Quick Takeaways
- RMBS - RAMBUS INC has 16 insiders with reported activity on this page.
- Net insider value flow over the last year: -$11,918,888.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders
Insider Transactions Reported by 16 Insiders of RAMBUS INC
- Symbol
- RMBS on Nasdaq
- Location
- San Jose, CA
What Changed
- Buy value: ; sell value: $11,918,887.
- Net share flow: -130,573.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Source Evidence
Filed on Form 4
See Original Filing
Issuer insider activity is sourced from SEC Forms 3, 4, and 5.
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$11,918,888.
Buys
$0
Shares: 0
Insiders: 0
Sells
$11,918,888
Shares: 130,573
Insiders: 8
Net
-$11,918,888
Shares: -130,573
Insiders: -8
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 67,264 | $0 | $6,679,216 | -$6,679,216 |
| 3-6 | 0 | 9,000 | $0 | $958,900 | -$958,900 |
| 6-9 | 0 | 42,038 | $0 | $3,632,350 | -$3,632,350 |
| 9-12 | 0 | 12,271 | $0 | $648,421 | -$648,421 |
RAMBUS INC executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| James A. Mitarotonda | Director | $36,096,419 | Mixed | 01 Apr 2022 | ||
| Luc Seraphin | President and CEO, Director | $30,548,549 | -$4,406,884 | -13% | Filing P/S | 01 Apr 2026 |
| Xianzhi Sean Fan | Evp, Coo | $18,954,334 | Mixed | 01 Apr 2026 | ||
| Desmond Lynch | Svp, Cfo | $6,459,135 | -$2,343,775 | -27% | Filing P/S | 23 Feb 2026 |
| Emiko Higashi | Director | $5,928,650 | -$166,906 | -2.7% | Mixed | 01 Apr 2026 |
| Charles Kissner | Director | $5,448,341 | Mixed | 01 Apr 2026 | ||
| Keith A. Jones | Principal Accounting Officer | $3,630,502 | Mixed | 01 Mar 2022 | ||
| Sanjay Saraf | Director | $3,333,395 | Mixed | 01 Apr 2022 | ||
| Necip Sayiner | Director | $3,036,688 | -$1,193,674 | -28% | Mixed | 01 Apr 2026 |
| Meera Rao | Director | $2,709,463 | -$1,289,927 | -32% | Filing P/S | 14 Apr 2026 |
| Eric B. Stang | Director | $2,429,663 | -$1,145,678 | -32% | Mixed | 01 Apr 2026 |
| John Shinn | SVP, General Counsel | $2,031,871 | -$889,272 | -30% | Mixed | 01 Apr 2026 |
| John K. Allen | Chief Accounting Officer | $1,473,779 | Median | 03 Apr 2026 | ||
| Karen M. Rogge | Director | $1,152,068 | Mixed | 03 Apr 2023 | ||
| Steven Laub | Director | $828,755 | -$482,772 | -37% | Mixed | 01 Apr 2026 |
| Victor Peng | Director | $219,708 | Mixed | 01 Apr 2026 |
Top shareholders of RAMBUS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
|
Company |
14%
from 13D/G
|
16,275,186
|
$1,495,526,797 | — | 31 Dec 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
11%
|
12,290,929
|
$1,129,413,466 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13D/G
13F
|
T. Rowe Price Associates, Inc. · Company |
5%
|
5,385,603
|
$502,907,608 | +$64,638,850 | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
3.9%
|
4,251,563
|
$390,676,124 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
3.9%
|
4,148,653
|
$381,219,724 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.6%
|
2,842,715
|
$261,255,537 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
|
Company |
1.9%
|
2,065,343
|
$189,784,395 | — | 31 Dec 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
1.8%
|
1,900,308
|
