: tmb-20210217xex99d1.htm

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>3
<FILENAME>tmb-20210217xex99d1001.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 3 - file: tmb-20210217xex99d1001.jpg

</DOCUMENT>
</SEC-DOCUMENT>