Generation Bio Co. SEC Filings

Filed On	Filing
14 May 2026	SCHEDULE 13G/A
19 Feb 2026	15-12G
17 Feb 2026	SCHEDULE 13G/A
12 Feb 2026	SCHEDULE 13G/A
11 Feb 2026	SCHEDULE 13G/A
10 Feb 2026	EFFECT
09 Feb 2026	Form 4: Atlas Venture Fund X, L.p., 10% owner and 5 others Disposed of 827,946 shares (Tender Offer)
09 Feb 2026	Form 4: Stehman-Breen Catherine, Director Disposed of 4,752 shares (Tender Offer) · Disposed of 20,120 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Rowland Charles A Jr, Director Disposed of 53,475 shares (Tender Offer) · Disposed of 24,366 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Rhodes Jason P, Director Disposed of 827,946 shares (Tender Offer) · Disposed of 20,120 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Quinn Anthony G., Director Disposed of 37,211 shares (Tender Offer) · Disposed of 20,120 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Nicholson Donald William, Director Disposed of 21,357 shares (Tender Offer) · Disposed of 20,120 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Mcdonough Geoff, Director Disposed of 188,638 shares (Tender Offer) · Disposed of 264,213 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Jonas Jeffrey M, Director Disposed of 24,366 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Howze Yalonda, INTERIM CEO AND PRESIDENT Disposed of 3,759 shares (Tender Offer) · Disposed of 55,325 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Cooper Ronald Harold Wilfred, Director Disposed of 950 shares (Tender Offer) · Disposed of 16,420 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Conway Kevin John, CHIEF FINANCIAL OFFICER Disposed of 2,072 shares (Tender Offer) · Disposed of 56,045 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Christensen Gustav, Director Disposed of 13,142 shares (Tender Offer) · Disposed of 20,120 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	Form 4: Appelhans Dannielle, Director Disposed of 1,999 shares (Tender Offer) · Disposed of 15,340 Stock Option (right to buy) (Disposition to Issuer)
09 Feb 2026	POS AM

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