[Form 4] SI-BONE, Inc. Insider Trading Activity

Rhea-AI Filing Summary

SI‑BONE (SIBN) director reported a routine insider transaction. On 11/03/2025, the reporting person sold 293 shares of common stock at a weighted average price of $14.8038. The filing states this was a sell‑to‑cover to satisfy tax withholding from vesting RSUs, not a discretionary trade.

Following the transaction, the filer beneficially owns 10,831 shares directly and 118,350 shares indirectly via a trust. The direct holdings include 10,307 shares issuable upon settlement of restricted stock units, each representing one share.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

DUNN JEFFREY W

(Last) (First) (Middle)

C/O SI-BONE, INC.

471 EL CAMINO REAL, SUITE 101

(Street)

SANTA CLARA CA 95050

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SI-BONE, Inc. [ SIBN ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/03/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/03/2025		S(1)		293	D	$14.8038(2)	10,831(3)	D
Common Stock								118,350(4)	I	by Trust(5)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale reported on this Form 4 represents shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units. The sale satisfies the tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the Reporting Person.

2. This transaction was executed in multiple trades at prices ranging from $14.68 USD to $15.03 USD; the price reported above reflects the weighted average sale price. . The Reporting Person undertakes to provide Issuer, any security holder 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.

3. Includes 10,307 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.

4. Reflects the transfer of shares from the Reporting Person to The Jeffrey W. Dunn Living Trust dated May 17, 2012.

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

Remarks:

	/s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn	11/04/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider activity did SIBN disclose on Form 4?

A director reported selling 293 shares on 11/03/2025 to cover taxes from RSU vesting.

At what price were the SIBN shares sold?

The weighted average sale price was $14.8038, with trades ranging from $14.68 to $15.03.

Why were the SIBN shares sold?

The filing states it was a sell‑to‑cover for tax withholding tied to RSU vesting, not a discretionary trade.

How many shares does the insider own after the sale?

Post‑transaction holdings are 10,831 shares directly and 118,350 shares indirectly through a trust.

Do the reported holdings include unissued RSU shares?

Yes. Direct holdings include 10,307 shares issuable upon settlement of restricted stock units.

What is the insider’s relationship to SI‑BONE (SIBN)?

The reporting person is a Director of SI‑BONE, Inc.