Rambus notice of $525K planned share sale

A Rule 144 notice reports planned resale of 5,000 RMBS shares for $525,000 plus prior three‑month sales of 5,000 shares for $504,600.

Rhea-AI Filing Summary

RAMBUS INC (RMBS) is the issuer of common stock that Charles Kissner, through Kissner & Associates, LLC, has notified for resale under Rule 144. The notice covers 5,000 shares of common stock, with an indicated aggregate value of $525,000, to be sold through UBS Financial Services Inc. on NASDAQ.

The filer also reports that during the past three months, 5,000 shares of RAMBUS common stock were sold for aggregate proceeds of $504,600. UBS Financial Services Inc. signed the notice as attorney-in-fact for Charles Kissner on September 22, 2026.

Key Figures

Shares to be sold: 5,000 shares Aggregate value of planned sale: $525,000 Shares sold in past three months: 5,000 shares +3 more

6 metrics

Shares to be sold 5,000 shares Common stock to be sold under Rule 144 as reported in the notice

Aggregate value of planned sale $525,000 Indicated value of 5,000 RAMBUS INC common shares to be sold on NASDAQ

Shares sold in past three months 5,000 shares Common shares of RAMBUS INC sold on August 7, 2026

Proceeds from past three-month sales $504,600 Aggregate proceeds from 5,000 RAMBUS INC shares sold on August 7, 2026

Grant date of RSUs October 1, 2014 Date RSUs for the 5,000 shares were acquired from the issuer

Date of notice September 22, 2026 Date the Form 144 notice for the planned sale was filed

Key Terms

Rule 144, RSU, attorney-in-fact

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

RSU financial

"Common | 10/01/2014 | RSU | Issuer | | | 5000"

Restricted stock units (RSUs) are a form of company shares given to employees as part of their compensation, usually with certain restrictions or conditions, such as remaining with the company for a set period. When these restrictions lift, employees receive actual shares that they can sell or hold. For investors, RSUs can impact a company's stock supply and reflect the company's commitment to attracting and retaining talent.

attorney-in-fact regulatory

"Signature | /s/ UBS Financial Services Inc, as attorney-in-fact for Charles"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

What does the Form 144 filing disclose for RAMBUS INC (RMBS)?

It discloses that 5,000 shares of RAMBUS INC common stock are planned to be sold under Rule 144, with an aggregate value of $525,000, for the account of Charles Kissner through UBS Financial Services Inc. on NASDAQ.

Who is selling RMBS shares in this Form 144 notice and through whom?

The notice is filed for the account of Charles Kissner. The remarks state the shares are being sold by Kissner & Associates, LLC, and the broker handling the transaction is UBS Financial Services Inc.

How many RMBS shares are covered by the current Form 144 and what is the value?

The filing covers 5,000 shares of RAMBUS INC common stock with an indicated aggregate value of $525,000, to be sold on NASDAQ under Rule 144.

What RMBS shares were sold in the past three months under this Form 144 disclosure?

The filer reports that in the past three months, 5,000 shares of RAMBUS INC common stock were sold on August 7, 2026 for aggregate proceeds of $504,600.

What type of RMBS securities are involved in this Form 144 filing?

The securities are common stock of RAMBUS INC, originally acquired as RSUs on October 1, 2014 from the issuer, and are now being sold under Rule 144.

When was the Form 144 notice for RMBS shares signed and by whom?

The notice is dated September 22, 2026 and is signed “/s/ UBS Financial Services Inc, as attorney-in-fact for Charles Kissner.”

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

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Available on EDGAR 09/22/2026 - 04:03 PM Accepted by SEC EDGAR 09/22/2026 - 04:02 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	0001188095
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	KISSNER CHARLES
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	UBS Financial Services Inc. 11 Madison Avenue 4th Floor New York NY 10010	5000	525000.00	108461603	09/22/2026	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	10/01/2014	RSU	Issuer			5000	10/01/2014	N/A

* 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
Charles Kissner 4453 NORTH FIRST STREET Suite 100 San Jose CA 95134	Common	08/07/2026	5000	504600.00

144: Remarks and Signature

Remarks	The shares covered by this filing are being sold by Kissner & Associates, LLC
Date of Notice	09/22/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	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/ UBS Financial Services Inc, as attorney-in-fact for Charles Kissner
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)