SI-BONE executive sells shares to cover RSU taxes

SI-BONE, Inc. executive Michael A. Pisetsky, SVP Operations & Administration and Chief Legal Officer, reported open-market sales of company common stock primarily to cover taxes on vested restricted stock units.

Rhea-AI Filing Summary

SI-BONE, Inc. executive Michael A. Pisetsky, SVP Operations & Administration and Chief Legal Officer, reported open-market sales of company common stock primarily to cover taxes on vested restricted stock units. On July 2, 2026, he sold 3,134 shares in three trades at prices around $16.70 per share under a “sell to cover” arrangement, which the company notes was not a discretionary trade. His equity position continues to include 137,587 shares issuable upon settlement of restricted stock units.

Insider Trade Summary

Net Seller: 3,134 shares

Net Sell 3 txns

Insider PISETSKY MICHAEL A.

Role SVP, Ops & Adm/Chief Legal Ofr

Sold 3,134 shs ($52K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,799	$16.6992	$30K
Sale	Common Stock	34	$16.86	$573.24
Sale	Common Stock	1,301	$16.7256	$22K

Holdings After Transaction: Common Stock — 277,375 shares (Direct)

Footnotes (4)

1. F1. 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. F2. This transaction was executed in multiple trades at prices ranging from $16.48 USD to $16.955 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. F3. This transaction was executed in multiple trades at prices ranging from $16.47 USD to $16.955 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. F4. Includes 137,587 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.

Key Figures

Shares sold total: 3,134 shares Trade 1 size: 1,301 shares Trade 1 price: $16.7256 per share +5 more

8 metrics

Shares sold total 3,134 shares Net open-market sales on July 2, 2026 to cover RSU taxes

Trade 1 size 1,301 shares Common stock sale at $16.7256 per share on July 2, 2026

Trade 1 price $16.7256 per share Weighted average sale price for 1,301 shares of common stock

Trade 2 size 34 shares Common stock sale at $16.8600 per share on July 2, 2026

Trade 2 price $16.8600 per share Weighted average sale price for 34 shares of common stock

Trade 3 size 1,799 shares Common stock sale at $16.6992 per share on July 2, 2026

Trade 3 price $16.6992 per share Weighted average sale price for 1,799 shares of common stock

RSUs outstanding 137,587 shares Shares issuable upon settlement of restricted stock units held

Key Terms

restricted stock units, sell to cover, weighted average sale price, open-market sale, +1 more

5 terms

restricted stock units financial

"Includes 137,587 shares issuable on the settlement of restricted stock units granted to the Reporting Person."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

sell to cover financial

"The sale satisfies the tax withholding obligations to be funded by a "sell to cover" transaction"

Sell to cover is when a person who receives company stock through options or awards sells just enough shares immediately to pay required taxes, exercise costs, or fees, keeping the rest. Think of it like cashing part of a bonus to cover the tax bill so you can keep the remainder. For investors, it can create predictable small selling pressure and slightly change the number of shares actually held by insiders without increasing long‑term dilution.

weighted average sale price financial

"the price reported above reflects the weighted average sale price."

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

tax withholding obligations financial

"shares required to be sold by the Reporting Person to cover tax withholding obligations in connection with the vesting"

FAQ

What insider transaction did SI-BONE (SIBN) disclose for Michael A. Pisetsky?

SI-BONE reported that executive Michael A. Pisetsky sold 3,134 shares of common stock. The Form 4 states these sales were made to cover tax withholding obligations from vesting restricted stock units under a sell-to-cover arrangement, rather than as discretionary open-market trades.

Why did Michael A. Pisetsky sell SI-BONE (SIBN) shares in this Form 4?

The filing explains that the shares were sold to cover tax withholding obligations tied to vesting restricted stock units. This sell-to-cover method funds required taxes and, according to the disclosure, does not represent a discretionary trading decision by the reporting person.

How many SI-BONE (SIBN) shares did Michael A. Pisetsky sell and at what prices?

He sold a total of 3,134 common shares in three transactions. The reported weighted average sale prices were $16.7256, $16.8600, and $16.6992 per share, with trades executed within price ranges between $16.47 and $16.955 as detailed in the footnotes.

Does Michael A. Pisetsky still hold SI-BONE (SIBN) equity after these sales?

Yes. The disclosure notes that his holdings include 137,587 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 upon vesting and settlement, indicating ongoing equity exposure.

Were the SI-BONE (SIBN) share sales by Michael A. Pisetsky pre-planned or discretionary?

The filing states that the sales were required to satisfy tax withholding obligations from restricted stock unit vesting. It characterizes them as sell-to-cover transactions and explicitly notes they do not represent discretionary trades initiated by the reporting person.

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Available on EDGAR 07/06/2026 - 05:12 PM Accepted by SEC EDGAR 07/06/2026 - 05:11 PM Learn about SEC filing dates

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
Estimated average burden
hours per response:			0.5

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 CALIFORNIA 95050

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	07/02/2026		S(1)		1,799	D	$16.6992(2)	278,710	D
Common Stock	07/02/2026		S(1)		34	D	$16.86	278,676	D
Common Stock	07/02/2026		S(1)		1,301	D	$16.7256(3)	277,375(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 $16.48 USD to $16.955 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 $16.47 USD to $16.955 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 137,587 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	07/07/2026
	** 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.
* Form 4: SEC 1474 (03-26)