Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in MPWR held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 6.1M | $6.64B | +1.8% | 12.363% | 0.12% |
| 2 | FMR LLC | 4.4M | $4.81B | +10.7% | 8.960% | 0.26% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 3.1M | $3.37B | — | 6.278% | 0.08% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.5M | $2.75B | — | 5.123% | 0.15% |
| 5 | STATE STREET CORP | 2.2M | $2.40B | +0.4% | 4.455% | 0.08% |
| 6 | Invesco Ltd. | 1.5M | $1.62B | +3.5% | 3.024% | 0.25% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 1.4M | $1.56B | +3.6% | 2.916% | 0.10% |
| 8 | FRANKLIN RESOURCES INC | 929K | $1.02B | -11.5% | 1.891% | 0.25% |
| 9 | MORGAN STANLEY | 656K | $717.6M | +1.1% | 1.336% | 0.04% |
| 10 | FIRST TRUST ADVISORS LP | 591K | $646.6M | -15.7% | 1.204% | 0.46% |
| 11 | GOLDMAN SACHS GROUP INC | 568K | $621.1M | -5.0% | 1.157% | 0.07% |
| 12 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 568K | $620.7M | -0.5% | 1.156% | 0.21% |
| 13 | BARCLAYS PLC | 556K | $607.7M | -8.1% | 1.132% | 0.25% |
| 14 | UBS Group AG | 542K | $592.5M | +23.4% | 1.103% | 0.09% |
| 15 | NORTHERN TRUST CORP | 489K | $534.8M | +1.1% | 0.996% | 0.07% |
| 16 | ROYAL BANK OF CANADA | 473K | $517.6M | +168.1% | 0.964% | 0.09% |
| 17 | VOYA INVESTMENT MANAGEMENT LLC | 394K | $429.9M | +15.8% | 0.801% | 0.45% |
| 18 | BANK OF AMERICA CORP /DE/ | 382K | $417.8M | -30.5% | 0.778% | 0.03% |
| 19 | Legal & General Group Plc | 380K | $415.6M | +6.6% | 0.774% | 0.10% |
| 20 | BROWN ADVISORY INC | 380K | $415.4M | -24.1% | 0.773% | 0.68% |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 376K | $411.5M | +3.0% | 0.766% | 0.06% |
| 22 | CITIGROUP INC | 341K | $372.6M | +38.8% | 0.694% | 0.16% |
| 23 | Rafferty Asset Management, LLC | 317K | $347.1M | -19.9% | 0.646% | 1.41% |
| 24 | UBS ASSET MANAGEMENT AMERICAS INC | 302K | $330.4M | -5.2% | 0.615% | 0.07% |
| 25 | Bank of New York Mellon Corp | 290K | $316.9M | -1.8% | 0.590% | 0.06% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in MPWR — a direct measure of their conviction.
Filings activity in MPWR during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,093 | +5.5% | 59.60% | +8.28 pp | $46.18B | +16% |
| Q4 2025 | 1,036 | +8.6% | 51.32% | 0.22 pp | $39.76B | 0.4% |
| Q3 2025 | 954 | +7.3% | 51.54% | +10.65 pp | $39.93B | +26% |
| Q2 2025 | 889 | +7.2% | 40.89% | +9.93 pp | $31.68B | +32% |
| Q1 2025 | 829 | 0.4% | 30.96% | 1.93 pp | $23.98B | 5.9% |
| Q4 2024 | 832 | 2.2% | 32.89% | 17.78 pp | $25.48B | 35% |
| Q3 2024 | 851 | +4.9% | 50.67% | +4.57 pp | $39.25B | +9.9% |
| Q2 2024 | 811 | — | 46.10% | — | $35.72B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying MPWR stock.
Based on Q1 2026 13F filings, institutional ownership of Monolithic Power Systems, Inc. stands at 59.6%, held across 1,093 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of MPWR, with approximately 6,072,467 shares worth $6.64B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of MPWR.
Our composite Smart Money Score for MPWR is 54 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
189 institutions opened new positions in MPWR during Q1 2026, while 132 fully exited. 723 added to existing positions and 176 trimmed.
MPWR institutional ownership rose by 8.28 percentage points quarter-over-quarter, with a net change of +57 holders.
The top 10 institutions account for 55.3% of all reported 13F value in MPWR, and the top 25 account for 70.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Monolithic Power Systems, Inc. (MPWR) Institutional Ownership