ProShare Advisors
GBIO

ProShare Advisors’s Generation Bio GBIO Stock Holding History

ProShare Advisors’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
-1,071
Closed -$4.34K – 2116
2025
Q1 		$4.34K Sell
1,071
-322
-23% -$2.26K ﹤0.01% 2077
2024
Q4 		$14.8K Buy
+1,393
New +$24.8K ﹤0.01% 2260
2023
Q4 		– Sell
-1,019
Closed -$38.6K – 1959
2023
Q3 		$38.6K Buy
1,019
+5
+0.5% +$237 ﹤0.01% 1736
2023
Q2 		$55.8K Buy
+1,014
New +$46.5K ﹤0.01% 1762
2023
Q1 		– Sell
-1,110
Closed -$43.6K – 1839
2022
Q4 		$43.6K Buy
1,110
+85
+8% +$4.46K ﹤0.01% 1750
2022
Q3 		$54K Buy
+1,025
New +$64.1K ﹤0.01% 1656
2022
Q2 		– Sell
-1,412
Closed -$103K – 1919
2022
Q1 		$103K Sell
1,412
-344
-20% -$19.9K ﹤0.01% 2024
2021
Q4 		$124K Sell
1,756
-18
-1% -$3.14K ﹤0.01% 2161
2021
Q3 		$445K Sell
1,774
-380
-18% -$91K ﹤0.01% 1279
2021
Q2 		$579K Buy
2,154
+323
+18% +$96.6K ﹤0.01% 1427
2021
Q1 		$521K Buy
1,831
+841
+85% +$269K ﹤0.01% 1405
2020
Q4 		$281K Buy
+990
New +$318K ﹤0.01% 1657

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

ProShare Advisors's GBIO Position: Q2 2025 in Review

ProShare Advisors sold out of Generation Bio (GBIO) in Q2 2025, closing a stake of 1,071 shares — an estimated $4.34K sold.

ProShare Advisors first reported a position in GBIO in Q4 2020 and held it in 12 quarters. The position peaked at $579K in Q2 2021. 61 funds tracked by Wall St. Rank hold GBIO as of Q2 2025.

  • ProShare Advisors reported no remaining Generation Bio position as of Q2 2025 after selling out during the quarter.
  • ProShare Advisors sold 1,071 Generation Bio shares in Q2 2025, an estimated $4.34K.
  • ProShare Advisors first reported a position in Generation Bio in Q4 2020 and held it in 12 quarters.
  • ProShare Advisors's Generation Bio position peaked at $579K in Q2 2021.
  • 61 funds tracked by Wall St. Rank held Generation Bio as of Q2 2025.

Based on ProShare Advisors's 13F filing for Q2 2025, filed 7 Aug 2025.