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See how Context works →On the price, the facts of the public record■Insider buy□Insider sell●Results filed
With an account, also○dividends▲splits◌next earningswith an account
End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.
Latest on record
The most recent facts, as filed.
Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.
- Oct 2, 2026Reported sale · Form 4CHARLES KISSNER · $555.0KOpen the filing ↗
- Oct 2, 2026Notice of sale · Form 144KISSNER CHARLES · Director · $555.0KOpen the filing ↗
- Sep 22, 2026Reported sale · Form 4CHARLES KISSNER · $525.0KOpen the filing ↗
In numbers
What this profile holds, counted.
Closes · 1 year250
SEC filings on record1,70716 flagged findings
Reported transactions (Form 4)44since May 15, 2023 · and 4 other holdings
Corporate events (8-K)30since Mar 16, 2021
What the record says
Description, identity and filings, each with its source.
Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.
What the company does
Rambus Inc. is an American technology company that designs, develops and licenses chip interface technologies and architectures that are used in digital electronics products. The company, founded in 1990, is well known for inventing RDRAM and for its intellectual property-based litigation following the introduction of DDR-SDRAM memory.
Source: Wikipedia (CC BY-SA 4.0) · copied on Sep 3, 2026 · may not reflect recent changes.
Regulatory history
Topics detected in its SEC reports, with the original excerpt.
Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.
- 2026-04-28capital return (buybacks/dividends)recentOpen filing ↗“…stock and stock units for the three months ended March 31, 2026: Nonvested Equity Stock and Stock Units Shares Weighted- Average…”
+1 more passage from the same document
- “…Shares Weighted- Average Grant-Date Fair Value Nonvested as of December 31, 2025 2,881,829 $ 51.91 Granted 25,498 $ 107.35 Vested (…”
- 2026-04-28Department of Justice inquiryrecentOpen filing ↗“…and may be subject to legal claims or regulatory matters involving consumer, stockholder class action and derivative, employment,…”
+1 more passage from the same document
- “…government proceedings could affect our business in materially negative ways. We have been and may be subject to legal claims or…”
- 2026-02-18share offering or dilution eventrecentOpen filing ↗“…remaining $ 10.4 million aggregate principal amount of its 1.375 % Convertible Senior Notes due 2023 (“the 2023 Notes”).…”
+1 more passage from the same document
- “…to the settlement of the convertible senior note hedges. The Company included dilutive instruments exercised during the period in the…”
- 2026-02-18capital return (buybacks/dividends)recentOpen filing ↗“…of our common stock. Since many of the shares of our common stock are held by brokers and other institutions on behalf of…”
+1 more passage from the same document
- “…accordance with our policies. As a part of our overall business strategy, from time to time we evaluate businesses and technologies…”
Original excerpts from SEC filings, untranslated. Not advice and not a prediction.
The 25 most recent filings (of 1,707)
Every SEC filing, newest first, with what it is. Below, each type with its own explanation.
- Oct 5, 26Form 4 ↗Insider transaction
- Oct 2, 26Form 144 ↗Notice of proposed sale
- Sep 24, 26Form 4 ↗Insider transaction
- Sep 22, 26Form 144 ↗Notice of proposed sale
- Sep 15, 26Form 3 ↗Insider transaction
- Sep 4, 268-K ↗Current report · A senior executive left or was appointed
- Aug 10, 26Form 4 ↗Insider transaction
- Aug 7, 26Form 144 ↗Notice of proposed sale
- Aug 5, 268-K ↗Current report · Entered a material agreement
- Jul 29, 26SCHEDULE 13G/A ↗Passive stake · BlackRock, Inc. · 12.2% · event on Jun 30, 26 · amendment
- Jul 28, 2610-Q ↗Quarterly report
- Jul 27, 268-K ↗Current report · Results
- Jun 5, 26SCHEDULE 13G ↗Passive stake · FMR LLC · 10.4% · event on May 29, 26
- Jun 3, 26Form 144 ↗Notice of proposed sale
- Jun 2, 26Form 144 ↗Notice of proposed sale
- Jun 2, 26Form 4 ↗Insider transaction
- Jun 1, 26Form 144 ↗Notice of proposed sale
- May 27, 26Form 4 ↗Insider transaction
Notice of proposed sale · 2 Form 144 filingsshow all 2hide
- May 26, 26Form 144 ↗Notice of proposed sale
- May 26, 26Form 144 ↗Notice of proposed sale
- May 22, 26Form 144 ↗Notice of proposed sale
1,707 filings on record, the oldest from Aug 4, 97.
