Rambus director granted 2,223 RSUs

KISSNER CHARLES reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 04/03/2026 - 08:46 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

KISSNER CHARLES reported acquisition or exercise transactions in this Form 4 filing.

Rambus Inc. director Charles Kissner received an equity award of 2,223 restricted stock units (RSUs) of common stock. The RSUs were granted at no cash cost on April 1, 2026 and each unit represents the right to receive one RMBS share.

All 2,223 RSUs vest on April 1, 2027 or the first business day thereafter. Following this grant, Kissner directly holds 40,545 common shares, and an additional 18,747 shares are held indirectly through Kissner and Associates LLC, where he is the owner.

Insider Trade Summary

Grant/Award: 2,223 shares

Grant/Award 1 txn

Insider KISSNER CHARLES

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,223	$0.00	$0.00
Holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 40,545 shares (Direct); Common Stock — 18,747 shares (Indirect, See footnote)

Holdings Before and After: Common Stock, 38,322 to 40,545 shares (Direct)

Footnotes (2)

1. F1. The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.
2. F2. The shares are held directly by Kissner and Associates LLC for which the Reporting Person serves as the owner of the company.

Key Figures

RSUs granted: 2,223 RSUs Grant price: $0.00 per share RSU vesting date: April 1, 2027 +2 more

5 metrics

RSUs granted 2,223 RSUs Equity award on April 1, 2026

Grant price $0.00 per share RSU grant compensation, not market purchase

RSU vesting date April 1, 2027 All granted RSUs vest on this date

Direct holdings after grant 40,545 shares Common stock directly owned post-transaction

Indirect holdings 18,747 shares Held via Kissner and Associates LLC

Key Terms

restricted stock units, or RSUs, contingent right, indirect, Grant, award, or other acquisition

4 terms

restricted stock units, or RSUs financial

"The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027"

contingent right financial

"Each RSU represents the contingent right to receive one share of RMBS common stock"

indirect financial

"The shares are held directly by Kissner and Associates LLC for which the Reporting Person serves as the owner"

Grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

FAQ

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

What insider transaction did Rambus (RMBS) director Charles Kissner report?

Charles Kissner reported receiving 2,223 restricted stock units (RSUs) of Rambus common stock as an equity award. The grant carried no cash purchase price and reflects compensation, not an open-market share purchase or sale.

When do Charles Kissner’s 2,223 Rambus RSUs vest?

The 2,223 RSUs granted to Charles Kissner vest on April 1, 2027, or the first business day thereafter. Until vesting, they are contingent rights that will convert into an equal number of Rambus common shares at that time.

How many Rambus shares does Charles Kissner hold directly after this grant?

After the RSU grant, Charles Kissner directly holds 40,545 shares of Rambus common stock. This figure comes from the Form 4’s post-transaction ownership line for his direct, non-derivative common stock holdings.

What is the role of Kissner and Associates LLC in Rambus (RMBS) share ownership?

An additional 18,747 Rambus shares are held indirectly through Kissner and Associates LLC. The filing states Kissner serves as the owner of this company, so these shares are reported as indirect beneficial ownership on the Form 4.

Did Charles Kissner buy or sell Rambus shares on the market in this Form 4?

No open-market buys or sells are reported. The transaction is coded as a grant or award of 2,223 RSUs at a price of $0.00 per share, reflecting stock-based compensation rather than market trading activity.

What does each Rambus RSU granted to Charles Kissner represent?

Each restricted stock unit represents a contingent right to receive one share of Rambus common stock. After the vesting date in April 2027, the RSUs are expected to settle into an equal number of common shares for Kissner.

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

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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^*

KISSNER CHARLES

(Last) (First) (Middle)

C/O RAMBUS INC.

4453 NORTH FIRST STREET, 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)
04/01/2026

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	04/01/2026		A		2,223(1)	A	$0	40,545	D
Common Stock								18,747	I	See footnote(2)

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 shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027 or the first business day thereafter. Each RSU represents the contingent right to receive one share of RMBS common stock.

2. The shares are held directly by Kissner and Associates LLC for which the Reporting Person serves as the owner of the company.

	/s/ Brian Wu, by power of attorney	04/03/2026
	** 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)