Ken Griffin
SI

Ken Griffin’s Shoulder Innovations Inc SI Stock Holding History

Ken Griffin’s Portfolio SI Stock Details SI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$197K Sell
13,524
-5,256
-28% -$73.1K ﹤0.01% 11434
2025
Q4 		$269K Sell
18,780
-31,220
-62% -$426K ﹤0.01% 10390
2025
Q3 		$628K Buy
+50,000
New +$699K ﹤0.01% 8582

Other funds holding SI

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
SAM
Sectoral Asset Management Montreal, Quebec, Canada $121M AUM 73.47% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
TCM
TimesSquare Capital Management New York $6.8B AUM 45.85% 1-Year Est. Return
RC
Roubaix Capital Denver, Colorado $279M AUM 54.84% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
SCM
Sio Capital Management New York $697M AUM 79.73% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Ken Griffin's SI Position: Q1 2026 in Review

Ken Griffin reduced its Shoulder Innovations Inc (SI) stake by 28% in Q1 2026, selling an estimated $73.1K and leaving 13,524 shares worth $197K. The position accounts for ﹤0.01% of the portfolio, ranked #11434.

Ken Griffin first reported a position in SI in Q3 2025 and has held it in 3 quarters since. The position peaked at $628K in Q3 2025. 58 funds tracked by Wall St. Rank hold SI as of Q1 2026.

  • Ken Griffin held 13,524 shares of Shoulder Innovations Inc worth $197K as of Q1 2026.
  • Ken Griffin sold 5,256 Shoulder Innovations Inc shares in Q1 2026, an estimated $73.1K.
  • Shoulder Innovations Inc made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #11434 holding.
  • Ken Griffin first reported a position in Shoulder Innovations Inc in Q3 2025 and has held it in 3 quarters since.
  • Ken Griffin's Shoulder Innovations Inc position peaked at $628K in Q3 2025.
  • 58 funds tracked by Wall St. Rank held Shoulder Innovations Inc as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.