MPWR
Monolithic Power Systems, Inc. · Technology · Semiconductors
Momentum inputs (comparable managers):
holder breadth -16.7% ·
share flow +0.9% ·
net new positions -20.0%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 166 | +5 | 38.15M | $52.59B | +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 | Geode Capital Management ✦ (passive) | 1.33M | +11.2% | $1.23B | 0.1% | ▲ Add | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 1.33M | +11.2% | $1.23B | 0.1% | ▲ Add | 2 | SEC ↗ |
| 3 | T. Rowe Price ✦ | 1.31M | -20.8% | $1.21B | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 4 | T. Rowe Price ✦ | 1.31M | -20.8% | $1.21B | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 5 | Wellington Management ✦ | 1.10M | 0.0% | $1.02B | 0.2% | ▲ Add | 2 | SEC ↗ |
| 6 | Wellington Management ✦ | 1.10M | 0.0% | $1.02B | 0.2% | ▲ Add | 2 | SEC ↗ |
| 7 | Wellington Management ✦ | 1.10M | 0.0% | $1.02B | 0.2% | ▲ Add | 2 | SEC ↗ |
| 8 | Norges Bank ✦ (passive) | 741.09K | +13.7% | $685.14M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 9 | Millennium Management ✦ | 158.93K | +2359.8% | $146.93M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 80.72K | -4.3% | $74.63M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 11 | AQR Capital Management ✦ | 80.72K | -4.3% | $74.63M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 12 | AQR Capital Management ✦ | 80.72K | -4.3% | $74.63M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 13 | AQR Capital Management ✦ | 80.72K | -4.3% | $74.63M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 14 | Adage Capital Partners ✦ | 71.00K | +70.3% | $65.64M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 15 | D. E. Shaw & Co. ✦ | 30.29K | -25.6% | $28.01M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 16 | Gotham Asset Management ✦ | 18.50K | +16.8% | $17.11M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 17 | Citadel Advisors ✦ | 2.35K | -50.5% | $2.18M | 0.0% | ▼ Trim | 2 | 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
| Marshall Wace | $3.09M | was 0.0% |
| Renaissance Technologies | $563,672 | 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)
Director · 50 sh · $64,078
Officer · 6 sh · $8,482
Director · 50 sh · $71,000
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology