13F reference period
Q2 2026
Security Snapshot
MONOLITHIC POWER SYSTEMS, INC. - COMMON STOCK (MPWR) Institutional Ownership
CUSIP: 609839105
13F Institutional Holders and Ownership History from Q1 2014 to Q3 2026
Institutions Reporting
1,251
Shares (Excl. Options)
47.6M
Full value: 47,598,793 · shares · 30 Jun 2026Price
$1382.36
The headline uses the Q2 2026 reference period after its reporting deadline. Available reports may still be incomplete or amended. Newer periods in the history table contain incoming reports and may be incomplete.
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- Security type / class
- Equity / COMMON STOCK
- Symbol
- MPWR on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 47,598,793
- Total 13F value
- $65,610,701,212
- Portfolio coverage rank
- 0.02%
- Share change
- +1,864,226
- Value change
- +$2,886,762,331
- Number of holders
- 1,251
- Shares outstanding
- 48,904,766
- SEC-reported price per share
- $1319.23
- Insider filing price
- $1319.23
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Filing notes and source
Key facts
- MPWR - MONOLITHIC POWER SYSTEMS, INC. - COMMON STOCK is tracked under CUSIP 609839105.
- 1251 institutions reported positions in Q2 2026.
- 5 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 1,120 to 1,251 between Q1 2026 and Q2 2026.
- SEC-reported value moved from to
$49.94B
Full value: $49,939,712,172 · USD · 31 Mar 2026.$65.61B
Full value: $65,610,701,212 · USD · 30 Jun 2026
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 1251 institutions filings for Q2 2026.
Security key
609839105
13F reference period
Q2 2026
13F holders
1,251
13D/G owners
5
CIK / CUSIP context first
Open Q2 2026 holders
MPWR full holder history
MONOLITHIC POWER SYSTEMS, INC. SEC filings
MONOLITHIC POWER SYSTEMS, INC. company facts
MONOLITHIC POWER SYSTEMS, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 609839105:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
5
Security
MPWR
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 10% | +4% | $4,440,605,266 | +$203,578,448 | 4,899,383 | +4.8% | BlackRock, Inc. | 31 Dec 2025 |
| FMR LLC | 9.1% | -13% | $5,871,013,793 | -$956,342,808 | 4,450,334 | -14% | FMR LLC | 30 Sep 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | 7.2% | $3,894,366,547 | 3,561,866 | Vanguard Capital Management | 31 Mar 2026 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.1% | $2,765,003,682 | 2,528,928 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| Invesco Ltd. | 5.2% | $3,471,078,313 | 2,510,980 | Invesco Ltd. | 31 Dec 2025 |
As of 30 Jun 2026,
1,251
institutional investors reported holding
shares of
MONOLITHIC POWER SYSTEMS, INC. - COMMON STOCK (MPWR).
This represents
97%
of the company’s total
outstanding shares.
47.6M
Full value: 47,598,793 · shares · 30 Jun 202648.9M
Full value: 48,904,766 · shares · Stored outstanding share count13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
66%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11% | 5,589,925 | -7.9% | 0.12% | $7,727,288,729 |
| FMR LLC | 11% | 5,177,258 | +18% | 0.31% | $7,156,835,733 |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.4% | 3,126,756 | +1.4% | 0.09% | $4,322,302,424 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.1% | 2,504,858 | -0.46% | 0.16% | $3,462,615,505 |
| Invesco Ltd. | 4.8% | 2,343,930 | +127% | 0.26% | $3,240,155,614 |
| STATE STREET CORP | 4.7% | 2,282,186 | +4.3% | 0.09% | $3,159,218,647 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.4% | 1,195,281 | -17% | 0.09% | $1,646,916,316 |
