Eugen J. Elmiger - SEC Form 4 Insider Trading Activity
Summary
Updated Aug 3, 2026
Eugen J. Elmiger has filed 1 SEC Form 4 filing across 1 company in the last 90 days - selling. Lifetime open-market sales: $22.41M.
Profile
Eugen J. Elmiger is a corporate insider at MONOLITHIC POWER SYSTEMS, INC. (MPWR). Elmiger has reported 3 insider filings with the SEC since 2025. The most recent filing was in May 2026.
| Role | Insider |
|---|---|
| Notability | 20/100 |
Board memberships
- MONOLITHIC POWER SYSTEMS, INC.
Trading Pattern
InsiderAlpha's records for Eugen J. Elmiger go back to 2025: 3 primary Form 4 filings, an average of 1.5 per year. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Career & Filing History
Every role Eugen J. Elmiger has reported on a Form 4, reconstructed from the filings themselves - reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
- Insider at MONOLITHIC POWER SYSTEMS, INC. (MPWR) - 3 filings, 2025 to 2026
Recent Transactions
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 514 | $1,600.14 | $822K |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 2.6K | $1,596.42 | $4.18M |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 1.4K | $1,591.38 | $2.16M |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 2.6K | $1,586.81 | $4.11M |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 1.9K | $1,581.81 | $2.97M |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 834 | $1,575.57 | $1.31M |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 1.1K | $1,571.58 | $1.69M |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 814 | $1,566.36 | $1.28M |
| 2026-05-08 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 320 | $1,559.88 | $499K |
| 2026-02-06 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | A - Grant or award | 189 | $0.00 | |
| 2025-08-29 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 800 | $849.41 | $680K |
| 2025-08-29 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 100 | $848.03 | $85K |
| 2025-08-29 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 900 | $847.30 | $763K |
| 2025-08-29 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 700 | $846.66 | $593K |
| 2025-08-29 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 700 | $845.54 | $592K |
| 2025-08-29 | MPWR | MONOLITHIC POWER SYSTEMS, INC. | S - Open-market sale | 800 | $844.25 | $675K |
Companies - Last 90 Days
- MONOLITHIC POWER SYSTEMS, INC. (MPWR) - 1 filing, last 2026-05-08
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades at the companies Eugen J. Elmiger has recently filed at. Multiple unrelated insiders buying the same stock within a short window - cluster buying - has historically been one of the strongest Form 4 signals.
- Michael Hsing - $295.49M of MPWR open-market activity in the last 12 months
- Saria Tseng - $145.64M of MPWR open-market activity in the last 12 months
- Deming Xiao - $76.43M of MPWR open-market activity in the last 12 months
- Maurice Sciammas - $76.09M of MPWR open-market activity in the last 12 months
- Theodore Blegen - $39.81M of MPWR open-market activity in the last 12 months
- Jeff Zhou - $3.92M of MPWR open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
- Fairmount Funds Management LLC
- Scott Farquhar
- Tilman J. Fertitta
- James E. Flynn
- Framework Ventures IV L.P.
- Angeliki Frangou
- Spencer Frazier
- Paul J. Fribourg
Frequently Asked Questions
Who is Eugen J. Elmiger?
Eugen J. Elmiger is a corporate insider at MONOLITHIC POWER SYSTEMS, INC. (MPWR). Elmiger has reported 3 insider filings with the SEC since 2025. The most recent filing was in May 2026.…
How many SEC Form 4 filings has Eugen J. Elmiger submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Eugen J. Elmiger been buying or selling stock?
Recorded transactions: 0 open-market purchases and 15 open-market sales ($22.41M) across all tracked filings.
Where can I see all of Eugen J. Elmiger's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
Learn More
Open the live Eugen J. Elmiger profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.