Security record · archived quarter
RMBS
Rambus Inc. · Technology · Semiconductors
140Tracked holders
0Δ holders
82.50MShares held
$7.59BReported value
+2New positions
−1Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -2.7% · net new positions +0.7% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q4 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 141 | +6 | 78.39M | $10.36B | +12 | −5 |
| Q1 2026 | 137 | -4 | 75.08M | $6.44B | +5 | −10 |
| Q4 2025 | 140 | 0 | 82.50M | $7.59B | +2 | −1 |
| Q3 2025 | 21 | +3 | 52.09M | $5.43B | +3 | −1 |
| Q2 2025 | 16 | 0 | 44.72M | $2.86B | +1 | −1 |
| Q1 2025 | 13 | -3 | 20.22M | $1.05B | — | −3 |
| Q4 2024 | 16 | +1 | 18.03M | $953.00M | +1 | — |
| Q3 2024 | 14 | +2 | 9.95M | $420.01M | +2 | — |
| Q2 2024 | 12 | — | 12.20M | $716.28M | — | — |
Who holds it · Q4 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 16.28M | +3.0% | $1.50B | 0.0% | ▲ Add | 3 | SEC ↗ |
| 19 | The Vanguard Group ✦ (passive) | 12.29M | -3.2% | $1.13B | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 20 | The Vanguard Group ✦ (passive) | 12.29M | -3.2% | $1.13B | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 21 | The Vanguard Group ✦ (passive) | 12.29M | -3.2% | $1.13B | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 22 | The Vanguard Group ✦ (passive) | 12.29M | -3.2% | $1.13B | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 23 | The Vanguard Group ✦ (passive) | 12.29M | -3.2% | $1.13B | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 24 | T. Rowe Price ✦ | 5.39M | +2.7% | $494.88M | 0.1% | ▲ Add | 7 | SEC ↗ |
| 25 | T. Rowe Price ✦ | 5.39M | +2.7% | $494.88M | 0.1% | ▲ Add | 7 | SEC ↗ |
| 26 | State Street Global Advisors ✦ (passive) | 4.25M | -3.1% | $390.68M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 27 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 29 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 30 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 31 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 32 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 34 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 35 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 37 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 38 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 39 | Invesco Ltd. | 4.15M | — | $381.22M | 0.0% | n/c | 1 | SEC ↗ |
| 40 | Geode Capital Management ✦ (passive) | 2.84M | +3.4% | $261.26M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 41 | Geode Capital Management ✦ (passive) | 2.84M | +3.4% | $261.26M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 42 | JPMorgan Chase ✦ | 2.07M | -59.6% | $189.78M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 2.07M | -59.6% | $189.78M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 44 | JPMorgan Chase ✦ | 2.07M | -59.6% | $189.78M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 45 | JPMorgan Chase ✦ | 2.07M | -59.6% | $189.78M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 46 | JPMorgan Chase ✦ | 2.07M | -59.6% | $189.78M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 47 | JPMorgan Chase ✦ | 2.07M | -59.6% | $189.78M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 48 | Alliancebernstein L.P. | 1.90M | — | $174.62M | 0.1% | n/c | 1 | SEC ↗ |
| 49 | Dimensional Fund Advisors Lp | 1.89M | — | $174.01M | 0.0% | n/c | 1 | SEC ↗ |
| 50 | Dimensional Fund Advisors Lp | 1.89M | — | $174.01M | 0.0% | n/c | 1 | SEC ↗ |
| 51 | Dimensional Fund Advisors Lp | 1.89M | — | $174.01M | 0.0% | n/c | 1 | SEC ↗ |
| 52 | Dimensional Fund Advisors Lp | 1.89M | — | $174.01M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | Dimensional Fund Advisors Lp | 1.89M | — | $174.01M | 0.0% | n/c | 1 | SEC ↗ |
| 54 | Norges Bank ✦ (passive) | 1.70M | New | $156.36M | 0.0% | New | 1 | SEC ↗ |
| 55 | Fidelity (FMR) ✦ | 1.59M | +15.5% | $145.83M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 56 | Fidelity (FMR) ✦ | 1.59M | +15.5% | $145.83M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 57 | Fidelity (FMR) ✦ | 1.59M | +15.5% | $145.83M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 58 | Fidelity (FMR) ✦ | 1.59M | +15.5% | $145.83M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 59 | Swedbank AB | 1.36M | — | $125.25M | 0.1% | n/c | 1 | SEC ↗ |
| 60 | Charles Schwab Investment… | 1.33M | — | $122.00M | 0.0% | n/c | 1 | SEC ↗ |
| 61 | Northern Trust Corp | 1.32M | — | $120.89M | 0.0% | n/c | 1 | SEC ↗ |
| 62 | Northern Trust Corp | 1.32M | — | $120.89M | 0.0% | n/c | 1 | SEC ↗ |
| 63 | Northern Trust Corp | 1.32M | — | $120.89M | 0.0% | n/c | 1 | SEC ↗ |
| 64 | Northern Trust Corp | 1.32M | — | $120.89M | 0.0% | n/c | 1 | SEC ↗ |
| 65 | Northern Trust Corp | 1.32M | — | $120.89M | 0.0% | n/c | 1 | SEC ↗ |
| 66 | Northern Trust Corp | 1.32M | — | $120.89M | 0.0% | n/c | 1 | SEC ↗ |
| 67 | Northern Trust Corp | 1.32M | — | $120.89M | 0.0% | n/c | 1 | SEC ↗ |
| 68 | Neuberger Berman Group LLC | 1.31M | — | $120.15M | 0.1% | n/c | 1 | SEC ↗ |
| 69 | Neuberger Berman Group LLC | 1.31M | — | $120.15M | 0.1% | n/c | 1 | SEC ↗ |
| 70 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 71 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 72 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 73 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 74 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 75 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 76 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 77 | Bank Of America Corp /De/ | 1.25M | — | $114.83M | 0.0% | n/c | 1 | SEC ↗ |
| 78 | Goldman Sachs Group ✦ | 1.19M | +0.6% | $109.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 79 | Goldman Sachs Group ✦ | 1.19M | +0.6% | $109.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 80 | Goldman Sachs Group ✦ | 1.19M | +0.6% | $109.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Nuveen, LLC | 1.10M | — | $101.27M | 0.0% | n/c | 1 | SEC ↗ |
| 82 | Nuveen, LLC | 1.10M | — | $101.27M | 0.0% | n/c | 1 | SEC ↗ |
| 83 | Nuveen, LLC | 1.10M | — | $101.27M | 0.0% | n/c | 1 | SEC ↗ |
| 84 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 85 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 86 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 87 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 88 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 89 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 90 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 91 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 92 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 93 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 94 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 95 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 96 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 97 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 98 | Bank of New York Mellon Corp | 1.09M | — | $100.54M | 0.0% | n/c | 1 | SEC ↗ |
| 99 | Barclays Plc | 1.02M | — | $94.00M | 0.0% | n/c | 1 | SEC ↗ |
| 100 | Barclays Plc | 1.02M | — | $94.00M | 0.0% | n/c | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Norges Bank | $156.36M | 0.0% |
Exited
| Arrowstreet Capital | $18.06M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 549 holders, 100.74M shares, $7.93B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 07
KISSNER CHARLES
Director · 5.00K sh · $504,600
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Jul 29
SC 13G/A — BlackRock, Inc.
Jun 05
SC 13G — FMR LLC
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q4 2025 ·
Methodology ·
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