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

Rhea-AI Filing Summary

SI-BONE (SIBN) director Jeffrey W. Dunn reported option exercises and related sales on 11/11/2025. He exercised stock options at $4.32 for 23,148 shares and 56,852 shares, then sold the same amounts at $18.95 per share pursuant to a Rule 10b5-1 trading plan dated May 7, 2025.

Following these transactions, he directly held 10,307 shares. He also had indirect ownership of 118,874 shares held by The Jeffrey W. Dunn Living Trust. The direct total includes 10,307 shares issuable upon settlement of restricted stock units, each representing one share of common stock. The option awards referenced vest in equal monthly installments over four years, subject to continued service.

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
Estimated average burden
hours per response:			0.5

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

X

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)
11/11/2025

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	11/11/2025		S(1)		23,148	D	$18.95	10,307	D
Common Stock	11/11/2025		M(1)		23,148	A	$4.32	33,455	D
Common Stock	11/11/2025		M(1)		56,852	A	$4.32	90,307	D
Common Stock	11/11/2025		S(1)		56,852	D	$18.95	10,307(2)	D
Common Stock								118,874(3)	I	by Trust(4)

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
Stock Option (Right to Buy)	$4.32	11/11/2025		M			23,148	(5)	07/26/2026	Common Stock	23,148	$0.00	58,093	D
Stock Option (Right to Buy)	$4.32	11/11/2025		M			56,852	(5)	07/26/2026	Common Stock	56,852	$0.00	1,241	D

Explanation of Responses:

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

2. 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.

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

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

5. 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.

Remarks:

	/s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn	11/13/2025
	** 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 transactions did SIBN’s director report on 11/11/2025?

He exercised options at $4.32 for 23,148 and 56,852 shares and sold the same amounts at $18.95 per share.

Were the SIBN share sales made under a Rule 10b5-1 plan?

Yes. The sales were effected under a Rule 10b5-1 trading plan dated May 7, 2025.

How many SIBN shares does the reporting person hold directly after the transactions?

He directly held 10,307 shares after the reported transactions.

What is the reporting person’s indirect ownership in SIBN?

He had 118,874 shares held indirectly by The Jeffrey W. Dunn Living Trust.

Do the direct holdings include any RSUs for SIBN?

Yes. They include 10,307 shares issuable upon settlement of restricted stock units, each for one common share.

What are the vesting terms of the SIBN stock options involved?

The options vest in equal monthly installments over four years, subject to continued service.