Security record · archived quarter
RMBS
Rambus Inc. · Technology · Semiconductors
16Tracked holders
0Δ holders
44.72MShares held
$2.86BReported value
+1New positions
−1Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -7.1% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 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 · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 15.00M | — | $960.31M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | The Vanguard Group ✦ (passive) | 12.56M | — | $804.14M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | The Vanguard Group ✦ (passive) | 12.56M | — | $804.14M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | The Vanguard Group ✦ (passive) | 12.56M | — | $804.14M | 0.0% | n/c | 1 | SEC ↗ |
| 23 | The Vanguard Group ✦ (passive) | 12.56M | — | $804.14M | 0.0% | n/c | 1 | SEC ↗ |
| 24 | The Vanguard Group ✦ (passive) | 12.56M | — | $804.14M | 0.0% | n/c | 1 | SEC ↗ |
| 25 | T. Rowe Price ✦ | 4.69M | -46.3% | $300.47M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 26 | T. Rowe Price ✦ | 4.69M | -46.3% | $300.47M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 27 | State Street Global Advisors ✦ (passive) | 4.51M | -1.6% | $288.67M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 28 | Geode Capital Management ✦ (passive) | 2.69M | +1.4% | $172.09M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 29 | Geode Capital Management ✦ (passive) | 2.69M | +1.4% | $172.09M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 30 | Norges Bank ✦ (passive) | 1.97M | -1.9% | $126.27M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 31 | Wellington Management ✦ | 1.21M | +1.1% | $77.26M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 32 | Wellington Management ✦ | 1.21M | +1.1% | $77.26M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 33 | Wellington Management ✦ | 1.21M | +1.1% | $77.26M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 34 | Wellington Management ✦ | 1.21M | +1.1% | $77.26M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 35 | AQR Capital Management ✦ | 701.75K | +192.8% | $44.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 36 | AQR Capital Management ✦ | 701.75K | +192.8% | $44.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 37 | AQR Capital Management ✦ | 701.75K | +192.8% | $44.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 38 | AQR Capital Management ✦ | 701.75K | +192.8% | $44.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 39 | AQR Capital Management ✦ | 701.75K | +192.8% | $44.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 40 | AQR Capital Management ✦ | 701.75K | +192.8% | $44.93M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 41 | Millennium Management ✦ | 418.51K | +77.3% | $26.79M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 42 | Fidelity (FMR) ✦ | 338.26K | — | $21.66M | 0.0% | n/c | 1 | SEC ↗ |
| 43 | Fidelity (FMR) ✦ | 338.26K | — | $21.66M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | Fidelity (FMR) ✦ | 338.26K | — | $21.66M | 0.0% | n/c | 1 | SEC ↗ |
| 45 | Fidelity (FMR) ✦ | 338.26K | — | $21.66M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | Fidelity (FMR) ✦ | 338.26K | — | $21.66M | 0.0% | n/c | 1 | SEC ↗ |
| 47 | Bridgewater Associates ✦ | 226.87K | +190.6% | $14.52M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 48 | Citadel Advisors ✦ | 152.40K | +734.1% | $9.76M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 49 | Citadel Advisors ✦ | 152.40K | +734.1% | $9.76M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 50 | Two Sigma Investments ✦ | 131.65K | -58.0% | $8.43M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 51 | PRIMECAP Management ✦ | 62.30K | -14.5% | $3.99M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 52 | D. E. Shaw & Co. ✦ | 52.53K | -7.5% | $3.36M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 53 | D. E. Shaw & Co. ✦ | 52.53K | -7.5% | $3.36M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 54 | Gotham Asset Management ✦ | 4.93K | New | $315,811 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Gotham Asset Management | $315,811 | 0.0% |
Exited
| Renaissance Technologies | $1.19M | 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: Q2 2025 ·
Methodology ·
Get this via the API