MONOLITHIC POWER SYSTEMS INC — Director's Dealing 2014

Aug 5, 2014

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MONOLITHIC POWER SYSTEMS INC (MPWR)
CIK: 0001280452
Period of Report: 2014-08-01

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2014-08-04	Common Stock	S	1935.0	$41.41	Disposed	78087	Direct
2014-08-04	Common Stock	S	92.0	$41.41	Disposed	77995	Direct
2014-08-04	Common Stock	S	263.0	$41.41	Disposed	77732	Direct
2014-08-04	Common Stock	S	14.0	$41.41	Disposed	77718	Direct
2014-08-05	Common Stock	S	818.0	$41.1197	Disposed	76900	Direct
2014-08-05	Common Stock	S	7595.0	$42.008	Disposed	69305	Direct
2014-08-01	Common Stock	S	261.0	$41.4296	Disposed	5602	Indirect
2014-08-01	Common Stock	S	2774.0	$41.3744	Disposed	2828	Indirect
2014-08-04	Common Stock	S	103.0	$41.41	Disposed	2725	Indirect
2014-08-04	Common Stock	S	6.0	$41.41	Disposed	2719	Indirect
2014-08-04	Common Stock	S	237.0	$41.41	Disposed	2482	Indirect
2014-08-04	Common Stock	S	12.0	$41.41	Disposed	2470	Indirect

Footnotes

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

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 $42.00 to $42.092. 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.