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Equibles

SI

Shoulder Innovations, Inc.

Company with tickers: SI

CIK
1699350
CUSIP
82537J108
13F Activity (30d)
49 filings 46 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 58
Total Value: $110,812,109
Total Shares: 7,626,438

Institutional Ownership Trend

3 quarters

Holder Concentration

Across 58 13F filers · Δ vs Dec 31, 2025
Top Holder
49.6%
Sep 2025 → Mar 2026 · range 49.6% – 58.1%
−8.4 pts
Top 5
72.2%
Sep 2025 → Mar 2026 · range 72.2% – 78.1%
−5.8 pts
Top 10
86.4%
Sep 2025 → Mar 2026 · range 86.4% – 91.6%
−4.8 pts
HHI
2,650
Sep 2025 → Mar 2026 · range 2,650 – 3,523
Highly concentrated −873

Quarterly Activity

vs Dec 31, 2025
New
16
Increased
24
Decreased
9
Sold Out
8
Unchanged
9
Holder count: +8
Institutional value: +16.9%
Shares held: +15.0%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega BlackRock, Inc. +244,699 556,052
Mega JPMORGAN CHASE & CO +128,795 130,711
Mega MILLENNIUM MANAGEMENT LLC +101,939 193,942
Small Roubaix Capital, LLC +98,305 257,121
Small CM Management, LLC +75,000 100,000

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega FMR LLC −64,243 3,784,552
Small SECTORAL ASSET MANAGEMENT INC −62,028 430,407
Small Sio Capital Management, LLC −17,330 210,641
Large Walleye Capital LLC −8,251 85,183
Mega BARCLAYS PLC −5,272 2,185

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 413,480 $6,007,864
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 60,997 $886,286
Mega VANGUARD FIDUCIARY TRUST CO 37,622 $546,647
Small KCM Capital Inc 35,000 $508,550
Mega Bank of New York Mellon Corp 17,366 $252,327

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 220,430 $3,152,147
Large FEDERATED HERMES, INC. 87,726 $1,254,481
Mid GSA CAPITAL PARTNERS LLP 22,750 $325,325
Mega JANE STREET GROUP, LLC 16,367 $234,048
Small Board of Trustees of The Leland Stanford Junior University 13,521 $193,350
Filter: New 16 Increased 24 Reduced 9 Sold out 8 Unchanged 9
Showing 58 of 58
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega FMR LLC $54,989,539 49.62% 3,784,552
Mega BlackRock, Inc. $8,079,434 7.29% 556,052
Small SECTORAL ASSET MANAGEMENT INC $6,253,813 5.64% 430,407
Mega VANGUARD CAPITAL MANAGEMENT LLC $6,007,864 5.42% 413,480
Mid TimesSquare Capital Management, LLC $4,689,760 4.23% 322,764
Small Roubaix Capital, LLC $3,735,968 3.37% 257,121
Large Alyeska Investment Group, L.P. $3,385,257 3.05% 232,984
Small Sio Capital Management, LLC $3,060,613 2.76% 210,641
Mega MILLENNIUM MANAGEMENT LLC $2,817,977 2.54% 193,942
Mega GEODE CAPITAL MANAGEMENT, LLC $2,668,855 2.41% 183,679
Mega MORGAN STANLEY $2,289,606 2.07% 157,578
Mega JPMORGAN CHASE & CO $1,899,230 1.71% 130,711
Small CM Management, LLC $1,453,000 1.31% 100,000
Mega STATE STREET CORP $1,354,849 1.22% 93,245
Large Walleye Capital LLC $1,237,708 1.12% 85,183
Mega NORTHERN TRUST CORP Bank $930,892 0.84% 64,067
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $886,286 0.80% 60,997
Mega ROYAL BANK OF CANADA Bank $782,918 0.71% 53,883
Mid READYSTATE ASSET MANAGEMENT LP $572,932 0.52% 39,431
Mega VANGUARD FIDUCIARY TRUST CO Bank $546,647 0.49% 37,622
Small KCM Capital Inc $508,550 0.46% 35,000
Mega BANK OF AMERICA CORP /DE/ Bank $392,062 0.35% 26,983
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $333,492 0.30% 22,952
Mega Bank of New York Mellon Corp Bank $252,327 0.23% 17,366
Mid Blue Trust, Inc. $228,397 0.21% 15,719
Mega GOLDMAN SACHS GROUP INC $203,652 0.18% 14,016
Mega CITADEL ADVISORS LLC $196,503 0.18% 13,524
Mega Nuveen, LLC $176,931 0.16% 12,177
Mega DEUTSCHE BANK AG\ Bank $135,579 0.12% 9,331
Large MetLife Investment Management, LLC $90,434 0.08% 6,224
Mega UBS Group AG $73,202 0.07% 5,038
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $70,732 0.06% 4,868
Mega RHUMBLINE ADVISERS $68,930 0.06% 4,744
Large JONES FINANCIAL COMPANIES LLLP $68,523 0.06% 4,716
Mega WELLS FARGO & COMPANY/MN $55,678 0.05% 3,832
Mid China Universal Asset Management Co., Ltd. $52,308 0.05% 3,600
Mega Vanguard Global Advisers, LLC $40,189 0.04% 2,766
Large Police & Firemen's Retirement System of New Jersey Pension $36,906 0.03% 2,540
Mega BNP PARIBAS ARBITRAGE, SA $32,663 0.03% 2,248
Mega BARCLAYS PLC $31,747 0.03% 2,185
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $26,154 0.02% 1,800
Large OSAIC HOLDINGS, INC. $21,431 0.02% 1,475
Large Steward Partners Investment Advisory, LLC $14,530 0.01% 1,000
Mega Legal & General Group Plc $12,786 0.01% 880
Mid Tower Research Capital LLC (TRC) $11,638 0.01% 801
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $8,340 0.01% 574
Mega CITIGROUP INC $7,641 0.01% 526
Large Russell Investments Group, Ltd. $5,928 0.01% 408
Mid Ameritas Investment Partners, Inc. $5,812 0.01% 400
Large CWM, LLC $2,920 0.00% 201
Mid Sterling Capital Management LLC $2,266 0.00% 156
Large NATIONAL BANK OF CANADA /FI/ Bank $392 0.00% 27
Small Root Financial Partners, LLC $101 0.00% 7
Mid Arax Advisory Partners $87 0.00% 6
Mid MAI Capital Management $58 0.00% 4
Small Essential Partners LLC $29 0.00% 2
Mid EverSource Wealth Advisors, LLC $29 0.00% 2
Micro True Wealth Design, LLC $14 0.00% 1

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