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Detailed Insider History for:
MONOLITHIC POWER SYSTEMS INC: MPWR
Price: 3/14/25 52-Wk
High		 52-Wk
Low		 Mkt Cap (mm) Shrs Out (mm) 3-Mth Ave
Vol (m)		 Ind. Yield Short Int
% Float		 Inst. Owned Insider Owned
$606.06 $959.64 $546.71 $29,010 48 875 1.0% 7.4% 99.67% 3.43%
Exch Sector Industry Sub-Industry
NasdaqGS Manufacturing Electronic And Other Electrical Equipment And Components, Except Computer Equipment Semiconductors & Related Devices
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#
View Form
Insider Statistics
T N H M S
Filer Name
Insider Title
Trans Type
Dollar Value
Shares Traded
Trans Date From
Trans Date To
Trans Price From
Trans Price To
Total Holdings
Delta % Owned
Owned
Other Info
Input Date
1
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$629,462
982
---
2/5/24
---
$641.00
142,577
-0.7
D
R
2/7/24 - 11:22:12 am
2
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$2,430,031
3,791
---
2/5/24
---
$641.00
917,983
-0.4
D
R
2/7/24 - 11:19:45 am
3
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$555,747
867
---
2/5/24
---
$641.00
83,901
-1.0
D
R
2/7/24 - 11:17:59 am
4
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$4,816,044
8,000
---
2/1/24
$594.81
$609.39
921,774
-0.9
D
---
2/5/24 - 11:25:32 am
5
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$1,508,138
2,500
---
2/1/24
$600.37
$609.39
84,768
-2.9
D
---
2/5/24 - 11:19:04 am
6
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$6,403,239
11,000
---
1/12/24
$577.66
$589.29
143,559
-7.1
D
---
1/12/24 - 5:57:20 pm
7
1y
305
12%
34%
1
XIAO DEMING
PR,OO
S
$6,786,331
11,515
---
1/10/24
$584.39
$596.19
210,421
-5.2
D
---
1/11/24 - 11:37:13 am
8
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$834,000
1,390
---
1/9/24
---
$600.00
206,180
-0.7
D
---
1/10/24 - 11:34:48 am
9
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$4,578,223
8,000
---
1/5/24
$568.36
$577.01
929,772
-0.9
D
---
1/9/24 - 12:42:32 pm
10
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$14,761,606
25,314
---
1/4/24
---
$583.14
207,570
-10.9
D
R
1/8/24 - 2:48:37 pm
11
1y
305
12%
34%
1
XIAO DEMING
PR,OO
S
$14,761,606
25,314
---
1/4/24
---
$583.14
221,936
-10.2
D
R
1/8/24 - 2:46:51 pm
12
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$16,129,069
27,659
---
1/4/24
---
$583.14
154,559
-15.2
D
R
1/8/24 - 2:44:58 pm
13
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$16,102,245
27,613
---
1/4/24
---
$583.14
87,268
-24.0
D
R
1/8/24 - 2:41:55 pm
14
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$34,203,492
58,654
---
1/4/24
---
$583.14
937,772
-5.9
D
R
1/8/24 - 2:39:27 pm
15
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$1,539,272
2,500
---
1/2/24
$610.93
$620.50
114,881
-2.1
D
---
1/3/24 - 11:18:11 am
16
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$1,578,398
2,500
---
12/18/23
$627.99
$634.67
117,381
-2.1
D
---
12/19/23 - 12:13:48 pm
17
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$11,166,000
18,610
---
12/13/23
---
$600.00
232,884
-7.4
D
---
12/14/23 - 2:03:28 pm
18
1y
250
36%
17%
1
MOYER JAMES C
DIR
S
$2,047,973
3,800
---
11/16/23
$538.34
$540.18
---
All
I
---
11/20/23 - 4:50:54 pm
19
    