$174,619,302 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.8%
|
1,893,528
|
$174,012,021 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
1.6%
|
1,701,551
|
$156,355,521 | — | 31 Dec 2025 | |
| FMR LLC |
13F
|
Company |
1.5%
|
1,587,029
|
$145,832,125 | — | 31 Dec 2025 | |
| CONGRESS ASSET MANAGEMENT CO |
13F
|
Company |
1.3%
|
1,410,615
|
$129,621,412 | — | 31 Dec 2025 | |
| EdgePoint Investment Group Inc. |
13F
|
Company |
1.3%
|
1,406,686
|
$129,260,377 | — | 31 Dec 2025 | |
| Swedbank AB |
13F
|
Company |
1.3%
|
1,363,000
|
$125,246,070 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
1.2%
|
1,327,693
|
$122,001,710 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
1.2%
|
1,315,551
|
$120,885,981 | — | 31 Dec 2025 | |
| Neuberger Berman Group LLC |
13F
|
Company |
1.2%
|
1,305,951
|
$120,147,476 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
1.2%
|
1,249,642
|
$114,829,604 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.1%
|
1,194,391
|
$109,752,560 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
1%
|
1,102,090
|
$101,271,050 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
1%
|
1,094,156
|
$100,542,005 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.95%
|
1,022,984
|
$94,002,000 | — | 31 Dec 2025 | |
| DRIEHAUS CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.89%
|
954,164
|
$87,678,130 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.87%
|
932,281
|
$87,096,531 | — | 31 Dec 2025 | |
| Rafferty Asset Management, LLC |
13F
|
Company |
0.87%
|
935,784
|
$85,989,192 | — | 31 Dec 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.87%
|
933,934
|
$85,819,195 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.82%
|
885,092
|
$81,331,344 | — | 31 Dec 2025 | |
| VOYA INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.67%
|
724,208
|
$66,547,473 | — | 31 Dec 2025 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.66%
|
711,126
|
$65,345,323 | — | 31 Dec 2025 | |
| Hood River Capital Management LLC |
13F
|
Company |
0.66%
|
708,846
|
$65,135,859 | — | 31 Dec 2025 | |
| LOOMIS SAYLES & CO L P |
13F
|
Company |
0.65%
|
700,333
|
$64,353,599 | — | 31 Dec 2025 | |
| T. Rowe Price Investment Management, Inc. |
13F
|
Company |
0.64%
|
687,840
|
$63,206,000 | — | 31 Dec 2025 | |
| EMERALD ADVISERS, LLC |
13F
|
Company |
0.58%
|
626,985
|
$57,613,652 | — | 31 Dec 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.53%
|
566,679
|
$52,070,951 | — | 31 Dec 2025 | |
| Allspring Global Investments Holdings, LLC |
13F
|
Company |
0.48%
|
522,226
|
$51,846,598 | — | 31 Dec 2025 | |
| LORD, ABBETT & CO. LLC |
13F
|
Company |
0.5%
|
539,028
|
$49,532,000 | — | 31 Dec 2025 | |
| Fisher Asset Management, LLC |
13F
|
Company |
0.48%
|
517,278
|
$47,532,711 | — | 31 Dec 2025 | |
| CITIGROUP INC |
13F
|
Company |
0.47%
|
502,540
|
$46,178,400 | — | 31 Dec 2025 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
0.45%
|
485,805
|
$44,640,622 | — | 31 Dec 2025 | |
| CANADA PENSION PLAN INVESTMENT BOARD |
13F
|
Company |
0.43%
|
466,600
|
$42,875,874 | — | 31 Dec 2025 | |
| OBERWEIS ASSET MANAGEMENT INC/ |
13F
|
Company |
0.43%
|
462,100
|
$42,462,369 | — | 31 Dec 2025 | |
| UBS Group AG |
13F
|
Company |
0.42%
|
