Insider Transactions Reported by 20 Insiders of Generation Bio Co.

Symbol
GBIO on Nasdaq
Location
Cambridge, MA

There are no Buy or Sell transactions made by insiders since 18 Mar 2025

Generation Bio Co. executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
Matthew Stanton Chief Scientific Officer $1,372,339 10 Jan 2025
Matthew Norkunas Chief Financial Officer $880,215 10 Jan 2025
Phillip Samayoa Chief Scientific Officer $835,200 31 Oct 2025
Antoinette Paone Chief Operating Officer $766,026 31 Oct 2025
Douglas Kerr Chief Medical Officer $732,693 29 Jan 2024
Charles A. Rowland Jr. Director $275,400 09 Feb 2026
Gustav Christensen Director $275,400 09 Feb 2026
Jason P. Rhodes Director $275,400 09 Feb 2026
Dannielle Appelhans Director $275,400 09 Feb 2026
Donald William Nicholson Director $275,400 09 Feb 2026
Ronald Harold Wilfred Cooper Director $275,400 09 Feb 2026
Catherine Stehman-Breen Director $275,400 09 Feb 2026
Jeffrey M. Jonas Director $275,400 09 Feb 2026
Anthony G. Quinn Director $275,400 09 Feb 2026
Tracy Zimmermann Chief Development Officer $93,412 29 Jan 2024
Geoff Mcdonough Director $13,576 09 Feb 2026
Yalonda Howze Interim Ceo And President $9,847 09 Feb 2026
Kevin John Conway Chief Financial Officer $3,647 09 Feb 2026
ATLAS VENTURE ASSOCIATES X, L.P. 10%+ Owner $1,161 27 Sep 2021
Atlas Venture Fund X, L.P. 10%+ Owner $0 09 Feb 2026

Recent Insider Transactions by Companies or Individuals for Generation Bio Co.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
Atlas Venture Fund X, L.P. GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -116,753 0 09 Feb 2026 See footnote
Atlas Venture Fund X, L.P. GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -711,193 0 09 Feb 2026 Direct
Catherine Stehman-Breen GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -4,752 0 09 Feb 2026 Direct
Catherine Stehman-Breen GBIO Stock Option (right to buy) Disposed to Issuer -100% -20,120 0 09 Feb 2026 Direct
Charles A. Rowland Jr. GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -53,475 0 09 Feb 2026 Direct
Charles A. Rowland Jr. GBIO Stock Option (right to buy) Disposed to Issuer -100% -24,366 0 09 Feb 2026 Direct
Jason P. Rhodes GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -827,946 0 09 Feb 2026 See Footnote
Jason P. Rhodes GBIO Stock Option (right to buy) Disposed to Issuer -100% -20,120 0 09 Feb 2026 Direct
Anthony G. Quinn GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -7,283 0 09 Feb 2026 By Quinn Family Irrevocable Trust of 2021
Anthony G. Quinn GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -29,928 0 09 Feb 2026 Direct
Anthony G. Quinn GBIO Stock Option (right to buy) Disposed to Issuer -100% -20,120 0 09 Feb 2026 Direct
Donald William Nicholson GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -21,357 0 09 Feb 2026 Direct
Donald William Nicholson GBIO Stock Option (right to buy) Disposed to Issuer -100% -20,120 0 09 Feb 2026 Direct
Geoff Mcdonough GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -27,500 0 09 Feb 2026 By 2020 Trust
Geoff Mcdonough GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -22,646 0 09 Feb 2026 By 2018 Trust
Geoff Mcdonough GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -138,492 0 09 Feb 2026 Direct
Geoff Mcdonough GBIO Stock Option (right to buy) Disposed to Issuer -100% -264,213 0 09 Feb 2026 Direct
Jeffrey M. Jonas GBIO Stock Option (right to buy) Disposed to Issuer -100% -24,366 0 09 Feb 2026 Direct
Yalonda Howze GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -3,759 0 09 Feb 2026 Direct
Yalonda Howze GBIO Stock Option (right to buy) Disposed to Issuer -100% -55,325 0 09 Feb 2026 Direct
Ronald Harold Wilfred Cooper GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -950 0 09 Feb 2026 Direct
Ronald Harold Wilfred Cooper GBIO Stock Option (right to buy) Disposed to Issuer -100% -16,420 0 09 Feb 2026 Direct
Kevin John Conway GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -2,072 0 09 Feb 2026 Direct
Kevin John Conway GBIO Stock Option (right to buy) Disposed to Issuer -100% -56,045 0 09 Feb 2026 Direct
Gustav Christensen GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -13,142 0 09 Feb 2026 Direct
Gustav Christensen GBIO Stock Option (right to buy) Disposed to Issuer -100% -20,120 0 09 Feb 2026 Direct
Dannielle Appelhans GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -736 0 09 Feb 2026 By Spouse
Dannielle Appelhans GBIO Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -1,263 0 09 Feb 2026 Direct
Dannielle Appelhans GBIO Stock Option (right to buy) Disposed to Issuer -100% -15,340 0 09 Feb 2026 Direct
Kevin John Conway GBIO Common Stock Tax liability -3.36% -72 2,072 02 Feb 2026 Direct
Kevin John Conway GBIO Common Stock Options Exercise 12.3% 235 2,144 02 Feb 2026 Direct
Kevin John Conway GBIO Restricted Stock Units Options Exercise -100% -235 0 02 Feb 2026 Direct
Yalonda Howze GBIO Common Stock Tax liability -11.6% -495 3,759 02 Feb 2026 Direct
Yalonda Howze GBIO Common Stock Options Exercise 64.8% 1,673 4,254 02 Feb 2026 Direct
Yalonda Howze GBIO Restricted Stock Units Options Exercise -100% -1,673 0 02 Feb 2026 Direct
Geoff Mcdonough GBIO Common Stock Tax liability -0.4% -550 138,492 02 Feb 2026 Direct
Geoff Mcdonough GBIO Common Stock Options Exercise 1.15% 1,582 139,042 02 Feb 2026 Direct
Geoff Mcdonough GBIO Restricted Stock Units Options Exercise -100% -1,582 0 02 Feb 2026 Direct
Kevin John Conway GBIO Common Stock Tax liability -0.88% -17 1,909 15 Jan 2026 Direct
Kevin John Conway GBIO Common Stock Options Exercise 3.16% 59 1,926 15 Jan 2026 Direct
Kevin John Conway GBIO Restricted Stock Units Options Exercise -20.1% -59 235 15 Jan 2026 Direct
Geoff Mcdonough GBIO Common Stock Tax liability -0.1% -137 137,460 15 Jan 2026 Direct
Geoff Mcdonough GBIO Common Stock Options Exercise 0.29% 395 137,597 15 Jan 2026 Direct
Geoff Mcdonough GBIO Restricted Stock Units Options Exercise 33.3% 395 1,582 15 Jan 2026 Direct
Yalonda Howze GBIO Common Stock Tax liability -3.69% -99 2,581 15 Jan 2026 Direct
Yalonda Howze GBIO Common Stock Options Exercise 14.3% 335 2,680 15 Jan 2026 Direct
Yalonda Howze GBIO Restricted Stock Units Options Exercise -16.7% -335 1,673 15 Jan 2026 Direct
Geoff Mcdonough GBIO Common Stock Tax liability -0.21% -293 137,202 31 Oct 2025 Direct
Geoff Mcdonough GBIO Common Stock Options Exercise 0.48% 659 137,495 31 Oct 2025 Direct
Geoff Mcdonough GBIO Restricted Stock Units Options Exercise -25% -659 1,977 31 Oct 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.