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MONOLITHIC POWER SYSTEMS INC Director's Dealing 2011

Feb 10, 2011

30057_dirs_2011-02-10_97bac8b4-2845-4ea3-93e9-55623482ba8f.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2011-02-10

Reporting Person: Xiao Deming (Pres. of MPS Asia Operations)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2011-02-10 Common Stock S 1393 $15.7442 Disposed 150035 Direct
2011-02-10 Common Stock S 267 $15.7442 Disposed 15573 Indirect

Footnotes

F1: Shares sold to pay tax obligations resulting from the vesting of restricted stock units.

F2: Represent shares owned by the reporting person's spouse.