MPWR MONOLITHIC PWR SYS INC
FollowStock (common), issuer CIK 1280452
1,208 managers (1,249 13F filers) reported a position in MPWR shares at 2026-06-30, 47,602,602 shares in all. 207 filers opened a position and 80 filers sold out during the quarter.
- Managers
- 1,208
- 13F filers
- 1,249
- New
- 207
- Added
- 419
- Reduced
- 464
- Sold out
- 80
- Shares held by filers
- 47,602,602
Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.
13D and 13G filers
No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.
Insider trades
No Form 4 transaction on this security in the data.
13F holders, Q2 2026
Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.
| Holder | Shares | Value | % of portfolio | Change | Source |
|---|---|---|---|---|---|
| OGOREK ANTHONY JOSEPH /NY/ /ADV | 1 | $1K | <0.01% | 0 | 13F-HRTimeline |
| Evolution Advisers, Inc. | 1 | $1K | <0.01% | new | 13F-HRTimeline |
| PEAK6 LLCin group PEAK6 LLC | 1 | $888 | <0.01% | 0 | 13F-HRTimelineGroup |
| Beaird Harris Wealth Management, LLC | 1 | $858 | <0.01% | 0 | 13F-HRTimeline |
| HALBERT HARGROVE GLOBAL ADVISORS, LLC | 1 | $802 | <0.01% | new | 13F-HRTimeline |
| Quest 10 Wealth Builders, Inc. | 0 | $650 | <0.01% | 0 | 13F-HRTimelineAmount filed as zero, left out of ratios. |
| Darwin Wealth Management, LLC | 0 | $552 | <0.01% | new | 13F-HRTimelineAmount filed as zero, left out of ratios. |
| Cordant, Inc. | 0 | $429 | <0.01% | new | 13F-HRTimelineAmount filed as zero, left out of ratios. |