SI-BONE director receives 10,957 stock unit grant

HILLEMAN JERYL L reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

HILLEMAN JERYL L reported acquisition or exercise transactions in this Form 4 filing.

SI-BONE, Inc. director Jeryl L. Hilleman received an equity grant in the form of 10,957 restricted stock units, each representing a contingent right to one share of common stock. The units were granted at $0.00 per share as director compensation, not an open-market purchase.

These restricted stock units will vest 100% on the earlier of the company’s next annual general meeting of stockholders or one year from the vesting commencement date, assuming continued board service. Following this award, Hilleman’s reported direct holdings total 43,772 shares of common stock, including the unvested units.

Insider Trade Summary

Grant/Award: 10,957 shares

Grant/Award 1 txn

Insider HILLEMAN JERYL L

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common stock	10,957	$0.00	$0.00

Holdings After Transaction: Common stock — 43,772 shares (Direct)

Footnotes (2)

1. F1. Reflects 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. The shares subject to the restricted stock unit will vest 100% upon the earlier of (i) the next annual general meeting of the stockholders of the Company or (ii) the date one year from the Vesting Commencement Date, subject to the Reporting Person's continuous service as a member of the Company's Board of Directors until such date.
2. F2. Includes 10,957 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.

Key Figures

RSUs granted: 10,957 units Grant price: $0.00 per share Shares after transaction: 43,772 shares +1 more

4 metrics

RSUs granted 10,957 units Restricted stock units awarded to director on June 4, 2026

Grant price $0.00 per share Stated price for restricted stock unit award

Shares after transaction 43,772 shares Director’s reported direct holdings following the award

Vesting condition 100% single-vesting event Earlier of next AGM or one year from vesting commencement date

Key Terms

restricted stock units, contingent right, vesting commencement date

3 terms

restricted stock units financial

"Reflects shares issuable on the settlement of restricted stock units granted to the Reporting Person."

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 share of the Issuer's common stock."

vesting commencement date financial

"the date one year from the Vesting Commencement Date, subject to the Reporting Person's continuous service"

The vesting commencement date is the starting point when an employee begins earning ownership rights to their promised benefits, such as stock options or retirement contributions. Think of it like the day a savings account is opened—only after this date do the benefits start to grow and become fully available over time. It matters to investors because it marks when the clock begins ticking toward full ownership, affecting the timing and value of these benefits.

FAQ

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

What did SI-BONE (SIBN) director Jeryl Hilleman report in this Form 4?

The filing shows Jeryl L. Hilleman received 10,957 restricted stock units as director compensation. Each unit converts into one SI-BONE common share upon vesting, increasing her reported direct holdings to 43,772 shares after the grant.

How many SI-BONE shares did Jeryl Hilleman acquire in this transaction?

Jeryl Hilleman was granted 10,957 restricted stock units, each linked to one share of SI-BONE common stock. This is a stock-based compensation award, not a cash purchase, and becomes actual shares only when the units vest under the award’s terms.

At what price were the SI-BONE restricted stock units granted to Jeryl Hilleman?

The 10,957 restricted stock units were granted at a stated price of $0.00 per share. This reflects that the award is stock-based compensation from the company’s equity plan, rather than an open-market purchase of SI-BONE shares for cash.

When do Jeryl Hilleman’s 10,957 SI-BONE restricted stock units vest?

The restricted stock units vest 100% on the earlier of SI-BONE’s next annual general meeting of stockholders or one year from the vesting commencement date. Vesting requires Hilleman’s continuous service on the company’s board until the applicable date.

How many SI-BONE shares does Jeryl Hilleman hold after this Form 4 transaction?

After the award, Hilleman’s reported direct holdings are 43,772 shares of SI-BONE common stock. This figure includes 10,957 shares issuable upon settlement of the newly granted restricted stock units, which remain subject to the vesting conditions described in the filing.

Is this SI-BONE Form 4 a market purchase or routine equity compensation?

The Form 4 reflects a routine equity compensation grant, not a market trade. Jeryl Hilleman received 10,957 restricted stock units as a director award at $0.00 per share, contingent on future vesting, rather than buying or selling shares on the open market.

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

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Accepted by SEC EDGAR 06/09/2026 - 02:50 PM EDT 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).

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^*

HILLEMAN JERYL L

(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)
06/04/2026

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	06/04/2026		A		10,957(1)	A	$0	43,772(2)	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. Reflects 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. The shares subject to the restricted stock unit will vest 100% upon the earlier of (i) the next annual general meeting of the stockholders of the Company or (ii) the date one year from the Vesting Commencement Date, subject to the Reporting Person's continuous service as a member of the Company's Board of Directors until such date.

2. Includes 10,957 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.

	/s/ Michael Pisetsky, Attorney-in-Fact for Jeryl L. Hilleman	06/09/2026
	** 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)