Generation Bio Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGS:GBIO Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
08 Dec 23	BuyUS$14,339	Dannielle Appelhans	Individual	8,000	US$1.82
04 Dec 23	BuyUS$477,778	Charles Rowland	Individual	342,960	US$1.50
04 Dec 23	BuyUS$18,000	Dannielle Appelhans	Individual	12,000	US$1.50
01 Dec 23	BuyUS$144,000	Donald Nicholson	Individual	100,000	US$1.44
01 Dec 23	BuyUS$124,778	Anthony Quinn	Individual	88,495	US$1.41

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top 25 shareholders own 84.93% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
12.5%	Atlas Venture L.P.	8,279,484	US$27.0m	0%	2.5%
10.4%	T. Rowe Price Group, Inc.	6,926,174	US$22.6m	-36.8%	no data
8.81%	Moderna, Inc.	5,859,375	US$19.1m	0%	no data
8.05%	FMR LLC	5,352,399	US$17.4m	-36.5%	no data
5.44%	Bellevue Asset Management AG	3,617,080	US$11.8m	0%	0.12%
4.77%	BlackRock, Inc.	3,168,415	US$10.3m	-5.53%	no data
4.23%	Artal Group S.A.	2,814,191	US$9.2m	0%	0.24%
3.84%	The Vanguard Group, Inc.	2,552,251	US$8.3m	9.13%	no data
3.8%	Bank of America Corporation, Asset Management Arm	2,527,862	US$8.2m	398%	no data
3.08%	EcoR1 Capital, LLC	2,046,867	US$6.7m	0%	0.18%
2.75%	Cameron McDonough	1,824,920	US$5.9m	1.97%	no data
2.44%	PFM Health Sciences, LP	1,622,487	US$5.3m	-35.5%	0.29%
1.85%	Deutsche Asset & Wealth Management	1,232,316	US$4.0m	6,320%	no data
1.62%	Geode Capital Management, LLC	1,077,963	US$3.5m	6.54%	no data
1.6%	Morgan Stanley, Investment Banking and Brokerage Investments	1,061,503	US$3.5m	117%	no data
1.39%	State Street Global Advisors, Inc.	921,987	US$3.0m	0.9%	no data
1.34%	Goldman Sachs Group, Investment Banking and Securities Investments	892,822	US$2.9m	110%	no data
1.3%	UBS Asset Management AG	867,399	US$2.8m	118%	no data
1.13%	Millennium Management LLC	752,745	US$2.5m	2,350%	no data
1.04%	Renaissance Technologies LLC	689,400	US$2.2m	119%	no data
1.03%	Dimensional Fund Advisors LP	683,100	US$2.2m	-10.3%	no data
0.8%	Charles Rowland	534,757	US$1.7m	179%	no data
0.58%	SEI Investments Company	386,861	US$1.3m	37.7%	no data
0.58%	Douglas Kerr	385,628	US$1.3m	4.11%	no data
0.57%	Los Angeles Capital Management LLC	381,661	US$1.2m	38.4%	no data