MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2014

Feb 11, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2014-02-07

Reporting Person: Tseng Saria (VP & General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-02-07	Common Stock	S	9979.0	$33.0	Disposed	78402	Direct
2014-02-07	Common Stock	S	827.0	$33.2255	Disposed	77575	Direct
2014-02-10	Common Stock	S	1305.0	$33.2063	Disposed	76270	Direct
2014-02-10	Common Stock	S	81.0	$33.2042	Disposed	76189	Direct
2014-02-11	Common Stock	S	1974.0	$34.4559	Disposed	74215	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2000	Indirect

Footnotes

F1: In accordance with the reporting person's 10b5-1 trading plan.

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 $32.40 to $33.93. 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: Shares sold to pay tax obligations resulting from the vesting of restricted stock units.

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 $34.12 to $34.77. 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.