RMBS
RAMBUS INC
Semiconductors & Related DevicesNasdaqLarge accelerated filer
Total Trades
78
Buys
0
Sells
70
Largest Trade
N/A
Insiders
10
Institutional Funds
471
Inst. Value
$1M+
Activist Filings
12
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Shinn John | SVP, General Counsel | SELL | $100K–$500K | 5K | $93.55 | Mar 4, 2026 |
| Seraphin Luc | President and CEO | SELL | $1M+ | 40K | $98.63 | Mar 4, 2026 |
| Lynch Desmond | SVP, CFO | SELL | $100K–$500K | 4K | $101.53 | Feb 24, 2026 |
| STANG ERIC B | Director | SELL | $500K+ | 9K | $106.54 | Nov 12, 2025 |
| Rao Meera | Director | SELL | $50K–$100K | 653 | $101.99 | Oct 2, 2025 |
| Lynch Desmond | SVP, CFO | SELL | $500K+ | 9K | $91.70 | Sep 16, 2025 |
| Sayiner Necip | Director | SELL | $500K+ | 8K | $85.63 | Sep 12, 2025 |
| Rao Meera | Director | SELL | $100K–$500K | 3K | $71.72 | Sep 4, 2025 |
| LAUB STEVEN | Director | SELL | $100K–$500K | 2K | $78.72 | Sep 2, 2025 |
| LAUB STEVEN | Director | SELL | $100K–$500K | 2K | $55.13 | May 28, 2025 |
| LAUB STEVEN | Director | SELL | $100K–$500K | 4K | $55.56 | May 20, 2025 |
| STANG ERIC B | Director | SELL | $100K–$500K | 4K | $51.13 | May 12, 2025 |
| Lynch Desmond | SVP, CFO | SELL | $100K–$500K | 3K | $50.31 | May 6, 2025 |
| Seraphin Luc | President and CEO | SELL | $100K–$500K | 8K | $46.64 | Apr 24, 2025 |
| Seraphin Luc | President and CEO | SELL | $100K–$500K | 10K | $47.79 | Apr 16, 2025 |
| Seraphin Luc | President and CEO | SELL | $100K–$500K | 10K | $46.81 | Apr 9, 2025 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 10K | $50.88 | Apr 3, 2025 |
| Seraphin Luc | President and CEO | GRANT | N/A | 55K | — | Apr 3, 2025 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 10K | $58.64 | Mar 26, 2025 |
| Shinn John | SVP, General Counsel | SELL | $100K–$500K | 8K | $55.73 | Mar 25, 2025 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 10K | $53.79 | Mar 19, 2025 |
| Shinn John | SVP, General Counsel | SELL | $100K–$500K | 8K | $52.98 | Mar 17, 2025 |
| Lynch Desmond | SVP, CFO | SELL | $100K–$500K | 4K | $53.27 | Mar 17, 2025 |
| Seraphin Luc | President and CEO | SELL | $100K–$500K | 6K | $58.66 | Apr 17, 2024 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 15K | $61.35 | Apr 10, 2024 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 15K | $59.93 | Apr 2, 2024 |
| Seraphin Luc | President and CEO | GRANT | N/A | 39K | — | Apr 2, 2024 |
| Shinn John | SVP, General Counsel | SELL | $100K–$500K | 4K | $62.71 | Mar 27, 2024 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 15K | $62.69 | Mar 27, 2024 |
| Shinn John | SVP, General Counsel | SELL | $100K–$500K | 4K | $58.84 | Mar 20, 2024 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 15K | $58.35 | Mar 20, 2024 |
| FAN XIANZHI SEAN | SVP, COO | SELL | $1M+ | 36K | $62.72 | Mar 4, 2024 |
| FAN XIANZHI SEAN | SVP, COO | SELL | $100K–$500K | 2K | $55.00 | Feb 21, 2024 |
| FAN XIANZHI SEAN | SVP, COO | SELL | $1M+ | 20K | $58.53 | Feb 13, 2024 |
