Renaissance Technologies Llc

13F Holdings History for Generation Bio Co. - Common Stock (GBIO)

Symbol: GBIO on Nasdaq
Investment type: Equity / Common Stock
Latest Disclosed Ownership: 344K shares
Security Ownership: 5.11%

Shares, Excluding Options vs Price

Value, Excluding Options

Renaissance Technologies LLC ownership in Generation Bio Co. Common Stock (GBIO)

2025-11-13 - Renaissance Technologies LLC has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 344K shares of Generation Bio Co. Common Stock (GBIO). This represents 5.11% percent ownership of the company.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
Renaissance Technologies LLC	5.11%		$2.06M	344K			$5.98	13G	7/1/2025	13 Nov 2025 14:28:17

Holdings date	Option	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
9/30/2025		0%	+0%	$2.11M	344K	+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.