Compensation award — excluded from discretionary-purchase analysis.
Written from the filing's own figures. OQRO describes what was reported and never tells you what to buy or sell
View the official recordSEC Form 4 — Statement of Changes in Beneficial OwnershipAll the details
Dates, kept separate
Transaction date
Oct 25, 2025
Reporting period
Not applicable
Filed with the SEC
Oct 29, 2025
OfficerGrant / award
Context
Classification
grant award
Code A — grant or award
Planned / mechanical clue
Footnote references vesting of compensation awards
Only flagged when a footnote says so; never inferred
Source receipt
Record ID
0001214659-25-015475
Filed / recorded
Oct 29, 2025, 1:36 AM UTC
Added to OQRO
Oct 2, 2026, 12:28 PM UTC
Parser
form4-xml-v1
Data quality
Verified: identifiers matched exactly
Issuer
MONOLITHIC POWER SYSTEMS INC
Issuer CIK
1280452
Ticker
MPWR
Reporting person
Deming Xiao
Relationship
Officer
Officer title
EVP, Global Operations
Security
Common Stock
Table
Non-derivative (Table I)
Transaction date
Oct 25, 2025
Transaction code
A
Shares / units
135,520
Price per share
$0.00
Acquired / disposed
Acquired (A)
Shares owned after
256,180
Ownership form
Direct
Amendment
No
Footnotes from the filing
On October 25, 2022, the reporting person was granted market-based restricted stock units ("MSUs") subject to the achievement of five stock price targets and relative total stockholder return percentile rank over a three-year performance and vesting period. On October 25, 2025, the Company's Compensation Committee of the Board of Directors certified and approved the achievement of the performance criteria for the MSUs, which resulted in 135,520 shares being awarded to the reporting person. All of the shares fully vested on October 25, 2025, pursuant to the grant agreement.
