| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC | 12% | $4,344,359,487 | 5,939,946 | The Vanguard Group | 30 Jun 2025 | |||
| BlackRock, Inc. | 10% | +4% | $4,440,605,266 | +$203,578,448 | 4,899,383 | +4.8% | BlackRock, Inc. | 31 Dec 2025 |
| FMR LLC | 8.3% | $3,604,601,251 | 3,977,008 | FMR LLC | 31 Dec 2025 |
As of 30 Sep 2025, 969 institutional investors reported holding 46,594,488 shares of MONOLITHIC POWER SYSTEMS INC - COMMON STOCK (MPWR). This represents 97% of the company’s total 47,915,757 outstanding shares.
The largest institutional shareholders of MONOLITHIC POWER SYSTEMS INC - COMMON STOCK (MPWR) together control 66% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| VANGUARD GROUP INC | 13% | 6,074,033 | +2.3% | 0.08% | $5,591,997,740 |
| BlackRock, Inc. | 12% | 5,726,774 | +9.5% | 0.09% | $5,272,297,648 |
| FMR LLC | 7.4% | 3,564,796 | +5.1% | 0.17% | $3,281,894,553 |
| STATE STREET CORP | 4.5% | 2,134,704 | +0.69% | 0.07% | $1,968,577,775 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 3.3% | 1,573,798 | -25% | 0.16% | $1,448,902,000 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.8% | 1,337,697 | +1.5% | 0.08% | $1,226,828,661 |
| Invesco Ltd. | 2.4% | 1,139,133 | -2.3% | 0.17% | $1,048,731,183 |
| FRANKLIN RESOURCES INC | 2.2% | 1,052,053 | -3.3% | 0.24% | $968,562,111 |
| JPMORGAN CHASE & CO | 1.8% | 863,228 | +0.76% | 0.05% | $794,723,446 |
| T. Rowe Price Investment Management, Inc. | 1.6% | 750,688 | -19% | 0.42% | $691,114,000 |
| VAN ECK ASSOCIATES CORP | 1.5% | 732,448 | -23% | 0.63% | $674,321,000 |
| BROWN ADVISORY INC | 1.5% | 730,119 | -16% | 0.88% | $672,205,429 |
| BANK OF AMERICA CORP /DE/ | 1.5% | 722,816 | +4.3% | 0.05% | $665,453,225 |
| MORGAN STANLEY | 1.2% | 558,671 | -1.1% | 0.03% | $514,336,893 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 1.2% | 556,587 | +15% | 0.16% | $512,416,256 |
| UBS Group AG | 1.1% | 528,319 | +5.1% | 0.1% | $486,391,604 |
| FIL Ltd | 1% | 497,333 | -4.9% | 0.36% | $457,864,653 |
| NORTHERN TRUST CORP | 1% | 485,831 | +0.78% | 0.06% | $447,275,451 |
| WELLINGTON MANAGEMENT GROUP LLP | 0.95% | 452,938 | -36% | 0.07% | $416,992,839 |
| FIRST TRUST ADVISORS LP | 0.93% | 447,801 | +66% | 0.31% | $412,263,380 |
| GOLDMAN SACHS GROUP INC | 0.91% | 434,325 | -15% | 0.06% | $399,856,964 |
| Rafferty Asset Management, LLC | 0.79% | 379,318 | -28% | 1.1% | $349,215,324 |
| BARCLAYS PLC | 0.76% | 362,062 | -17% | 0.12% | $333,328,760 |
| Voya Investment Management LLC | 0.75% | 359,312 | +57% | 0.33% | $330,796,999 |
| Legal & General Group Plc | 0.75% | 358,429 | +2.2% | 0.07% | $329,984,073 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 14,276,472 | $12,923,299,043 | +$972,667,311 | $906.36 | 555 |
| 2025 Q3 | 46,594,488 | $42,877,564,181 | -$561,338,363 | $920.64 | 969 |
| 2025 Q2 | 47,319,591 | $34,604,458,962 | +$1,173,714,219 | $731.38 | 896 |
| 2025 Q1 | 46,061,486 | $26,700,920,271 | -$286,601,097 | $579.98 | 848 |
| 2024 Q4 | 46,496,915 | $27,530,887,700 | -$375,710,095 | $591.70 | 848 |
| 2024 Q3 | 46,241,327 | $42,731,203,371 | -$427,288,195 | $924.50 | 866 |
| 2024 Q2 | 46,878,387 | $38,519,520,474 | +$907,307,790 | $821.68 | 829 |
| 2024 Q1 | 45,912,491 | $31,091,246,206 | +$223,402,574 | $677.42 | 796 |
| 2023 Q4 | 45,402,028 | $28,629,807,533 | -$418,776,941 | $630.78 | 725 |
| 2023 Q3 | 45,982,739 | $21,242,239,379 | -$481,094,575 | $462.00 | 649 |
| 2023 Q2 | 46,640,420 | $25,183,815,752 | +$71,548,693 | $540.23 | 644 |
| 2023 Q1 | 46,369,939 | $23,198,306,260 | -$181,669,790 | $500.54 | 658 |
| 2022 Q4 | 47,017,508 | $16,624,837,267 | +$359,311,854 | $353.61 | 597 |
| 2022 Q3 | 45,983,338 | $16,720,600,237 | +$788,203,527 | $363.40 | 618 |
| 2022 Q2 | 43,709,252 | $16,792,098,001 | -$82,246,755 | $384.04 | 609 |
| 2022 Q1 | 43,853,705 | $21,267,523,237 | +$130,242,076 | $485.68 | 598 |
| 2021 Q4 | 43,564,292 | $21,489,393,439 | -$228,912,278 | $493.33 | 609 |
| 2021 Q3 | 43,483,682 | $21,075,138,239 | +$250,126,712 | $484.68 | 565 |
| 2021 Q2 | 42,846,046 | $15,982,432,031 | +$416,974,703 | $373.45 | 518 |
| 2021 Q1 | 42,738,703 | $15,095,910,243 | +$67,555,402 | $353.21 | 523 |
| 2020 Q4 | 42,520,318 | $15,566,068,580 | -$7,548,319 | $366.23 | 505 |
| 2020 Q3 | 42,417,552 | $11,858,147,686 | -$118,457,404 | $279.61 | 431 |
| 2020 Q2 | 42,823,926 | $10,170,291,358 | +$97,254,699 | $237.00 | 397 |
| 2020 Q1 | 42,490,931 | $7,116,341,479 | +$34,814,384 | $167.46 | 348 |
| 2019 Q4 | 41,838,285 | $7,450,515,487 | -$73,246,939 | $178.02 | 349 |
| 2019 Q3 | 42,351,592 | $6,591,532,706 | +$52,861,063 | $155.63 | 343 |
| 2019 Q2 | 42,040,561 | $5,705,771,067 | +$206,501,579 | $135.78 | 339 |
| 2019 Q1 | 41,736,982 | $5,655,841,352 | -$86,747,874 | $135.49 | 341 |
| 2018 Q4 | 42,451,324 | $4,934,913,814 | +$217,806,322 | $116.25 | 334 |
| 2018 Q3 | 40,463,736 | $5,079,641,448 | +$61,916,551 | $125.53 | 350 |
| 2018 Q2 | 39,899,582 | $5,333,990,585 | +$129,032,744 | $133.67 | 341 |
| 2018 Q1 | 38,996,384 | $4,514,731,100 | +$114,994,661 | $115.77 | 325 |
| 2017 Q4 | 38,439,899 | $4,319,265,532 | -$103,793,423 | $112.36 | 318 |
| 2017 Q3 | 39,361,866 | $4,194,367,387 | +$50,635,188 | $106.55 | 291 |
| 2017 Q2 | 38,916,034 | $3,752,216,354 | +$64,874,945 | $96.40 | 283 |
| 2017 Q1 | 38,307,935 | $3,528,140,646 | +$259,835,652 | $92.10 | 286 |
| 2016 Q4 | 39,266,525 | $3,218,544,717 | -$27,440,306 | $81.93 | 263 |
| 2016 Q3 | 39,555,200 | $3,183,026,431 | +$168,636,593 | $80.50 | 240 |
| 2016 Q2 | 39,471,515 | $2,696,704,897 | +$36,924,568 | $68.32 | 209 |
| 2016 Q1 | 39,192,404 | $2,490,943,966 | +$99,987,403 | $63.64 | 197 |
| 2015 Q4 | 37,627,753 | $2,397,322,686 | -$49,743,881 | $63.71 | 191 |
| 2015 Q3 | 38,408,694 | $1,966,058,416 | +$72,980,434 | $51.20 | 178 |
| 2015 Q2 | 37,204,401 | $1,886,652,193 | +$30,569,520 | $50.71 | 178 |
| 2015 Q1 | 36,538,309 | $1,923,031,117 | -$13,631,853 | $52.65 | 177 |
| 2014 Q4 | 36,864,580 | $1,833,337,638 | -$12,959,562 | $49.74 | 169 |
| 2014 Q3 | 37,165,175 | $1,637,185,627 | -$771,817 | $44.05 | 173 |
| 2014 Q2 | 37,224,227 | $1,576,398,316 | -$20,145,088 | $42.35 | 158 |
| 2014 Q1 | 37,700,139 | $1,461,102,651 | +$22,829,601 | $38.77 | 148 |