RMBS
Rambus Inc. · Technology · Semiconductors
Momentum inputs (comparable managers):
holder breadth +16.7% ·
share flow -18.4% ·
net new positions +14.3%
· formula
Ownership fragmentation: more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 3 | 0 | 186.25K | $16.07M | n/a | −1 |
| Q2 2026 | 139 | +6 | 78.25M | $10.35B | +12 | −7 |
| 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 | n/a | −3 |
| Q4 2024 | 16 | +1 | 18.03M | $953.00M | +1 | n/a |
| Q3 2024 | 14 | +2 | 9.95M | $420.01M | +2 | n/a |
| Q2 2024 | 12 | n/a | 12.20M | $716.28M | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Geode Capital Management ✦ (passive) | 2.62M | +0.8% | $110.69M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 2 | Wellington Management ✦ | 1.46M | -76.5% | $61.59M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 3 | Norges Bank ✦ (passive) | 1.29M | 0.0% | $54.32M | 0.0% | Held | 2 | SEC ↗ |
| 4 | T. Rowe Price ✦ | 1.00M | -5.7% | $42.39M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 5 | Millennium Management ✦ | 936.60K | +2413.8% | $39.54M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 6 | Two Sigma Investments ✦ | 823.89K | +246.1% | $34.78M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 7 | D. E. Shaw & Co. ✦ | 800.70K | +1402.1% | $33.81M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 8 | AQR Capital Management ✦ | 362.25K | -36.8% | $15.25M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 9 | Marshall Wace ✦ | 185.56K | +3281.8% | $7.83M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 10 | Citadel Advisors ✦ | 185.45K | New | $7.83M | 0.0% | New | 1 | SEC ↗ ×2 |
| 11 | PRIMECAP Management ✦ | 94.50K | -8.8% | $3.99M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 12 | Point72 Asset Management ✦ | 67.59K | New | $2.85M | 0.0% | New | 1 | SEC ↗ |
| 13 | Bridgewater Associates ✦ | 61.15K | +1150.7% | $2.58M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 14 | Gotham Asset Management ✦ | 60.56K | +111.1% | $2.56M | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Citadel Advisors | $7.83M | 0.0% |
| Point72 Asset Management | $2.85M | 0.0% |
Exited
| No tracked exits this quarter. |
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.
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)
Director · 5.00K sh · $525,000
Director · 5.00K sh · $504,600
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology