Were Michael Pisetsky’s SI-BONE (SIBN) share sales part of a trading plan?

The disclosure describes the transactions as a “sell to cover” arrangement for tax withholding on restricted stock units. It emphasizes they were required sales to satisfy tax obligations, rather than discretionary investment trades; no separate Rule 10b5-1 trading plan is mentioned in the provided text.

Tax-driven share sale by SI-BONE (SIBN) chief legal officer

Filing Impact

(Neutral)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

SI-BONE, Inc. senior vice president and chief legal officer Michael A. Pisetsky reported selling a total of 3,134 shares of common stock in open-market transactions on April 1–2, described as sales required to cover tax withholding on vesting restricted stock units under a “sell to cover” arrangement, rather than discretionary trades.

Sale prices ranged from about $12.55 to $13.09, with weighted averages around the reported prices. After these transactions, he holds 282,840 shares directly, which the disclosure states includes 151,034 shares issuable upon settlement of restricted stock units.

Insider Trade Summary

Net Seller: 3,134 shares ($40,466)

Net Sell 3 txns

Insider PISETSKY MICHAEL A.

Role SVP, Ops & Adm/Chief Legal Ofr

Sold 3,134 shs ($40K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,301	$12.8634	$17K
Sale	Common Stock	34	$12.61	$428.74
Sale	Common Stock	1,799	$12.9525	$23K

Holdings After Transaction: Common Stock — 282,874 shares (Direct)

Footnotes (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. This transaction was executed in multiple trades at prices ranging from $12.55 USD to $13.09 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. This transaction was executed in multiple trades at prices ranging from $12.545 USD to $13.08 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. Includes 151,034 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: 3,134 shares Sale price range (trade 1 footnote): $12.55–$13.09 per share Sale price range (trade 2 footnote): $12.545–$13.08 per share +2 more

5 metrics

Shares sold 3,134 shares Total common shares sold in tax-related transactions on April 1–2

Sale price range (trade 1 footnote) $12.55–$13.09 per share Price range for one set of April 2 trades; weighted average reported

Sale price range (trade 2 footnote) $12.545–$13.08 per share Price range for another group of trades with weighted average price

Shares held after transactions 282,840 shares Direct common stock ownership following reported sales

RSU-related shares included 151,034 shares Shares issuable upon settlement of restricted stock units included in holdings

Key Terms

restricted stock units, sell to cover, weighted average sale price, contingent right, +1 more

5 terms

restricted stock units financial

"tax withholding obligations in connection with the vesting of restricted stock units"

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

"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"

contingent right financial

"Each restricted stock unit represents a contingent right to receive one share"

open-market sale financial

"Sale in open market or private transaction"

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.

Form 4 Insider Transactions: What Each Field Means →

04/03/2026 - 06:09 PM

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)
04/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	04/01/2026		S⁽¹⁾		1,799	D	$12.9525⁽²⁾	284,175	D
Common Stock	04/02/2026		S⁽¹⁾		1,301	D	$12.8634⁽³⁾	282,874	D
Common Stock	04/02/2026		S⁽¹⁾		34	D	$12.61	282,840⁽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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 $12.55 USD to $13.09 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 $12.545 USD to $13.08 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 151,034 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	04/03/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What did SI-BONE (SIBN) executive Michael Pisetsky report in this Form 4?

He reported selling 3,134 shares of SI-BONE common stock. The filing explains these were required “sell to cover” transactions to pay tax withholding on vesting restricted stock units, rather than discretionary open-market sales based on personal investment views.

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

He sold 3,134 shares across three trades. Reported weighted average sale prices were around $12.86 and $12.95 per share, with individual trades executed in ranges from approximately $12.545 to $13.09, according to the transaction and accompanying price range footnotes.

Why were these SI-BONE (SIBN) shares sold by Michael Pisetsky?

The shares were sold to cover tax withholding obligations tied to vesting restricted stock units. The filing states the “sell to cover” structure satisfied those tax obligations and clarifies the transactions do not represent discretionary trades initiated for investment or portfolio management reasons.

How many SI-BONE (SIBN) shares does Pisetsky own after the reported sales?

After the transactions, he directly owns 282,840 shares of SI-BONE common stock. A footnote explains this figure includes 151,034 shares that will be issued upon settlement of restricted stock units, with each unit representing the right to receive one common share.