Form Type: 4

SEC EDGAR Link
Accession Number:0001280452-20-000165
Date:2020-10-01
Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
Original Submission Date:

Reporting Person:

XIAO DEMING
5808 LAKE WASHINGTON BLVD NE
KIRKLAND, WA 98033

Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
Title of SecurityTransaction Date2a. Deemed Execution Date Transaction CodeSharesAcquired or DisposedPrice per share 5. Amount of Securities Beneficially Owned Following Reported Transaction 6. Ownership Form Direct or IndirectNature of Indirect Ownership
COMMON STOCK 2020-10-01 S 4,305 d $280.50 275,590 direct
COMMON STOCK 2020-10-01 0 $0.00 1,101 indirect
Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, convertible securities
Title of Derivative Security Conversion or Exercise Price of Derivative Security Transaction Date Deemed Execution Date Transaction Code Number of Derivative Securities Acquired (A) or Disposed of (D) Date ExercisableExpiration Date Title and Amount of Securities Underlying Derivative Security Price of Derivative Security Number of derivative Securities Beneficially Owned Following Reported Transaction(s) Ownership Form: Direct (D) or Indirect (I) Nature of Indirect Beneficial Ownership
Footnotes
IDfootnote
f1 the reported sales were to cover taxes upon the vesting of restricted stock units, as required by the company's equity incentive plans.
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