SI-BONE officer's trust proposes $861K share sale

The prior-sales table includes a 29,665-share trust sale identified as a 10b5-1 sale.

Available on EDGAR 11/04/2026 - 04:24 PM EST Accepted by SEC EDGAR 11/04/2026 - 04:23 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

SI-BONE, Inc. (SIBN) is named as issuer in a Form 144 notice identifying Michael Andrew Pisetsky as an officer and Michael Pisetsky Separate Property Trust as the account for a proposed sale of 36,241 common shares. Morgan Stanley Smith Barney LLC is listed as broker, and the proposed sale is listed for approximately November 4, 2026, at an aggregate market value of $861,448.57. The listed shares include 23,892 shares from restricted stock unit vesting and 12,349 shares from a cash exercise of stock options.

Key Figures

Proposed sale: 36,241 shares Aggregate market value: $861,448.57 Shares outstanding: 45,113,087 shares +4 more

7 metrics

Proposed sale 36,241 shares Common shares listed for sale; approximate sale date November 4, 2026

Aggregate market value $861,448.57 Proposed sale

Shares outstanding 45,113,087 shares Issuer share count listed in the securities information

Restricted stock units 23,892 shares Listed among securities to be sold

Stock option exercise 12,349 shares Listed among securities to be sold; cash payment indicated

Prior trust sale 29,665 shares Identified as a 10b5-1 sale on October 29, 2026

Aggregate market value $655,743.37 Prior trust sale on October 29, 2026

Key Terms

Restricted Stock Units, Exercise of Stock Options, 10b5-1 Sales, Rule 144

4 terms

Restricted Stock Units financial

"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.

Exercise of Stock Options financial

"Exercise of Stock Options"

10b5-1 Sales regulatory

"10b5-1 Sales for MICHAEL PISETSKY SEPARATE PROPERTY TRUST"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many SIBN shares are proposed for sale?

The proposed sale covers 36,241 common shares for the account of Michael Pisetsky Separate Property Trust. The listed aggregate market value is $861,448.57, and the approximate sale date is November 4, 2026; Morgan Stanley Smith Barney LLC is listed as broker.

How were the shares in the proposed SIBN sale acquired?

The listed shares include 23,892 shares from restricted stock units, with vesting dates spanning July 23, 2018, through January 1, 2026, and 12,349 shares from a cash exercise of stock options dated November 4, 2026.

What recent SIBN sales are listed for Michael Pisetsky and his trust?

A prior sale for the trust is identified as a 10b5-1 sale: 29,665 shares on October 29, 2026, valued at $655,743.37. Michael Andrew Pisetsky is also listed for sales of 3,133 shares on October 2, 2026, valued at $56,918.15, and 3,725 shares on August 17, 2026, valued at $69,411.03.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001754765
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	SI-BONE, INC.
SEC File Number	001-38701
Address of Issuer	88 West Plumeria Drive San Jose CALIFORNIA 95134
Phone	4082070700
Name of Person for Whose Account the Securities are To Be Sold	MICHAEL PISETSKY SEPARATE PROPERTY TRUST
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	36241	861448.57	45113087	11/04/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	07/23/2018	Restricted Stock Units	Issuer			23892	07/23/2018	N/A
Common	11/04/2026	Exercise of Stock Options	Issuer			12349	11/04/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for MICHAEL PISETSKY SEPARATE PROPERTY TRUST 88 West Plumeria Drive San Jose CA 95134	Common	10/29/2026	29665	655743.37
MICHAEL ANDREW PISETSKY 88 West Plumeria Drive San Jose CA 95134	Common	10/02/2026	3133	56918.15
MICHAEL ANDREW PISETSKY 88 West Plumeria Drive San Jose CA 95134	Common	08/17/2026	3725	69411.03

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 07/23/2018 through 1/1/2026.
Date of Notice	11/04/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/13/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Michael Pisetsky
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)