SHOULDER INNOVATIONS INC (SI) Institutional Ownership Changes & 13F Activity
SHOULDER INNOVATIONS INC (SI). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Driehaus Capital Management Llc, Parkman Healthcare Partners Llc, Fmr Llc, Jane Street Group, Llc, and Schonfeld Strategic Advisors Llc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Citadel Advisors Llc | Buy | +23,271 | +172.1% | 36,795 | $746.20K | Q2 2026 | Sep 02, 2026 |
| California State Teachers Retirement System | Sell | -429 | -74.7% | 145 | $2.94K | Q2 2026 | Aug 24, 2026 |
| Driehaus Capital Management Llc | Buy | +253,760 | — | 253,760 | $5.15M | Q2 2026 | Aug 14, 2026 |
| Parkman Healthcare Partners Llc | Buy | +226,212 | — | 226,212 | $4.59M | Q2 2026 | Aug 14, 2026 |
| Jane Street Group, Llc | Buy | +86,307 | — | 86,307 | $1.75M | Q2 2026 | Aug 14, 2026 |
| Schonfeld Strategic Advisors Llc | Buy | +77,737 | — | 77,737 | $1.58M | Q2 2026 | Aug 14, 2026 |
| Squarepoint Ops Llc | Buy | +44,159 | — | 44,159 | $895.54K | Q2 2026 | Aug 14, 2026 |
| Royal Bank Of Canada | Sell | -37,982 | -70.5% | 15,901 | $322.00K | Q2 2026 | Aug 14, 2026 |
| Sei Investments Co | Buy | +34,350 | — | 34,350 | $696.62K | Q2 2026 | Aug 14, 2026 |
| Point72 Asset Management, L.P. | Buy | +22,920 | — | 22,920 | $464.82K | Q2 2026 | Aug 14, 2026 |
| Aqr Capital Management Llc | Buy | +19,775 | — | 19,775 | $401.04K | Q2 2026 | Aug 14, 2026 |
| Bank Of America Corp | Buy | +6,946 | +25.7% | 33,929 | $688.08K | Q2 2026 | Aug 14, 2026 |
| Wells Fargo & Company/Mn | Buy | +5,017 | +130.9% | 8,849 | $179.46K | Q2 2026 | Aug 14, 2026 |
| Charles Schwab Investment Management Inc | Buy | +2,630 | +11.5% | 25,582 | $518.80K | Q2 2026 | Aug 14, 2026 |
| Barclays Plc | Sell | -415 | -19.0% | 1,770 | $35.90K | Q2 2026 | Aug 14, 2026 |
| Legal & General Group Plc | Buy | +231 | +26.3% | 1,111 | $22.53K | Q2 2026 | Aug 14, 2026 |
| Metlife Investment Management, Llc | Sell | -94 | -1.5% | 6,130 | $124.32K | Q2 2026 | Aug 14, 2026 |
| Mirae Asset Global Etfs Holdings Ltd. | Sell | -26 | -0.5% | 4,842 | $98.20K | Q2 2026 | Aug 14, 2026 |
| Fmr Llc | Sell | -110,592 | -2.9% | 3,673,960 | $74.51M | Q2 2026 | Aug 13, 2026 |
| Informed Momentum Co Llc | Buy | +57,998 | — | 57,998 | $1.18M | Q2 2026 | Aug 13, 2026 |
| Cm Management, Llc | Buy | +45,000 | +45.0% | 145,000 | $2.94M | Q2 2026 | Aug 13, 2026 |
| Morgan Stanley | Sell | -40,313 | -25.6% | 117,265 | $2.38M | Q2 2026 | Aug 13, 2026 |
| Marshall Wace, Llp | Buy | +38,667 | — | 38,667 | $784.17K | Q2 2026 | Aug 13, 2026 |
| Vanguard Capital Management Llc | Sell | -21,299 | -5.2% | 392,181 | $7.95M | Q2 2026 | Aug 13, 2026 |
| Jump Financial, Llc | Buy | +13,520 | — | 13,520 | $274.19K | Q2 2026 | Aug 13, 2026 |
| Vanguard Portfolio Management Llc | Buy | +9,338 | +15.3% | 70,335 | $1.43M | Q2 2026 | Aug 13, 2026 |
| Bnp Paribas Financial Markets | Buy | +7,976 | +354.8% | 10,224 | $207.34K | Q2 2026 | Aug 13, 2026 |
| Northern Trust Corp | Buy | +7,224 | +11.3% | 71,291 | $1.45M | Q2 2026 | Aug 13, 2026 |
| Ubs Group Ag | Buy | +6,174 | +122.5% | 11,212 | $227.38K | Q2 2026 | Aug 13, 2026 |
| Los Angeles Capital Management Llc | Buy | +5,847 | — | 5,847 | $118.58K | Q2 2026 | Aug 13, 2026 |
Frequently asked questions about SI activity
Which institutional owners are buying SI?
Institutional owners buying SI include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in SI activity?
"Buy" means an investor increased their reported position in SI compared to the prior reporting period. This reflects growing exposure to SHOULDER INNOVATIONS INC (SI) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in SI increasing?
Institutional interest in SI can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.