MPWR
Monolithic Power Systems, Inc. · Technology · Semiconductors
Momentum inputs (comparable managers):
holder breadth -16.7% ·
share flow -2.3% ·
net new positions -20.0%
— formula
Broad distribution — falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 166 | +5 | 38.17M | $52.65B | +8 | −2 |
| Q1 2026 | 163 | +3 | 37.39M | $40.78B | +6 | −4 |
| Q4 2025 | 159 | 0 | 43.73M | $37.89B | +3 | −2 |
| Q3 2025 | 18 | +1 | 24.30M | $22.37B | +2 | −2 |
| Q2 2025 | 15 | -3 | 21.56M | $15.77B | — | −3 |
| Q1 2025 | 15 | +2 | 7.50M | $4.35B | +2 | — |
| Q4 2024 | 13 | +2 | 7.31M | $4.33B | +2 | — |
| Q3 2024 | 10 | -2 | 4.86M | $4.49B | — | −2 |
| Q2 2024 | 12 | — | 4.81M | $3.95B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 5.94M | — | $4.34B | 0.1% | n/c | 1 | SEC ↗ ×5 |
| 2 | BlackRock ✦ (passive) | 5.23M | — | $3.82B | 0.1% | n/c | 1 | SEC ↗ ×21 |
| 3 | Fidelity (FMR) ✦ | 3.39M | — | $2.48B | 0.1% | n/c | 1 | SEC ↗ ×5 |
| 4 | State Street Global Advisors ✦ (passive) | 2.12M | +0.2% | $1.55B | 0.1% | ▲ Add | 3 | SEC ↗ |
| 5 | T. Rowe Price ✦ | 2.09M | +2.7% | $1.53B | 0.2% | ▲ Add | 5 | SEC ↗ ×2 |
| 6 | Geode Capital Management ✦ (passive) | 1.32M | -6.2% | $962.04M | 0.1% | ▼ Trim | 5 | SEC ↗ ×2 |
| 7 | Wellington Management ✦ | 703.15K | -7.7% | $514.27M | 0.1% | ▼ Trim | 5 | SEC ↗ ×4 |
| 8 | Norges Bank ✦ (passive) | 598.89K | +0.8% | $438.01M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 9 | Adage Capital Partners ✦ | 75.95K | -34.6% | $55.55M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 41.44K | -43.4% | $30.31M | 0.0% | ▼ Trim | 5 | SEC ↗ ×5 |
| 11 | Gotham Asset Management ✦ | 20.14K | +23.1% | $14.73M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 12 | Millennium Management ✦ | 15.53K | -89.5% | $11.36M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 13 | Citadel Advisors ✦ | 7.65K | +887.1% | $5.60M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 14 | D. E. Shaw & Co. ✦ | 5.43K | -25.4% | $3.97M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 15 | Arrowstreet Capital ✦ | 5.18K | -60.3% | $3.79M | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| Coatue Management | $112.19M | was 0.5% |
| Marshall Wace | $10.53M | was 0.0% |
| Bridgewater Associates | $1.90M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 1,109 holders, 45.61M shares, $45.88B 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)
Officer, Director · 130 sh · $176,402
Officer, Director · 596 sh · $788,693
Officer, Director · 2.12K sh · $2.82M
Officer, Director · 1.11K sh · $1.48M
Officer, Director · 2.95K sh · $3.95M
Officer, Director · 5.78K sh · $7.77M
Officer, Director · 6.34K sh · $8.54M
Officer, Director · 10.97K sh · $14.82M
Officer · 32 sh · $41,527
Director · 50 sh · $64,078
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology