SiTime officer settles taxes with 5,977 shares

SITIME Corp officer Lionel Bonnot reported a tax-related share disposition.

Rhea-AI Filing Summary

SITIME Corp officer Lionel Bonnot reported a tax-related share disposition. On May 20, 2026, 5,977 shares of common stock were delivered at $697 per share to cover exercise price or tax liabilities, a routine tax-withholding disposition rather than an open-market sale.

After this transaction, Bonnot directly holds 74,297 shares of SITIME common stock. This includes 65,813 unvested shares issuable from previously reported restricted stock units and performance-based restricted stock units, with 23,215 time-based RSUs and 42,598 performance-based RSUs tied to absolute and relative stock-price performance over various periods.

Insider Trade Summary

Exercise Price or Tax Liability: 5,977 shares

Exercise Price or Tax Liability 1 txn

Insider Bonnot Lionel

Role See Remarks

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	5,977	$697.00	$4.17M

Holdings After Transaction: Common Stock — 74,297 shares (Direct)

Footnotes (1)

1. F1. Includes an aggregate of 65,813 shares of common stock issuable pursuant to previously reported restricted stock units and performance-based restricted stock units that have not vested. These unvested units include 23,215 restricted stock units that vest over time, and 42,598 performance-based restricted stock units that vest based on certain absolute and relative price performance of the issuer's common stock over various performance periods.

Key Figures

Tax-withholding shares: 5,977 shares Price per share: $697 Shares after transaction: 74,297 shares +3 more

6 metrics

Tax-withholding shares 5,977 shares Common stock delivered for tax/payment on May 20, 2026

Price per share $697 Value used for the 5,977-share tax-withholding disposition

Shares after transaction 74,297 shares Total common shares held directly by Bonnot after disposition

Unvested equity awards 65,813 shares Shares issuable from unvested RSUs and performance-based RSUs

Time-based RSUs 23,215 units Restricted stock units that vest over time

Performance-based RSUs 42,598 units Units vesting on absolute and relative price performance

Key Terms

tax-withholding disposition, restricted stock units, performance-based restricted stock units, absolute and relative price performance

4 terms

tax-withholding disposition financial

"a routine tax-withholding disposition rather than an open-market sale"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

restricted stock units financial

"issuable pursuant to previously reported restricted stock units and performance-based 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.

performance-based restricted stock units financial

"42,598 performance-based restricted stock units that vest based on certain absolute and relative price performance"

Performance-based restricted stock units are a type of employee equity award that converts into company shares only if predefined financial or operational targets are met over a set period. Think of it like a bonus check that becomes stock only when specific goals are hit; it ties pay to results, aligning managers’ incentives with shareholders. Investors care because these awards affect future share count, executive incentives, and signal how management’s success will be measured and rewarded.

absolute and relative price performance financial

"vest based on certain absolute and relative price performance of the issuer's common stock"

FAQ

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

What insider transaction did SITIME (SITM) officer Lionel Bonnot report?

Lionel Bonnot reported a tax-withholding disposition of 5,977 SITIME common shares. These shares were delivered to cover exercise price or tax liabilities, rather than sold on the open market, and are classified under transaction code F.

How many SITIME (SITM) shares were used for Lionel Bonnot’s tax payment and at what price?

Bonnot used 5,977 shares of SITIME common stock at $697 per share to satisfy obligations. The Form 4 describes this as payment of exercise price or tax liability by delivering securities, not as an open-market share sale.

How many SITIME (SITM) shares does Lionel Bonnot hold after this Form 4 transaction?

Following the transaction, Bonnot directly holds 74,297 SITIME shares. This total includes both currently held shares and a substantial number of unvested restricted stock units and performance-based restricted stock units referenced in the footnote to the filing.

What unvested equity awards does Lionel Bonnot have in SITIME (SITM)?

Bonnot has 65,813 unvested shares issuable from equity awards. These comprise 23,215 time-based restricted stock units and 42,598 performance-based restricted stock units, which vest based on absolute and relative stock-price performance over specified periods.

Does Lionel Bonnot’s Form 4 show any open-market buying or selling of SITIME (SITM) shares?

The Form 4 shows no open-market purchases or sales. It reports only a transaction coded F, meaning shares were delivered to pay exercise price or tax liabilities, which is a routine administrative step in equity compensation.

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

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Accepted by SEC EDGAR 05/22/2026 - 08:16 AM 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^*

Bonnot Lionel

(Last) (First) (Middle)

C/O SITIME CORPORATION

5451 PATRICK HENRY DR.

(Street)

SANTA CLARA CALIFORNIA 95054

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SITIME Corp [ SITM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026

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	05/20/2026		F		5,977	D	$697	74,297(1)	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. Includes an aggregate of 65,813 shares of common stock issuable pursuant to previously reported restricted stock units and performance-based restricted stock units that have not vested. These unvested units include 23,215 restricted stock units that vest over time, and 42,598 performance-based restricted stock units that vest based on certain absolute and relative price performance of the issuer's common stock over various performance periods.

Remarks:

Executive Vice President, Worldwide Sales and Business Development

	Samsheer Ahamad, Attorney-in-fact	05/22/2026
	** 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)