RMBS Form 144: Proposed sale of 9,824 shares

RMBS submitted a Form 144 disclosing a proposed sale of 9,824 shares of Common stock held by Morgan Stanley Smith Barney LLC Executive Financial Services.

Rhea-AI Filing Summary

RMBS submitted a Form 144 disclosing a proposed sale of 9,824 shares of Common stock held by Morgan Stanley Smith Barney LLC Executive Financial Services. The filing lists three restricted stock lots: 3,824 shares dated 04/01/2026, 2,972 shares dated 04/01/2025, and 3,028 shares dated 04/01/2023.

The filing shows the securities class as Common and identifies the holdings and grant dates; no entries appear under “Securities Sold During The Past 3 Months” in the provided excerpt.

Key Figures

Total shares listed for sale: 9,824 shares Lot — 04/01/2026: 3,824 shares Lot — 04/01/2025: 2,972 shares +2 more

5 metrics

Total shares listed for sale 9,824 shares sum of three restricted stock lots dated 04/01/2023–04/01/2026

Lot — 04/01/2026 3,824 shares Restricted stock grant dated 04/01/2026

Lot — 04/01/2025 2,972 shares Restricted stock grant dated 04/01/2025

Lot — 04/01/2023 3,028 shares Restricted stock grant dated 04/01/2023

Form date shown 05/08/2026 date listed near top of the excerpt

Key Terms

Form 144, Restricted Stock, Issuer, Securities Sold During The Past 3 Months

4 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock financial

"Securities To Be Sold | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Issuer regulatory

"Restricted Stock | Issuer"

Securities Sold During The Past 3 Months regulatory

"144: Securities Sold During The Past 3 Months"

FAQ

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

What does RMBS's Form 144 disclose about the sale?

It discloses a proposed sale of 9,824 shares of Common stock by Morgan Stanley Smith Barney LLC Executive Financial Services, listing three restricted stock lots dated 04/01/2026, 04/01/2025, and 04/01/2023

Who is identified as the holder proposing to sell RMBS shares?

The filing identifies Morgan Stanley Smith Barney LLC Executive Financial Services at 1 New York Plaza as the reporting holder. The excerpt lists that entity as the source of the restricted stock lots proposed for sale in the Form 144 notice.

How many restricted stock lots and share counts are listed in the filing?

The excerpt lists three restricted stock lots totaling 9,824 shares: 3,824 (04/01/2026), 2,972 (04/01/2025), and 3,028 (04/01/2023). These counts appear under “Securities To Be Sold.”

Does the Form 144 excerpt show recent sales in the prior three months?

No entries appear under “Securities Sold During The Past 3 Months” in the provided excerpt. The filing lists the proposed sale lots and grant dates but does not list any completed sales in that three‑month section.

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

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Accepted by SEC EDGAR 05/08/2026 - 04:10 PM Learn about SEC filing dates

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	0001338515
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	NECIP SAYINER
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	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	9824	1278888.32	108136967	05/08/2026	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	04/01/2026	Restricted Stock	Issuer			3824	04/01/2026	Not Applicable
Common	04/01/2025	Restricted Stock	Issuer			2972	04/01/2025	Not Applicable
Common	04/01/2023	Restricted Stock	Issuer			3028	04/01/2023	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	05/08/2026
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/ Necip Sayiner
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)