Activist 13D/13G Filings - MONOLITHIC POWER SYSTEMS INC (MPWR)

Real time Form 13D and 13G transaction reports:

  • Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company’s equity securities.
  • Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
  • Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
Time period
Reported
DateTime
TypeCompany
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev ReportFiling
2024-02-14
10:02 am
Sale
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
PRICE T ROWE ASSOCIATES INC2,197,039
4.6%
-1,454,469decrease
(-39.83%)
View
2024-02-13
4:55 pm
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
VANGUARD GROUP INC5,464,066
11.4%
345,755increase
(+6.76%)
View
2024-02-09
09:28 am
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
FMR LLC2,528,118
5.276%
1,095,415increase
(+76.46%)
View
2024-01-24
09:46 am
Sale
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
BlackRock Inc.
BLK
5,236,453
10.9%
-218,661decrease
(-4.01%)
View
2023-02-14
12:38 pm
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
PRICE T ROWE ASSOCIATES INC3,651,508
7.8%
3,651,508increase
(New Position)
View
2023-02-09
10:54 am
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
VANGUARD GROUP INC5,118,311
10.9%
324,257increase
(+6.76%)
View
2023-01-26
08:43 am
Unchanged
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
BlackRock Inc.
BLK
5,455,114
11.6%
0
(Unchanged)
View
2023-01-20
5:17 pm
Sale
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
BlackRock Inc.
BLK
5,455,114
11.6%
-524,817decrease
(-8.78%)
View
2022-02-10
08:27 am
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
VANGUARD GROUP INC4,794,054
10.4%
23,178increase
(+0.49%)
View
2022-01-28
1:54 pm
Sale
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
BlackRock Inc.
BLK
5,979,931
13%
-334,766decrease
(-5.30%)
View
2021-03-10
3:08 pm
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
VANGUARD GROUP INC4,770,876
10.46%
746,614increase
(+18.55%)
View
2021-02-10
11:28 am
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
VANGUARD GROUP INC4,024,262
8.92%
186,225increase
(+4.85%)
View
2021-01-26
2:20 pm
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
BlackRock Inc.
BLK
6,314,697
14%
1,729,501increase
(+37.72%)
View
2020-02-12
08:09 am
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
VANGUARD GROUP INC3,838,037
8.83%
177,714increase
(+4.86%)
View
2020-02-05
1:33 pm
Sale
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
FRANKLIN RESOURCES INC
BEN
2,121,463
4.9%
-133,115decrease
(-5.90%)
View
2020-02-04
12:16 pm
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
BlackRock Inc.
BLK
4,585,196
10.6%
210,288increase
(+4.81%)
View
2019-06-07
4:59 pm
Purchase
13GMONOLITHIC POWER SYSTEMS, INC
MPWR
BlackRock Inc.
BLK
4,374,908
10.2%
206,116increase
(+4.94%)
View