Listing the 25 most recent filings of the 1,707 on record.
216763
- Sep 4, 26A senior executive left or was appointed8-K 5.02 ↗
- Aug 5, 26Entered a material agreement+2 more in the same filing8-K 1.01 ↗
3 senior executive changes2026show all 3hide
- Apr 29, 26A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Feb 12, 26A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Feb 10, 26A senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
- Dec 10, 24Entered a material agreement+1 more in the same filing8-K 1.01 ↗
- Mar 1, 24Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Feb 28, 24Auditor change filing (8-K Item 4.01)+1 more in the same filing8-K 4.01 ↗
- Sep 7, 23Completed an acquisition or disposal+1 more in the same filing8-K 2.01 ↗
- Aug 11, 23Entered a material agreement+2 more in the same filing8-K 1.01 ↗
- Aug 2, 23A senior executive left or was appointed8-K 5.02 ↗
- Jul 20, 23Entered a material agreement+1 more in the same filing8-K 1.01 ↗
- May 2, 23A senior executive left or was appointed+3 more in the same filing8-K 5.02 ↗
- Apr 4, 23Entered a material agreement+1 more in the same filing8-K 1.01 ↗
10 older filings not shown · The record reaches back to Jan 13, 05.
Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.
- Mar 16, 21Past accounts declared unreliable and being restated8-K 4.02 ↗
- Oct 19, 15Restructuring plan with committed costs+2 more in the same filing8-K 2.05 ↗
- Oct 18, 12Write-down of assets+2 more in the same filing8-K 2.06 ↗
- Aug 30, 12Restructuring plan with committed costs+1 more in the same filing8-K 2.05 ↗
- Aug 14, 08Restructuring plan with committed costs+1 more in the same filing8-K 2.05 ↗
- Oct 22, 07Listing notice (8-K 3.01)+1 more in the same filing8-K 3.01 ↗
- Sep 24, 07A debt obligation was accelerated8-K 2.04 ↗
- Aug 22, 07Listing notice (8-K 3.01)+1 more in the same filing8-K 3.01 ↗
- Aug 6, 07A debt obligation was accelerated8-K 2.04 ↗
- Jul 17, 07Listing notice (8-K 3.01)+1 more in the same filing8-K 3.01 ↗
The full record holds 21 stress filings.
Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.
Schedule 13G: short-form filing
The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.
- BlackRock, Inc.12.2%Jun 30, 26SCHEDULE 13G/A ↗1 earlier filing
- FMR LLC10.4%May 29, 26SCHEDULE 13G ↗2 co-filers on this document — the figure is the largest single stake, not their sum.
- Vanguard Portfolio Management6.2%Mar 31, 26SCHEDULE 13G ↗
- Invesco Ltd.6.0%Mar 31, 26SCHEDULE 13G ↗
- Vanguard Capital Management5.2%Mar 31, 26SCHEDULE 13G ↗
show one more holderhide
- T. Rowe Price Associates, Inc.3.1%Mar 31, 26SCHEDULE 13G/A ↗4 earlier filings
Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.
Sale intention announced
On Oct 2, KISSNER CHARLES filed notice of intent to sell up to $555K. It is filed under a scheduled plan (10b5-1), arranged in advance.
