[Form 4] SITIME Corp Insider Trading Activity

Rhea-AI Filing Summary

Insider transaction summary for SITM: Elizabeth A. Howe, Executive Vice President and Chief Financial Officer, reported a sale of 1,000 shares of SITIME Corp common stock on 09/18/2025 at a reported price of $298 per share.

After the sale she beneficially owns 65,070 shares, which includes 56,597 unvested restricted stock units and performance-based restricted stock units (40,008 time-vesting RSUs and 16,589 performance-based RSUs). The Form 4 was filed individually and indicates the transaction may have been made pursuant to a Rule 10b5-1 plan.

Insights

Financial Analyst

TL;DR: Routine insider sale of 1,000 shares; remaining holdings largely consist of unvested RSUs and performance awards.

The reported sale of 1,000 shares at $298 reduces the reporting person’s direct beneficial position to 65,070 shares. The filing discloses that the bulk of that position (56,597 shares) is tied up in unvested restricted stock units and performance-based restricted stock units, limiting immediate liquidity of the position. The transaction is marked as potentially pursuant to a Rule 10b5-1 plan, which, if accurate, signals a prearranged sale rather than discretionary trading.

Corporate Governance Expert

TL;DR: Disclosure aligns with standard Section 16 reporting: small executed sale and clear disclosure of unvested equity.

The Form 4 clearly identifies the reporting person’s role as EVP and CFO and reports the disposition and post-transaction beneficial ownership, including detailed breakdown of unvested RSUs and performance units. The explicit note on performance-based RSUs and the check indicating a Rule 10b5-1 plan support compliance with insider-trading and disclosure protocols. No amendments or multiple filers are indicated.

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
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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^*

Howe Elizabeth A.

(Last) (First) (Middle)

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)
	EVP, Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2025

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	09/18/2025		S		1,000	D	$298	65,070(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 56,597 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 40,008 restricted stock units that vest over time, and 16,589 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:

	Samsheer Ahamad, as Attorney-in-Fact	09/19/2025
	** 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 insider activity did SITM report on the Form 4?

Elizabeth A. Howe, EVP and CFO, reported a sale of 1,000 shares on 09/18/2025 at a reported price of $298 per share.

How many SITM shares does the reporting person beneficially own after the transaction?

The reporting person beneficially owns 65,070 shares following the reported transaction.

How much of the reporting person’s SITM holdings are unvested?

The filing states 56,597 shares are unvested, comprised of 40,008 time-vesting RSUs and 16,589 performance-based RSUs.

Was the transaction associated with a Rule 10b5-1 plan?

The Form 4 includes a checked box indicating the transaction was made pursuant to a contract or plan intended to satisfy Rule 10b5-1(c) affirmative-defense conditions.

Who filed the Form 4 on behalf of the reporting person?

The filing shows the form was signed by Samsheer Ahamad, as Attorney-in-Fact on 09/19/2025.