SiTime (SITM) Form 144: Insider RSU Sale and Recent Insider Transactions

Rhea-AI Filing Summary

Form 144 notice for SiTime Corp (SITM): The filer notifies a proposed sale of 901 common shares through Stifel Nicolaus on 09/24/2025 with an aggregate market value of $287,400. The shares were acquired on 05/20/2025 as RSUs from SiTime Corp and paid via net exercise on the same date. The filing also discloses recent sales by the same person, Elizabeth Howe: 1,000 shares on 09/18/2025 for $298,000, 2,500 shares on 09/15/2025 for $678,400, and 1,500 shares on 08/06/2025 for $312,000. The form includes the standard representation that the seller is not aware of undisclosed material adverse information.

Positive

• Planned sale fully disclosed with broker, date, quantity, and aggregate market value
• Acquisition details provided: shares were RSUs from SiTime Corp with payment noted as net exercise

Negative

• Multiple recent insider sales totaling 5,000 shares in the past three months with gross proceeds of $1,288,400
• No indication of 10b5-1 plan or plan adoption date provided in the filing

Insights

Securities/Equity Analyst

TL;DR Disclosure shows a planned small sale of recently vested RSUs and several recent sales by the same individual.

The filing reports a proposed sale of 901 common shares valued at $287,400, acquired as RSUs on 05/20/2025 and to be sold via Stifel Nicolaus on 09/24/2025. The seller, identified in past sales as Elizabeth Howe, sold 5,000 shares across three transactions in the past two months, generating gross proceeds totaling $1,288,400. For investors, these disclosures are routine insider liquidity events and provide transparency into insider selling activity; they do not on their own disclose company operational performance or material corporate developments.

Compliance / Corporate Governance Specialist

TL;DR Filing appears procedurally complete for a Rule 144 sale of RSU-derived shares with standard seller attestations.

The form identifies the acquisition method (RSUs), payment method

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Stifel Nicolaus 501 N Broadway St Louis MO 63201	901	287400.00	26000000	09/24/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/20/2025	RSUs	SiTime Corp			901	05/20/2025	net exercise

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Elizabeth Howe 5451 Patrick Henry Dr Santa Clara CA 95054	Common	09/18/2025	1000	298000.00
Elizabeth Howe 5451 Patrick Henry Dr Santa Clara CA 95054	Common	09/15/2025	2500	678400.00
Elizabeth Howe 5451 Patrick Henry Dr Santa Clara CA 95054	Common	08/06/2025	1500	312000.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the Form 144 filed for SITM disclose?

The notice discloses a proposed sale of 901 common shares via Stifel Nicolaus on 09/24/2025 valued at $287,400, acquired as RSUs on 05/20/2025 and paid by net exercise.

Who sold shares in the past three months according to this filing?

Elizabeth Howe sold 1,000 shares on 09/18/2025 for $298,000, 2,500 shares on 09/15/2025 for $678,400, and 1,500 shares on 08/06/2025 for $312,000.

Was the acquisition method of the shares disclosed?

Yes. The 901 shares were acquired on 05/20/2025 as RSUs from SiTime Corp and paid via net exercise the same day.

Does the filing state whether a 10b5-1 trading plan was used?

No. The filing does not indicate a date of plan adoption or reliance on a 10b5-1 trading plan.

Which broker is handling the proposed sale?

The broker listed is Stifel Nicolaus, 501 N Broadway, St. Louis, MO and the exchange listed is NASDAQ.