Companies / Monolithic Power Systems Inc
Monolithic Power Systems Inc
Financials · FY2025
Ownership
49.1M shares outstanding · as of Jul 29, 2026
Ownership
| Insiders | 2.99% | 1,470,477 |
| 10%+ / strategic | 30.46% | 14,967,185 |
| Institutions | 76.70% | 37,694,208 |
| Public float | 0.00% | 0 |
Reported holdings exceed shares outstanding — public float shown as 0; some positions may overlap or lag.
% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.
Insiders 12
View all →| Insider | % of shares | Shares |
|---|---|---|
Hsing MichaelCEOCEO · Director | 1.73% | 848,263 |
Sciammas MauriceEVP, WW Sales & Marketing | 0.47% | 232,390 |
Xiao DemingEVP, Global Operations | 0.42% | 205,959 |
Tseng SariaEVP & General Counsel | 0.29% | 144,218 |
Blegen TheodoreFormerEVP and CFO | 0.17% | 82,353 |
Lee Victor KDirector | 0.06% | 27,756 |
Dean Robert W IIFormerInterim CFO | 0.01% | 5,878 |
Elmiger Eugen JDirector | 0.01% | 5,402 |
Zhou JeffDirector | <0.01% | 3,800 |
Martinez CarintiaDirector | <0.01% | 1,067 |
Institutional holders 1,075
View all →| Holder | Value | % of shares |
|---|---|---|
| $7.73B | 11.37% | |
| $5.47B | 12.28% | |
| $3.60B | 8.09% | |
| $3.16B | 4.64% | |
| $1.56B | 2.91% | |
| $1.30B | 2.92% | |
| $951.14M | 2.14% | |
| $658.66M | 1.48% | |
| $646.56M | 1.20% | |
| $588.29M | 1.32% |
Activity
Jun 30, 2026View all →
InsidersInstitutions
Who's accumulating and trimming this stock (13F).| Date | Actor | Action | Security | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|---|
| Q1 2026 as of | Norges Bank 13F manager | Exit | — | $-658.66M | -727K -100.00% | — | high |
| Q2 2026 as of | BlackRock, Inc. 13F manager | Trim | — | $-514.88M | -372K -6.25% | 5,589,925 11.37% of shares | high |
| Q1 2026 as of | Royal Bank of Canada 13F manager | Add | — | $324.49M | +297K +168.08% | 473,368 0.96% of shares | high |
| Q4 2025 as of | Barclays PLC 13F manager | Add | — | $220.01M | +243K +67.04% | 604,802 1.23% of shares | high |
| Q4 2025 as of | Bank of America Corp /De 13F manager | Trim | — | $-157.02M | -173K -23.97% | 549,575 1.12% of shares | high |
| Q2 2026 as of | State Street Corporation 13F manager | Add | — | $140.88M | +102K +4.67% | 2,282,186 4.64% of shares | high |
| Q1 2026 as of | Brown Advisory Inc 13F manager | Trim | — | $-132.15M | -121K -24.14% | 379,897 0.77% of shares | high |
| Q1 2026 as of | Vaughan Nelson Investment Management, L.P. 13F manager | Trim | — | $-129.33M | -118K -45.91% | 139,352 0.28% of shares | high |
5%+ ownership events
Schedule 13D / 13G
| Filer | Stance | % of class |
|---|---|---|
| Vanguard Group Inc | Passive13G/A | — |
| BlackRock, Inc. | Passive13G/A | — |
| Fmr LLC | Passive13G/A | — |
| Vanguard Portfolio Management | Passive13G | — |
| Vanguard Capital Management | Passive13G | — |
Securities
via CUSIP / OpenFIGI
| Symbol | Type | CUSIP |
|---|---|---|
| MPWR | — | 609839105 |