Rambus director sells 10,000 shares in open trade

Rambus Inc. director Emiko Higashi reported selling a total of 10,000 shares of Common Stock in open-market transactions.

Rhea-AI Filing Summary

Rambus Inc. director Emiko Higashi reported selling a total of 10,000 shares of Common Stock in open-market transactions. The sales occurred on June 2, 2026, with 5,000 shares sold at $158.00 per share and 5,000 shares sold at $163.00 per share. Following these transactions, Higashi directly holds 49,519 shares of Rambus common stock, indicating she retains a substantial equity stake after the sale.

Insights

Equity ownership analyst

Director executes modest net share sale while retaining sizable Rambus stake.

Director Emiko Higashi conducted two open-market sales totaling 10,000 shares of Rambus Inc. common stock on June 2, 2026. The transactions were executed at prices of $158.00 and $163.00 per share, indicating a straightforward liquidity event.

After these sales, Higashi directly owns 49,519 shares of common stock, as shown in the filing. There are no remaining derivative positions listed, suggesting no options or similar instruments are disclosed in this report. Overall, the activity reflects a net-sell but leaves a meaningful continuing ownership position.

Insider Trade Summary

Net Seller: 10,000 shares

Net Sell 2 txns

Insider Higashi Emiko

Role Director

Sold 10,000 shs ($1.60M)

Type	Security	Shares	Price	Value
Sale	Common Stock	5,000	$163.00	$815K
Sale	Common Stock	5,000	$158.00	$790K

Holdings After Transaction: Common Stock — 49,519 shares (Direct)

Footnotes (2)

1. F1. All shares sold at an exact price of $163.00.
2. F2. All shares sold at an exact price of $158.00.

Key Figures

Shares sold: 10,000 shares Sale price lot 1: $158.00/share Sale price lot 2: $163.00/share +2 more

5 metrics

Shares sold 10,000 shares Total common stock sold on June 2, 2026

Sale price lot 1 $158.00/share 5,000-share open-market sale

Sale price lot 2 $163.00/share 5,000-share open-market sale

Shares held after transactions 49,519 shares Direct ownership following June 2, 2026 sales

Net buy/sell shares -10,000 shares Net-sell direction in transaction summary

Key Terms

open-market sale, Common Stock, transaction code "S", net-sell

4 terms

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

transaction code "S" regulatory

"transaction_code: S, Sale in open market or private transaction"

net-sell financial

"netBuySellDirection: net-sell"

FAQ

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

What did Rambus (RMBS) director Emiko Higashi report in this Form 4?

Emiko Higashi reported selling 10,000 Rambus shares. The Form 4 shows two open-market sales of Common Stock on June 2, 2026, totaling 10,000 shares, and confirms she continues to hold 49,519 shares directly after the transactions.

How many Rambus (RMBS) shares did Emiko Higashi sell and at what prices?

Higashi sold 10,000 shares in two equal blocks. She sold 5,000 shares at $158.00 per share and another 5,000 shares at $163.00 per share, all as open-market transactions reported in the Form 4 filing.

How many Rambus (RMBS) shares does Emiko Higashi hold after the reported sales?

Higashi directly holds 49,519 Rambus shares after the sales. The Form 4 lists this as her direct ownership position following the 10,000-share open-market disposal, indicating she maintains a significant remaining equity interest in the company.

Were Emiko Higashi’s Rambus (RMBS) transactions open-market sales?

Yes, both transactions are classified as open-market sales. The Form 4 uses transaction code “S” and describes each as an open-market sale of Common Stock, confirming these were standard market disposals rather than option exercises or private transfers.

Does the Rambus (RMBS) Form 4 show any option exercises or derivatives for Emiko Higashi?

No option exercises or derivative transactions are reported. The derivative section in the filing is empty, and the transaction summary shows only non-derivative open-market sales of Common Stock, with no remaining derivative positions disclosed.

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

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Accepted by SEC EDGAR 06/03/2026 - 06:10 PM Learn about SEC filing dates

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).

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 CALIFORNIA 95134

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	06/02/2026		S		5,000	D	$163(1)	54,519	D
Common Stock	06/02/2026		S		5,000	D	$158(2)	49,519	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 $163.00.

2. All shares sold at an exact price of $158.00.

	/s/Brian Wu, by power of attorney	06/03/2026
	** 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.
* Form 4: SEC 1474 (03-26)