SI-BONE, Inc. (SIBN)
Nasdaq: SIBN · Surgical & Medical Instruments & Apparatus · Santa Clara, CA · filing with the SEC since 2009
Who owns SI-BONE, Inc.
As filed with the SECHolders of 5% or more
5
Mathew P. Arens holds 18.4% of Common Stock, $0.001 par value, as its SCHEDULE 13G/A filed May 7, 2026 says.
Directors and officers
11
report now, of 24 people on the record since 2018. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Mathew P. Arens
SCHEDULE 13G/A · filed May 7, 2026 · Common Stock, $0.001 par value · 11.9% in Dec 5, 2025
Blackrock, Inc.
SCHEDULE 13G/A · filed Jul 30, 2026 · Common Stock · 6.9% in Apr 24, 2026
Cadian Capital Management, LP
SCHEDULE 13G · filed Aug 14, 2026 · Common Stock, par value $0.0001 per share
Brown Advisory Inc
SCHEDULE 13G/A · filed Feb 13, 2026 · Common Stock · 7.6% in Apr 18, 2025
American Century Investment Management, Inc.
SCHEDULE 13G/A · filed Feb 13, 2026 · Common Stock · 6.6% in Nov 14, 2025
Champlain Investment Partners, LLC
SCHEDULE 13G · filed Feb 12, 2026 · Common Stock · reported falling below 5%, from 5% in Aug 12, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%
OrbiMed Capital LLC
SCHEDULE 13G/A · filed Feb 17, 2026 · Common Stock, par value $0.0001 per share · reported falling below 5%, from 5.1% in Aug 14, 2025
What SIBN reports owning in othersstakes of 5% or more, and other ties
3 subsidiaries in 3 countries, from the list filed with the 10-K filed Feb 24, 2026.
Insider tradesForm 4
113sales
0purchases
40sales on a scheduled plan
7people selling
$16.7Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 9, 2025 to Nov 9, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 9, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window7 of 32 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Francis Laura | Chief Executive Officer | 29 | $6.6M | 11 | 0 | $0 |
| Dunn Jeffrey W | Chairman, President & CEO | 13 | $3.9M | 8 | 0 | $0 |
| Pisetsky Michael A | SVP, Ops & Adm/Chief Legal Ofr | 29 | $3.6M | 6 | 0 | $0 |
| Maheshwari Anshul | Chief Op & Financial Officer | 30 | $2.0M | 15 | 0 | $0 |
| Recupero Anthony J | President, Commercial Ops | 9 | $500,000 | 0 | 0 | $0 |
| Davis Timothy E Jr | director | 2 | $100,000 | 0 | 0 | $0 |
| Nishimura Mika | director | 1 | $100,000 | 0 | 0 | $0 |