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 S  AS  JS*  OS  OS*  3
 JB
 JS
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Detailed Insider History for:
MONOLITHIC POWER SYSTEMS INC: MPWR
Price: 9/12/25 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
$834.14 $954.00 $438.86 $39,949 48 559 0.8% 4.7% 101.47% 3.28%
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
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$2,270,901
2,500
---
10/1/24
$892.66
$925.12
59,178
-4.1
D
---
10/2/24 - 11:08:20 am
2
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$2,260,506
2,500
---
9/3/24
$893.29
$919.73
61,678
-3.9
D
---
9/3/24 - 7:40:49 pm
3
    
 
MOYER JAMES C
DIR
JS
---
11,731
---
8/29/24
---
---
---
All
I
---
8/29/24 - 5:38:24 pm
4
1y
311
14%
33%
1
XIAO DEMING
VP,OO
S
$8,796,050
9,259
---
8/27/24
---
$950.00
20,455
-31.2
I
---
8/29/24 - 5:05:09 pm
5
1y
311
14%
33%
1
XIAO DEMING
VP,OO
S
$9,500,000
10,000
---
8/22/24
---
$950.00
29,714
-25.2
I
---
8/22/24 - 7:48:19 pm
6
    
 
XIAO DEMING
VP,OO
JS
---
8,968
---
8/22/24
---
---
163,105
-5.2
D
---
8/22/24 - 7:48:19 pm
7
    
 
XIAO DEMING
VP,OO
JB
---
8,968
---
8/22/24
---
---
39,714
29.2
I
---
8/22/24 - 7:48:19 pm
8
    
 
XIAO DEMING
VP,OO
JS
---
30,291
---
8/19/24
---
---
172,073
-15.0
D
---
8/21/24 - 4:28:49 pm
9
    
 
XIAO DEMING
VP,OO
JB
---
30,291
---
8/19/24
---
---
30,746
6,657.4
I
---
8/21/24 - 4:28:49 pm
10
1y
88
30%
24%
2
CHANG KUO WEI HERBERT
DIR
S
$178,688
200
---
8/15/24
$888.88
$898.00
541
-27.0
D
---
8/15/24 - 4:10:10 pm
11
    
 
MOYER JAMES C
DIR
JS
---
22,000
---
8/8/24
---
---
11,731
-65.2
I
---
8/12/24 - 6:09:18 pm
12
1y
311
14%
33%
1
XIAO DEMING
VP,OO
S
$668,637
859
---
8/8/24
---
$778.39
202,354
-0.4
D
R
8/12/24 - 2:41:11 pm
13
1y
195
13%
38%
1
TSENG SARIA
VP,GC
S
$668,637
859
---
8/8/24
---
$778.39
160,506
-0.5
D
R
8/12/24 - 2:40:07 pm
14
1y
249
18%
29%
1
SCIAMMAS MAURICE
VP,SO
S
$668,637
859
---
8/8/24
---
$778.39
114,812
-0.7
D
R
8/12/24 - 2:38:40 pm
15
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$566,668
728
---
8/8/24
---
$778.39
64,178
-1.1
D
R
8/12/24 - 2:37:12 pm
16
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$2,171,708
2,790
---
8/8/24
---
$778.39
865,332
-0.3
D
R
8/12/24 - 2:35:55 pm
17
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$2,131,264
2,500
---
8/1/24
$842.43
$859.12
64,906
-3.7
D
---
8/2/24 - 6:11:00 pm
18
1y
311
14%
33%
1
XIAO DEMING
VP,OO
S
$2,665,214
3,205
---
7/22/24
---
$831.58
203,213
-1.6
D
R
7/24/24 - 4:44:52 pm
19
1y
195
13%
38%
1
TSENG SARIA
VP,GC
S
$2,665,214
3,205
---
7/22/24
---
$831.58
161,365
-1.9
D
R
7/24/24 - 4:43:11 pm
20
1y
249
18%
29%
1
SCIAMMAS MAURICE
VP,SO
S
$2,665,214
3,205
---
7/22/24
---
$831.58
115,671
-2.7
D
R
7/24/24 - 4:41:54 pm
21
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$7,994,810
9,614
---
7/22/24
---
$831.58
868,122
-1.1
D
R
7/24/24 - 4:40:24 pm
22
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$2,145,477
2,580
---
7/22/24
---
$831.58
67,406
-3.7
D
R
7/24/24 - 4:39:09 pm
23
1y
249
18%
29%
1
SCIAMMAS MAURICE
VP,SO
S
$9,281,285
10,999
---
7/8/24
$839.89
$848.48
118,876
-8.5
D
---
7/10/24 - 11:22:17 am
24
1y
195
13%
38%
1
TSENG SARIA
VP,GC
S
$1,532,200
1,858
---
7/2/24
---
$824.65
164,570
-1.1
D
---
7/2/24 - 6:27:53 pm
25
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$2,010,485
2,500
---
7/1/24
$794.59
$807.88
69,986
-3.4
D
---
7/2/24 - 6:24:42 pm
26
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$2,149,816
2,672
---
7/1/24
$794.69
$807.88
877,736
-0.3
D
---
7/2/24 - 11:28:56 am
27
1y
195
13%
38%
1
TSENG SARIA
VP,GC
S
$29,978,650
37,093
---
7/1/24
$794.69
$816.34
166,428
-18.2
D
---
7/2/24 - 11:26:59 am
28
1y
15
7%
33%
1
LEE VICTOR K
DIR
S
$820,460
1,000
---
6/28/24
---
$820.46
29,232
-3.3
D
---
7/1/24 - 6:43:07 pm
29
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$5,848,606
8,000
---
6/3/24
$714.56
$746.35
880,408
-0.9
D
---
6/5/24 - 2:15:43 pm
30
1y
311
14%
33%
1
XIAO DEMING
VP,OO
S
$1,000,220
1,300
---
5/22/24
---
$769.40
206,418
-0.6
D
---
5/22/24 - 8:20:47 pm
31
1y
88
30%
24%
2
CHANG KUO WEI HERBERT
DIR
S
$150,000
200
---
5/20/24
---
$750.00
741
-21.3
D
---
5/22/24 - 6:09:57 pm
32
1y
28
14%
36%
1
ZHOU JEFF
DIR
S
$150,000
200
---
5/20/24
---
$750.00
6,069
-3.2
D
---
5/22/24 - 6:01:04 pm
33
1y
88
30%
24%
2
CHANG KUO WEI HERBERT
DIR
S
$147,000
200
---
5/15/24
$730.00
$740.00
941
-17.5
D
---
5/15/24 - 6:52:40 pm
34
    
