Hsing Michael 4
4 · MONOLITHIC POWER SYSTEMS INC · Filed Feb 17, 2026
Research Summary
AI-generated summary of this filing
Monolithic Power (MPWR) CEO Michael Hsing Sells 33,000 Shares
What Happened
Michael Hsing, CEO and Director of Monolithic Power Systems, reported open-market sales of a total of 33,000 shares on February 12, 2026. The transactions were reported as sales (code S) executed under a Rule 10b5-1 trading plan adopted 08/28/2025. Proceeds across the trades totaled approximately $38,670,257, with individual sale prices (per line) ranging from roughly $1,152.31 up to $1,218.82 per share (see footnotes for detailed price ranges and weighted averages).
Key Details
- Transaction date: 2026-02-12 (reported on Form 4 filed 2026-02-17). Filing appears timely (filed after the Presidents' Day holiday).
- Total shares sold: 33,000; approximate total proceeds: $38,670,257.
- Individual reported lots and proceeds: e.g., 12,731 sh @ $1,155.71 = $14.71M; 4,992 sh @ $1,159.84 = $5.79M; other lots range from 160 to 3,640 shares as listed on the Form 4.
- Price details: footnotes state weighted-average prices per line and underlying price ranges (overall range in these lines ≈ $1,152.31–$1,218.82). The filer offers to provide the number sold at each separate price on request.
- Plan/authorization: Transactions were made pursuant to a 10b5-1 trading plan adopted 08/28/2025 (footnote F1).
- Shares owned after the transaction: not specified in the provided excerpt—see the full Form 4 for post-transaction holdings.
- Transaction code: S = Sale.
Context
These were prearranged open-market sales under a 10b5-1 plan, which typically indicate scheduled, non-discretionary dispositions rather than ad-hoc trades; such sales are common for insiders managing diversification or tax/liquidity needs. This Form 4 shows a material dollar amount ($38.7M) but, by itself, does not explain the insider’s motivation.
Insider Transaction Report
Form 4
Hsing Michael
DirectorCEO
Transactions
- Sale
Common Stock
[F1][F2]2026-02-12$1155.71/sh−12,731$14,713,344→ 908,503 total - Sale
Common Stock
[F1][F3]2026-02-12$1159.84/sh−4,992$5,789,921→ 903,511 total - Sale
Common Stock
[F1][F4]2026-02-12$1164.92/sh−4,001$4,660,845→ 899,510 total - Sale
Common Stock
[F1][F5]2026-02-12$1168.80/sh−2,076$2,426,429→ 897,434 total - Sale
Common Stock
[F1][F6]2026-02-12$1173.39/sh−200$234,678→ 897,234 total - Sale
Common Stock
[F1][F7]2026-02-12$1180.79/sh−480$566,779→ 896,754 total - Sale
Common Stock
[F1][F8]2026-02-12$1188.23/sh−160$190,117→ 896,594 total - Sale
Common Stock
[F1][F9]2026-02-12$1194.34/sh−600$716,604→ 895,994 total - Sale
Common Stock
[F1][F10]2026-02-12$1200.81/sh−1,440$1,729,166→ 894,554 total - Sale
Common Stock
[F1][F11]2026-02-12$1205.82/sh−3,640$4,389,185→ 890,914 total - Sale
Common Stock
[F1][F12]2026-02-12$1210.11/sh−1,240$1,500,536→ 889,674 total - Sale
Common Stock
[F1][F13]2026-02-12$1217.12/sh−1,440$1,752,653→ 888,234 total
Holdings
- 133,040(indirect: By Trust)
Common Stock
- 12,825(indirect: By Trust)
Common Stock
Footnotes (13)
- [F1]These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 08/28/2025.
- [F10]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 $1,197.57 to $1,202.33. 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.
- [F11]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 $1,202.70 to $1,207.63. 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.
- [F12]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 $1,207.93 to $1,212.36. 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.
- [F13]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 $1,214.09 to $1,218.82. 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.
- [F2]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 $1,152.31 to $1,157.31. 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.
- [F3]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 $1,157.38 to $1,162.38. 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.
- [F4]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 $1,162.42 to $1,167.20 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.
- [F5]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 $1,167.43 to $1,172.17. 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.
- [F6]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 $1,172.82 to $1,175.07. 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.
- [F7]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 $1,179.43 to $1,182.24. 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.
- [F8]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 $1,185.94 to $1,190.48. 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.
- [F9]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 $1,191.26 to $1,195.35. 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.
Signature
/s/ Saria Tseng, attorney-in-fact for Mr. Michael R. Hsing|2026-02-17