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Director at Rambus (NASDAQ: RMBS) receives 2,223 RSUs

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Rambus director Emiko Higashi received an equity grant of 2,223 shares of common stock in the form of restricted stock units (RSUs). The RSUs were awarded at no cash cost and will fully vest on April 1, 2027, or the first business day thereafter. Each RSU converts into one share of RMBS common stock upon vesting. Following this grant, Higashi directly holds 64,519 shares, reflecting ongoing use of stock-based compensation to align director interests with shareholders over the long term.

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Insider Higashi Emiko
Role Director
Type Security Shares Price Value
Grant/Award Common Stock 2,223 $0.00 --
Holdings After Transaction: Common Stock — 64,519 shares (Direct)
Footnotes (1)
  1. [object Object]
RSU grant size 2,223 RSUs Restricted stock units awarded to director on April 1, 2026
Post-transaction holdings 64,519 shares Common stock directly owned after the grant
RSU vesting date April 1, 2027 All RSUs vest on this date or first business day thereafter
Grant price per share $0.0000 Indicates compensation award, not a cash purchase
Acquire transactions 1 transaction Single grant/award acquisition reported in summary
restricted stock units financial
"The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
RSUs financial
"The shares are represented by restricted stock units, or RSUs, all of which vest April 1, 2027"
RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.
contingent right financial
"Each RSU represents the contingent right to receive one share of RMBS common stock"
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock04/01/2026A2,223(1)A$064,519D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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.
/s/Brian Wu, by power of attorney04/03/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR

FAQ

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

Director Emiko Higashi reported receiving a grant of 2,223 restricted stock units (RSUs) of Rambus common stock. These RSUs are a form of stock-based compensation that convert into shares over time, aligning director incentives with long-term shareholder value.

How many Rambus (RMBS) RSUs were granted to Emiko Higashi and when do they vest?

Emiko Higashi received 2,223 restricted stock units of Rambus common stock. All of these RSUs vest on April 1, 2027, or the first business day thereafter, meaning the shares are delivered only after that future vesting date is reached.

What does each restricted stock unit (RSU) granted to the Rambus director represent?

Each RSU granted to the Rambus director represents a contingent right to receive one share of RMBS common stock. The units do not become actual shares until they vest, providing long-term equity exposure instead of immediate tradable stock.

How many Rambus (RMBS) shares does Emiko Higashi hold after this RSU grant?

After the RSU grant of 2,223 units, Emiko Higashi is reported to directly own 64,519 shares of Rambus common stock. This figure reflects her position following the transaction as disclosed in the Form 4 insider trading report.

Was cash paid for the Rambus (RMBS) RSU grant reported by Emiko Higashi?

No cash was paid for this RSU grant; the transaction price per share is listed as 0.0000. This indicates the award is part of compensation rather than an open-market stock purchase funded with personal cash.