RMBS files Form 144 to sell 39,914 common shares

RMBS submitted a Form 144 notice showing proposed sales of common stock through Morgan Stanley Smith Barney LLC.

Accepted by SEC EDGAR 03/02/2026 - 04:17 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

RMBS submitted a Form 144 notice showing proposed sales of common stock through Morgan Stanley Smith Barney LLC. The notice lists 33,313 performance shares and 6,601 restricted shares with an entry date of 02/01/2026.

The filing records broker details and a filing date of 03/02/2026 on NASDAQ; it otherwise lists the securities types and quantities for the proposed dispositions.

FAQ

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

What does RMBS's Form 144 disclose?

The Form 144 discloses proposed sales of common stock through Morgan Stanley Smith Barney LLC. It lists 33,313 performance shares and 6,601 restricted shares with an entry date of 02/01/2026 and a filing date of 03/02/2026.

Who is the broker handling the RMBS transaction?

The broker named is Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, 8th Floor, New York, NY. The filing shows the broker as the intermediary for the proposed sales on NASDAQ as of 03/02/2026.

How many shares in total does the RMBS Form 144 list?

The notice lists a total of 39,914 common shares when combining the two line items: 33,313 performance shares plus 6,601 restricted shares, with an entry date of 02/01/2026 and a filing date of 03/02/2026.

Does RMBS state proceeds or pricing in the Form 144?

The excerpt does not include an aggregate proceeds amount or specific pricing for the proposed sales. The filing lists securities types and quantities but does not disclose sale price or intended proceeds in the provided text.

Does this Form 144 mean shares have already been sold?

No; the Form 144 is a notice of proposed sale under Rule 144. The filing lists intended dispositions dated 02/01/2026 with a filing date of 03/02/2026, but it does not state that the transactions have been completed in the provided excerpt.

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

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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	0001341984
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	RAMBUS INC.
SEC File Number	000-22339
Address of Issuer	4453 North First Street Suite 100 San Jose CALIFORNIA 95134
Phone	(408) 462-8000
Name of Person for Whose Account the Securities are To Be Sold	LUC SERAPHIN
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	Officer
Relationship to Issuer	Director

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	39914	3936697.86	107790732	03/02/2026	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	02/01/2026	Performance Shares	ISSUER			33313	02/01/2026	Not Applicable
Common	02/01/2026	Restricted Stock	ISSUER			6601	02/01/2026	Not Applicable

* 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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	03/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	11/11/2025
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	/s/ Luc Seraphin
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)