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
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 $14.1B AUM 25.52% 1-Year Est. Return
2L
22NW LP Seattle, Washington $146M AUM 29.83% 1-Year Est. Return
GI
GAMCO Investors Greenwich, Connecticut $10.2B AUM 30.27% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $32.4B AUM 17.21% 1-Year Est. Return

Citadel Advisors's FSTR Position: Q4 2025 in Review

Citadel Advisors sold out of Foster (FSTR) in Q4 2025, closing a stake of 20,398 shares — an estimated $550K sold.

Citadel Advisors first reported a position in FSTR in Q3 2013 and held it in 18 quarters. The position peaked at $1.38M in Q3 2015. 95 funds tracked by Wall St. Rank hold FSTR as of Q4 2025.

  • Citadel Advisors reported no remaining Foster position as of Q4 2025 after selling out during the quarter.
  • Citadel Advisors sold 20,398 Foster shares in Q4 2025, an estimated $550K.
  • Citadel Advisors first reported a position in Foster in Q3 2013 and held it in 18 quarters.
  • Citadel Advisors's Foster position peaked at $1.38M in Q3 2015.
  • 95 funds tracked by Wall St. Rank held Foster as of Q4 2025.

Based on Citadel Advisors's 13F filing for Q4 2025, filed 17 Feb 2026.