RAMBUS INC DEL (RMBS): Ownership & Insider Activity
Hedge funds and institutional managers reporting a position in RMBS · Information Technology. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.
Reported Holders
27
13F filers
Aggregate Value
$839.6M
Across holders
Last Price
$87.07
2026-08-24
Sector
Information Technology
GICS
Quarterly fund activity16 increased9 reduced3 exited
| Manager⇅ | Type⇅ | Shares⇅ | Market Value▼ | % of Total⇅ | % of Portfolio⇅ | Action⇅ | QoQ Change⇅ | Quarter⇅ |
|---|---|---|---|---|---|---|---|---|
| AQR CAPITAL MANAGEMENT LLC CIK 0001167557 | Hedge Fund | 1.21M | $152.5M | 18.2% | 0.1% | Reduced | +$150.9M | Q2 2026 |
| EdgePoint Investment Group Inc. CIK 0001481669 | Hedge Fund | 1.09M | $144.2M | 17.2% | 1.1% | Reduced | $-114.4M | Q2 2026 |
| SHAW D E & CO INC CIK 0001009207 | Hedge Fund | 740K | $98.2M | 11.7% | 0.0% | Added | +$96.2M | Q2 2026 |
| Fisher Asset Management, LLC CIK 0000850529 | Institutional Manager | 706K | $93.7M | 11.2% | 0.0% | Reduced | $-4.3M | Q2 2026 |
| Clearbridge Investments, LLC CIK 0001348883 | Hedge Fund | 590K | $78.3M | 9.3% | 0.1% | Added | +$846K | Q2 2026 |
| MILLENNIUM MANAGEMENT LLC CIK 0001273087 | Hedge Fund | 473K | $62.8M | 7.5% | 0.0% | Added | +$44.0M | Q2 2026 |
| CITADEL ADVISORS LLC CIK 0001423053 | Hedge Fund | 400K | $53.1M | 6.3% | 0.0% | Added | +$39.4M | Q2 2026 |
| TWO SIGMA INVESTMENTS, LP CIK 0001179392 | Hedge Fund | 223K | $29.6M | 3.5% | 0.0% | Added | +$19.3M | Q2 2026 |
| Duquesne Family Office LLC CIK 0001536411 | Family Office | 173K | $23.0M | 2.7% | 0.4% | Added | — | Q2 2026 |
| TUDOR INVESTMENT CORP ET AL CIK 0000923093 | Hedge Fund | 157K | $20.9M | 2.5% | 0.0% | Added | — | Q2 2026 |
Reduced
Hedge Fund
$152.5M· 18.2% of total· 0.1% port· 1.21M sh· +$150.9M QoQ· Q2 2026
Reduced
Hedge Fund
$144.2M· 17.2% of total· 1.1% port· 1.09M sh· $-114.4M QoQ· Q2 2026
Added
Hedge Fund
$98.2M· 11.7% of total· 0.0% port· 740K sh· +$96.2M QoQ· Q2 2026
Reduced
Institutional Manager
$93.7M· 11.2% of total· 0.0% port· 706K sh· $-4.3M QoQ· Q2 2026
Added
Hedge Fund
$78.3M· 9.3% of total· 0.1% port· 590K sh· +$846K QoQ· Q2 2026
Added
Hedge Fund
$62.8M· 7.5% of total· 0.0% port· 473K sh· +$44.0M QoQ· Q2 2026
Added
Hedge Fund
$53.1M· 6.3% of total· 0.0% port· 400K sh· +$39.4M QoQ· Q2 2026
Added
Hedge Fund
$29.6M· 3.5% of total· 0.0% port· 223K sh· +$19.3M QoQ· Q2 2026
Added
Family Office
$23.0M· 2.7% of total· 0.4% port· 173K sh· — QoQ· Q2 2026
Added
Hedge Fund
$20.9M· 2.5% of total· 0.0% port· 157K sh· — QoQ· Q2 2026
Added
Hedge Fund
$12.7M· 1.5% of total· 0.0% port· 96K sh· +$11.6M QoQ· Q2 2026
Added
Hedge Fund
$11.9M· 1.4% of total· 0.0% port· 90K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$11.9M· 1.4% of total· 0.5% port· 90K sh· $-22.9M QoQ· Q2 2026
Reduced
Hedge Fund
$8.5M· 1.0% of total· 0.1% port· 64K sh· $-10.0M QoQ· Q2 2026
Added
Hedge Fund
$7.5M· 0.9% of total· 0.0% port· 56K sh· +$7.4M QoQ· Q2 2026
Unchanged
Institutional Manager
$6.3M· 0.8% of total· 0.0% port· 48K sh· +$0 QoQ· Q2 2026
Added
Hedge Fund
$5.7M· 0.7% of total· 0.0% port· 43K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$5.1M· 0.6% of total· 0.0% port· 39K sh· $-19.1M QoQ· Q2 2026
Added
Hedge Fund
$5.1M· 0.6% of total· 0.0% port· 38K sh· — QoQ· Q2 2026
Added
Hedge Fund
$2.9M· 0.3% of total· 0.0% port· 22K sh· — QoQ· Q2 2026
Added
Hedge Fund
$1.9M· 0.2% of total· 0.0% port· 14K sh· — QoQ· Q2 2026
Added
Hedge Fund
$1.7M· 0.2% of total· 0.0% port· 13K sh· +$1.5M QoQ· Q2 2026
Reduced
Hedge Fund
$668K· 0.1% of total· 0.0% port· 5K sh· $-110K QoQ· Q2 2026
Added
Hedge Fund
$607K· 0.1% of total· 0.0% port· 5K sh· — QoQ· Q2 2026
Reduced
Hedge Fund
$572K· 0.1% of total· 0.0% port· 4K sh· $-1.2M QoQ· Q2 2026
Reduced
Hedge Fund
$514K· 0.1% of total· 0.0% port· 4K sh· $-6.4M QoQ· Q2 2026
Unchanged
Hedge Fund
$52· 0.0% of total· 0.0% port· 1 sh· +$0 QoQ· Q1 2025
1–10 of 27
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