Jane Street
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Jane Street’s Foster FSTR Stock Holding History

Jane Street’s Portfolio FSTR Stock Details FSTR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-12,571
Closed -$351K – 12073
2026
Q1 		$351K Sell
12,571
-5,002
-28% -$148K ﹤0.01% 8874
2025
Q4 		$474K Sell
17,573
-325
-2% -$8.77K ﹤0.01% 7817
2025
Q3 		$482K Buy
+17,898
New +$443K ﹤0.01% 7954
2024
Q4 		– Sell
-14,907
Closed -$305K – 9806
2024
Q3 		$305K Buy
+14,907
New +$303K ﹤0.01% 8015
2024
Q2 		– Sell
-121,803
Closed -$3.33M – 9640
2024
Q1 		$3.33M Buy
121,803
+77,155
+173% +$1.82M ﹤0.01% 3234
2023
Q4 		$982K Buy
+44,648
New +$880K ﹤0.01% 5598

Other funds holding FSTR

BIP
Brandes Investment Partners La Jolla, California $14.3B AUM 23.11% 1-Year Est. Return
GI
GAMCO Investors Greenwich, Connecticut $11.1B AUM 41.79% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $84.2B AUM 55.88% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
HIM
Hillsdale Investment Management Toronto, Ontario, Canada $4.39B AUM 72.96% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Jane Street's FSTR Position: Q2 2026 in Review

Jane Street sold out of Foster (FSTR) in Q2 2026, closing a stake of 12,571 shares — an estimated $351K sold.

Jane Street first reported a position in FSTR in Q4 2023 and held it in 6 quarters. The position peaked at $3.33M in Q1 2024. 134 funds tracked by Wall St. Rank hold FSTR as of Q2 2026.

  • Jane Street reported no remaining Foster position as of Q2 2026 after selling out during the quarter.
  • Jane Street sold 12,571 Foster shares in Q2 2026, an estimated $351K.
  • Jane Street first reported a position in Foster in Q4 2023 and held it in 6 quarters.
  • Jane Street's Foster position peaked at $3.33M in Q1 2024.
  • 134 funds tracked by Wall St. Rank held Foster as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.