SI-BONE (SIBN) director discloses option exercise and stock sales in filing

Rhea-AI Filing Summary

SI-BONE, Inc. director Jeffrey W. Dunn reported a series of transactions in the company’s common stock. On December 8, 2025, he exercised a stock option for 1,241 shares at an exercise price of $4.32 per share and acquired those shares.

That same day, he sold 1,241 shares of common stock and separately sold another 18,759 shares, both reported with a weighted-average sale price of $19.3297 per share, with individual sale prices ranging from $19.13 to $19.85. The sales were made under a Rule 10b5-1 trading plan dated May 7, 2025. After these transactions, he beneficially owned 10,307 shares directly, including shares issuable on settlement of restricted stock units, and 110,115 shares indirectly through The Jeffrey W. Dunn Living Trust dated May 17, 2012.

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

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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).

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)
12/08/2025

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	12/08/2025		M		1,241	A	$4.32	11,548	D
Common Stock	12/08/2025		S(1)		1,241	D	$19.3297(2)	10,307(3)	D
Common Stock	12/08/2025		S(1)		18,759	D	$19.3297(2)	110,115	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	12/08/2025		M			1,241	(5)	07/26/2026	Common Stock	1,241	$0.00	0.00	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. The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $19.13 to $19.85, 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 these footnotes.

3. Includes 10,307 shares issuable on settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive on shares of the Issuer's common stock.

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	12/10/2025
	** 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 transaction did SI-BONE (SIBN) report for director Jeffrey W. Dunn?

The report shows that Jeffrey W. Dunn, a director of SI-BONE, Inc., exercised a stock option for 1,241 shares at $4.32 per share and then sold 1,241 and 18,759 shares of common stock on December 8, 2025.

At what prices were the SI-BONE (SIBN) shares sold by Jeffrey W. Dunn?

The sales were reported at a weighted-average price of $19.3297 per share. The shares were sold in multiple transactions with prices ranging from $19.13 to $19.85, inclusive.

How many SI-BONE shares does Jeffrey W. Dunn own after these transactions?

After the transactions, Jeffrey W. Dunn beneficially owned 10,307 shares directly, which include shares issuable on settlement of restricted stock units, and 110,115 shares indirectly through The Jeffrey W. Dunn Living Trust Dated May 17, 2012.

What stock option did Jeffrey W. Dunn exercise at SI-BONE?

He exercised a stock option (right to buy) covering 1,241 shares of SI-BONE common stock at an exercise price of $4.32 per share. Following this exercise, the number of derivative securities under that option was reported as 0, and the option has an expiration date of July 26, 2026.

Were Jeffrey W. Dunn’s SI-BONE share sales made under a Rule 10b5-1 trading plan?

Yes. The filing states that the sale reported was effected pursuant to a 10b5-1 trading plan dated May 7, 2025, which is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

How are Jeffrey W. Dunn’s indirect SI-BONE (SIBN) holdings structured?

His indirect holdings consist of 110,115 shares of SI-BONE common stock held by The Jeffrey W. Dunn Living Trust Dated May 17, 2012, as reported in the filing.