PRICE T ROWE ASSOCIATES INC /MD/

Holdings History for Generation Bio Co. - COMMON STOCK (GBIO)

Symbol: GBIO
Investment type: Equity / COMMON STOCK
Latest Disclosed Shares Owned: 209,641 shares
Security Ownership %: 3.1%

Shares, Excluding Options vs Price

Value, Excluding Options

T. Rowe Price Associates, Inc. ownership in Generation Bio Co. COMMON STOCK (GBIO)

17 Feb 2026 - T. Rowe Price Associates, Inc. has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 209,641 shares of Generation Bio Co. COMMON STOCK (GBIO). This represents 3.1% ownership of the company. In their previous filing dated 14 Nov 2025, PRICE T ROWE ASSOCIATES INC /MD/ had reported owning 576,789 shares, indicating a decrease of +64%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
T. Rowe Price Associates, Inc.	3.1%	-61%	$1,148,833	209,641	-367,148	-64%	$5.48	13G/A	31 Dec 2025	17 Feb 2026, 10:26
T. Rowe Price Associates, Inc.	8.6%	-31%	$3,529,718	576,789	-7,885,822	-93%	$6.12	13G/A	30 Sep 2025	14 Nov 2025, 12:19
T. Rowe Price Associates, Inc.	13%			8,462,611			$5.34	13G/A	30 Jun 2025	14 Aug 2025, 13:07

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025		0%	-0%	$1,191,000	209,641	-367,148	-64%	$5.68	Q4 2025
30 Sep 2025		0%	+0%	$3,531,000	576,789	+576,789	NEW	$6.12	Q3 2025

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.