Security key
609839105
MONOLITHIC POWER SYSTEMS INC - Common Stock (MPWR)
CUSIP: 609839105
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 47,667,001
- Total 13F value
- $43,197,227,155
- Share change
- +833,100
- Put/Call ratio
- 169%
- SEC-reported price per share
- $906.36
- Number of holders
- 1,054
- Value change
- +$747,384,818
- Number of buys
- 510
- Number of sells
- 443
- Shares outstanding
- 49,129,186
Holder snapshot
7 signals
Show 1 more signal
Security identity
1 source field
Report period
Q4 2025
Institutions
1,054
Top holders
10
MPWR full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
MONOLITHIC POWER SYSTEMS INC SEC filings
MONOLITHIC POWER SYSTEMS INC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 609839105
Recent filing periods:
Ownership snapshot
Top reported holders of MPWR - MONOLITHIC POWER SYSTEMS INC - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
15/15
Latest evidence
31 Dec 2025
13F
13D/G
Lead comparable stake: 10%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 10%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Comparable ownership
Top 5
BlackRock, Inc.
10%
FMR LLC
8.3%
VANGUARD GROUP INC
12%
STATE STREET CORP
4.3%
PRICE T ROWE ASSOCIATES INC /MD/
3.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
10%
from 13D/G
|
$5,272,297,648
5,726,774 shares
|
— | 30 Sep 2025 |
| FMR LLC |
13D/G
13F
Company
|
8.3%
|
$3,604,601,251
3,977,008 shares
|
$0 | 31 Dec 2025 |
| VANGUARD GROUP INC |
13F
Company
|
12%
|
$5,591,997,740
6,074,033 shares
|
— | 30 Sep 2025 |
| STATE STREET CORP |
13F
Company
|
4.3%
|
$1,968,577,775
2,134,704 shares
|
— | 30 Sep 2025 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
3.2%
|
$1,448,902,000
1,573,798 shares
|
— | 30 Sep 2025 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
2.7%
|
$1,226,828,661
1,337,697 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
1,054
Shares
47,667,001
Rows available
1,054
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
971
Q4 2025 holders
1,054
Holder diff
83
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend