Monolithic Power CEO Michael Hsing Has Sold $750 Million in MPWR Stock Across 1,747 Transactions
MPS CEO Michael Hsing sold roughly $15.3 million in MPWR shares on November 12, 2025 at prices near $970 per share, part of a two-decade selling program totaling $750 million.
Michael Hsing, CEO and founder of Monolithic Power Systems (MPWR), sold approximately 15,800 shares on November 12, 2025 at prices between $966 and $980, netting roughly $15.3 million. The sale is part of a systematic selling program that has totaled $750 million across 1,747 transactions since 2004, making Hsing one of the most prolific CEO sellers in the semiconductor industry.
The Numbers
| Metric | Value |
|---|---|
| Career Sell Value | $750 million |
| Total Transactions | 1,747 |
| First Transaction | Nov 24, 2004 |
| Last Transaction | Dec 9, 2025 |
| Shares Remaining | 1,043,157 |
| Career Buy Value | $0 |
Recent Activity
| Date | Type | Shares | Price | Est. Value |
|---|---|---|---|---|
| Feb 3, 2026 | Award | 136,825 | — | — |
| Dec 9, 2025 | Gift | 12,337 | — | — |
| Nov 12, 2025 | Sell | 6,562 | $966.45 | $6.34M |
| Nov 12, 2025 | Sell | 3,024 | $967.41 | $2.93M |
| Nov 12, 2025 | Sell | 2,072 | $968.37 | $2.01M |
| Nov 12, 2025 | Sell | 4,141 | $969–980 | $4.03M |
Hsing's November 12, 2025 selling burst consisted of at least 10 separate transactions executed at staggered prices between $966 and $980, a signature 10b5-1 execution pattern. Just weeks later, he gifted 12,337 shares — a common pairing where a CEO sells a block for liquidity, then donates another block for tax-advantaged philanthropy. In February 2026, he received a 136,825-share stock award, replenishing a portion of his sold position.
What It Means
Hsing founded Monolithic Power Systems in 1997 and has built it into one of the highest-growth analog semiconductor companies in the market, with shares rising from under $10 to nearly $1,000 over two decades. His $750 million in career sales represents systematic monetization of that founder's equity through pre-arranged trading plans. The selling has been remarkably consistent — small blocks every few weeks — rather than concentrated bursts. With 1.04 million shares remaining (worth approximately $1 billion at current prices), Hsing's economic alignment with shareholders remains significant. The February 2026 award of 136,825 shares also signals the board's continued confidence in his leadership.
What to Watch
- MPWR's exposure to AI data center power management — a rapidly growing segment that has driven the stock's recent surge past $900
- Whether Hsing's selling cadence increases at current near-all-time-high prices, which would be notable for a founder who typically sells in measured amounts
- Upcoming MPS earnings reports and any changes to full-year guidance that could affect insider sentiment
Breaking News Editor at 13F Insight. First to report on major SEC filings, institutional moves, and regulatory developments.
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