Rambus Inc
RMBS- Exchange
- Nasdaq
- Industry
- Semiconductors & Related Devices
- SEC CIK
- 0000917273
In the last 90 days, Rambus Inc insiders filed 0 open-market purchases and 2 sales; 620 institutions reported holding it in 13F filings for Q2 2026, worth $13.3B in total; superinvestors Duquesne Family Office and Maverick Capital hold it.
Key figures
- Insider buysOpen market, last 90 days
- 0
- Insider sellsLast 90 days, $1.03M in total
- 2
- 13F holdersQ2 2026, +71 vs. previous quarter
- 620
- 13F valueReported value at the end of Q2 2026
- $13.3B
- Superinvestors holdingAt the end of Q2 2026
- 2
Price chart
Superinvestors holding RMBS, Q2 2026
2 superinvestors report holding Rambus Inc on Form 13F. Percentages are the stock's share of each portfolio.
Duquesne Family Office
Stanley Druckenmiller
0.5%
Rambus Inc's share of the portfolio
- Shares
- 173,000
- Value
- $23.0M
Latest insider trades
Open-market purchases and sales by Rambus Inc insiders from Form 4, newest first.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Sep 24, 2026 (view filing)1:04 PM ET | Sep 22 | 2 days | Kissner CharlesDirector | SSale | −5.00K | $105.00 | −$525.0K | −36.4%8.75K after | 10b5-1 |
| Aug 10, 2026 (view filing)7:58 PM ET | Aug 7 | 3 days | Kissner CharlesDirector | SSale | −5.00K | $100.92 | −$504.6K | −26.7%13.7K after | 10b5-1 |
| Jun 3, 2026 (view filing) | Jun 3 | Same day | Sayiner NecipDirector | SSale | −5.00K | $170.15 | −$850.8K | −21.5%18.2K after | |
| Jun 3, 2026 (view filing) | Jun 2 | 1 day | Higashi EmikoDirector | SSale | −10.0K | $160.50 | −$1.60M | −16.8%49.5K after | 2 lots |
| Jun 2, 2026 (view filing) | Jun 1 | 1 day | Stang Eric BDirector | SSale | −5.00K | $146.00 | −$730.0K | −20.6%19.2K after | |
| May 27, 2026 (view filing) | May 26 | 1 day | Higashi EmikoDirector | SSale | −5.00K | $157.57 | −$787.9K | −7.7%59.5K after | |
| May 26, 2026 (view filing) | May 26 | Same day | Fan Xianzhi SeanEVP, COO | SSale | −37.9K | $151.69 | −$5.75M | −18.4%168.4K after | 2 lots |
| May 26, 2026 (view filing) | May 22 | 4 days | Shinn JohnSVP, General Counsel | SSale | −1.00K | $143.63 | −$143.6K | −4.5%21.1K after | |
| May 11, 2026 (view filing) | May 8 | 3 days | Sayiner NecipDirector | SSale | −9.82K | $130.18 | −$1.28M | −29.7%23.2K after | |
| May 11, 2026 (view filing) | May 7 | 4 days | Laub StevenDirector | SSale | −1.50K | $125.52 | −$188.3K | −16.6%7.52K after |
Top 10 13F holders, Q2 2026
The largest institutional positions in Rambus Inc at the end of Q2 2026; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 13,964,477 | $1.85B | 0.03% | −2,340,829−14.4% | Reduced |
| FMR LLC | 10,460,026 | $1.39B | 0.06% | +7,141,577+215.2% | Added |
| Invesco Ltd. | 6,632,458 | $880.4M | 0.07% | +133,410+2.1% | Added |
| Vanguard Portfolio Management LLC | 6,068,516 | $805.5M | 0.04% | −575,804−8.7% | Reduced |
| Vanguard Capital Management LLC | 4,874,385 | $647.0M | 0.01% | +46,531+1.0% | Added |
| State Street Corp | 3,915,113 | $519.5M | 0.02% | −458,504−10.5% | Reduced |
| Price T Rowe Associates Inc | 3,334,512 | $442.6M | 0.04% | −42,177−1.2% | Reduced |
| Geode Capital Management, LLC | 2,297,660 | $305.1M | 0.02% | −826,835−26.5% | Reduced |
| JPMorgan Chase & Co | 2,101,418 | $261.0M | 0.02% | +264,918+14.4% | Added |
| Dimensional Fund Advisors LP | 1,719,400 | $228.2M | 0.04% | −75,895−4.2% | Reduced |