Loading
Learn
Tools hub
Financial Calculators
Private, in-browser — no account required.
NasdaqGS · Technology · Holders
Top institutional shareholders of MPWR ranked by position size, plus filing changes and recent insider transactions when available.
Top 120 institutional holders
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 12.4% | 6.07M | +110.08K increased | +1.85% | Mar 31, 2026 | |
| 2 | 12.3% | 6.03M | -39.64K decreased | -65.00% | Dec 31, 2025 | |
| 3 | 9.00% | 4.40M | +423.82K increased | +10.66% | Mar 31, 2026 | |
| 4 | 6.30% | 3.08M | +3.08M initiated | — | Mar 31, 2026 | |
| 5 | 5.14% | 2.52M | +2.52M initiated | — | Mar 31, 2026 | |
| 6 | 4.47% | 2.19M | +8.04K increased | +37.00% | Mar 31, 2026 | |
| 7 | 3.04% | 1.49M | +50.40K increased | +3.51% | Mar 31, 2026 | |
| 8 | 2.93% | 1.43M | +49.79K increased | +3.60% | Mar 31, 2026 | |
| 9 | 2.58% | 1.26M | -428.44K decreased | -25.33% | Mar 31, 2026 | |
| 10 | 1.90% | 928.67K | -120.74K decreased | -11.51% | Mar 31, 2026 | |
| 11 | 1.49% | 726.71K | +127.82K increased | +21.34% | Dec 31, 2025 | |
| 12 | 1.48% | 721.62K | -2.87K decreased | -40.00% | Mar 31, 2026 | |
| 13 | 1.34% | 656.37K | +7.30K increased | +1.12% | Mar 31, 2026 | |
| 14 | FIRST TRUST ADVISORS LP | 1.21% | 591.35K | -110.10K decreased | -15.70% | Mar 31, 2026 |
| 15 | 1.16% | 568.06K | -25.68K decreased | -4.33% | Mar 31, 2026 | |
| 16 | MASSACHUSETTS FINANCIAL SERVICES CO | 1.16% | 567.77K | -2.95K decreased | -52.00% | Mar 31, 2026 |
| 17 | BARCLAYS PLC | 1.14% | 555.81K | -48.99K decreased | -8.10% | Mar 31, 2026 |
| 18 | 1.13% | 554.92K | +42.65K increased | +8.32% | Mar 31, 2026 | |
| 19 | 1.12% | 549.58K | -173.24K decreased | -23.97% | Dec 31, 2025 | |
| 20 | 1.10% | 540.41K | +101.43K increased | +23.11% | Mar 31, 2026 |
Recent insider transactions
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | SCIAMMAS, MAURICE EVP, WW Sales & Marketing | <0.01% | D | 1.56K | — | — | May 13, 2026 |
| 2 | DEAN, ROBERT W II Interim CFO | <0.01% | D | 2.16K | — | — | May 13, 2026 |
| 3 | SCIAMMAS, MAURICE EVP, WW Sales & Marketing | <0.01% | Award | 1.56K | — | — | May 13, 2026 |
| 4 | ELMIGER, EUGEN J Director | <0.01% | D | 1.08K | $1,572 | $1,694,163 | May 6, 2026 |
| 5 | ELMIGER, EUGEN J Director | <0.01% | D | 814 | $1,566 | $1,275,017 | May 6, 2026 |
| 6 | ELMIGER, EUGEN J Director | <0.01% | D | 320 | $1,560 | $499,162 | May 6, 2026 |
| 7 | ELMIGER, EUGEN J Director | <0.01% | D | 2.62K | $1,596 | $4,181,024 | May 6, 2026 |
| 8 | XIAO, DEMING EVP, Global Operations | 0.03% | D | 14.17K | $1,653 | $23,415,218 | May 6, 2026 |
| 9 | XIAO, DEMING EVP, Global Operations | 0.02% | D | 11.60K | $1,658 | $19,227,014 | May 6, 2026 |
| 10 | XIAO, DEMING EVP, Global Operations | <0.01% | D | 907 | $1,661 | $1,506,872 | May 6, 2026 |
| 11 | ELMIGER, EUGEN J Director | <0.01% | D | 1.35K | $1,591 | $2,156,320 | May 6, 2026 |
| 12 | ELMIGER, EUGEN J Director | <0.01% | D | 2.59K | $1,587 | $4,105,077 | May 6, 2026 |
Frequently asked
TECHi's MPWR Holders page ranks the largest institutional shareholders of Monolithic Power Systems Inc using filing-based market-data feeds.
The Holders page shows institutional positions by share count and, when available, the latest filing change so readers can spot accumulation, reductions, initiated positions, and unchanged holdings.
Recent insider buys, sales, awards, gifts, and option exercises appear below the institutional holders table when Form 4 rows are available.
