Director Greg Hinckley adds 3,085 SI-BONE (SIBN) shares via options

Rhea-AI Filing Summary

SI-BONE, Inc. director Greg K. Hinckley exercised stock options to acquire 3,085 shares of common stock at an exercise price of $5.94 per share. Following the transaction, he directly owns 105,135 shares of common stock.

This direct holding figure includes 8,675 shares issuable upon settlement of restricted stock units, each representing a right to receive one share of common stock. A portion of the shares is held with his spouse as community property with right of survivorship. The option exercised was part of a grant that vested in equal monthly installments over three years beginning on October 17, 2018.

Insider Trade Summary

3,085 shares exercised/converted

Mixed 3 txns

Insider Hinckley Greg K

Role Director

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	3,085	$0.00	--
Exercise	Common Stock	3,085	$5.94	$18K
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 0 shares (Direct); Common Stock — 105,135 shares (Direct)

Footnotes (1)

1. Includes 8,675 shares issuable on the settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. Shares held by Gregory K. Hinckley and Mary C. Hinckley as Community Property with the Right of Survivorship. The shares subject to the option vest in equal monthly installments over three years commencing on October 17, 2018, subject to Reporting Person's continued service through each relevant vesting date.

Key Figures

Options exercised: 3,085 shares Exercise price: $5.94 per share Direct holdings after exercise: 105,135 shares +2 more

5 metrics

Options exercised 3,085 shares Stock Option (Right to Buy) exercised on 2026-04-07

Exercise price $5.94 per share Conversion of stock option into common stock

Direct holdings after exercise 105,135 shares Common stock directly owned following transaction

Restricted stock units included 8,675 shares Shares issuable upon RSU settlement included in holdings

Option vesting schedule 3 years monthly Equal monthly vesting starting October 17, 2018

Key Terms

Stock Option (Right to Buy), restricted stock units, community property with the right of survivorship

3 terms

Stock Option (Right to Buy) financial

"security_title: Stock Option (Right to Buy)"

restricted stock units financial

"Includes 8,675 shares issuable on the settlement 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.

community property with the right of survivorship financial

"Shares held by Gregory K. Hinckley and Mary C. Hinckley as Community Property with the Right of Survivorship"

Form 4 Insider Transactions: What Each Field Means →

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).

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^*

Hinckley Greg K

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/07/2026

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	04/07/2026		M		3,085	A	$5.94	105,135(1)	D
Common Stock								75,603	D(2)

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
Stock Option (Right to Buy)	$5.94	04/07/2026		M			3,085	(3)	03/01/2027	Common Stock	3,085	$0.00	0.00	D

Explanation of Responses:

1. Includes 8,675 shares issuable on the settlement of restricted stock units granted to the Reporting Person. Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

2. Shares held by Gregory K. Hinckley and Mary C. Hinckley as Community Property with the Right of Survivorship.

3. The shares subject to the option vest in equal monthly installments over three years commencing on October 17, 2018, subject to Reporting Person's continued service through each relevant vesting date.

Remarks:

	/s/ Michael A. Pisetsky, Attorney-in-Fact for Gregory K. Hinckley	04/09/2026
	** 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)

FAQ

What did SI-BONE (SIBN) director Greg Hinckley do in this Form 4?

Director Greg K. Hinckley exercised stock options to acquire 3,085 shares of SI-BONE common stock at $5.94 per share. This transaction converts a derivative award into actual shares as part of his equity compensation.

How many SI-BONE (SIBN) shares does Greg Hinckley hold after the transaction?

After exercising options, Greg K. Hinckley directly holds 105,135 shares of SI-BONE common stock. This total includes shares underlying restricted stock units and shares held as community property with his spouse.

What was the exercise price of Greg Hinckley’s SI-BONE (SIBN) options?

Greg K. Hinckley exercised stock options at an exercise price of $5.94 per share for 3,085 shares. This reflects the predetermined strike price of an existing option grant rather than an open-market purchase.

Are restricted stock units included in Greg Hinckley’s SI-BONE (SIBN) holdings?

Yes. Hinckley’s reported holdings include 8,675 shares issuable upon settlement of restricted stock units. Each unit represents a contingent right to receive one share of SI-BONE common stock, subject to the award’s vesting conditions.

How are some of Greg Hinckley’s SI-BONE (SIBN) shares held legally?

A portion of Greg K. Hinckley’s SI-BONE shares is held as community property with the right of survivorship with his spouse, Mary C. Hinckley, as disclosed in the footnotes to the Form 4 filing.

When did Greg Hinckley’s SI-BONE (SIBN) stock option begin vesting?

The option exercised by Greg K. Hinckley began vesting on October 17, 2018. It vested in equal monthly installments over three years, conditioned on his continued service through each relevant vesting date.