Group One Trading
TSSI

Group One Trading’s TSS Inc TSSI Stock Holding History

Group One Trading’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 		$134K Sell
10,300
-11,500
-53% -$116K ﹤0.01% 4459
2025
Q4 		$154K Sell
21,800
-85,100
-80% -$1.1M ﹤0.01% 4617
2025
Q3 		$1.94M Buy
106,900
+78,600
+278% +$1.57M ﹤0.01% 2348
2025
Q2 		$816K Sell
28,300
-20,900
-42% -$275K ﹤0.01% 2953
2025
Q1 		$386K Buy
49,200
+43,600
+779% +$519K ﹤0.01% 3354
2024
Q4 		$66.4K Buy
+5,600
New +$54.4K ﹤0.01% 4842

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
Jane Street
Jane Street New York $777B AUM 61.18% 1-Year Est. Return
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

Group One Trading's TSSI Position: Q1 2026 in Review

Group One Trading opened a new position in TSS Inc (TSSI) in Q1 2026: 56,665 shares worth $737K. The stake represents ﹤0.01% of the portfolio and ranks #2975 among its holdings. This is a return to the name: Group One Trading previously reported a position in TSSI as recently as Q3 2025.

Group One Trading first reported a position in TSSI in Q4 2024 and has held it in 4 quarters since. The position peaked at $2.08M in Q3 2025. 109 funds tracked by Wall St. Rank hold TSSI as of Q1 2026.

  • Group One Trading held 56,665 shares of TSS Inc worth $737K as of Q1 2026.
  • TSS Inc was a new Group One Trading position in Q1 2026.
  • TSS Inc made up ﹤0.01% of Group One Trading's portfolio in Q1 2026, its #2975 holding.
  • Group One Trading first reported a position in TSS Inc in Q4 2024 and has held it in 4 quarters since.
  • Group One Trading's TSS Inc position peaked at $2.08M in Q3 2025.
  • 109 funds tracked by Wall St. Rank held TSS Inc as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.