Security key
609839105
MONOLITHIC POWER SYSTEMS INC - Common Stock (MPWR)
CUSIP: 609839105
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock
- Shares outstanding
- 49,129,186
- Total 13F shares
- 46,597,013
- Share change
- -818,909
- Total reported value
- $42,879,888,431
- Put/Call ratio
- 103%
- Reported price per share
- $920.64
- Number of holders
- 971
- Value change
- -$553,016,851
- Number of buys
- 507
- Number of sells
- 389
Security identity
Holder snapshot
Report period
Q3 2025
Institutions
971
Top holders
10
MPWR full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 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.
Lead holder
VANGUARD GROUP INC
13D/G signal
—
Evidence rows
15
Latest as of
30 Jun 2025
13F
Lead comparable stake: 12%
Showing 1-6 of 15 holder rows.
Rank 1 holder
VANGUARD GROUP INC
13F
- Ownership
- 12%
- Position
- $4.34B
Rank 2 holder
BlackRock, Inc.
13F
- Ownership
- 11%
- Position
- $3.82B
Rank 3 holder
FMR LLC
13F
- Ownership
- 6.9%
- Position
- $2.48B
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
Company
|
12%
|
$4,344,357,705
5,939,946 shares
|
— | 30 Jun 2025 |
| BlackRock, Inc. |
13F
Company
|
11%
|
$3,824,548,048
5,229,221 shares
|
— | 30 Jun 2025 |
| FMR LLC |
13F
Company
|
6.9%
|
$2,481,355,832
3,392,704 shares
|
— | 30 Jun 2025 |
| STATE STREET CORP |
13F
Company
|
4.3%
|
$1,553,828,423
2,120,034 shares
|
— | 30 Jun 2025 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
4.3%
|
$1,527,711,000
2,088,804 shares
|
— | 30 Jun 2025 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
2.7%
|
$962,038,507
1,318,541 shares
|
— | 30 Jun 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 Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
971
Shares
46,597,013
Rows available
971
| Investor | Option | Weight % | Change % | Reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* 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 failed the local validity check.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
896
Q3 2025 holders
971
Holder diff
75
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend