SI-BONE (SIBN) COO & CFO sells 11,636 shares under 10b5-1 plan

Rhea-AI Filing Summary

SI-BONE, Inc. (SIBN) reported that Anshul Maheshwari, its Chief Operating & Financial Officer, sold 11,636 shares of common stock on 2026-08-24 at a weighted-average price of $20.1075 per share under a Rule 10b5-1 trading plan dated December 17, 2025. After this sale, Maheshwari directly holds 223,284 shares, which include 167,604 shares issuable upon settlement of restricted stock units.

Insider Trade Summary 10b5-1

Net Seller: 11,636 shares

Net Sell 1 txn

Insider Maheshwari Anshul

Role Chief Op & Financial Officer

Sold 11,636 shs ($234K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1, F2, F3	11,636	$20.1075	$234K

Holdings After Transaction: Common Stock — 223,284 shares (Direct)

Footnotes (3)

1. F1. The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated December 17, 2025.
2. F2. The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $20.00 to $20.25, inclusive. The Reporting Person undertakes to provide the Issuer, any securityholder 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 these footnotes.
3. F3. Includes 167,604 shares issuable on settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one shares of the Issuer's common stock.

Key Figures

Shares sold: 11,636 shares of Common Stock Weighted-average sale price: $20.1075 per share Sale price range: $20.00 to $20.25 per share +3 more

6 metrics

Shares sold 11,636 shares of Common Stock Sale transaction on 2026-08-24 coded “S”

Weighted-average sale price $20.1075 per share Common Stock sale on 2026-08-24; multiple trades

Sale price range $20.00 to $20.25 per share Price range for multiple sale transactions included in the weighted average

Shares owned after transaction 223,284 shares Direct holdings of Anshul Maheshwari following the reported sale

RSUs included in holdings 167,604 shares issuable on settlement of restricted stock units Portion of post-transaction holdings represented by RSUs

Rule 10b5-1 trading plan date December 17, 2025 Plan under which the reported sale was effected

Key Terms

Rule 10b5-1 trading plan, weighted-average price, restricted stock units, contingent right

4 terms

Rule 10b5-1 trading plan regulatory

"The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted-average price financial

"The price reported in column 4 is a weighted-average price."

Weighted-average price is the average of multiple prices where each price is counted according to its size or importance—larger trades carry more weight than smaller ones, like averaging course grades by credit hours. It matters to investors because it gives a more realistic picture of the true price paid or received, helping assess trade execution, compare performance, calculate cost basis, and value positions more accurately than a simple average.

restricted stock units financial

"Includes 167,604 shares issuable on settlement of restricted stock units granted"

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.

contingent right financial

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

FAQ

What insider transaction did SI-BONE, Inc. (SIBN) disclose in this Form 4?

SI-BONE disclosed that Chief Operating & Financial Officer Anshul Maheshwari sold 11,636 shares of common stock on 2026-08-24 in a sale transaction coded “S,” reported as a sale in the open market or a private transaction.

At what price did the SIBN insider shares sell in this Form 4?

The filing reports a weighted-average price of $20.1075 per share. A footnote states the shares were sold in multiple transactions within a price range of $20.00 to $20.25 per share, inclusive.

How many SIBN shares does Anshul Maheshwari hold after this reported sale?

Following the reported sale, Anshul Maheshwari directly holds 223,284 shares of SI-BONE common stock. A footnote explains this total includes 167,604 shares issuable upon settlement of restricted stock units granted to him.

Was the SIBN insider sale made under a Rule 10b5-1 trading plan?

Yes. A footnote states that the sale reported was effected pursuant to a Rule 10b5-1 trading plan that was dated December 17, 2025. The filing also marks the Rule 10b5-1 affirmation checkbox as true.

How many SI-BONE (SIBN) shares were sold in total in this Form 4 transaction?

The Form 4 reports that 11,636 shares of SI-BONE common stock were sold in this single non-derivative transaction. The transaction summary also shows sellShares = 11,636 and a net-sell direction of shares.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/26/2026 - 07:05 PM Accepted by SEC EDGAR 08/26/2026 - 07:04 PM Learn about SEC filing dates

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).

X

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^*

Maheshwari Anshul

(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)
	Chief Op & Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/24/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/24/2026		S(1)		11,636	D	$20.1075(2)	223,284(3)	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale reported on this Form 4 was effected pursuant to a 10b5-1 trading plan dated December 17, 2025.

2. The price reported in column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $20.00 to $20.25, inclusive. The Reporting Person undertakes to provide the Issuer, any securityholder 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 these footnotes.

3. Includes 167,604 shares issuable on settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one shares of the Issuer's common stock.

Remarks:

	/s/ Michael Pisetsky, Attorney-in-Fact for Anshul Maheshwari	08/26/2026
	** 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)