1,222 institutions reported holding $51.09B of MONOLITHIC PWR SYS INC (MPWR) in SEC 13F filings for 2026-03-31. Largest institutional holders: BlackRock, Inc. ($6.64B), FMR LLC ($4.81B), VANGUARD CAPITAL MANAGEMENT LLC ($3.37B), VANGUARD PORTFOLIO MANAGEMENT LLC ($2.75B), STATE STREET CORP ($2.40B). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $6.64B | 6.1M | Added |
| 2 | FMR LLC | $4.81B | 4.4M | Added |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $3.37B | 3.1M | New |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | $2.75B | 2.5M | New |
| 5 | STATE STREET CORP | $2.40B | 2.2M | Added |
| 6 | Invesco Ltd. | $1.62B | 1.5M | Added |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $1.56B | 1.4M | Added |
| 8 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.38B | 1.3M | Trimmed |
| 9 | FRANKLIN RESOURCES INC | $1.02B | 928,671 | Trimmed |
| 10 | T. Rowe Price Investment Management, Inc. | $789.0M | 721,622 | Trimmed |
| 11 | MORGAN STANLEY | $717.6M | 656,367 | Added |
| 12 | FIRST TRUST ADVISORS LP | $646.6M | 591,353 | Trimmed |
| 13 | GOLDMAN SACHS GROUP INC | $621.1M | 568,064 | Trimmed |
| 14 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | $620.7M | 567,769 | Trimmed |
| 15 | BARCLAYS PLC | $607.7M | 555,808 | Trimmed |
| 16 | UBS Group AG | $592.5M | 541,913 | Added |
| 17 | VAN ECK ASSOCIATES CORP | $573.5M | 524,571 | Added |
| 18 | JPMORGAN CHASE & CO | $556.2M | 554,919 | Added |
| 19 | NORTHERN TRUST CORP | $534.8M | 489,120 | Added |
| 20 | Royal Bank of Canada | $517.6M | 473,368 | Added |
| 21 | Voya Investment Management LLC | $429.9M | 393,559 | Added |
| 22 | BANK OF AMERICA CORP /DE/ | $417.8M | 382,162 | Trimmed |
| 23 | Legal & General Group Plc | $415.6M | 380,089 | Added |
| 24 | BROWN ADVISORY INC | $415.4M | 379,897 | Trimmed |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $411.5M | 376,374 | Added |
Source: SEC Form 13F filings · as of 2026-03-31