SI-BONE (SIBN) director sells 20,000 shares under 10b5-1 plan, updates holdings

Rhea-AI Filing Summary

SI-BONE director Jeffrey W. Dunn, through The Jeffrey W. Dunn Living Trust Dated May 17, 2012, reported selling 20,000 shares of SI-BONE common stock on January 8, 2026. The sale was executed under a pre-arranged Rule 10b5-1 trading plan dated May 7, 2025 at a weighted-average price of $21.2753 per share, with individual trade prices ranging from $20.84 to $21.84.

Following the sale, the trust held 80,115 shares indirectly, while Dunn also had 10,307 shares directly, including shares issuable upon settlement of restricted stock units. Each restricted stock unit represents a contingent right to receive one share of SI-BONE common stock.

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)
01/08/2026

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	01/08/2026		S(1)		20,000	D	$21.2753(2)	80,115	I	by Trust(3)
Common Stock								10,307(4)	D

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 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 $20.84 to $21.84, 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.

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

4. 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.

Remarks:

	/s/ Michael A. Pisetsky, Attorney-in-Fact for Jeffrey W. Dunn	01/12/2026
	** 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) disclose for Jeffrey W. Dunn?

SI-BONE reported that director Jeffrey W. Dunn, via The Jeffrey W. Dunn Living Trust Dated May 17, 2012, sold 20,000 shares of SI-BONE common stock on January 8, 2026.

At what price were the 20,000 SI-BONE (SIBN) shares sold?

The 20,000 shares were sold at a weighted-average price of $21.2753 per share, in multiple transactions with prices ranging from $20.84 to $21.84.

Was the SI-BONE (SIBN) director’s stock sale under a Rule 10b5-1 plan?

Yes. The filing states the sale was effected pursuant to a Rule 10b5-1 trading plan dated May 7, 2025, indicating a pre-arranged program for selling shares.

How many SI-BONE (SIBN) shares does the Dunn trust hold after the sale?

After the reported transaction, 80,115 shares of SI-BONE common stock were held indirectly by The Jeffrey W. Dunn Living Trust Dated May 17, 2012.

What direct SI-BONE (SIBN) holdings and RSUs does Jeffrey W. Dunn have?

The filing shows 10,307 shares held directly, which include 10,307 shares issuable upon settlement of restricted stock units. Each RSU represents a contingent right to receive one share.

Who is listed as the reporting person in this SI-BONE (SIBN) insider filing?

The reporting person is DUNN JEFFREY W, identified as a director of SI-BONE, Inc., with part of his holdings reported as held indirectly by trust.