A notice is not a sale: it may not go ahead, may happen in part, or at a different price.
After the notice, they sold $555K on Oct 2, per their Form 4. That is 100% of the shares announced so far, and the window is still open.
View notice (Form 144) ↗+2 more recent notices · 2 with a later sale
- Oct 2, 26Sell$555KCHARLES KISSNER↗
- Sep 22, 26Sell$525KCHARLES KISSNER↗
- Aug 7, 26Sell$505KCHARLES KISSNER↗
- Jun 3, 26Sell$851KNecip Sayiner↗
- Jun 2, 26Sell$815KEmiko Higashi↗
- Jun 2, 26Sell$790KEmiko Higashi↗
- Jun 1, 26Sell$730KERIC B STANG↗
- May 26, 26Sell$5.7MXIANZHI SEAN FANEVP, COO↗
- May 26, 26Sell$15KXIANZHI SEAN FANEVP, COO↗
- May 26, 26Sell$788KEmiko Higashi↗
- May 22, 26Sell$144KJohn ShinnSVP, General Counsel↗
- May 8, 26Sell$1.3MNecip Sayiner↗
There are 9 more transactions in this stretch.
Stock compensation, tax and giftsshow the 19 other transactionshide
Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.
- May 1, 26Compensationamount n/aSumeet GagnejaSVP, CFO↗
- May 1, 26Compensationamount n/aSumeet GagnejaSVP, CFO↗
- Apr 3, 26Tax$104KJohn K AllenChief Accounting Officer↗
- Apr 1, 26Compensationamount n/aJohn K AllenChief Accounting Officer↗
- Apr 1, 26Tax$45KJohn K AllenChief Accounting Officer↗
- Apr 1, 26Tax$59KJohn K AllenChief Accounting Officer↗
- Apr 1, 26Compensationamount n/aXIANZHI SEAN FANEVP, COO↗
- Apr 1, 26Tax$892KXIANZHI SEAN FANEVP, COO↗
- Apr 1, 26Compensationamount n/aLuc SeraphinPresident and CEO↗
- Apr 1, 26Tax$1.1MLuc SeraphinPresident and CEO↗
- Apr 1, 26Compensationamount n/aJohn ShinnSVP, General Counsel↗
- Apr 1, 26Tax$172KJohn ShinnSVP, General Counsel↗
- Apr 1, 26Compensationamount n/aCHARLES KISSNER↗
- Apr 1, 26Compensationamount n/aVICTOR PENG↗
- Apr 1, 26Compensationamount n/aERIC B STANG↗
- Apr 1, 26Compensationamount n/aNecip Sayiner↗
- Apr 1, 26Compensationamount n/aMeera Rao↗
- Apr 1, 26Compensationamount n/aSTEVEN LAUB↗
- Apr 1, 26Compensationamount n/aEmiko Higashi↗
The full record holds 219 transactions and goes back to Feb 1, 23.
Its sector and its market
Rambus Inc. among Information Technology companies
The profile shows what is on record. Context and Radar place the company among those of its sector and region.
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Coverage
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Where each figure comes from and how far it reaches.
- Prices
- End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
- Series quality
- 250 clean closes in the period.
- SEC records
- 1,707 documents on file, from Aug 4, 1997 to Oct 5, 2026.
- Company description
- Wikipedia, read on Sep 3, 2026.
- This page
- Generated on Oct 19, 2026; refreshed through the day.
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Are the prices real time?
No. It is one close per session, from the provider and with the date shown on the profile; it does not update during the trading day.
Which SEC documents appear here?
Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.
Why does a European company show no SEC records?
It depends on the company: some European issuers file a 20-F or 6-K with the SEC and others don't. The profile shows whatever is on record; when there is nothing, it says so rather than guessing why. Europe does not yet have a common filing archive like EDGAR in the United States. The EU will open its own, ESAP, in July 2027 (managers' transactions arrive in January 2028), and we plan to add it once it is available.
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