Monolithic Power (MPWR) EVP sells 15,000 shares in 10b5-1 plan
Rhea-AI Filing Summary
Maurice Sciammas, EVP, WW Sales & Marketing of Monolithic Power Systems, reported selling 15,000 shares of common stock on July 15, 2026 in 18 transactions under a Rule 10b5-1 trading plan adopted on November 24, 2025. Footnotes state each line’s price is a weighted average of multiple trades, with underlying trade prices ranging from $1,311.45 to $1,406.04 per share. He also reports various indirect holdings through family trusts and related accounts.
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Insights
Analyzing...
Insider Trade Summary 10b5-1
Net Seller: 15,000 shares ($20,245,937)
Net Sell
29 txns
Insider
Sciammas Maurice
Role
EVP, WW Sales & Marketing
Sold
15,000 shs ($20.25M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock | 527 | $1,314.03 | $692K |
| Sale | Common Stock | 274 | $1,318.42 | $361K |
| Sale | Common Stock | 409 | $1,323.93 | $541K |
| Sale | Common Stock | 464 | $1,329.30 | $617K |
| Sale | Common Stock | 776 | $1,334.59 | $1.04M |
| Sale | Common Stock | 1,460 | $1,339.59 | $1.96M |
| Sale | Common Stock | 1,864 | $1,344.16 | $2.51M |
| Sale | Common Stock | 1,506 | $1,348.91 | $2.03M |
| Sale | Common Stock | 5,640 | $1,352.95 | $7.63M |
| Sale | Common Stock | 50 | $1,359.36 | $68K |
| Sale | Common Stock | 240 | $1,369.18 | $329K |
| Sale | Common Stock | 472 | $1,375.47 | $649K |
| Sale | Common Stock | 418 | $1,378.73 | $576K |
| Sale | Common Stock | 410 | $1,384.11 | $567K |
| Sale | Common Stock | 50 | $1,388.19 | $69K |
| Sale | Common Stock | 213 | $1,396.16 | $297K |
| Sale | Common Stock | 117 | $1,400.45 | $164K |
| Sale | Common Stock | 110 | $1,405.71 | $155K |
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Holdings After Transaction:
Common Stock — 166,117 shares (Direct);
Common Stock — 1,699 shares (Indirect, The Joseph Roger Sciammas 2020 Irrevocable Trust)
Footnotes (1)
- This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,311.45 to $1,316.40 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,316.56 to $1,321.56. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,321.72 to $1,326.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,326.94 to $1,331.90. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,331.95 to $1,336.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,336.97 to $1,341.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,341.99 to $1,346.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,347.09 to $1,352.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,352.13 to $1,357.03. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,357.88 to $1,362.57. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,366.15 to $1,371.04. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,371.23 to $1,376.20. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,376.51 to $1,381.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,381.79 to $1,386.22. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,388.18 to $1,388.22. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,393.94 to $1,398.92. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,398.97 to $1,400.85. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,404.25 to $1,406.04. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.
Key Figures
Shares sold: 15,000 shares
Number of sale transactions: 18
Lowest weighted-average transaction price: $1,314.03 per share
+5 more
8 metrics
Shares sold
15,000 shares
Total common shares sold by Maurice Sciammas on July 15, 2026
Number of sale transactions
18
Distinct sale transactions of common stock reported for July 15, 2026
Lowest weighted-average transaction price
$1,314.03 per share
Lowest reported weighted-average sale price among the 18 transactions
Highest weighted-average transaction price
$1,405.71 per share
Highest reported weighted-average sale price among the 18 transactions
Underlying trade price range low
$1,311.45 per share
Lowest individual trade price noted in the footnote ranges
Underlying trade price range high
$1,406.04 per share
Highest individual trade price noted in the footnote ranges
Rule 10b5-1 plan adoption date
11/24/2025
Adoption date of the trading plan governing the reported sales
Indirect holding entries
11
Number of indirect ownership lines, including family trusts and related accounts
Key Terms
Rule 10b5-1 trading plan, weighted average sale price, irrevocable trust, GRATs
4 terms
Rule 10b5-1 trading plan regulatory
"This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average sale price financial
"The price is the weighted average sale price for the transactions reported on this line."
irrevocable trust financial
"The Chloe Liliane Sciammas 2020 Irrevocable Trust"
An irrevocable trust is a legal arrangement where an owner transfers assets into a separate entity managed by a trustee and gives up the power to modify or reclaim those assets. For investors it matters because putting stock or other holdings into such a trust can change who controls and benefits from the assets, affect taxes and creditor protection, and influence how easy it is to sell or value those holdings—like placing valuables in a locked safe overseen by someone else.
GRATs financial
"Various Sciammas GRATs"
AI-generated analysis. How Rhea-AI works. Not financial advice.
FAQ
What insider sale did MPWR executive Maurice Sciammas report?
He reported selling 15,000 shares of Monolithic Power Systems common stock on July 15, 2026. The sales occurred in 18 separate transactions under a Rule 10b5-1 trading plan, with underlying trade prices between $1,311.45 and $1,406.04 per share.
Were Maurice Sciammas’s MPWR stock sales pre-planned?
Yes. The transactions were executed under a Rule 10b5-1 trading plan adopted on November 24, 2025. Such plans schedule trades in advance, helping separate an insider’s trading activity from any access to nonpublic information.
What indirect MPWR holdings does Sciammas report in this filing?
He reports indirect ownership of common stock through several family-related entities, including the Sciammas Family Trust, multiple 2020 irrevocable trusts, Various Sciammas GRATs, and a Rosalind Sciammas brokerage account. In total, there are 11 indirect holding entries.