| PRICE T ROWE ASSOCIATES INC /MD/ | 2% | 976,798 | -23% | 0.14% | $1,350,287,000 |
| FRANKLIN RESOURCES INC | 1.7% | 811,974 | -13% | 0.24% | $1,122,440,295 |
| GOLDMAN SACHS GROUP INC | 1.6% | 780,650 | +37% | 0.11% | $1,079,139,564 |
| NORGES BANK | 1.5% | 751,399 | 0.1% | $1,038,703,922 | |
| VAN ECK ASSOCIATES CORP | 1.5% | 746,237 | +42% | 0.63% | $1,031,568,179 |
| MORGAN STANLEY | 1.5% | 727,885 | +11% | 0.05% | $1,006,202,933 |
| BANK OF AMERICA CORP /DE/ | 1.1% | 536,236 | +40% | 0.05% | $741,270,823 |
| ROYAL BANK OF CANADA | 1% | 487,212 | +2.9% | 0.11% | $673,502,000 |
| FIRST TRUST ADVISORS LP | 0.99% | 482,781 | -18% | 0.39% | $667,377,220 |
| NORTHERN TRUST CORP | 0.98% | 479,492 | -2% | 0.08% | $662,830,561 |
| BARCLAYS PLC | 0.97% | 474,132 | -15% | 0.21% | $655,421,109 |
| Rafferty Asset Management, LLC | 0.94% | 459,278 | +45% | 1.4% | $634,887,536 |
| UBS Group AG | 0.92% | 449,479 | -17% | 0.1% | $621,341,790 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 0.9% | 442,176 | -22% | 0.21% | $611,191,983 |
| JPMORGAN CHASE & CO | 0.89% | 434,949 | -22% | 0.03% | $570,990,784 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.8% | 388,951 | +3.3% | 0.07% | $537,670,305 |
| Legal & General Group Plc | 0.74% | 359,936 | -5.3% | 0.1% | $497,561,126 |
| VOYA INVESTMENT MANAGEMENT LLC | 0.7% | 340,269 | -14% | 0.41% | $469,692,909 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
51
Headline period
Q2 2026
Rows shown
1-25 of 51
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q3 | 2,699,994 | $3,636,855,628 | +$55,848,181 | $1347.22 | 524 |
| 2026 Q2 | 47,598,793 | $65,610,701,212 | +$2,886,762,331 | $1382.36 | 1,251 |
| 2026 Q1 | 45,771,877 | $49,939,712,172 | -$1,733,161,329 | $1093.35 | 1,120 |
| 2025 Q4 | 47,667,135 | $43,197,348,662 | +$748,167,007 | $906.36 | 1,055 |
| 2025 Q3 | 46,597,013 | $42,879,888,431 | -$553,016,851 | $920.64 | 971 |
| 2025 Q2 | 47,319,591 | $34,604,458,962 | +$1,173,714,219 | $731.38 | 896 |
| 2025 Q1 | 46,061,486 | $26,700,920,271 | -$286,601,097 | $579.98 | 848 |
| 2024 Q4 | 46,496,915 | $27,530,887,700 | -$375,710,095 | $591.70 | 848 |
| 2024 Q3 | 46,241,327 | $42,731,203,371 | -$427,288,195 | $924.50 | 866 |
| 2024 Q2 | 46,878,387 | $38,519,520,474 | +$907,307,790 | $821.68 | 829 |
| 2024 Q1 | 45,912,491 | $31,091,246,206 | +$223,402,574 | $677.42 | 796 |
| 2023 Q4 | 45,402,028 | $28,629,807,533 | -$418,776,941 | $630.78 | 725 |
| 2023 Q3 | 45,982,739 | $21,242,239,379 | -$481,094,575 | $462.00 | 649 |
| 2023 Q2 | 46,640,420 | $25,183,815,752 | +$71,548,693 | $540.23 | 644 |
| 2023 Q1 | 46,369,939 | $23,198,306,260 | -$181,669,790 | $500.54 | 658 |
| 2022 Q4 | 47,017,508 | $16,624,837,267 | +$359,311,854 | $353.61 | 597 |
| 2022 Q3 | 45,983,338 | $16,720,600,237 | +$788,203,527 | $363.40 | 618 |
| 2022 Q2 | 43,709,252 | $16,792,098,001 | -$82,246,755 | $384.04 | 609 |
| 2022 Q1 | 43,853,705 | $21,267,523,237 | +$130,242,076 | $485.68 | 598 |
| 2021 Q4 | 43,564,292 | $21,489,393,439 | -$228,912,278 | $493.33 | 609 |
| 2021 Q3 | 43,483,682 | $21,075,138,239 | +$250,126,712 | $484.68 | 565 |
| 2021 Q2 | 42,846,046 | $15,982,432,031 | +$416,974,703 | $373.45 | 518 |
| 2021 Q1 | 42,738,703 | $15,095,910,243 | +$67,555,402 | $353.21 | 523 |
| 2020 Q4 | 42,520,318 | $15,566,068,580 | -$7,548,319 | $366.23 | 505 |
| 2020 Q3 | 42,417,552 | $11,858,147,686 | -$118,457,404 | $279.61 | 431 |