CSS LLC’s Generation Bio GBIO Stock Holding History

CSS LLC’s Portfolio GBIO Stock Details GBIO Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-17,464	Closed	-$99.2K	–	1066
2025 Q4	$99.2K	Buy	+17,464	New	+$98.6K	﹤0.01%	850

Other funds holding GBIO

ACM

Accent Capital Management Centerville, Ohio $231M AUM 33.86% 1-Year Est. Return

CSS LLC's GBIO Position: Q1 2026 in Review

CSS LLC sold out of Generation Bio (GBIO) in Q1 2026, closing a stake of 17,464 shares — an estimated $99.2K sold.

CSS LLC first reported a position in GBIO in Q4 2025 and held it in 1 quarter. The position peaked at $99.2K in Q4 2025. 2 funds tracked by Wall St. Rank hold GBIO as of Q1 2026.

CSS LLC reported no remaining Generation Bio position as of Q1 2026 after selling out during the quarter.
CSS LLC sold 17,464 Generation Bio shares in Q1 2026, an estimated $99.2K.
CSS LLC first reported a position in Generation Bio in Q4 2025 and held it in 1 quarter.
CSS LLC's Generation Bio position peaked at $99.2K in Q4 2025.
2 funds tracked by Wall St. Rank held Generation Bio as of Q1 2026.

Based on CSS LLC's 13F filing for Q1 2026, filed 15 May 2026.