AllianceBernstein
GBIO

AllianceBernstein’s Generation Bio GBIO Stock Holding History

AllianceBernstein’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
Q2 		– Sell
-7,216
Closed -$29.2K – 3265
2025
Q1 		$29.2K Hold
7,216
– – ﹤0.01% 3167
2024
Q4 		$76.5K Hold
7,216
– – ﹤0.01% 3152
2024
Q3 		$178K Hold
7,216
– – ﹤0.01% 3058
2024
Q2 		$203K Buy
7,216
+687
+11% +$22.3K ﹤0.01% 3031
2024
Q1 		$266K Hold
6,529
– – ﹤0.01% 2844
2023
Q4 		$108K Sell
6,529
-554
-8% -$9.66K ﹤0.01% 3060
2023
Q3 		$268K Buy
7,083
+101
+1% +$4.78K ﹤0.01% 2852
2023
Q2 		$384K Buy
6,982
+1,401
+25% +$64.3K ﹤0.01% 2765
2023
Q1 		$240K Sell
5,581
-110
-2% -$5.32K ﹤0.01% 2855
2022
Q4 		$224K Buy
5,691
+390
+7% +$20.5K ﹤0.01% 2974
2022
Q3 		$281K Buy
5,301
+290
+6% +$18.1K ﹤0.01% 2896
2022
Q2 		$329K Buy
5,011
+400
+9% +$26.1K ﹤0.01% 2844
2022
Q1 		$338K Buy
4,611
+10
+0.2% +$579 ﹤0.01% 2836
2021
Q4 		$326K Hold
4,601
– – ﹤0.01% 2917
2021
Q3 		$1.15M Hold
4,601
– – ﹤0.01% 2439
2021
Q2 		$1.24M Hold
4,601
– – ﹤0.01% 2440
2021
Q1 		$1.31M Buy
+4,601
New +$1.47M ﹤0.01% 2295

Other funds holding GBIO

T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

AllianceBernstein's GBIO Position: Q2 2025 in Review

AllianceBernstein sold out of Generation Bio (GBIO) in Q2 2025, closing a stake of 7,216 shares — an estimated $29.2K sold.

AllianceBernstein first reported a position in GBIO in Q1 2021 and held it in 17 quarters. The position peaked at $1.31M in Q1 2021. 61 funds tracked by Wall St. Rank hold GBIO as of Q2 2025.

  • AllianceBernstein reported no remaining Generation Bio position as of Q2 2025 after selling out during the quarter.
  • AllianceBernstein sold 7,216 Generation Bio shares in Q2 2025, an estimated $29.2K.
  • AllianceBernstein first reported a position in Generation Bio in Q1 2021 and held it in 17 quarters.
  • AllianceBernstein's Generation Bio position peaked at $1.31M in Q1 2021.
  • 61 funds tracked by Wall St. Rank held Generation Bio as of Q2 2025.

Based on AllianceBernstein's 13F filing for Q2 2025, filed 14 Aug 2025.