Xiao Deming's Form 4 filing
Monolithic Power Systems, Inc. (MPWR) · filed May 8, 2026
- Accession no.
- 0001214659-26-005858
- Filed
- May 8, 2026
- Trade date
- May 6, 2026
- Filing delay
- 2 days
- Rule 10b5-1 plan
- Not checked
This filing lists 4 non-derivative transactions. Open-market sales total $49.6M. It was filed 2 days after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Xiao DemingCIK 0001308647 | Officer (EVP, Global Operations) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| May 6, 2026 | Common Stock | SSaleDisposed | −3,329 | $1,648.38F2 | −$5,487,457.02 | 232,630 | Direct | |
| May 6, 2026 | Common Stock | SSaleDisposed | −14,167 | $1,652.80F3 | −$23,415,217.6 | 218,463 | Direct | |
| May 6, 2026 | Common Stock | SSaleDisposed | −11,597 | $1,657.93F4 | −$19,227,014.21 | 206,866 | Direct | |
| May 6, 2026 | Common Stock | SSaleDisposed | −907 | $1,661.38F5 | −$1,506,871.66 | 205,959 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- 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 $1,645.48 to $1,650.43. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $1,650.75 to $1,655.75. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $1,655.80 to $1,660.72. 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.
Referenced by the price of 1 transaction in Table I.
- 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 $1,660.99 to $1,662 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.
Referenced by the price of 1 transaction in Table I.