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

Rhea-AI Filing Summary

SI-BONE, Inc. (SIBN) reported insider sales by Michael A. Pisetsky, SVP, Ops & Adm/Chief Legal Officer, on 10/02/2025. The Form 4 shows a total of 3,128 shares of common stock sold across multiple trades to satisfy tax withholding on vesting restricted stock units; these sales are described as a "sell to cover" and not discretionary. Reported weighted average prices per transaction are $14.255, $14.1053, and $14.2537, and the filing lists 256,556, 256,522, and 255,224 shares beneficially owned after each reported sale line. The filing also discloses 132,362 shares issuable on settlement of restricted stock units retained by the reporting person.

Positive

• Transparent disclosure of insider sales and detailed price ranges per footnote
• Sales were non-discretionary "sell to cover" transactions tied to RSU tax withholding

Negative

• Insider sold shares (3,128 total), which may modestly reduce insider-held shares
• Beneficial ownership decreased in reported lines to as low as 255,224 shares

Insights

Corporate Governance Analyst

Sale was a routine sell-to-cover for RSU tax withholding, indicating compliance.

The transaction is described as a non-discretionary "sell to cover" tied to the vesting of restricted stock units, which is a common mechanism executives use to satisfy tax obligations without additional cash outlay. The reporting person remains an officer and retains a substantial position including 132,362 RSU-settled shares.

The principal dependency is the vesting schedule and tax treatment of the RSUs; future reporting will show whether similar automatic sales recur near vesting dates within the next 12 months.

Equity Markets Analyst

Insider sales were small relative to total holdings and executed at mid-$14 prices.

Total shares sold equal 3,128 and executed in multiple trades at prices ranging from $14.05 to $14.33 across the reported lines; weighted average prices per line are disclosed. The filing shows minute fluctuations in reported beneficial ownership figures after each line.

Market impact from these trades is unlikely given the modest size; watch for additional Form 4s around future RSU vesting events or any discretionary sales within the next fiscal year.

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
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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)
10/02/2025

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	10/02/2025		S(1)		1,796	D	$14.255(2)	256,556	D
Common Stock	10/02/2025		S(1)		34	D	$14.1053(3)	256,522	D
Common Stock	10/02/2025		S(1)		1,298	D	$14.2537(2)	255,224(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 $14.05 USD to $14.33 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 $14.10 USD to $14.16 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 132,362 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	10/06/2025
	** 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 did Michael A. Pisetsky report on the SIBN Form 4?

The filing reports the sale of 3,128 common shares on 10/02/2025 executed as "sell to cover" to satisfy tax withholding on vested RSUs.

Were the insider sales discretionary or routine on SIBN Form 4?

The sales are described as non-discretionary "sell to cover" transactions related to RSU vesting, not discretionary trades.

At what prices were the SIBN shares sold?

Transactions were executed in multiple trades with prices ranging from $14.05 to $14.33; weighted average prices per reported line are $14.255, $14.1053, and $14.2537.

How many RSU-settled shares does the reporting person have?

The filing discloses 132,362 shares issuable on settlement of restricted stock units held by the reporting person.

How did beneficial ownership change after the reported transactions?

Beneficial ownership figures reported after sales are 256,556, 256,522, and 255,224 shares on the respective sale lines.