As of November 10, 2026, SI-BONE, Inc. is a publicly traded company (Nasdaq: SIBN); its largest reported holder is Mathew P. Arens, with 18.36% on Schedule 13G/A of May 7, 2026, then BlackRock (8%). The largest insider holding is Laura Francis, the chief executive and a director, with 672,385 shares (1.5% of shares outstanding), per Form 4 of November 6, 2026 (Schedule 13G/A, May 7, 2026).
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Is SI-BONE, Inc. a real, registered company?
- SI-BONE, Inc. files with the SEC under CIK 1459839 (its SEC filings).
- Its shares are listed under the ticker SIBN on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Santa Clara, California, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under SI-BONE, Inc. in our court records and SEC 8-K records (as of 2026-11-10).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Cadian Capital Management, LP (filed 2026-08-14).
Who are SI-BONE, Inc.'s owners and officers?
SI-BONE, Inc.: incorporated in Delaware; business address in Santa Clara, California; industry Surgical & Medical Instruments & Apparatus (Schedule 13G, 2026-08-14).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G, 2026-08-14 | Cadian Capital Management, LP | 7.5% |
| Schedule 13G/A, 2026-07-30 | Blackrock, Inc. | 8% |
| Schedule 13G/A, 2026-05-07 | Mathew P. Arens | 18.36% |
| Schedule 13G/A, 2026-04-24 | Blackrock, Inc. | 6.9% |
| Schedule 13G/A, 2026-03-27 | The Vanguard Group | 0% |
| Schedule 13G/A, 2026-02-17 | Orbimed Capital LLC | 0% |
| Schedule 13G/A, 2026-02-13 | Brown Advisory Inc | 5.79% |
| Schedule 13G/A, 2026-02-13 | American Century Investment Management, Inc. | 5.3% |
| Schedule 13G, 2026-02-12 | Champlain Investment Partners, LLC | 4.9% |
| Schedule 13G, 2025-12-05 | Mathew P. Arens | 11.92% |
| Schedule 13G/A, 2025-11-14 | American Century Investment Management, Inc. | 6.6% |
| Schedule 13G/A, 2025-08-14 | Orbimed Capital LLC | 5.1% |
Questions about who owns SI-BONE, Inc.
Who owns SI-BONE, Inc.?
On this page, 5 holders' latest ownership filings report 5% or more of SI-BONE, Inc.: Mathew P. Arens (18.36%, Schedule 13G/A, filed 2026-05-07), Blackrock, Inc. (8%, Schedule 13G/A, filed 2026-07-30), Cadian Capital Management, LP (7.5%, Schedule 13G, filed 2026-08-14), Brown Advisory Inc (5.79%, Schedule 13G/A, filed 2026-02-13) and American Century Investment Management, Inc. (5.3%, Schedule 13G/A, filed 2026-02-13).
Who are the largest shareholders of SI-BONE, Inc.?
By the share each holder's latest filing reports, the largest holders of SI-BONE, Inc. on this page are Mathew P. Arens (18.36%), Blackrock, Inc. (8%) and Cadian Capital Management, LP (7.5%).
When did Mathew P. Arens buy into SI-BONE, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Mathew P. Arens on this page is the Schedule 13G, filed 2025-12-05, reporting 11.92%; its latest, Schedule 13G/A filed 2026-05-07, reports 18.36%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 12 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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What the Full Report on SI-BONE, Inc. covers
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What They Do, And How The Money Works
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The Money: Funding, Valuation, Runway
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Warning Bells
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Which insiders own SI-BONE, Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- , the chief executive and a director: 672,385 shares (1.5% of shares outstanding), 368,129 held directly and 304,256 indirectly (Form 4, 2026-11-06).
- Anthony J. Recupero: 243,418 shares (0.54% of shares outstanding) (Form 4, 2026-02-18).
- , the chief op and amp: 211,250 shares (0.47% of shares outstanding) (Form 4, 2026-11-06).
- , the senior vice president and operations: 204,611 shares (0.45% of shares outstanding), 164,444 held directly and 40,167 indirectly (Form 4/A, 2026-11-09).
- , a director: 146,025 shares (0.32% of shares outstanding), 54,258 held directly and 91,767 indirectly (Form 4, 2026-06-08).
Shares outstanding: 45,113,087 as of 2026-10-28, from the company's latest SEC cover page.
How much has SI-BONE, Inc. raised?
No fundraising or offering filing from SI-BONE, Inc. is on file with us.
Keep reading
More on SI-BONE, Inc. and the records around it.
SI-BONE, Inc. elsewhere on the record
- 5%+ stake filings Aug 2026
Companies that share a holder
- Champlain Investment Partners, LLC also filed stake reports on 6 other companies: Baldwin Insurance Group, Inc. (Feb 2026), Freshpet, Inc. (Feb 2026), OneStream, Inc. (Feb 2026)
- Cadian Capital Management, LP also filed stake reports on 7 other companies: Cryoport, Inc. (Aug 2026), Flywire Corp. (Aug 2026), TACTILE SYSTEMS TECHNOLOGY INC (Aug 2026)
- BROWN ADVISORY INC also filed stake reports on 11 other companies: Andersen Group Inc. (Oct 2026), Lumexa Imaging Holdings, Inc. (Aug 2026), Nomad Foods Ltd (Aug 2026)
Related pages
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