[Form 4] Rambus Inc Insider Trading Activity

Rhea-AI Filing Summary

Rambus Inc. (RMBS) director Emiko Higashi reported a sale of 1,075 shares of Rambus common stock on 08/13/2025 at an exact price of $77.75 per share. After the sale, Higashi beneficially owns 62,296 shares, held directly. The Form 4 was signed under power of attorney by Brian Wu on 08/15/2025. The filing indicates the transaction code "S" (sale) and lists the reporting person as a director; no options, warrants, or other derivative transactions are reported in this filing.

Insights

Securities Analyst

TL;DR Director sold a small number of shares; ownership remains substantial and the trade appears routine.

The reported sale of 1,075 shares at $77.75 reduces Emiko Higashi's direct holdings to 62,296 shares. For a company-level holder, this size of sale is modest and the filing shows no derivative activity or plan-based purchase/sale flags. The disclosure meets Section 16 reporting requirements and provides transparency on insider trading activity without indicating broader governance or financial shifts.

Corporate Governance Expert

TL;DR Routine insider sale by a director, properly reported; no governance red flags in this Form 4.

The Form 4 identifies the reporting person as a director and documents a single non-derivative sale with exact price disclosure. The signature via power of attorney and timely filing suggest procedural compliance. There is no indication of accelerated sales, transfers to related parties, or changes in role that would signal governance concerns.

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
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

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^*

Higashi Emiko

(Last) (First) (Middle)

C/O RAMBUS INC

4453 NORTH FIRST ST, SUITE 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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/13/2025

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	08/13/2025		S		1,075	D	$77.75(1)	62,296	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. All shares sold at an exact price of $77.750000

	/s/Brian Wu, by power of attorney	08/15/2025
	** 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 was reported for RMBS on this Form 4?

Director Emiko Higashi sold 1,075 shares of Rambus common stock on 08/13/2025 at $77.75 per share.

How many Rambus shares does the reporting director own after the sale?

After the reported transaction the director beneficially owns 62,296 shares, held directly.

Was the transaction a sale or an acquisition in the Form 4?

The Form 4 shows a non-derivative sale (transaction code "S").

Who signed the Form 4 and when was it signed?

The Form 4 was signed by /s/ Brian Wu, by power of attorney on 08/15/2025.

Did the filing report any derivative securities or option exercises?

No. Table II lists no derivative securities, exercises, or related transactions in this filing.