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RMBS

Rambus Inc.

TechnologyRussell 2000

Rambus Inc. insider trading

Rambus Inc. files with the SEC as a Semiconductors & Related Devices company headquartered in San Jose, CA. Every time one of its executives or directors buys or sells the stock, the filing appears here the moment it reaches the SEC — with grants and option exercises set apart from the trades that cost the insider their own money.

From SEC filings

Recent RMBS insider transactions

9 insiders traded RMBS on the open market between Mar 02, 2026 and Aug 07, 2026 — 24 sales worth $16.8M, of which 14 were pre-scheduled under a 10b5-1 plan.

Bought
—
Sold
$16.8M

14 of 24 on a 10b5-1 plan

Net
−$16.8M
Insiders
9

Open-market purchases (code P) and sales (code S) from Rambus Inc.'s own SEC Form 4 filings. Grants and option exercises are excluded — they are compensation, not decisions. Share counts are derived from the reported value and price. Verify any figure against the original filing before acting on it; this is monitoring, not advice.

Filing history last read from EDGAR on Sep 23, 2026. The live dashboard shows new filings the moment they clear.

Every RMBS Form 4 on SEC.gov

SEC Form 4 data, Q3 2024 to Q2 2026

RMBS insider trading by quarter

Between Jul 01, 2024 and Jun 30, 2026, 9 insiders traded RMBS on the open market: 0 purchases and 58 sales worth $32M, 33 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 0 purchases and 40 sales ($23.1M), by 9 insiders.

QuarterBoughtSold
Q2 2026—−$13.3M15 sales · 5 on a plan
Q1 2026—−$5.2M12 sales · all on a plan
Q4 2025—−$1.9M5 sales · 3 on a plan
Q3 2025—−$2.6M8 sales · 2 on a plan
Q2 2025—−$2.5M9 sales · 6 on a plan
Q1 2025—−$6M7 sales · 5 on a plan
Q4 2024—−$458K2 sales
Q3 2024——
Largest sale
−$5.7M of RMBS by Fan Xianzhi Sean (EVP, COO) on May 26, 2026.

Open-market transactions through Jun 30, 2026most recent first

  • Fan Xianzhi Sean

    EVP, COO

    −$5.7M

    May 26, 2026

    37,814 sh · $151.69

  • Higashi Emiko

    Director

    −$787.9K

    May 26, 2026

    5,000 sh · $157.57

  • Laub Steven

    Director

    −$188.3K

    May 07, 2026

    1,500 sh · $125.52

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$239.6K

    Apr 02, 2026

    2,750 sh · $87.11

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$216K

    Apr 02, 2026

    2,511 sh · $86.04

  • Shinn John10b5-1

    SVP, General Counsel

    −$386.1K

    Mar 10, 2026

    4,356 sh · $88.64

  • Shinn John10b5-1

    SVP, General Counsel

    −$17.9K

    Mar 10, 2026

    200 sh · $89.55

  • Shinn John10b5-1

    SVP, General Counsel

    −$66.4K

    Mar 03, 2026

    700 sh · $94.89

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$1.3M

    Mar 02, 2026

    13,654 sh · $98.22

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$939K

    Mar 02, 2026

    9,469 sh · $99.17

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$703.6K

    Mar 02, 2026

    7,225 sh · $97.38

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$660K

    Mar 02, 2026

    6,587 sh · $100.20

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$160.9K

    Mar 02, 2026

    1,679 sh · $95.83

  • Seraphin Luc10b5-1

    President and CEO · Director

    −$132.1K

    Mar 02, 2026

    1,300 sh · $101.65

  • Lynch Desmond10b5-1

    SVP, CFO

    −$433.8K

    Feb 23, 2026

    4,273 sh · $101.53

From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.

Rambus Inc. company record

SEC industry classification
Semiconductors & Related Devices
Headquarters
San Jose, CA
Incorporated in
DE
Listed on
Nasdaq
SEC Central Index Key
0000917273

Sourced from this company's own SEC submissions record. The industry label is SEC's Standard Industrial Classification, which is more specific than the Technology sector shown above.

After insiders bought RMBS

What the stock actually did in the 90 days following each open-market purchase

Don't check RMBS — let it ping you

Get told the moment an insider moves on RMBS

Pro watches Rambus Inc. for you and sends a Telegram ping within moments of a Form 4 clearing EDGAR — a C-suite open-market buy, a cluster, a 10b5-1 regime break — long before it reaches the press. Add RMBS to a watchlist, see each mover's benchmark-measured track record and which legendary funds hold it, and read the full filing history instead of the last 72 hours.

Track RMBS on the live dashboardFilings on SEC.gov

The live dashboard is free to open. Alerts, watchlists, full filing history and each mover's benchmark-measured track record are Pro. Monitoring, not advice.

How to read RMBS insider activity

Open-market purchase (code P)
An insider spending their own money at market price. This is the only buy code that reliably carries signal — it is a decision, not compensation.
Grants and option exercises (codes A, M)
Scheduled compensation. Most "insider buying" headlines are really this, which is why InsiderPulse weights it at a fraction of a real purchase.
Cluster buy
Two or more different insiders buying on the open market in the same window. One executive buying can mean anything; three is much harder to explain away.

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This week on the tape: who actually chose to sellThe weekly split of scheduled 10b5-1 selling vs deliberate sales, with the deciders named.

Questions

Are RMBS insiders buying or selling?
Between Mar 02, 2026 and Aug 07, 2026, 9 Rambus Inc. insiders made no open-market purchases and 24 sales worth $16.8M, a net sale of $16.8M. 14 of the sales were pre-scheduled under a Rule 10b5-1 plan.
How much RMBS stock have insiders bought and sold in the last two years?
Between Jul 01, 2024 and Jun 30, 2026, 9 Rambus Inc. insiders made no open-market purchases and 58 sales worth $32M. 33 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: no purchases and 40 sales ($23.1M). The largest sale was Fan Xianzhi Sean selling $5.7M on May 26, 2026.
What was the largest recent RMBS insider trade?
Fan Xianzhi Sean (EVP, COO) sold $5.7M of RMBS stock on May 26, 2026 at about $151.69 a share.
When did an insider last buy RMBS shares?
No open-market purchase by a Rambus Inc. insider appears in the filings from Mar 02, 2026 to Aug 07, 2026 — every recorded open-market transaction in that period was a sale.
Where does RMBS insider trading data come from?
From the Form 4 filings Rambus Inc.'s officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.

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