455,670
|
$41,871,517 | — | 31 Dec 2025 | |
| CAISSE DE DEPOT ET PLACEMENT DU QUEBEC |
13F
|
Individual |
0.42%
|
447,309
|
$41,103,224 | — | 31 Dec 2025 | |
| PANAGORA ASSET MANAGEMENT INC |
13F
|
Company |
0.4%
|
434,703
|
$39,944,859 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.38%
|
411,719
|
$37,832,861 | — | 31 Dec 2025 | |
| James A. Mitarotonda |
3/4/5
|
Director |
—
class O/S missing
|
544,046
|
$36,096,419 | — | 01 Apr 2022 | |
| EMERALD MUTUAL FUND ADVISERS TRUST |
13F
|
Company |
0.36%
|
391,215
|
$35,948,746 | — | 31 Dec 2025 | |
| SEI INVESTMENTS CO |
13F
|
Company |
0.36%
|
386,745
|
$35,537,992 | — | 31 Dec 2025 | |
| JANUS HENDERSON GROUP PLC |
13F
|
Company |
0.35%
|
379,515
|
$34,873,866 | — | 31 Dec 2025 | |
| WESTFIELD CAPITAL MANAGEMENT CO LP |
13F
|
Company |
0.34%
|
362,092
|
$33,272,634 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for RAMBUS INC
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Meera Rao | RMBS | Common Stock | Sale | -27.1% | $1,008,167 | $118.08 | -8,538 | 22,946 | 14 Apr 2026 | Direct |
| John K. Allen | RMBS | Common Stock | Tax liability | -6.19% | -1,131 | 17,131 | 03 Apr 2026 | Direct | ||
| Luc Seraphin | RMBS | Common Stock | Sale | -1.55% | $470,188 | $86.65 | -5,426 | 345,767 | 02 Apr 2026 | Direct |
| Emiko Higashi | RMBS | Common Stock | Award | 3.57% | 2,223 | 64,519 | 01 Apr 2026 | Direct | ||
| Steven Laub | RMBS | Common Stock | Award | 32.7% | 2,223 | 9,019 | 01 Apr 2026 | Direct | ||
| Meera Rao | RMBS | Common Stock | Award | 7.6% | 2,223 | 31,484 | 01 Apr 2026 | Direct | ||
| Necip Sayiner | RMBS | Common Stock | Award | 7.21% | 2,223 | 33,047 | 01 Apr 2026 | Direct | ||
| Eric B. Stang | RMBS | Common Stock | Award | 2,223 | 2,223 | 01 Apr 2026 | Direct | |||
| Victor Peng | RMBS | Common Stock | Award | 1323.2% | 2,223 | 2,391 | 01 Apr 2026 | Direct | ||
| Charles Kissner | RMBS | Common Stock | Award | 5.8% | 2,223 | 40,545 | 01 Apr 2026 | Direct | ||
| John Shinn | RMBS | Common Stock | Tax liability | -7.96% | -1,913 | 22,112 | 01 Apr 2026 | Direct | ||
| John Shinn | RMBS | Common Stock | Award | 30.1% | 5,558 | 24,025 | 01 Apr 2026 | Direct | ||
| Luc Seraphin | RMBS | Common Stock | Tax liability | -3.45% | -12,561 | 351,193 | 01 Apr 2026 | Direct | ||
| Luc Seraphin | RMBS | Common Stock | Award | 9.87% | 32,684 | 363,754 | 01 Apr 2026 | Direct | ||
| Xianzhi Sean Fan | RMBS | Common Stock | Tax liability | -4.59% | -9,916 | 206,272 | 01 Apr 2026 | Direct | ||
| Xianzhi Sean Fan | RMBS | Common Stock | Award | 11.5% | 22,234 | 216,188 | 01 Apr 2026 | Direct | ||
| John K. Allen | RMBS | Common Stock | Tax liability | -5.94% | -1,153 | 18,262 | 01 Apr 2026 | Direct | ||
| John K. Allen | RMBS | Common Stock | Award | 16.7% | 2,779 | 19,415 | 01 Apr 2026 | Direct | ||
| John Shinn | RMBS | Common Stock | Sale | -19.8% | $404,008 | $88.68 | -4,556 | 18,467 | 10 Mar 2026 | Direct |
| John Shinn | RMBS | Common Stock | Sale | -16.5% | $426,319 | $93.55 | -4,557 | 23,023 | 03 Mar 2026 | Direct |
| Luc Seraphin | RMBS | Common Stock | Sale | -10.8% | $3,936,696 | $98.63 | -39,914 | 331,070 | 02 Mar 2026 | Direct |
| Victor Peng | RMBS | Common Stock | Award | 168 | 168 | 02 Mar 2026 | Direct | |||
