SI-BONE, Inc. (SIBN) SVP reports RSU tax sell-to-cover trades

Rhea-AI Filing Summary

SI-BONE, Inc. executive reports tax-related share sale

SI-BONE, Inc. Senior Vice President, Operations & Administration and Chief Legal Officer Michael A. Pisetsky reported selling small amounts of the company’s common stock on January 2, 2026. The sales, executed in three trades at prices of $19.75, $19.6811, and $19.5788 per share, were made to cover tax withholding obligations tied to the vesting of restricted stock units. According to the disclosure, this was a mandated “sell to cover” transaction and not a discretionary trade.

After these sales, Pisetsky beneficially owned 228,436 shares of SI-BONE common stock directly. This amount includes 119,679 shares that are issuable upon settlement of restricted stock units, each unit representing the right to receive one share of 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

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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^*

PISETSKY MICHAEL A.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Ops & Adm/Chief Legal Ofr

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

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	01/02/2026		S(1)		38	D	$19.75	231,858	D
Common Stock	01/02/2026		S(1)		1,436	D	$19.6811(2)	230,422	D
Common Stock	01/02/2026		S(1)		1,986	D	$19.5788(3)	228,436(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 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. The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $19.56 to $19.79, 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. The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $19.38 to $19.83, 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.

4. Includes 119,679 shares issuable on settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one shares of the Issuer's common stock.

Remarks:

	/s/ Michael A. Pisetsky	01/06/2026
	** 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.
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FAQ

Who is the insider reporting this Form 4 for SIBN?

The reporting person is Michael A. Pisetsky, who serves as SI-BONE, Inc.’s SVP, Operations & Administration and Chief Legal Officer.

What type of transaction did Michael Pisetsky report for SIBN?

He reported sales of common stock on January 2, 2026, coded as “S” transactions in Table I for non-derivative securities.

Why were Michael Pisetsky’s SIBN shares sold on January 2, 2026?

The footnotes explain the sale was required to cover tax withholding obligations related to the vesting of restricted stock units and was executed as a “sell to cover”, not a discretionary trade.

At what prices were the SIBN shares sold by Michael Pisetsky?

The reported sales occurred at $19.75, and at weighted-average prices of $19.6811 and $19.5788 per share, with underlying trades in stated price ranges.

How many SIBN shares does Michael Pisetsky hold after the reported transactions?

Following the sales, he beneficially owned 228,436 shares of SI-BONE common stock directly.

How many restricted stock units does Michael Pisetsky have at SIBN?

A footnote states his holdings include 119,679 shares issuable on settlement of restricted stock units, with each unit representing a right to receive one share of common stock.