RENAISSANCE TECHNOLOGIES LLC

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

Symbol: GBIO
Investment type: Equity / COMMON STOCK
Latest Disclosed Shares Owned: 287,614 shares
Security Ownership %: 4.3%

Shares, Excluding Options vs Price

Value, Excluding Options

Renaissance Technologies LLC ownership in Generation Bio Co. COMMON STOCK (GBIO)

12 Feb 2026 - Renaissance Technologies LLC has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 287,614 shares of Generation Bio Co. COMMON STOCK (GBIO). This represents 4.3% ownership of the company. In their previous filing dated 13 Nov 2025, RENAISSANCE TECHNOLOGIES LLC had reported owning 344,263 shares, indicating a decrease of +16%. .

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filing time
Renaissance Technologies LLC	4.3%	-17%	$1,576,125	287,614	-56,649	-16%	$5.48	13G/A	31 Dec 2025	12 Feb 2026, 14:14
Renaissance Technologies LLC	5.1%		$2,106,752	344,263			$6.12	13G	01 Jul 2025	13 Nov 2025, 14:28

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
31 Dec 2025		0%	-0%	$1,633,648	287,614	-56,649	-16%	$5.68	Q4 2025
30 Sep 2025		0%	+0%	$2,106,890	344,263	+344,263	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.