 
MOYER JAMES C
DIR
JS
---
3,800
---
11/16/23
---
---
41,261
-8.4
I
---
11/20/23 - 4:50:54 pm
20
    
 
MOYER JAMES C
DIR
JB
---
3,800
---
11/16/23
---
---
3,800
New
I
---
11/20/23 - 4:50:54 pm
21
    
 
XIAO DEMING
PR,OO
JS
---
3,391
---
11/14/23
---
---
247,250
-1.4
D
---
11/16/23 - 5:03:08 pm
22
    
 
XIAO DEMING
PR,OO
JB
---
3,391
---
11/14/23
---
---
3,391
New
I
---
11/16/23 - 5:03:08 pm
23
1y
85
27%
25%
2
CHANG KUO WEI HERBERT
DIR
S
$209,456
400
---
11/14/23
---
$523.64
1,293
-23.6
D
---
11/15/23 - 5:40:44 pm
24
1y
85
27%
25%
2
CHANG KUO WEI HERBERT
DIR
S
$51,000
100
---
11/13/23
---
$510.00
1,693
-5.6
D
---
11/13/23 - 5:37:28 pm
25
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$349,158
712
---
11/8/23
---
$490.39
119,881
-0.6
D
R
11/9/23 - 6:05:40 pm
26
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$1,368,188
2,790
---
11/8/23
---
$490.39
996,426
-0.3
D
R
11/9/23 - 6:05:25 pm
27
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$421,245
859
---
11/8/23
---
$490.39
182,218
-0.5
D
R
11/9/23 - 6:05:13 pm
28
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$421,245
859
---
11/8/23
---
$490.39
251,494
-0.3
D
R
11/9/23 - 6:04:59 pm
29
1y
305
12%
34%
1
XIAO DEMING
PR,OO
S
$421,245
859
---
11/8/23
---
$490.39
250,641
-0.3
D
R
11/9/23 - 6:04:47 pm
30
1y
305
12%
34%
1
XIAO DEMING
PR,OO
S
$484,047
982
---
11/6/23
---
$492.92
251,500
-0.4
D
R
11/7/23 - 5:03:38 pm
31
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$484,047
982
---
11/6/23
---
$492.92
252,353
-0.4
D
R
11/7/23 - 5:02:50 pm
32
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$417,503
847
---
11/6/23
---
$492.92
120,593
-0.7
D
R
11/7/23 - 5:02:39 pm
33
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$1,868,167
3,790
---
11/6/23
---
$492.92
999,216
-0.4
D
R
11/7/23 - 5:02:26 pm
34
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$484,047
982
---
11/6/23
---
$492.92
183,077
-0.5
D
R
11/7/23 - 5:02:11 pm
35
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$1,972,982
4,305
---
10/2/23
---
$458.30
184,059
-2.3
D
R
10/4/23 - 4:22:14 pm
36
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$1,972,982
4,305
---
10/2/23
---
$458.30
253,335
-1.7
D
R
10/4/23 - 4:21:57 pm
37
1y
305
12%
34%
1
XIAO DEMING
PR,OO
S
$1,972,982
4,305
---
10/2/23
---
$458.30
252,482
-1.7
D
R
10/4/23 - 4:21:47 pm
38
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$414,762
905
---
10/2/23
---
$458.30
121,440
-0.7
D
R
10/4/23 - 4:21:36 pm
39
1y
85
27%
25%
2
CHANG KUO WEI HERBERT
DIR
S
$250,000
500
---
8/29/23
---
$500.00
1,793
-21.8
D
---
8/29/23 - 4:24:35 pm
40
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$383,923
724
---
8/8/23
---
$530.28
122,345
-0.6
D
R
8/10/23 - 6:02:36 pm
41
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$463,447
874
---
8/8/23
---
$530.26
188,339
-0.5
D
R
8/10/23 - 6:01:40 pm
42
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$1,503,817
2,836
---
8/8/23
---
$530.26
1,013,951
-0.3
D
R
8/10/23 - 6:01:08 pm
43
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$463,456
874
---
8/8/23
---
$530.27
257,623
-0.3
D
R
8/10/23 - 6:00:40 pm
44
1y
305
12%
34%
1
XIAO DEMING
PR,OO
S
$463,447
874
---
8/8/23
---
$530.26
256,770
-0.3
D
R
8/10/23 - 5:59:59 pm
45
1y
129
16%
38%
1
BLEGEN THEODORE
CFO
S
$448,595
852
---
8/4/23
---
$526.52
123,069
-0.7
D
R
8/7/23 - 5:03:52 pm
46
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$2,008,750
3,815
---
8/4/23
---
$526.54
1,016,787
-0.4
D
R
8/7/23 - 5:03:30 pm
47
1y
190
11%
39%
1
TSENG SARIA
VP,GC
S
$520,202
988
---
8/4/23
---
$526.52
258,497
-0.4
D
R
8/7/23 - 5:03:19 pm
48
1y
305
12%
34%
1
XIAO DEMING
PR,OO
S
$520,212
988
---
8/4/23
---
$526.53
257,644
-0.4
D
R
8/7/23 - 5:03:11 pm
49
1y
244
17%
30%
1
SCIAMMAS MAURICE
VP,SO
S
$520,202
988
---
8/4/23
---
$526.52
189,213
-0.5
D
R
8/7/23 - 5:02:55 pm
50
1y
283
31%
19%
1
HSING MICHAEL
CEO,DIR
S
$15,409,864
28,845
---
7/21/23
---
$534.23
1,020,602
-2.7
D
R
7/25/23 - 6:35:47 pm
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