Citadel Advisors
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Citadel Advisors’s One Stop Systems OSS Stock Holding History

Citadel Advisors’s Portfolio OSS Stock Details OSS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$5.08M Buy
279,700
+105,500
+61% +$1.47M ﹤0.01% 4699
2026
Q1 		$1.32M Buy
174,200
+2,300
+1% +$21.4K ﹤0.01% 7034
2025
Q4 		$1.23M Buy
171,900
+149,600
+671% +$885K ﹤0.01% 6936
2025
Q3 		$120K Sell
22,300
-97,000
-81% -$531K ﹤0.01% 11712
2025
Q2 		$424K Buy
119,300
+115,100
+2,740% +$321K ﹤0.01% 9017
2025
Q1 		$9.74K Buy
4,200
+2,300
+121% +$7.7K ﹤0.01% 13580
2024
Q4 		$6.37K Sell
1,900
-3,600
-65% -$9.14K ﹤0.01% 13799
2024
Q3 		$13.1K Buy
5,500
+2,100
+62% +$4.65K ﹤0.01% 13074
2024
Q2 		$8.19K Sell
3,400
-7,800
-70% -$20.8K ﹤0.01% 13205
2024
Q1 		$36.5K Buy
+11,200
New +$30.6K ﹤0.01% 12487
2023
Q3 		– Sell
-30,000
Closed -$86.1K – 14863
2023
Q2 		$86.1K Buy
30,000
+28,700
+2,208% +$75.9K ﹤0.01% 11149
2023
Q1 		$3.22K Buy
+1,300
New +$3.91K ﹤0.01% 14059
2022
Q4 		– Sell
-12,500
Closed -$40K – 15287
2022
Q3 		$40K Buy
+12,500
New +$47.4K ﹤0.01% 11761
2022
Q1 		– Sell
-35,300
Closed -$175K – 14306
2021
Q4 		$175K Buy
+35,300
New +$177K ﹤0.01% 12052

Other funds holding OSS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
BA
Bard Associates Chicago, Illinois $451M AUM 66.6% 1-Year Est. Return
PIP
Palisades Investment Partners Santa Monica, California $352M AUM 76.79% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $108B AUM 37.29% 1-Year Est. Return

Citadel Advisors's OSS Position: Q2 2026 in Review

Citadel Advisors reduced its One Stop Systems (OSS) stake by 80% in Q2 2026, selling an estimated $3.97M and leaving 71,202 shares worth $1.29M. The position accounts for ﹤0.01% of the portfolio, ranked #7566.

Citadel Advisors first reported a position in OSS in Q1 2021 and has held it in 17 quarters since. The position peaked at $4.64M in Q3 2025. 108 funds tracked by Wall St. Rank hold OSS as of Q2 2026.

  • Citadel Advisors held 71,202 shares of One Stop Systems worth $1.29M as of Q2 2026.
  • Citadel Advisors sold 285,474 One Stop Systems shares in Q2 2026, an estimated $3.97M.
  • One Stop Systems made up ﹤0.01% of Citadel Advisors's portfolio in Q2 2026, its #7566 holding.
  • Citadel Advisors first reported a position in One Stop Systems in Q1 2021 and has held it in 17 quarters since.
  • Citadel Advisors's One Stop Systems position peaked at $4.64M in Q3 2025.
  • 108 funds tracked by Wall St. Rank held One Stop Systems as of Q2 2026.

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