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
Q2 		– Sell
-6,400
Closed -$126K – 13366
2025
Q1 		$126K Buy
6,400
+3,500
+121% +$87.9K ﹤0.01% 11142
2024
Q4 		$78K Buy
2,900
+100
+4% +$2.39K ﹤0.01% 11817
2024
Q3 		$57.2K Sell
2,800
-2,500
-47% -$50.9K ﹤0.01% 11764
2024
Q2 		$114K Buy
+5,300
New +$136K ﹤0.01% 10728
2023
Q4 		– Sell
-10,300
Closed -$195K – 14613
2023
Q3 		$195K Buy
10,300
+8,300
+415% +$137K ﹤0.01% 9964
2023
Q2 		$28.6K Sell
2,000
-800
-29% -$9.85K ﹤0.01% 12406
2023
Q1 		$32.1K Sell
2,800
-2,000
-42% -$23.7K ﹤0.01% 12658
2022
Q4 		$46.5K Buy
+4,800
New +$48.7K ﹤0.01% 12225
2021
Q4 		– Sell
-20,600
Closed -$319K – 14118
2021
Q3 		$319K Buy
+20,600
New +$352K ﹤0.01% 10929
2020
Q4 		– Sell
-21,700
Closed -$291K – 11118
2020
Q3 		$291K Buy
21,700
+10,200
+89% +$142K ﹤0.01% 8185
2020
Q2 		$147K Buy
+11,500
New +$148K ﹤0.01% 8751
2016
Q1 		– Sell
-3,900
Closed -$53K – 7159
2015
Q4 		$53K Buy
3,900
+1,200
+44% +$16.3K ﹤0.01% 7262
2015
Q3 		$33K Sell
2,700
-2,100
-44% -$46.8K ﹤0.01% 7852
2015
Q2 		$166K Sell
4,800
-2,200
-31% -$89.9K ﹤0.01% 6548
2015
Q1 		$332K Buy
7,000
+5,400
+338% +$256K ﹤0.01% 5501
2014
Q4 		$78K Buy
+1,600
New +$78K ﹤0.01% 6859
2013
Q4 		– Sell
-500
Closed -$23K – 7051
2013
Q3 		$23K Buy
+500
New +$22.3K ﹤0.01% 6148

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.