SI-BONE Form 4: Pisetsky tax sell covers RSU vesting

Rhea-AI Filing Summary

SI-BONE, Inc. (SIBN) – Form 4 filing dated 07/07/2025

Senior Vice President, Operations & Administration and Chief Legal Officer Michael A. Pisetsky reported a routine “sell-to-cover” transaction tied to the vesting of restricted stock units (RSUs) on 07/02/2025. To satisfy withholding taxes, Pisetsky sold an aggregate 3,127 common shares in three market transactions at weighted-average prices between $18.26 – $18.38 per share.

Following the sales, the executive retains 261,681 common shares, which includes 145,043 shares underlying un-settled RSUs. No derivative securities were involved, and the filing states the sales were non-discretionary and solely for tax purposes.

The disposition represents approximately 1.2 % of the executive’s post-transaction holdings and does not alter overall insider ownership meaningfully. There is no indication of strategic intent or change in outlook for SIBN; the filing is considered administratively routine under Section 16 rules.

Insights

Securities Analyst

TL;DR: Routine sell-to-cover of 3,127 shares; negligible impact on SIBN outlook.

The Form 4 shows a standard tax-withholding sale by SVP & CLO Michael Pisetsky. Post-sale ownership remains high at 261,681 shares (≈145 k RSUs pending). The 3,127-share disposition equals roughly one trading day’s volume (<1 % float impact) and just 1.2 % of the insider’s stake. Because the transaction is nondiscretionary and required by RSU vesting, it does not imply bearish sentiment. Consequently, the filing is neutral for valuation and sentiment purposes.

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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X

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)
07/02/2025

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	07/02/2025		S(1)		34	D	$18.375	264,774	D
Common Stock	07/02/2025		S(1)		1,795	D	$18.3125(2)	262,979	D
Common Stock	07/02/2025		S(1)		1,298	D	$18.2644(3)	261,681(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. This transaction was executed in multiple trades at prices ranging from $18.09 USD to $18.44 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. This transaction was executed in multiple trades at prices ranging from $18.07 USD to $18.38 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.

4. Includes 145,043 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.

Remarks:

	/s/ Michael A. Pisetsky	07/07/2025
	** 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.
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FAQ

How many SI-BONE (SIBN) shares did the insider sell?

3,127 common shares were sold on 07/02/2025.

Why did Michael A. Pisetsky sell SIBN shares?

The shares were sold to cover tax withholding on vested RSUs, a non-discretionary transaction.

What price range were the SIBN shares sold at?

Weighted-average prices ranged from $18.26 to $18.38 per share.

How many SIBN shares does the insider still own after the sale?

Pisetsky beneficially owns 261,681 shares, including 145,043 RSUs.

Does this Form 4 filing indicate a change in SI-BONE’s outlook?

No. The filing is routine and does not reflect strategic intent or sentiment on the company’s prospects.