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Thompson Siegel & Walmsley’s One Stop Systems OSS Stock Holding History

Thompson Siegel & Walmsley’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
Q1 		$734K Sell
96,963
-56,161
-37% -$524K 0.01% 334
2025
Q4 		$1.1M Sell
153,124
-46,876
-23% -$277K 0.02% 307
2025
Q3 		$1.07M Buy
+200,000
New +$1.09M 0.02% 309

Other funds holding OSS

VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
BA
Bard Associates Chicago, Illinois $398M AUM 54.32% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Citadel Advisors
Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Thompson Siegel & Walmsley's OSS Position: Q1 2026 in Review

Thompson Siegel & Walmsley reduced its One Stop Systems (OSS) stake by 37% in Q1 2026, selling an estimated $524K and leaving 96,963 shares worth $734K. The position accounts for 0.01% of the portfolio, ranked #334.

Thompson Siegel & Walmsley first reported a position in OSS in Q3 2025 and has held it in 3 quarters since. The position peaked at $1.1M in Q4 2025. 77 funds tracked by Wall St. Rank hold OSS as of Q1 2026.

  • Thompson Siegel & Walmsley held 96,963 shares of One Stop Systems worth $734K as of Q1 2026.
  • Thompson Siegel & Walmsley sold 56,161 One Stop Systems shares in Q1 2026, an estimated $524K.
  • One Stop Systems made up 0.01% of Thompson Siegel & Walmsley's portfolio in Q1 2026, its #334 holding.
  • Thompson Siegel & Walmsley first reported a position in One Stop Systems in Q3 2025 and has held it in 3 quarters since.
  • Thompson Siegel & Walmsley's One Stop Systems position peaked at $1.1M in Q4 2025.
  • 77 funds tracked by Wall St. Rank held One Stop Systems as of Q1 2026.

Based on Thompson Siegel & Walmsley's 13F filing for Q1 2026, filed 11 May 2026.