MPWR — MONOLITHIC PWR SYS INC
Index member: Invesco QQQ Trust · S&P 500
As of Q2 2026, 48 SEC-registered investment managers reported holding MPWR (MONOLITHIC PWR SYS INC) in their latest 13F filings, with a combined reported value of $32.01B across 24.16M shares. That is +10.8% by share count (+2.36M shares) versus the previous quarter, while reported value moved +42.6%. Ownership is concentrated: the five largest holders account for 65.3% of reported value and the top ten for 79.5%.
Compared with the prior quarter, 6 opened new positions, 20 added to existing stakes, 19 trimmed, 1 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
MPWR is a constituent of the Invesco QQQ Trust, S&P 500 and is classified in the Technology sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
| Fund | Quarter | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|---|
| BlackRock Inc history | Q2 2026 | 5.59M | $7.73B | 0.12% | Reduce |
| Fidelity Management & Research (FMR) history | Q2 2026 | 5.18M | $7.16B | 0.34% | Add |
| Vanguard Group history | Q4 2025 | 6.03M | $5.47B | 0.08% | Reduce |
| Invesco Ltd history | Q2 2026 | 2.34M | $3.24B | 0.27% | Add |
| Geode Capital Management history | Q2 2026 | 1.20M | $1.65B | 0.09% | Reduce |
| Franklin Resources history | Q2 2026 | 811.97K | $1.12B | 0.26% | Reduce |
| Goldman Sachs Group history | Q2 2026 | 791.25K | $1.09B | 0.10% | Add |
| Norges Bank Investment Management history | Q2 2026 | 751.40K | $1.04B | 0.10% | Add |
| Morgan Stanley history | Q2 2026 | 727.88K | $1.01B | 0.06% | Add |
| Bank of America Corp history | Q2 2026 | 536.24K | $741.27M | 0.05% | Add |
| Northern Trust Corp history | Q2 2026 | 479.49K | $662.83M | 0.08% | Reduce |
| UBS Group AG history | Q2 2026 | 450.48K | $622.72M | 0.08% | Reduce |
| MFS Investment Management history | Q2 2026 | 442.18K | $611.19M | 0.20% | Reduce |
| JPMorgan Chase & Co history | Q2 2026 | 434.95K | $570.99M | 0.07% | New |
| Charles Schwab Investment Management history | Q2 2026 | 388.95K | $537.67M | 0.07% | Add |
| Legal & General Investment Management America history | Q2 2026 | 359.94K | $497.56M | 0.10% | Reduce |
| Citigroup Inc history | Q2 2026 | 325.28K | $449.66M | 0.16% | Reduce |
| BNY Mellon history | Q2 2026 | 291.11K | $402.41M | 0.07% | Hold |
| Fidelity International (FIL) history | Q2 2026 | 224.58K | $310.45M | 0.22% | Add |
| Citadel Advisors history | Q2 2026 | 220.99K | $305.48M | 0.04% | Add |
New Positions (Q2 2026)
- JPMorgan Chase & Co 434.95K sh · $570.99M
- Renaissance Technologies 63.07K sh · $87.18M
- Moore Capital Management 6.25K sh · $8.64M
- Arrowstreet Capital 3.13K sh · $4.33M
- Maverick Capital 593 sh · $819.74K
- Baillie Gifford & Co 5 sh · $6.91K
Fully Exited (vs previous quarter)
- Janus Henderson Group sold 7.37K sh · $8.06M
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q3 2021 | Q4 2021 | Q1 2022 | Q2 2022 | Q3 2022 | Q4 2022 | Q1 2023 | Q2 2023 | Q3 2023 | Q4 2023 | Q1 2024 | Q2 2024 | Q3 2024 | Q4 2024 | Q1 2025 | Q2 2025 | Q3 2025 | Q4 2025 | Q1 2026 | Q2 2026 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BlackRock Inc | — | — | — | — | — | — | — | — | — | — | — | — | 5.80M | 5.42M | 4.91M | 5.23M | 5.73M | 5.96M | 6.07M | 5.59M |
| Fidelity Management & Research (FMR) | 296.73K | 346.92K | 352.02K | 795.88K | 1.27M | 1.46M | 1.76M | 2.65M | 3.58M | 2.53M | 2.81M | 3.16M | 3.52M | 3.12M | 3.50M | 3.39M | 3.56M | 3.98M | 4.40M | 5.18M |
| Invesco Ltd | 1.67M | 1.63M | 1.42M | 1.34M | 1.50M | 1.49M | 1.64M | 1.46M | 977.04K | 1.26M | 1.20M | 1.16M | 1.08M | 1.16M | 1.25M | 1.17M | 1.14M | 1.43M | 1.49M | 2.34M |
| Geode Capital Management | 829.73K | 854.79K | 884.36K | 892.81K | 926.76K | 953.08K | 966.30K | 998.07K | 1.06M | 1.10M | 1.15M | 1.20M | 1.33M | 1.37M | 1.41M | 1.32M | 1.34M | 1.38M | 1.43M | 1.20M |
| Franklin Resources | 1.58M | 1.56M | 1.55M | 1.63M | 1.67M | 1.68M | 1.71M | 1.80M | 1.79M | 1.83M | 1.79M | 1.76M | 1.61M | 1.44M | 1.34M | 1.09M | 1.05M | 1.05M | 928.67K | 811.97K |
| Goldman Sachs Group | 245.28K | 233.99K | 233.08K | 229.31K | 304.56K | 229.08K | 245.28K | 323.14K | 248.22K | 364.15K | 411.62K | 510.02K | 430.26K | 270.62K | 298.51K | 521.55K | 438.32K | 597.66K | 568.06K | 791.25K |
| Norges Bank Investment Management | — | — | — | — | — | 424.86K | — | — | — | 574.65K | — | 651.90K | — | 834.56K | — | 598.89K | — | 726.71K | — | 751.40K |
| Morgan Stanley | 124.28K | 90.67K | 104.71K | 326.54K | 368.13K | 382.41K | 324.31K | 351.30K | 398.97K | 412.31K | 493.16K | 419.00K | 444.89K | 459.30K | 540.63K | 565.02K | 558.67K | 649.07K | 656.37K | 727.88K |
| Bank of America Corp | 617.78K | 620.83K | 651.98K | 680.42K | 612.04K | 658.91K | 721.84K | 613.79K | 581.29K | 608.30K | 806.02K | 800.08K | 764.20K | 554.79K | 587.03K | 692.75K | 725.92K | 549.58K | 382.16K | 536.24K |
| Northern Trust Corp | 456.80K | 442.39K | 444.15K | 452.90K | 452.21K | 445.02K | 448.89K | 431.52K | 459.78K | 446.11K | 432.21K | 432.20K | 414.88K | 509.29K | 498.52K | 482.06K | 485.83K | 483.70K | 489.12K | 479.49K |
| UBS Group AG | 110.58K | 67.95K | 101.41K | 68.61K | 7.05K | 71.15K | 106.89K | 87.85K | 96.93K | 194.29K | 168.53K | 117.18K | 212.42K | 410.57K | 393.29K | 502.54K | 528.32K | 438.99K | 541.91K | 450.48K |
| MFS Investment Management | 1.22M | 1.14M | — | 1.27M | 1.28M | 1.12M | 1.13M | 1.09M | 1.05M | 1.06M | 985.04K | 941.38K | 678.09K | 488.30K | 457.55K | 485.39K | 556.59K | 570.72K | 567.77K | 442.18K |
| JPMorgan Chase & Co | 520.08K | 466.40K | 429.29K | 438.46K | 367.83K | 394.26K | 650.74K | 1.27M | 1.21M | 1.22M | 985.14K | 2.40K | 920.95K | 497.49K | 629.57K | 856.73K | 863.23K | 512.27K | — | 434.95K |
| Charles Schwab Investment Management | 218.19K | 223.67K | 226.42K | 233.69K | 241.92K | 249.95K | 255.19K | 260.27K | 277.04K | 286.26K | 294.31K | 308.62K | 314.26K | 325.82K | 335.99K | 343.96K | 357.91K | 365.38K | 376.37K | 388.95K |
| Legal & General Investment Management America | 289.26K | 280.04K | 283.11K | 323.99K | 299.85K | 272.01K | 277.06K | 284.21K | 271.98K | 320.59K | 318.63K | 297.14K | 389.70K | 327.18K | 336.73K | 350.57K | 358.43K | 356.64K | 380.09K | 359.94K |
| Citigroup Inc | 153.23K | 148.58K | 165.09K | 133.81K | 104.98K | 84.01K | 96.54K | 183.02K | 144.61K | 117.36K | 248.32K | 329.83K | 317.49K | 347.18K | 272.98K | 278.93K | 178.18K | 245.48K | 340.83K | 325.28K |
| BNY Mellon | 336.83K | 333.55K | 329.00K | 339.82K | 339.91K | 379.06K | 375.67K | 339.45K | 340.75K | 339.40K | 332.12K | 327.37K | 313.60K | 349.92K | 355.31K | 336.55K | 304.09K | 295.12K | 289.83K | 291.11K |
| Fidelity International (FIL) | — | — | — | — | — | — | — | — | — | — | — | — | 321 | 598 | 110.59K | 523.07K | 497.33K | 316.09K | 154.64K | 224.58K |
| Citadel Advisors | 53.14K | 84.38K | 378.91K | 280.29K | 267.48K | 89.28K | 262.75K | 96.37K | 180.64K | 195.50K | 173.57K | 112.75K | 85.65K | 318.71K | 178.68K | 92.45K | 349.07K | 119.53K | 99.81K | 220.99K |
| Two Sigma Investments | 10.60K | 17.80K | — | — | 7.60K | — | — | — | 12.18K | — | — | — | — | — | — | — | — | 2.00K | 21.22K | 195.91K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
Drag / scroll to zoom · Default shows the most recent year · Annotations come from quarterly fund actions in 13F filings · Hover a marker for details