Jeffrey W. Dunn - 01 Sep 2026 Form 4 Insider Report for SI-BONE, Inc. (SIBN)

Reporting relationship: Director
Issuer ticker: SIBN
Reported as of: 01 Sep 2026
Net transaction value: -$378,160
SEC form: 4
Accepted by SEC: 03 Sep 2026, 19:26:53 UTC
Prior SEC filing: 05 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn

Key filing fact

Jeffrey W. Dunn filed Form 4 for SI-BONE, Inc. (SIBN) on 03 Sep 2026.

Key facts

This page summarizes Jeffrey W. Dunn's Form 4 filing for SI-BONE, Inc. (SIBN).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 03 Sep 2026, 19:26.

Change

Previous filing in this sequence was filed on 05 Aug 2026.
Current net transaction value: -$378,160.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001035986 Primary reporting owner

DUNN JEFFREY W

Relationship: Director
Address: C/O SI-BONE, INC., 471 EL CAMINO REAL, SUITE 101, SANTA CLARA
Signature: /s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn
Signature date: 03 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SIBN transaction

Common Stock

Options Exercise

Transaction value
Shares: +18,633
Change %: +116%
Price: $4.68^*
Shares after: 34,690
Date: 01 Sep 2026
Ownership: Direct

SIBN transaction

Common Stock

Options Exercise

Transaction value
Shares: +1,367
Change %: +3.9%
Price: $4.68^*
Shares after: 36,057
Date: 01 Sep 2026
Ownership: Direct

SIBN transaction

Common Stock

Sale

Transaction value: $352,313
Shares: -18,633
Change %: -52%
Price: $18.91
Shares after: 17,424
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F1, F2

SIBN transaction

Common Stock

Sale

Transaction value: $25,847
Shares: -1,367
Change %: -7.8%
Price: $18.91
Shares after: 16,057
Date: 01 Sep 2026
Ownership: Direct
Footnotes: F1, F2, F3

SIBN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 81,073
Date: 01 Sep 2026
Ownership: by Trust
Footnotes: F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SIBN transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -1,367
Change %: -1.3%
Price: $0.000000^*
Shares after: 104,893
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,367
Exercise price: $4.68
Footnotes: F5

SIBN transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -18,633
Change %: -18%
Price: $0.000000^*
Shares after: 86,260
Date: 01 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 18,633
Exercise price: $4.68
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated May 7th, 2025.

Footnote F2

The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $18.6450 to $19.6449, inclusive. The Reporting Person undertakes to provide the Issuer, any securityholder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Footnote F3

Includes 10,957 shares issuable on the settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Footnote F4

Shares held by The Jeffrey W. Dunn Living Trust Dated May 17, 2012.

Footnote F5

The shares subject to the option vest in equal monthly installments over four years commencing on the vesting commencement date, subject to Reporting Person's continued service through each relevant vesting date.