Citadel Advisors
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Citadel Advisors’s Foster FSTR Stock Holding History

Citadel Advisors’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 		$1.44M Buy
+31,932
New +$1.19M ﹤0.01% 7309
2025
Q4 		– Sell
-20,398
Closed -$550K – 13122
2025
Q3 		$550K Sell
20,398
-24,805
-55% -$614K ﹤0.01% 8901
2025
Q2 		$989K Sell
45,203
-6,554
-13% -$128K ﹤0.01% 7116
2025
Q1 		$1.02M Buy
51,757
+21,282
+70% +$535K ﹤0.01% 6917
2024
Q4 		$820K Sell
30,475
-3,119
-9% -$74.6K ﹤0.01% 7460
2024
Q3 		$686K Buy
33,594
+5,120
+18% +$104K ﹤0.01% 7587
2024
Q2 		$613K Buy
+28,474
New +$732K ﹤0.01% 7626
2023
Q4 		– Sell
-13,127
Closed -$248K – 14614
2023
Q3 		$248K Sell
13,127
-2,219
-14% -$36.7K ﹤0.01% 9513
2023
Q2 		$219K Buy
15,346
+3,030
+25% +$37.3K ﹤0.01% 9688
2023
Q1 		$141K Sell
12,316
-18,158
-60% -$215K ﹤0.01% 10740
2022
Q4 		$295K Buy
+30,474
New +$309K ﹤0.01% 9359
2021
Q3 		– Sell
-16,456
Closed -$281K – 14064
2021
Q2 		$307K Sell
16,456
-10,404
-39% -$183K ﹤0.01% 11199
2021
Q1 		$481K Buy
+26,860
New +$450K ﹤0.01% 9756
2016
Q1 		– Sell
-3,905
Closed -$53K – 7160
2015
Q4 		$53K Sell
3,905
-108,379
-97% -$1.48M ﹤0.01% 7263
2015
Q3 		$1.38M Buy
112,284
+98,701
+727% +$2.2M ﹤0.01% 3393
2015
Q2 		$470K Buy
13,583
+13,426
+8,552% +$549K ﹤0.01% 5070
2015
Q1 		$7K Sell
157
-1,788
-92% -$84.8K ﹤0.01% 8267
2014
Q4 		$94K Buy
+1,945
New +$94.8K ﹤0.01% 6688
2013
Q4 		– Sell
-969
Closed -$44K – 7052
2013
Q3 		$44K Buy
+969
New +$43.2K ﹤0.01% 5860

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

Citadel Advisors's FSTR Position: Q2 2026 in Review

Citadel Advisors opened a new position in Foster (FSTR) in Q2 2026: 31,932 shares worth $1.44M. The stake represents ﹤0.01% of the portfolio and ranks #7309 among its holdings. This is a return to the name: Citadel Advisors previously reported a position in FSTR as recently as Q3 2025.

Citadel Advisors first reported a position in FSTR in Q3 2013 and has held it in 19 quarters since. 134 funds tracked by Wall St. Rank hold FSTR as of Q2 2026.

  • Citadel Advisors held 31,932 shares of Foster worth $1.44M as of Q2 2026.
  • Foster was a new Citadel Advisors position in Q2 2026.
  • Foster made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #7309 holding.
  • Citadel Advisors first reported a position in Foster in Q3 2013 and has held it in 19 quarters since.
  • 134 funds tracked by Wall St. Rank held Foster as of Q2 2026.

Based on Citadel Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.