X0202
4
2008-04-23
0
0001280452
MONOLITHIC POWER SYSTEMS INC
MPWR
0001308676
Hsing Michael
6409 GUADALUPE MINES ROAD
SAN JOSE
CA
95120
1
1
0
0
CEO
Common Stock
2008-04-23
4
S
0
100
20.69
D
51397
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
20.74
D
51297
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
20.81
D
51197
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
20.82
D
51097
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
20.85
D
50997
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
200
20.86
D
50797
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
20.88
D
50697
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
180
20.9
D
50517
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
302
20.91
D
50215
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
18
20.92
D
50197
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
20.94
D
50097
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
200
20.99
D
49897
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
4800
21
D
45097
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
200
21.02
D
44897
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
21.03
D
44797
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
200
21.04
D
44597
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
21.05
D
44497
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
200
21.08
D
44297
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
200
21.1
D
44097
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
21.11
D
43997
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
200
21.13
D
43797
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
21.14
D
43697
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
21.15
D
43597
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
300
21.16
D
43297
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
50
21.17
D
43247
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
50
21.18
D
43197
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
300
21.26
D
42897
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
21.3
D
42797
I
By Jointly w/Spouse
Common Stock
2008-04-23
4
S
0
100
21.33
D
42697
I
By Jointly w/Spouse
Common Stock
852144
D
In accordance with the reporting person's 10b5-1 trading plan.
By: Rick Neely For: Michael Hsing
2008-04-23