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SEC Form 4 research

RAMBUS INC insider transactions

Inspect RAMBUS INC's public SEC insider acquisitions and sales, reporting owners and source receipts.

As of 2026-10-15T08:02:39.132Z

Issuer CIK
0000917273
Reporting owners
49
Officers and directors
32
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What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78.
In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Read one actual disclosure before using it

Show the table · 1 row, 7 columns

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2026-10-052026-10-02KISSNER CHARLESS5,000$111Not reported

First displayed source row from Recent insider disclosures. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-02 and its public availability date is 2026-10-05. Subtracting those calendar dates gives 3 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC accession 0001193125-26-413981 ↗SEC accession 0001193125-26-400762 ↗SEC accession 0001193125-26-342968 ↗

Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Show the table · 3 rows, 7 columns

Scroll sideways to compare all columns. Select a heading to sort.

2026-10-052026-10-02KISSNER CHARLESS5,000$111Not reported
2026-09-242026-09-22KISSNER CHARLESS5,000$105Not reported
2026-08-112026-08-07KISSNER CHARLESS5,000$100.92Not reported

Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Inspect all 34 displayed rows: Officers and directors in the directory

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HERSCHER PENNY000123201959
Rao Meera0001480603143
STANG ERIC B000123404565
LAUB STEVEN0001224180164
FAN XIANZHI SEAN000158384036
Kim Jae000157046562
Sayiner Necip000133851581
Seraphin Luc000134198475
Shinn John000184713719
BENTLEY J THOMAS00012316525
BLACK RONALD D00012227112
CHOU SUNLIN00011889241
DANFORTH JOHN D000119252715
DAVIDOW WILLIAM H000102762010
DONNELLY KEVIN000127687412
DUNLEVIE BRUCE0001190211178
EULAU ROBERT K000119252142
FARMWALD MIKE0001192504131
FISHER ELLIS THOMAS000163180910
Higashi Emiko000131808613
HOROWITZ MARK000119250878
HUGHES HAROLD00012433231
Jones Keith A00013479431
KISSNER CHARLES000118809534
LAVELLE THOMAS R000123225011
Lynch Desmond000194108510
MOORING DAVID G000119251525
PATEL SAMIR000127691014
Pickett Christopher M0001269894185
RISHI SATISH000121913713
Schroeder Michael C00012937221
SHRIGLEY DAVID A000118925911
SOFAER ABRAHAM D00012303118
STARK LAURA000127683754
HERSCHER PENNY ↗Rao Meera ↗STANG ERIC B ↗LAUB STEVEN ↗FAN XIANZHI SEAN ↗Kim Jae ↗Sayiner Necip ↗Seraphin Luc ↗Shinn John ↗BENTLEY J THOMAS ↗BLACK RONALD D ↗CHOU SUNLIN ↗DANFORTH JOHN D ↗DAVIDOW WILLIAM H ↗DONNELLY KEVIN ↗DUNLEVIE BRUCE ↗EULAU ROBERT K ↗FARMWALD MIKE ↗FISHER ELLIS THOMAS ↗Higashi Emiko ↗HOROWITZ MARK ↗HUGHES HAROLD ↗Jones Keith A ↗KISSNER CHARLES ↗LAVELLE THOMAS R ↗Lynch Desmond ↗MOORING DAVID G ↗PATEL SAMIR ↗Pickett Christopher M ↗RISHI SATISH ↗Schroeder Michael C ↗SHRIGLEY DAVID A ↗SOFAER ABRAHAM D ↗STARK LAURA ↗

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

Strategy eligibility is held while filing coverage is unresolved.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.