CA
GBIO

Cliff Asness’s Generation Bio GBIO Stock Holding History

Cliff Asness’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
2025
Q3 		– Sell
-6,369
Closed -$20.4K – 3507
2025
Q2 		$20.4K Sell
6,369
-2,532
-28% -$9.75K ﹤0.01% 3282
2025
Q1 		$36K Buy
+8,901
New +$62.5K ﹤0.01% 3100
2022
Q4 		– Sell
-3,262
Closed -$173K – 2229
2022
Q3 		$173K Buy
+3,262
New +$204K ﹤0.01% 2065

Other funds holding GBIO

AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $127B AUM 46.06% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $20B AUM 154.41% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return

Cliff Asness's GBIO Position: Q3 2025 in Review

Cliff Asness sold out of Generation Bio (GBIO) in Q3 2025, closing a stake of 6,369 shares — an estimated $20.4K sold.

Cliff Asness first reported a position in GBIO in Q3 2022 and held it in 3 quarters. The position peaked at $173K in Q3 2022. 41 funds tracked by Wall St. Rank hold GBIO as of Q3 2025.

  • Cliff Asness reported no remaining Generation Bio position as of Q3 2025 after selling out during the quarter.
  • Cliff Asness sold 6,369 Generation Bio shares in Q3 2025, an estimated $20.4K.
  • Cliff Asness first reported a position in Generation Bio in Q3 2022 and held it in 3 quarters.
  • Cliff Asness's Generation Bio position peaked at $173K in Q3 2022.
  • 41 funds tracked by Wall St. Rank held Generation Bio as of Q3 2025.

Based on AQR Capital Management's 13F filing for Q3 2025, filed 14 Nov 2025.