[Form 4] SiTime Corporation Insider Trading Activity

Rhea-AI Filing Summary

SiTime Corporation insider Lionel Bonnot, Executive Vice President, Worldwide Sales, reported a sale of common stock on 08/22/2025. The filing shows 1,990 shares were sold at a price of $223.50 per share. After the sale, Mr. Bonnot beneficially owned 77,933 shares, which includes 73,484 shares issuable under previously reported restricted stock units and performance-based restricted stock units that have not vested. The unvested awards consist of 27,932 time-vesting restricted stock units and 45,552 performance-based restricted stock units tied to absolute and relative stock-price performance. The filing indicates the transaction was made pursuant to a written plan intended to satisfy Rule 10b5-1(c).

Positive

• Transaction was executed under a 10b5-1 written plan, indicating pre-arranged trade terms
• Filing discloses detailed composition of unvested awards (27,932 time-based RSUs and 45,552 performance RSUs), improving transparency

Negative

• Executive disposed of 1,990 shares, reducing direct ownership
• Majority of post-transaction beneficial ownership is unvested (73,484 of 77,933 shares), which may not provide immediate alignment

Insights

Corporate Governance Expert

TL;DR: Insider sale disclosed under a 10b5-1 plan; large portion of holdings remain unvested and performance-contingent.

The Form 4 reports a routine open-market sale of 1,990 shares by an executive officer under a written plan, with the 10b5-1 box checked to assert affirmative defense. The filing transparently discloses remaining beneficial ownership and the composition of unvested awards, including time-based and performance-based RSUs. From a governance standpoint, documenting the plan and the split between vested and unvested awards supports clarity on alignment and compensation structure. No matters of noncompliance or unusual transactions are evident from this filing alone.

Financial Analyst

TL;DR: Executive sold 1,990 shares at $223.50; majority of reported holdings are unvested RSUs and performance awards.

The sale reduces the reporting person's direct holdings by 1,990 shares at $223.50 per share. The post-transaction beneficial ownership of 77,933 shares largely reflects unvested awards (73,484 shares), of which 45,552 are performance-based and contingent on stock-price metrics. For valuation or dilution analysis, note that most of the reported economic interest is not currently vested and therefore may vest only if performance conditions are met. This Form 4 provides clear, quantifiable data useful for share-count and executive compensation modeling.

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^*

Bonnot Lionel

(Last) (First) (Middle)

C/O SITIME CORPORATION

5451 PATRICK HENRY DR.

(Street)

SANTA CLARA CA 95054

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/22/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	08/22/2025		S		1,990	D	$223.5	77,933(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 73,484 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 27,932 restricted stock units that vest over time, and 45,552 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	08/26/2025
	** 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.

FAQ

What did the SiTime (SITM) Form 4 filed by Lionel Bonnot report?

The Form 4 reported a sale of 1,990 shares on 08/22/2025 at $223.50 per share and total beneficial ownership of 77,933 shares following the sale.

How many unvested restricted stock units does Lionel Bonnot have according to the filing?

73,484 unvested units in total, consisting of 27,932 time-vesting RSUs and 45,552 performance-based RSUs.

Was the sale executed under a 10b5-1 plan in the SITM Form 4?

Yes. The filing checks the box indicating the transaction was made pursuant to a written plan intended to satisfy Rule 10b5-1(c).

What price were the shares sold at in the Form 4?

The reported sale price was $223.50 per share.

Who signed the Form 4 and when was it signed?

The form was signed by Samsheer Ahamad, attorney-in-fact, on 08/26/2025.