GBIO Insider Holders & Insider Ownership

List of insiders holdings for Generation Bio Co.:

Shares directly owned by the insider.
Shares indirectly owned by the insider.
Total shares owned by the insider (sum of shares directly and indirectly owned).
Total market value if available.
Shares are not adjusted for stock split.

"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#	Insider Holder Name	Report Date Time	Shares Owned Directly Indirectly	Total Shares Owned	Filing
1	ATLAS VENTURE ASSOCIATES X L.P. Atlas Venture Associates X LLC Atlas Venture Opportunity Fund I L.P. Atlas Venture Associates Opportunity I LLC 10% Owner	2021-09-29 19:15:51	0 8,279,484	8,279,484	Form 4
2	Atlas Venture Fund X L.P. Atlas Venture Opportunity Fund I L.P. 10% Owner	2024-02-09 16:05:55	7,111,939 0	7,111,939	Form 13G
3	Seybold William Spokes Andrew J M Warren John R. WEHRLY MARK C Member of Group Owning 10% 10% Owner	2020-06-17 16:59:49	1,918,819 4,956,457	6,875,276	Form 4
4	Zone Healthcare Holdings LLC FARALLON CAPITAL MANAGEMENT LLC FARALLON PARTNERS L L C Dreyfuss Philip D Fisch Michael B. FRIED RICHARD B Kim David T Linn Michael G PATEL RAJIV A Roberts Thomas G. Jr. Member of Group Owning 10% 10% Owner	2022-02-03 09:23:18	3,500,000 0	3,500,000	Form 13G
5	Invus Public Equities L.P. Minne Pascal Artal International S.C.A. Artal International Management S.A. Artal Group S.A. Westend S.A. Stichting Administratiekantoor Westend Artal Treasury Ltd Invus Public Equities Advisors LLC 10% Owner	2022-02-11 06:33:31	2,814,191 0	2,814,191	Form 13G
6	Wellington Biomedical Innovation Master Investors (Cayman) I L.P. 10% Owner	2020-06-18 18:02:24	2,112,546 0	2,112,546	Form 4
7	MCDONOUGH GEOFF PRESIDENT AND CEO	2025-04-17 16:05:18	1,386,575 501,462	1,888,037	Form 4
8	Casdin Capital LLC Casdin Eli 10% Owner	2020-06-18 17:29:31	0 1,611,215	1,611,215	Form 4
9	Flynn James E Deerfield Mgmt L.P. DEERFIELD MANAGEMENT COMPANY L.P. (SERIES C) DEERFIELD PARTNERS L.P. Possible Member of 10% Group 10% Owner	2020-06-16 14:50:41	0 1,186,215	1,186,215	Form 4
10	Kerr Douglas CHIEF MEDICAL OFFICER	2024-01-31 16:30:15	385,628 0	385,628	Form 4
11	Quinn Anthony G. Director	2025-01-14 16:05:17	299,286 0	299,286	Form 4
12	Samayoa Phillip CHIEF SCIENTIFIC OFFICER	2025-04-17 16:05:20	136,542 0	136,542	Form 4
13	Nicholson Donald William Director	2024-06-10 16:05:14	60,000 0	60,000	Form 4
14	Appelhans Dannielle Director	2024-06-10 16:05:08	60,000 0	60,000	Form 4
15	Stehman-Breen Catherine Director	2024-06-10 16:05:28	60,000 0	60,000	Form 4
16	Rowland Charles A Jr Director	2024-06-10 16:05:26	60,000 0	60,000	Form 4
17	Christensen Gustav Director	2024-06-10 16:05:17	60,000 0	60,000	Form 4
18	Rhodes Jason P Director	2024-06-10 16:05:29	60,000 0	60,000	Form 4
19	Cooper Ronald Harold Wilfred Director	2024-06-10 16:05:19	60,000 0	60,000	Form 4
20	JONAS JEFFREY M Director	2024-06-10 16:05:17	60,000 0	60,000	Form 4
21	Zimmermann Tracy CHIEF DEVELOPMENT OFFICER	2024-01-31 16:30:26	49,164 0	49,164	Form 4
22	Howze Yalonda CHIEF LEGAL OFFICER	2025-04-17 16:05:10	45,511 0	45,511	Form 4
23	Paone Antoinette CHIEF OPERATING OFFICER	2025-04-17 16:05:13	34,222 0	34,222	Form 4
24	ATLAS VENTURE ASSOCIATES X L.P. Atlas Venture Associates X LLC Atlas Venture Associates Opportunity I L.P. Atlas Venture Associates Opportunity I LLC 10% Owner	2021-06-23 20:26:27	30,950 666	31,616	Form 4
25	DiPalma Stephen J. See Remarks	2020-06-11 20:49:41	28,307 0	28,307	Form 3
26	Conway Kevin John Chief Financial Officer	2025-04-17 16:05:06	21,966 0	21,966	Form 4
27	Stanton Matthew CHIEF SCIENTIFIC OFFICER	2025-01-10 16:05:06	0 0	0	Form 4
28	Norkunas Matthew CHIEF FINANCIAL OFFICER	2025-01-10 16:05:07	0 0	0	Form 4
29	Angelino Mark D. CHIEF OPERATING OFFICER	2021-02-05 17:00:22	0 0	0	Form 4

Insider Holders & Insider Ownership - Generation Bio Co. (GBIO)