Rambus (RMBS) CFO Desmond Lynch executes 4,273-share planned stock sale

Rhea-AI Filing Summary

Rambus Inc. senior vice president and CFO Desmond Lynch sold 4,273 shares of common stock in an open-market transaction at $101.53 per share. The transaction was executed under a pre-arranged Rule 10b5-1 trading plan, and Lynch now holds 63,618 shares of Rambus common stock directly.

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
Estimated average burden
hours per response:			0.5

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^*

Lynch Desmond

(Last) (First) (Middle)

C/O RAMBUS INC

4453 N. FIRST ST, #100

(Street)

SAN JOSE CA 95134

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
RAMBUS INC [ RMBS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, CFO

3. Date of Earliest Transaction (Month/Day/Year)
02/23/2026

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	02/23/2026		S(1)		4,273	D	$101.53(2)	63,618	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. The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted on November 19, 2025.

2. All shares sold at $101.53

	/s/ Brian Wu, by power of attorney	02/24/2026
	** 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 transaction did Rambus (RMBS) disclose for CFO Desmond Lynch?

Rambus disclosed that CFO Desmond Lynch sold 4,273 shares of common stock. The sale was an open-market transaction at $101.53 per share under a Rule 10b5-1 plan, leaving him with 63,618 shares directly owned.

How many Rambus (RMBS) shares did the CFO sell and at what price?

The CFO sold 4,273 Rambus common shares at $101.53 each. This single open-market transaction reduced his direct holdings to 63,618 shares, according to the Form 4 insider trading report filed for the company.

Was the Rambus (RMBS) CFO stock sale under a Rule 10b5-1 plan?

Yes, the Rambus CFO’s sale was executed under a Rule 10b5-1 trading plan. The plan was adopted on November 19, 2025, and governed the open-market sale of 4,273 shares at a price of $101.53 per share.

How many Rambus (RMBS) shares does CFO Desmond Lynch still own after the sale?

After the reported sale, CFO Desmond Lynch directly owns 63,618 shares of Rambus common stock. This reflects a reduction of 4,273 shares from his prior position, as detailed in the company’s Form 4 insider trading disclosure.

What type of transaction was reported in the Rambus (RMBS) Form 4 filing?

The Form 4 reports an open-market sale of common stock by the CFO. It records 4,273 shares sold at $101.53 per share, categorized as a non-derivative transaction with direct ownership both before and after the trade.

Does the Rambus (RMBS) Form 4 indicate multiple insider trades by the CFO?

No, the Form 4 reflects a single reported transaction. It shows one open-market sale of 4,273 common shares at $101.53 per share, with the CFO’s direct holdings totaling 63,618 shares following this sale.