| Desmond Lynch | RMBS | Common Stock | Sale | -6.29% | $433,838 | $101.53 | -4,273 | 63,618 | 23 Feb 2026 | Direct |
| Desmond Lynch | RMBS | Common Stock | Tax liability | -24.6% | -22,105 | 67,891 | 01 Feb 2026 | Direct | ||
| Desmond Lynch | RMBS | Common Stock | Award | 62.3% | 34,554 | 89,996 | 01 Feb 2026 | Direct | ||
| John Shinn | RMBS | Common Stock | Tax liability | -26.4% | -9,884 | 27,580 | 01 Feb 2026 | Direct | ||
| John Shinn | RMBS | Common Stock | Award | 85.6% | 17,276 | 37,464 | 01 Feb 2026 | Direct | ||
| Xianzhi Sean Fan | RMBS | Common Stock | Tax liability | -32.3% | -92,403 | 193,954 | 01 Feb 2026 | Direct | ||
| Xianzhi Sean Fan | RMBS | Common Stock | Award | 108.2% | 148,802 | 286,357 | 01 Feb 2026 | Direct | ||
| Luc Seraphin | RMBS | Common Stock | Tax liability | -20% | -92,523 | 370,984 | 01 Feb 2026 | Direct | ||
| Luc Seraphin | RMBS | Common Stock | Award | 45% | 143,744 | 463,507 | 01 Feb 2026 | Direct | ||
| Xianzhi Sean Fan | RMBS | Common Stock | Gift | -0.22% | -300 | 137,555 | 21 Nov 2025 | Direct | ||
| Xianzhi Sean Fan | RMBS | Common Stock | Gift | -0.22% | -300 | 137,855 | 19 Nov 2025 | Direct | ||
| Eric B. Stang | RMBS | Common Stock | Sale | -16.4% | $447,140 | $111.78 | -4,000 | 20,394 | 10 Nov 2025 | See Footnote |
| Eric B. Stang | RMBS | Common Stock | Sale | -17% | $511,760 | $102.35 | -5,000 | 24,394 | 07 Nov 2025 | See Footnote |
| Desmond Lynch | RMBS | Common Stock | Sale | -14.1% | $920,973 | $101.50 | -9,074 | 55,356 | 06 Oct 2025 | Direct |
| Meera Rao | RMBS | Common Stock | Sale | -2.18% | $66,599 | $101.99 | -653 | 29,261 | 01 Oct 2025 | Direct |
| Desmond Lynch | RMBS | Common Stock | Sale | -12.3% | $832,098 | $91.70 | -9,074 | 64,430 | 15 Sep 2025 | Direct |
| Necip Sayiner | RMBS | Common Stock | Sale | -19.6% | $642,226 | $85.63 | -7,500 | 30,824 | 11 Sep 2025 | Direct |
| Meera Rao | RMBS | Common Stock | Sale | -9.11% | $215,160 | $71.72 | -3,000 | 29,914 | 02 Sep 2025 | Direct |
| Desmond Lynch | RMBS | Common Stock | Tax liability | -3.57% | -2,725 | 73,504 | 01 Sep 2025 | Direct | ||
| Steven Laub | RMBS | Common Stock | Sale | -25% | $177,995 | $78.72 | -2,261 | 6,796 | 29 Aug 2025 | Direct |
| Emiko Higashi | RMBS | Common Stock | Sale | -1.7% | $83,581 | $77.75 | -1,075 | 62,296 | 13 Aug 2025 | Direct |
| Necip Sayiner | RMBS | Common Stock | Sale | -16.4% | $551,448 | $73.53 | -7,500 | 38,324 | 08 Aug 2025 | Direct |
| Emiko Higashi | RMBS | Common Stock | Sale | -1.72% | $83,325 | $75.00 | -1,111 | 63,371 | 04 Aug 2025 | Direct |
| John Shinn | RMBS | Common Stock | Sale | -3.77% | $58,945 | $74.61 | -790 | 20,188 | 04 Aug 2025 | Direct |
| Steven Laub | RMBS | Common Stock | Sale | -16.9% | $101,816 | $55.12 | -1,847 | 9,057 | 27 May 2025 | Direct |
| Steven Laub | RMBS | Common Stock | Sale | -25.1% | $202,961 | $55.56 | -3,653 | 10,904 | 19 May 2025 | Direct |
| Eric B. Stang | RMBS | Common Stock | Sale | -11% | $186,778 | $51.13 | -3,653 | 29,394 | 09 May 2025 | See Footnote |
| Desmond Lynch | RMBS | Common Stock | Sale | -3.95% | $156,867 | $50.31 | -3,118 | 75,798 | 05 May 2025 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.