MCDONOUGH GEOFF

PrivateCIK: 1732701
Location

CAMBRIDGE, MA

MCDONOUGH GEOFF (See Remarks) reported 3 transactions at GENERATION BIO CO.

Review the transaction codes below to understand the nature of each event.

InsiderMCDONOUGH GEOFFCIK 1732701
IssuerGENERATION BIO CO.CIK 1733294
DirectorOfficer10% Owner· See Remarks
Since Jun 2020
-452.85K
Net shares
Net seller
$0.00
Total acquired
0
Open market trades
0B · 0S
10
Total transactions
452.85K disposed
Non-Derivative Transactions3

Common Stock

Direct
U · U

Shares

138.49K

Price / share

Trade value

% of position

New position
2/9/2026
138.49K0.00

Common Stock

Indirect
U · U

Shares

22.65K

Price / share

Trade value

% of position

New position
2/9/2026
22.65K0.00

Common Stock

Indirect
U · U

Shares

27.50K

Price / share

Trade value

% of position

New position
2/9/2026
27.50K0.00
Total

Net shares

188.64K

Net value

$0.00

Derivative Transactions7

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

19.90K shares

Shares

19.90K

Strike price

51.576

Held after

0.00

Exercisable

2/9/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

25.10K shares

Shares

25.10K

Strike price

302.50

Held after

0.00

Exercisable

2/9/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

37.50K shares

Shares

37.50K

Strike price

64.90

Held after

0.00

Exercisable

2/9/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

50.62K shares

Shares

50.62K

Strike price

18.60

Held after

0.00

Exercisable

2/9/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

90.17K shares

Shares

90.17K

Strike price

9.255

Held after

0.00

Exercisable

2/9/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

16.87K shares

Shares

16.87K

Strike price

47.05

Held after

0.00

Exercisable

2/9/2026

Stock Option (right to buy)

Direct
D · Disposition
Converts to

Common Stock

24.05K shares

Shares

24.05K

Strike price

13.90

Held after

0.00

Exercisable

2/9/2026
MCDONOUGH GEOFF — Insider Transaction (Form 4) Filed Feb 9, 2026 | Finecho