Jane Street
TSSI

Jane Street’s TSS Inc TSSI Stock Holding History

Jane Street’s Portfolio TSSI Stock Details TSSI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$1.32M Buy
101,100
+19,600
+24% +$197K ﹤0.01% 5902
2025
Q4 		$576K Sell
81,500
-109,300
-57% -$1.41M ﹤0.01% 7373
2025
Q3 		$3.46M Buy
190,800
+81,300
+74% +$1.62M ﹤0.01% 3996
2025
Q2 		$3.16M Buy
109,500
+69,600
+174% +$915K ﹤0.01% 3676
2025
Q1 		$313K Buy
+39,900
New +$475K ﹤0.01% 7733

Other funds holding TSSI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
VARA
Value Aligned Research Advisors Princeton, New Jersey $20.7B AUM 292.88% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
SAM
Silvercrest Asset Management New York $13.8B AUM 28.39% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Jane Street's TSSI Position: Q1 2026 in Review

Jane Street increased its TSS Inc (TSSI) stake by 173% in Q1 2026, buying an estimated $4.2M and bringing the position to 658,081 shares worth $8.56M. The position accounts for ﹤0.01% of the portfolio, ranked #2734.

Jane Street first reported a position in TSSI in Q4 2024 and has held it in 5 quarters since. 109 funds tracked by Wall St. Rank hold TSSI as of Q1 2026.

  • Jane Street held 658,081 shares of TSS Inc worth $8.56M as of Q1 2026.
  • Jane Street bought 417,039 TSS Inc shares in Q1 2026, an estimated $4.2M.
  • TSS Inc made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #2734 holding.
  • Jane Street first reported a position in TSS Inc in Q4 2024 and has held it in 5 quarters since.
  • 109 funds tracked by Wall St. Rank held TSS Inc as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.