Russell Investments Group
GBIO

Russell Investments Group’s Generation Bio GBIO Stock Holding History

Russell Investments Group’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
-270
Closed -$865 – 4176
2025
Q2 		$865 Hold
270
– – ﹤0.01% 3687
2025
Q1 		$1.09K Sell
270
-312
-54% -$2.19K ﹤0.01% 3590
2024
Q4 		$6.16K Buy
582
+76
+15% +$1.35K ﹤0.01% 3238
2024
Q3 		$12.5K Buy
506
+15
+3% +$397 ﹤0.01% 3042
2024
Q2 		$13.9K Buy
+491
New +$16K ﹤0.01% 3008
2023
Q3 		– Sell
-207
Closed -$11.4K – 3560
2023
Q2 		$11.4K Hold
207
– – ﹤0.01% 2942
2023
Q1 		$8.89K Hold
207
– – ﹤0.01% 2902
2022
Q4 		$8.12K Sell
207
-2,113
-91% -$111K ﹤0.01% 2850
2022
Q3 		$122K Buy
+2,320
New +$145K ﹤0.01% 2638

Other funds holding GBIO

AVLSA
Atlas Venture Life Science Advisors Cambridge, Massachusetts $790M AUM 223.66% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
SL
Siren LLC Greenwich, Connecticut $3.61B AUM 203.3% 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 $100B AUM 35.1% 1-Year Est. Return
BBA
Baker Bros. Advisors New York $17.4B AUM 131.5% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Russell Investments Group's GBIO Position: Q3 2025 in Review

Russell Investments Group sold out of Generation Bio (GBIO) in Q3 2025, closing a stake of 270 shares — an estimated $865 sold.

Russell Investments Group first reported a position in GBIO in Q3 2022 and held it in 9 quarters. The position peaked at $122K in Q3 2022. 41 funds tracked by Wall St. Rank hold GBIO as of Q3 2025.

  • Russell Investments Group reported no remaining Generation Bio position as of Q3 2025 after selling out during the quarter.
  • Russell Investments Group sold 270 Generation Bio shares in Q3 2025, an estimated $865.
  • Russell Investments Group first reported a position in Generation Bio in Q3 2022 and held it in 9 quarters.
  • Russell Investments Group's Generation Bio position peaked at $122K in Q3 2022.
  • 41 funds tracked by Wall St. Rank held Generation Bio as of Q3 2025.

Based on Russell Investments Group's 13F filing for Q3 2025, filed 13 Nov 2025.