HOWZE YALONDA (INTERIM CEO AND PRESIDENT) reported 1 transaction at GENERATION BIO CO.

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

HOWZE YALONDA

Filed: 2/9/2026ACC: 0001104659-26-012190

InsiderHOWZE YALONDACIK 1828153

→

IssuerGENERATION BIO CO.CIK 1733294

Officer· INTERIM CEO AND PRESIDENT

Since Feb 2026

-59.08K

Net shares

Net seller

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

59.08K disposed

Non-Derivative Transactions1

Common Stock

Direct

U · U

−3.76K

Price / share

—

Trade value

—

% of position

New position

2/9/2026

3.76K→0.00

Total

Net shares

−3.76K

Net value

$0.00

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	2/9/2026	U · U	−3.76K	—	—	New position	3.76K	0.00
Total			−3.76K		$0.00

Derivative Transactions4

Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

10.71K shares

−10.71K

Strike price

39.70

Held after

0.00

Exercisable

—

2/9/2026

Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

11.88K shares

−11.88K

Strike price

18.60

Held after

0.00

Exercisable

—

2/9/2026

Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

25.10K shares

−25.10K

Strike price

9.255

Held after

0.00

Exercisable

—

2/9/2026

Stock Option (right to buy)

Direct

D · Disposition

Converts to

Common Stock

7.63K shares

−7.63K

Strike price

13.90

Held after

0.00

Exercisable

—

2/9/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable
Stock Option (right to buy) Direct	Common Stock10.71K shares	2/9/2026	D · Disposition	−10.71K	39.70	—
Stock Option (right to buy) Direct	Common Stock11.88K shares	2/9/2026	D · Disposition	−11.88K	18.60	—
Stock Option (right to buy) Direct	Common Stock25.10K shares	2/9/2026	D · Disposition	−25.10K	9.255	—
Stock Option (right to buy) Direct	Common Stock7.63K shares	2/9/2026	D · Disposition	−7.63K	13.90	—