SI-BONE trust plans sale of 25,972 common shares

SI-BONE, Inc. (SIBN) is the issuer for a planned sale of its common stock reported by the DAVID & LAURA FRANCIS JOINT REV TRU/A DTD 01/03/2003 under Rule 144.

Rhea-AI Filing Summary

SI-BONE, Inc. (SIBN) is the issuer for a planned sale of its common stock reported by the DAVID & LAURA FRANCIS JOINT REV TRU/A DTD 01/03/2003 under Rule 144. The trust has filed to sell 25,972 shares of common stock that were acquired upon vesting of restricted stock units beginning 05/15/2021.

The notice also lists recent sales over the past three months, including Rule 10b5-1 plan transactions by the trust and separate sales by Laura Francis.

Key Figures

Shares to be sold under Form 144: 25,972 shares of common stock 10b5-1 sale on 08/21/2026: 3,923 shares for $78,556.90 10b5-1 sale on 08/20/2026: 51,884 shares for $1,009,558.87 +3 more

6 metrics

Shares to be sold under Form 144 25,972 shares of common stock Planned sale by DAVID & LAURA FRANCIS JOINT REV TRU/A under Rule 144

10b5-1 sale on 08/21/2026 3,923 shares for $78,556.90 Rule 10b5-1 sale by DAVID & LAURA FRANCIS JOINT REV TRU/A

10b5-1 sale on 08/20/2026 51,884 shares for $1,009,558.87 Rule 10b5-1 sale by DAVID & LAURA FRANCIS JOINT REV TRU/A

Sale by Laura Francis on 08/17/2026 14,956 shares for $279,064.67 Sale of SI-BONE common stock during past three months

Acquisition period for RSU shares 05/15/2021 to 11/15/2025 Period during which restricted stock units vested and produced the shares

Date of Notice 08/24/2026 Date on which the Form 144 notice was given

Key Terms

Rule 144, restricted stock units, 10b5-1, Form 144, +1 more

5 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

"The securities to be sold were 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.

10b5-1 regulatory

"10b5-1 Sales for DAVID & LAURA FRANCIS JOINT REV TRU/A"

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.

Form 144 regulatory

"144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

common stock financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What is being reported for SI-BONE, Inc. (SIBN) in this Form 144?

The filing reports that the DAVID & LAURA FRANCIS JOINT REV TRU/A intends to sell 25,972 shares of SI-BONE, Inc. common stock under Rule 144, with the shares having been acquired through vesting of restricted stock units starting on 05/15/2021.

How many SI-BONE (SIBN) shares are proposed to be sold under this notice?

The notice covers a proposed sale of 25,972 shares of SI-BONE, Inc. common stock by the DAVID & LAURA FRANCIS JOINT REV TRU/A DTD 01/03/2003, acquired from restricted stock units vesting between 05/15/2021 and 11/15/2025.

What recent 10b5-1 plan sales related to SIBN are disclosed?

Recent Rule 10b5-1 sales by the DAVID & LAURA FRANCIS JOINT REV TRU/A include 3,923 shares for $78,556.90 on 08/21/2026 and 51,884 shares for $1,009,558.87 on 08/20/2026. These are prior sales in the past three months.

Are there other recent SI-BONE (SIBN) insider-related sales disclosed?

Yes. In addition to trust sales, Laura Francis is listed with a sale of 14,956 shares of SI-BONE common stock for $279,064.67 on 08/17/2026, disclosed as a sale during the past three months.

How were the SIBN shares to be sold originally acquired?

The shares covered by this Form 144 were acquired upon the vesting of restricted stock units in the period from 05/15/2021 through 11/15/2025, as stated in the remarks section signed by Laura Francis.

On which market is the SI-BONE (SIBN) stock listed in this filing?

The common stock referenced in this Form 144 for SI-BONE, Inc. is identified as being traded on NASDAQ, as indicated in the securities information section of the notice.

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Available on EDGAR 08/24/2026 - 04:29 PM EDT Accepted by SEC EDGAR 08/24/2026 - 04:28 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	0001218802
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	DAVID & LAURA FRANCIS JOINT REV TRU/A DTD 01/03/2003
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	Director
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	25972	518401.12	44818575	08/24/2026	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	05/15/2021	Restricted Stock Units	Issuer			25972	05/15/2021	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 DAVID & LAURA FRANCIS JOINT REV TRU/A DTD 01/03/2003 471 El Camino Real, Suite 101 Santa Clara CA 95050	Common	08/21/2026	3923	78556.90
10b5-1 Sales for DAVID & LAURA FRANCIS JOINT REV TRU/A DTD 01/03/2003 471 El Camino Real, Suite 101 Santa Clara CA 95050	Common	08/20/2026	51884	1009558.87
LAURA FRANCIS 471 El Camino Real, Suite 101 Santa Clara CA 95050	Common	08/17/2026	14956	279064.67

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 05/15/2021 through 11/15/2025.
Date of Notice	08/24/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/21/2026
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/ Laura Francis
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)