MPWR
Monolithic Power Systems, Inc. · Technology · Semiconductors
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2024
| 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 | T. Rowe Price ✦ | 1.66M | — | $1.36B | 0.2% | n/c | 1 | SEC ↗ ×2 |
| 2 | Geode Capital Management ✦ (passive) | 1.20M | — | $983.76M | 0.1% | n/c | 1 | SEC ↗ ×2 |
| 3 | Wellington Management ✦ | 1.10M | — | $907.11M | 0.2% | n/c | 1 | SEC ↗ ×4 |
| 4 | Norges Bank ✦ (passive) | 651.90K | — | $535.65M | 0.1% | n/c | 1 | SEC ↗ |
| 5 | AQR Capital Management ✦ | 84.36K | — | $69.32M | 0.1% | n/c | 1 | SEC ↗ ×4 |
| 6 | Adage Capital Partners ✦ | 41.70K | — | $34.26M | 0.1% | n/c | 1 | SEC ↗ |
| 7 | D. E. Shaw & Co. ✦ | 40.69K | — | $33.43M | 0.1% | n/c | 1 | SEC ↗ ×2 |
| 8 | Gotham Asset Management ✦ | 15.84K | — | $13.01M | 0.2% | n/c | 1 | SEC ↗ |
| 9 | Millennium Management ✦ | 6.46K | — | $5.31M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | Citadel Advisors ✦ | 4.75K | — | $3.91M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | Marshall Wace ✦ | 3.76K | — | $3.09M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | Renaissance Technologies ✦ | 686 | — | $563,672 | 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
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
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