New Positions
12 managers initiated
Top five by reported value
- Roubaix Capital, LLC$2.3M
- MILLENNIUM MANAGEMENT LLC$1.3M
- CM Management, LLC$357.5K
- JANE STREET GROUP, LLC$234.0K
- RENAISSANCE TECHNOLOGIES LLC$175.9K
Shoulder Innovations Inc NEW YORK STOCK EXCHANGE, INC.:SI
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
12 new12 added25 reduced5 exited
Total Institutional Holders
49
as of 2025-12-31
Top Holder
FMR LLC
$55.0M
Largest QoQ Increase
Roubaix Capital, LLC
+158,816 sh
Largest QoQ Decrease
DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)
-482,572 sh
New Positions(12)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Roubaix Capital, LLC | 158,816 | +158,816 | $2.3M | +$2.3M | — |
| MILLENNIUM MANAGEMENT LLC | 92,003 | +92,003 | $1.3M | +$1.3M | — |
| CM Management, LLC | 25,000 | +25,000 | $357.5K | +$357.5K | — |
| JANE STREET GROUP, LLC | 16,367 | +16,367 | $234.0K | +$234.0K | — |
| RENAISSANCE TECHNOLOGIES LLC | 12,300 | +12,300 | $175.9K | +$175.9K | — |
| ADVISOR GROUP HOLDINGS, INC. | 1,475 | +1,475 | $21.1K | +$21.1K | — |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 293 | +293 | $4.2K | +$4.2K | — |
| GSA CAPITAL PARTNERS LLP | 22,750 | +22,750 | $325 | +$325 | — |
| EverSource Wealth Advisors, LLC | 7 | +7 | $100 | +$100 | — |
| True Wealth Design, LLC | 1 | +1 | $15 | +$15 | — |
| IFP Advisors, Inc | 1 | +1 | $14 | +$14 | — |
| CWM, LLC | 151 | +151 | $2 | +$2 | — |
Added To(12)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| SECTORAL ASSET MANAGEMENT INC | 492,435 | +62,153 | $7.0M | +$1.6M | 14.4% |
| VANGUARD GROUP INC | 220,430 | +74,162 | $3.2M | +$1.3M | 50.7% |
| BlackRock, Inc. | 311,353 | +33,980 | $4.5M | +$971.3K | 12.3% |
| MORGAN STANLEY | 150,794 | +35,967 | $2.2M | +$715.3K | 31.3% |
| Walleye Capital LLC | 93,434 | +21,619 | $1.3M | +$434.8K | 30.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 110,303 | +16,258 | $1.6M | +$397.7K | 17.3% |
| STATE STREET CORP | 58,422 | +19,641 | $835.4K | +$348.7K | 50.6% |
| CITIGROUP INC | 5,583 | +5,427 | $79.8K | +$77.9K | 3478.8% |
| WELLS FARGO & COMPANY/MN | 5,250 | +2,094 | $75.1K | +$35.5K | 66.3% |
| BARCLAYS PLC | 7,457 | +722 | $106.6K | +$22.1K | 10.7% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 2,301 | +88 | $32.9K | +$5.1K | 4.0% |
| Sterling Capital Management LLC | 126 | +13 | $1.8K | +$384 | 11.5% |
Reduced(25)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| FMR LLC | 3,848,795 | 0 | $55.0M | +$6.7M | 0.0% |
| Alyeska Investment Group, L.P. | 232,984 | -218,552 | $3.3M | -$2.3M | -48.4% |
| FEDERATED HERMES, INC. | 87,726 | -112,274 | $1.3M | -$1.3M | -56.1% |
| Sio Capital Management, LLC | 227,971 | -122,029 | $3.3M | -$1.1M | -34.9% |
| TimesSquare Capital Management, LLC | 289,850 | -92,517 | $4.1M | -$653.9K | -24.2% |
| CITADEL ADVISORS LLC | 18,780 | -31,220 | $268.6K | -$358.9K | -62.4% |
| UBS Group AG | 1,566 | -15,461 | $22.4K | -$191.3K | -90.8% |
| BANK OF AMERICA CORP /DE/ | 18,778 | -6,892 | $268.5K | -$53.6K | -26.8% |
| READYSTATE ASSET MANAGEMENT LP | 39,431 | -1,314 | $563.9K | +$52.5K | -3.2% |
| DEUTSCHE BANK AG\ | 4,133 | -3,604 | $59.1K | -$38.0K | -46.6% |
| NORTHERN TRUST CORP | 35,693 | -2,443 | $510.4K | +$31.8K | -6.4% |
| Tower Research Capital LLC (TRC) | 702 | -2,053 | $10.0K | -$24.5K | -74.5% |
| Board of Trustees of The Leland Stanford Junior University | 13,521 | 0 | $193.3K | +$23.7K | 0.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 11,779 | 0 | $168.4K | +$20.6K | 0.0% |
| RHUMBLINE ADVISERS | 3,131 | -1,155 | $44.8K | -$9.0K | -26.9% |
| BNP PARIBAS ARBITRAGE, SNC | 1,048 | -652 | $15.0K | -$6.3K | -38.4% |
| JPMORGAN CHASE & CO | 1,916 | -2 | $27.4K | +$3.3K | -0.1% |
| NEW YORK STATE COMMON RETIREMENT FUND | 1,800 | 0 | $25.7K | +$3.1K | 0.0% |
| Royal Bank of Canada | 754 | -316 | $11.0K | -$2.0K | -29.5% |
| Steward Partners Investment Advisory, LLC | 1,000 | 0 | $14.3K | +$1.8K | 0.0% |
| Legal & General Group Plc | 462 | 0 | $6.6K | +$795 | 0.0% |
| Russell Investments Group, Ltd. | 408 | 0 | $5.8K | +$714 | 0.0% |
| Ameritas Investment Partners, Inc. | 400 | 0 | $5.7K | +$700 | 0.0% |
| NATIONAL BANK OF CANADA /FI/ | 27 | 0 | $386 | +$47 | 0.0% |
| AMALGAMATED BANK | 150 | -4 | $2 | $0 | -2.6% |
Sold Out(5)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | 0 | -482,572 | $0 | -$6.1M | — |
| MARSHALL WACE, LLP | 0 | -132,888 | $0 | -$1.7M | — |
| Monashee Investment Management LLC | 0 | -40,000 | $0 | -$502.0K | — |
| OXFORD ASSET MANAGEMENT LLP | 0 | -21,634 | $0 | -$271.5K | — |
| STRS OHIO | 0 | -900 | $0 | -$11.3K | — |
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| FMR LLC | 3,848,795 | $55.0M | 0 | 0.0% |
| SECTORAL ASSET MANAGEMENT INC | 492,435 | $7.0M | +62,153 | 14.4% |
| BlackRock, Inc. | 311,353 | $4.5M | +33,980 | 12.3% |
| TimesSquare Capital Management, LLC | 289,850 | $4.1M | -92,517 | -24.2% |
| Alyeska Investment Group, L.P. | 232,984 | $3.3M | -218,552 | -48.4% |
| Sio Capital Management, LLC | 227,971 | $3.3M | -122,029 | -34.9% |
| VANGUARD GROUP INC | 220,430 | $3.2M | +74,162 | 50.7% |
| Roubaix Capital, LLC | 158,816 | $2.3M | +158,816 | — |
| MORGAN STANLEY | 150,794 | $2.2M | +35,967 | 31.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 110,303 | $1.6M | +16,258 | 17.3% |
| Walleye Capital LLC | 93,434 | $1.3M | +21,619 | 30.1% |
| MILLENNIUM MANAGEMENT LLC | 92,003 | $1.3M | +92,003 | — |
| FEDERATED HERMES, INC. | 87,726 | $1.3M | -112,274 | -56.1% |
| STATE STREET CORP | 58,422 | $835.4K | +19,641 | 50.6% |
| READYSTATE ASSET MANAGEMENT LP | 39,431 | $563.9K | -1,314 | -3.2% |
| NORTHERN TRUST CORP | 35,693 | $510.4K | -2,443 | -6.4% |
| CM Management, LLC | 25,000 | $357.5K | +25,000 | — |
| CITADEL ADVISORS LLC | 18,780 | $268.6K | -31,220 | -62.4% |
| BANK OF AMERICA CORP /DE/ | 18,778 | $268.5K | -6,892 | -26.8% |
| JANE STREET GROUP, LLC | 16,367 | $234.0K | +16,367 | — |
New & Closed Positions this quarter
Closed Positions
5 managers exited
Top five by prior-quarter value
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for SI against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.