SI-BONE insider plans $219K stock sale under Rule 144

SI-BONE, Inc. (SIBN) insider Anshul Maheshwari filed a notice of proposed sale of company common stock under Rule 144.

Rhea-AI Filing Summary

SI-BONE, Inc. (SIBN) insider Anshul Maheshwari filed a notice of proposed sale of company common stock under Rule 144. The notice covers 11,228 shares of common stock, with an indicated aggregate market value of $218,721.44. The shares were acquired upon vesting of restricted stock units and performance stock units during the period from 01/01/2025 through 02/15/2026. Prior sales under a 10b5-1 trading plan over the past three months totaled several thousand shares of SI-BONE common stock.

Key Figures

Shares proposed to be sold: 11,228 shares of common stock Aggregate market value of proposed sale: $218,721.44 Shares sold on 08/19/2026: 5,747 shares for $112,336.11 +4 more

7 metrics

Shares proposed to be sold 11,228 shares of common stock Securities information and securities-to-be-sold sections under Rule 144

Aggregate market value of proposed sale $218,721.44 Value associated with 11,228 shares of SI-BONE common stock

Shares sold on 08/19/2026 5,747 shares for $112,336.11 10b5-1 sales during the past 3 months

Shares sold on 08/17/2026 4,665 shares for $87,015.62 10b5-1 sales during the past 3 months

Shares sold on 07/02/2026 3,317 shares for $55,626.87 Sales during the past 3 months

Shares outstanding 44,818,575 shares Common stock figure listed with securities information as of 08/21/2026

Vesting period for RSUs/PSUs 01/01/2025 through 02/15/2026 Period when restricted and performance stock units vested

Key Terms

Rule 144, restricted stock units, performance stock units, 10b5-1

4 terms

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.

restricted stock units financial

"acquired upon the vesting of restricted stock units and performance 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.

performance stock units financial

"acquired upon the vesting of restricted stock units and performance stock units"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

10b5-1 regulatory

"10b5-1 Sales for ANSHUL MAHESHWARI"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

FAQ

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

What does the Form 144 filing disclose for SI-BONE, Inc. (SIBN)?

The filing discloses that insider Anshul Maheshwari has notified of a proposed sale of 11,228 shares of SI-BONE common stock under Rule 144, with an aggregate market value of $218,721.44, based on recent market prices.

How many SI-BONE (SIBN) shares are proposed to be sold in this Form 144?

The notice covers a proposed sale of 11,228 shares of SI-BONE, Inc. common stock. This amount appears consistently in both the main securities information and the securities-to-be-sold section of the filing.

What is the market value of the SI-BONE (SIBN) shares covered by this Form 144?

The filing lists an aggregate market value of $218,721.44 for the 11,228 shares of SI-BONE common stock proposed to be sold, based on the market price used in the Form 144 disclosure.

How were the SI-BONE (SIBN) shares in this Form 144 acquired?

The filing states that the securities to be sold were acquired upon the vesting of restricted stock units and performance stock units during the period from 01/01/2025 through 02/15/2026.

What SI-BONE (SIBN) insider trading activity occurred in the past 3 months?

The filing lists 10b5-1 plan sales of SI-BONE common stock by Anshul Maheshwari: 5,747 shares on 08/19/2026 for $112,336.11, 4,665 shares on 08/17/2026 for $87,015.62, and 3,317 shares on 07/02/2026 for $55,626.87.

On which market is SI-BONE (SIBN) common stock traded according to the Form 144?

The Form 144 identifies SI-BONE, Inc. common stock as traded on the NASDAQ market for the shares referenced in the proposed Rule 144 sale.

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

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Available on EDGAR 08/21/2026 - 04:34 PM EDT Accepted by SEC EDGAR 08/21/2026 - 04:33 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	0001853089
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	ANSHUL MAHESHWARI
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	11228	218721.44	44818575	08/21/2026	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	01/01/2025	RSU/PSU	Issuer			11228	01/01/2025	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
10b5-1 Sales for ANSHUL MAHESHWARI 471 El Camino Real, Suite 101 Santa Clara CA 95050	Common	08/19/2026	5747	112336.11
ANSHUL MAHESHWARI 471 El Camino Real, Suite 101 Santa Clara CA 95050	Common	08/17/2026	4665	87015.62
ANSHUL MAHESHWARI 471 El Camino Real, Suite 101 Santa Clara CA 95050	Common	07/02/2026	3317	55626.87

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units and performance stock units during the period of 01/01/2025 through 02/15/2026.
Date of Notice	08/21/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	12/17/2025
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/ Anshul Maheshwari
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)