 
SCIAMMAS MAURICE
VP,SO
JS
---
5,072
---
5/13/24
---
---
13,424
-27.4
I
---
5/15/24 - 5:21:48 pm
35
    
 
SCIAMMAS MAURICE
VP,SO
JB
---
5,072
---
5/13/24
---
---
32,064
18.8
I
---
5/15/24 - 5:21:48 pm
36
    
 
XIAO DEMING
VP,OO
JS
---
29
---
5/10/24
---
---
207,718
-0.0
D
---
5/10/24 - 6:39:39 pm
37
1y
195
13%
38%
1
TSENG SARIA
VP,GC
S
$599,627
869
---
5/8/24
---
$690.02
203,521
-0.4
D
R
5/9/24 - 12:53:26 pm
38
1y
249
18%
29%
1
SCIAMMAS MAURICE
VP,SO
S
$599,610
869
---
5/8/24
---
$690.00
129,875
-0.7
D
R
5/9/24 - 12:52:07 pm
39
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$508,515
737
---
5/8/24
---
$689.98
74,986
-1.0
D
R
5/9/24 - 12:50:40 pm
40
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$1,948,560
2,824
---
5/8/24
---
$690.00
888,408
-0.3
D
R
5/9/24 - 12:49:21 pm
41
1y
311
14%
33%
1
XIAO DEMING
VP,OO
S
$599,627
869
---
5/8/24
---
$690.02
207,747
-0.4
D
R
5/9/24 - 12:47:39 pm
42
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$1,658,215
2,500
---
5/1/24
$658.90
$670.08
75,723
-3.2
D
---
5/3/24 - 11:41:39 am
43
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$5,294,840
8,000
---
5/1/24
$652.81
$670.09
891,232
-0.9
D
---
5/3/24 - 11:40:25 am
44
1y
249
18%
29%
1
SCIAMMAS MAURICE
VP,SO
S
$7,500,104
11,000
---
4/8/24
$668.76
$690.15
130,744
-7.8
D
---
4/9/24 - 11:14:56 am
45
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$5,419,521
8,000
---
4/1/24
$670.56
$687.45
899,232
-0.9
D
---
4/3/24 - 7:03:34 pm
46
    
 
SCIAMMAS MAURICE
VP,SO
JS
---
1,172
---
4/1/24
---
---
22,098
-5.0
I
---
4/3/24 - 6:31:04 pm
47
    
 
SCIAMMAS MAURICE
VP,SO
JB
---
1,172
---
4/1/24
---
---
26,992
4.5
I
---
4/3/24 - 6:31:04 pm
48
1y
137
20%
35%
1
BLEGEN THEODORE
VP,CFO
S
$1,693,493
2,500
---
4/1/24
$670.56
$687.44
78,223
-3.1
D
---
4/3/24 - 4:17:56 pm
49
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
S
$5,665,208
7,800
---
3/1/24
$718.52
$733.37
907,232
-0.9
D
---
3/4/24 - 11:09:33 am
50
1y
290
32%
18%
1
HSING MICHAEL
CEO,DIR
JS*
$143,413
200
---
3/1/24
$716.82
$717.31
914,993
-0.0
D
---
3/4/24 - 11:09:33 am
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