Generation Bio Co.

Nasdaq:GBIO

Pharmaceutical Preparations·CAMBRIDGE, MA

A generation is all of the individuals born and living at about the same time, regarded collectively. " In kinship, generation is a structural term, designating the parent–child relationship.

Financials

20 shown

Type	Period	Ended	Filed
10-Q	Q3 2025	9/30/25	11/5/25	→
10-Q	Q2 2025	6/30/25	8/12/25	→
10-Q	Q1 2025	3/31/25	5/7/25	→
10-K	FY 2024	12/31/24	3/13/25	→
10-Q	Q3 2024	9/30/24	11/6/24	→
10-Q	Q2 2024	6/30/24	8/7/24	→
↓

Earnings Releases (8-K)

23 shown

Filed	Period
11/5/25	Q4 FY2025	→
8/12/25	Q3 FY2025	→
5/7/25	Q2 FY2025	→
3/13/25	Q1 FY2025	→
11/6/24	Q4 FY2024	→
8/7/24	Q3 FY2024	→
↓

News (8-K)

30 shown

Filed	Type	Description
2/9/26	Delisting	Entry into a Material Definitive Agreement	→
12/15/25	Agreement	Entry into a Material Definitive Agreement	→
10/22/25	Exec Change	Departure or Appointment of Directors or Certain Officers	→
7/18/25	Other	Material Modification to Rights of Security Holders	→
6/5/25	Vote	Submission of Matters to a Vote of Security Holders	→
2/28/25	Delisting	Notice of Delisting or Failure to Satisfy a Continued Listing Rule	→
↓

Prospectuses & Registrations

28 shown

Filed	Form	Description
2/9/26	S-8 POS	S-8 POS	→
2/9/26	S-8 POS	S-8 POS	→
2/9/26	S-8 POS	S-8 POS	→
2/9/26	S-8 POS	S-8 POS	→
2/9/26	S-8 POS	S-8 POS	→
2/9/26	S-8 POS	S-8 POS	→
↓

Filing History(525 filings)

TypeDateAccessionPeriodSize

15-12G

Feb 19, 2026

0001104659-26-01753415-12G

—

14.2 KB

SCHEDULE 13G/A

Feb 17, 2026

0000080255-26-000277

—

7.4 KB

SCHEDULE 13G/A

Feb 12, 2026

0001037389-26-000010

—

9.0 KB

SCHEDULE 13G/A

Feb 11, 2026

0001957912-26-000011

—

15.8 KB

EFFECT

Feb 10, 2026

9999999995-26-000506

—

1.6 KB

Feb 9, 2026

0001231919-26-000124

Feb 9, 2026

19.9 KB

Feb 9, 2026

0001104659-26-012197OWNERSHIP DOCUMENT

Feb 9, 2026

19.7 KB

Feb 9, 2026

0001104659-26-012196OWNERSHIP DOCUMENT

Feb 9, 2026

21.7 KB

Feb 9, 2026

0001104659-26-012195OWNERSHIP DOCUMENT

Feb 9, 2026

25.3 KB

Feb 9, 2026

0001104659-26-012194OWNERSHIP DOCUMENT

Feb 9, 2026

21.9 KB

Feb 9, 2026

0001104659-26-012193OWNERSHIP DOCUMENT

Feb 9, 2026

19.7 KB

Feb 9, 2026

0001104659-26-012192OWNERSHIP DOCUMENT

Feb 9, 2026

25.1 KB

Feb 9, 2026

0001104659-26-012191OWNERSHIP DOCUMENT

Feb 9, 2026

19.4 KB

Feb 9, 2026

0001104659-26-012190OWNERSHIP DOCUMENT

Feb 9, 2026

14.8 KB

Feb 9, 2026

0001104659-26-012189OWNERSHIP DOCUMENT

Feb 9, 2026

17.7 KB

Feb 9, 2026

0001104659-26-012188OWNERSHIP DOCUMENT

Feb 9, 2026

35.5 KB

Feb 9, 2026

0001104659-26-012184OWNERSHIP DOCUMENT

Feb 9, 2026

19.7 KB

Feb 9, 2026

0001104659-26-012182OWNERSHIP DOCUMENT

Feb 9, 2026

17.2 KB

POS AM

Feb 9, 2026

0001104659-26-012151POS AM

—

28.0 KB

S-8 POS

Feb 9, 2026

0001104659-26-012145S-8 POS

—

39.7 KB

S-8 POS

Feb 9, 2026

0001104659-26-012142S-8 POS

—

39.7 KB

S-8 POS

Feb 9, 2026

0001104659-26-012138S-8 POS

—

39.7 KB

S-8 POS

Feb 9, 2026

0001104659-26-012135S-8 POS

—

39.7 KB

S-8 POS

Feb 9, 2026

0001104659-26-012134S-8 POS

—

39.7 KB

S-8 POS

Feb 9, 2026

0001104659-26-012131S-8 POS

—

39.7 KB

25 filings shown

Filed	Form	Description
4/23/25	DEFA14A	DEFA14A	→
4/23/25	DEF 14A	DEF 14A	→
4/11/25	PRE 14A	PRE 14A	→
4/24/24	DEFA14A	DEFA14A	→
4/24/24	DEF 14A	DEF 14A	→
4/26/23	DEFA14A	DEFA14A	→
↓

Generation Bio Co.

Financials

Earnings Releases (8-K)

News (8-K)

Prospectuses & Registrations

Filing History(525 filings)

Proxies

Ownership

Other Filings

Filed	Form	Description
2/9/26	4	4	→
2/9/26	4	OWNERSHIP DOCUMENT	→
2/9/26	4	OWNERSHIP DOCUMENT	→
2/9/26	4	OWNERSHIP DOCUMENT	→
2/9/26	4	OWNERSHIP DOCUMENT	→
2/9/26	4	OWNERSHIP DOCUMENT	→
↓

Filed	Form	Description
2/19/26	15-12G	15-12G	→
2/17/26	SCHEDULE 13G/A	SCHEDULE 13G/A	→
2/12/26	SCHEDULE 13G/A	SCHEDULE 13G/A	→
2/11/26	SCHEDULE 13G/A	SCHEDULE 13G/A	→
2/10/26	EFFECT	EFFECT	→
2/9/26	POS AM	POS AM	→
↓