SI-BONE trust proposes $648K sale of 29,665 shares

SI-BONE, Inc. is named as issuer in a notice listing a proposed sale of 29,665 common shares for the account of the Michael Pisetsky Separate Property Trust, with an aggregate market value of $647,586.95 and an approximate sale date of October 29, 2026.

Rhea-AI Filing Summary

SI-BONE, Inc. is named as issuer in a notice listing a proposed sale of 29,665 common shares for the account of the Michael Pisetsky Separate Property Trust, with an aggregate market value of $647,586.95 and an approximate sale date of October 29, 2026. Morgan Stanley Smith Barney LLC is listed as broker. Michael Andrew Pisetsky, identified as an officer, is listed for sales of 3,133 shares for $56,918.15 on October 2, 2026, and 3,725 shares for $69,411.03 on August 17, 2026. The shares to be sold were acquired upon vesting of restricted stock units from July 23, 2018, through October 1, 2025.

Key Figures

Proposed shares for sale: 29,665 shares Aggregate market value: $647,586.95 Shares outstanding: 44,818,575 shares +4 more

7 metrics

Proposed shares for sale 29,665 shares Common shares for the account of the Michael Pisetsky Separate Property Trust

Aggregate market value $647,586.95 Proposed sale

Shares outstanding 44,818,575 shares SI-BONE common shares listed in the securities information

Shares sold October 2, 2026 3,133 shares Sale listed for Michael Andrew Pisetsky

Sale value October 2, 2026 $56,918.15 Sale listed for Michael Andrew Pisetsky

Shares sold August 17, 2026 3,725 shares Sale listed for Michael Andrew Pisetsky

Sale value August 17, 2026 $69,411.03 Sale listed for Michael Andrew Pisetsky

Key Terms

Rule 144, Restricted Stock Units

2 terms

Rule 144 regulatory

"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.

Restricted Stock Units financial

"acquired upon 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.

FAQ

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

How many SIBN shares does the Michael Pisetsky Separate Property Trust propose to sell?

The notice lists 29,665 common shares for the trust’s account, with an aggregate market value of $647,586.95 and an approximate sale date of October 29, 2026.

What recent SIBN share sales by Michael Andrew Pisetsky are listed?

The listed sales are 3,133 shares for $56,918.15 on October 2, 2026, and 3,725 shares for $69,411.03 on August 17, 2026.

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

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Available on EDGAR 10/29/2026 - 04:21 PM EDT Accepted by SEC EDGAR 10/29/2026 - 04:21 PM EDT Learn about SEC filing dates

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	471 El Camino Real, Suite 101 Santa Clara CALIFORNIA 95050
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	29665	647586.95	44818575	10/29/2026	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			29665	07/23/2018	N/A

* 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
MICHAEL ANDREW PISETSKY 471 El Camino Real, Suite 101 Santa Clara CA 95050	Common	10/02/2026	3133	56918.15
MICHAEL ANDREW PISETSKY 471 El Camino Real, Suite 101 Santa Clara CA 95050	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 10/01/2025.
Date of Notice	10/29/2026
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)