| FAN XIANZHI SEAN | SVP, COO | SELL | $1M+ | 20K | $68.73 | Feb 6, 2024 |
| STANG ERIC B | Director | SELL | $500K+ | 9K | $67.16 | Nov 16, 2023 |
| LAUB STEVEN | Director | SELL | $100K–$500K | 2K | $66.91 | Nov 16, 2023 |
| Higashi Emiko | Director | SELL | $100K–$500K | 8K | $60.00 | Nov 9, 2023 |
| Sayiner Necip | Director | SELL | $500K+ | 10K | $57.43 | Nov 7, 2023 |
| Sayiner Necip | Director | EXERCISE | $100K–$500K | 10K | $13.94 | Nov 7, 2023 |
| FAN XIANZHI SEAN | COO | SELL | $500K+ | 17K | $54.99 | Aug 30, 2023 |
| STANG ERIC B | Director | SELL | $100K–$500K | 9K | $53.25 | Aug 17, 2023 |
| Seraphin Luc | President and CEO | SELL | $100K–$500K | 5K | $49.39 | May 16, 2023 |
| Seraphin Luc | President and CEO | EXERCISE | $50K–$100K | 4K | $12.84 | May 16, 2023 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 13K | $47.98 | May 9, 2023 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 13K | $44.83 | May 2, 2023 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 13K | $49.41 | Apr 25, 2023 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 13K | $49.58 | Apr 18, 2023 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 13K | $48.68 | Apr 11, 2023 |
| Seraphin Luc | President and CEO | SELL | $500K+ | 13K | $51.28 | Apr 4, 2023 |
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Institutional Ownership
13F filings as of Dec 31, 2025 · 471 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| STATE STREET CORP | 4.3M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4M | $1M+ | SH |
| ALLIANCEBERNSTEIN L.P. | 1.9M | $1M+ | SH |
| DIMENSIONAL FUND ADVISORS LP | 1.8M | $1M+ | SH |
| NORGES BANK | 1.7M | $1M+ | SH |
| CONGRESS ASSET MANAGEMENT CO | 1.4M | $1M+ | SH |
| EdgePoint Investment Group Inc. | 1.4M | $1M+ | SH |
| Swedbank AB | 1.4M | $1M+ | SH |
| Swedbank AB | 1.4M | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3M | $1M+ | SH |
| Neuberger Berman Group LLC | 1.2M | $1M+ | SH |
| BARCLAYS PLC | 1.0M | $1M+ | SH |
| Rafferty Asset Management, LLC | 936K | $1M+ | SH |
| AQR CAPITAL MANAGEMENT LLC | 704K | $1M+ | SH |
| EMERALD ADVISERS, LLC | 627K | $1M+ | SH |
| LORD, ABBETT & CO. LLC | 523K | $1M+ | SH |
| Fisher Asset Management, LLC | 517K | $1M+ | SH |
| LOOMIS SAYLES & CO L P | 512K | $1M+ | SH |
| CAISSE DE DEPOT ET PLACEMENT DU QUEBEC | 447K | $1M+ | SH |
| PANAGORA ASSET MANAGEMENT INC | 435K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Jan 21, 2026
14.0%
15.1M shares
T. Rowe Price Associates, Inc.
SC 13G/A · Aug 14, 2025
4.4%
4.7M shares
T. Rowe Price Associates, Inc.
SC 13G/A · May 14, 2025
8.1%
8.7M shares
T. Rowe Price Associates, Inc.
SC 13G · Feb 14, 2025
5.1%
5.4M shares
SC 13G/A · Nov 12, 2024
11.7%
12.6M shares
SC 13G/A · Nov 8, 2024
12.7%
13.7M shares
SC 13G/A · Nov 4, 2024
11.7%
12.6M shares
SC 13G/A · Oct 23, 2024
12.7%
13.7M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
10.6%
11.4M shares
SC 13G/A · Jan 23, 2024
14.4%
15.5M shares
SC 13G/A · Jan 27, 2022
15.7%
17.2M shares
SC 13G · Jan 25, 2022
15.7%
17.2M shares