MPWRMONOLITHIC POWER SYSTEMS INC
Insider trading & SEC Form 4 activity — last 90 days. Latest filing: 2026-06-03.
Insider buys (90d)
$0.00
Insider sells (90d)
$183.71M
Net flow
$-183.71M
Filings
18
Buy transactions
0
Sell transactions
56
Distinct insiders
8
Last close (cached)
$1481.05
as of 2026-06-05
1d return
-10.4%
5d return
-5.4%
1m return
-10.4%
Top insiders trading MPWR (90d)
Recent transactions (50)
| Filed | Txn date | Insider | Code | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-03 | 2026-06-01 | Sciammas Maurice | Sale | 30 | $1533.95 | $46.0K | open → |
| 2026-06-02 | 2026-05-29 | Sciammas Maurice | Gift | 12,472 | $0.00 | $0.00 | open → |
| 2026-05-29 | 2026-05-27 | Tseng Saria | Sale | 7,565 | $1700.00 | $12.86M | open → |
| 2026-05-28 | 2026-05-26 | DEAN ROBERT W II | Sale | 22 | $1649.56 | $36.3K | open → |
| 2026-05-27 | 2026-05-26 | Zhou Jeff | Sale | 486 | $1680.00 | $816.5K | open → |
| 2026-05-27 | 2026-05-22 | Tseng Saria | Sale | 5,000 | $1586.43 | $7.93M | open → |
| 2026-05-27 | 2026-05-22 | Tseng Saria | Gift | 200 | $0.00 | $0.00 | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 130 | $1521.43 | $197.8K | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 352 | $1518.15 | $534.4K | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 551 | $1513.11 | $833.7K | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 3,769 | $1507.70 | $5.68M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 2,929 | $1503.05 | $4.40M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 608 | $1499.46 | $911.7K | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 862 | $1491.48 | $1.29M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 6,688 | $1486.76 | $9.94M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 5,737 | $1482.51 | $8.51M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 4,082 | $1476.96 | $6.03M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 5,049 | $1472.84 | $7.44M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 5,819 | $1467.62 | $8.54M | open → |
| 2026-05-21 | 2026-05-18 | Hsing Michael | Sale | 3,424 | $1462.61 | $5.01M | open → |
| 2026-05-20 | 2026-05-18 | DEAN ROBERT W II | Sale | 4 | $1563.28 | $6.3K | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 50 | $1585.51 | $79.3K | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 447 | $1582.21 | $707.2K | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 703 | $1577.75 | $1.11M | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 1,312 | $1571.49 | $2.06M | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 2,020 | $1567.15 | $3.17M | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 2,010 | $1562.01 | $3.14M | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 1,717 | $1557.48 | $2.67M | open → |
| 2026-05-19 | 2026-05-15 | Sciammas Maurice | Sale | 3,741 | $1550.36 | $5.80M | open → |
| 2026-05-15 | 2026-05-13 | Sciammas Maurice | Gift | 1,563 | $0.00 | $0.00 | open → |
| 2026-05-15 | 2026-05-13 | Sciammas Maurice | Gift | 1,563 | $0.00 | $0.00 | open → |
| 2026-05-15 | 2026-05-13 | DEAN ROBERT W II | Other | 2,156 | $0.00 | $0.00 | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 120 | $1321.94 | $158.6K | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 840 | $1319.25 | $1.11M | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 4,244 | $1312.82 | $5.57M | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 1,279 | $1308.30 | $1.67M | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 800 | $1302.52 | $1.04M | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 400 | $1292.08 | $516.8K | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 120 | $1287.12 | $154.5K | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 240 | $1279.55 | $307.1K | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 360 | $1270.29 | $457.3K | open → |
| 2026-04-10 | 2026-04-08 | Tseng Saria | Sale | 560 | $1266.48 | $709.2K | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 514 | $1600.14 | $822.5K | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 2,619 | $1596.42 | $4.18M | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 1,355 | $1591.38 | $2.16M | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 2,587 | $1586.81 | $4.11M | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 1,879 | $1581.81 | $2.97M | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 834 | $1575.57 | $1.31M | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 1,078 | $1571.58 | $1.69M | open → |
| 2026-05-08 | 2026-05-06 | Elmiger Eugen J | Sale | 814 | $1566.36 | $1.28M | open → |
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