MONOLITHIC POWER SYSTEMS INC - COMMON STOCK (MPWR) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / COMMON STOCK
Symbol
MPWR on Nasdaq
Shares outstanding
47,915,757
Price per share
$1161.78
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
47,388,570
Total reported value
$42,943,604,846
% of total 13F portfolios
0.02%
Share change
+716,571
Value change
+$641,565,306
Number of holders
1,035
Price from insider filings
$1161.78
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of MONOLITHIC POWER SYSTEMS INC - COMMON STOCK (MPWR) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
VANGUARD GROUP INC 12% $4,344,359,487 5,939,946 The Vanguard Group 30 Jun 2025
BlackRock, Inc. 10% +4% $4,440,605,266 +$203,578,448 4,899,383 +4.8% BlackRock, Inc. 31 Dec 2025
FMR LLC 8.3% $3,604,601,251 3,977,008 FMR LLC 31 Dec 2025

As of 31 Dec 2025, 1,035 institutional investors reported holding 47,388,570 shares of MONOLITHIC POWER SYSTEMS INC - COMMON STOCK (MPWR). This represents 99% of the company’s total 47,915,757 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of MONOLITHIC POWER SYSTEMS INC - COMMON STOCK (MPWR) together control 68% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
VANGUARD GROUP INC 13% 6,034,394 -0.65% 0.08% $5,469,333,346
BlackRock, Inc. 12% 5,962,391 +4.1% 0.09% $5,404,072,656
FMR LLC 8.3% 3,977,008 +12% 0.18% $3,604,600,851
STATE STREET CORP 4.6% 2,180,419 +2.1% 0.07% $1,979,609,520
PRICE T ROWE ASSOCIATES INC /MD/ 3.5% 1,691,394 +7.5% 0.17% $1,533,013,000
Invesco Ltd. 3% 1,434,689 +26% 0.2% $1,300,344,794
GEODE CAPITAL MANAGEMENT, LLC 2.9% 1,382,280 +3.3% 0.08% $1,248,435,634
FRANKLIN RESOURCES INC 2.2% 1,049,409 -0.25% 0.23% $951,142,476
NORGES BANK 1.5% 726,705 0.07% $658,656,344
T. Rowe Price Investment Management, Inc. 1.5% 724,494 -3.5% 0.41% $656,653,000
FIRST TRUST ADVISORS LP 1.5% 701,454 +57% 0.46% $635,770,374
MORGAN STANLEY 1.4% 649,070 +16% 0.04% $588,293,698
BARCLAYS PLC 1.3% 604,802 +67% 0.22% $548,168,340
GOLDMAN SACHS GROUP INC 1.2% 593,662 +37% 0.08% $538,071,458
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 1.2% 570,719 +2.5% 0.17% $517,276,874
BANK OF AMERICA CORP /DE/ 1.1% 549,575 -24% 0.04% $498,112,749
JPMORGAN CHASE & CO 1.1% 512,273 -41% 0.03% $464,305,775
VAN ECK ASSOCIATES CORP 1% 502,312 -31% 0.38% $455,276,000
BROWN ADVISORY INC 1% 500,755 -31% 0.63% $453,887,111
NORTHERN TRUST CORP 1% 483,700 -0.44% 0.06% $438,406,331
UBS Group AG 0.92% 438,985 -17% 0.08% $397,878,444
Rafferty Asset Management, LLC 0.83% 396,464 +4.5% 1.2% $359,339,111
WELLINGTON MANAGEMENT GROUP LLP 0.8% 384,770 -15% 0.06% $348,740,137
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.76% 365,384 +2.1% 0.05% $331,169,442
Legal & General Group Plc 0.74% 356,639 -0.5% 0.07% $323,243,329

Institutional Holders of MONOLITHIC POWER SYSTEMS INC - COMMON STOCK (MPWR) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 47,388,570 $42,943,604,846 +$641,565,306 $906.36 1,035
2025 Q3 46,598,649 $42,881,394,598 -$553,001,200 $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
2020 Q2 42,823,926 $10,170,291,358 +$97,254,699 $237.00 397
2020 Q1 42,490,931 $7,116,341,479 +$34,814,384 $167.46 348
2019 Q4 41,838,285 $7,450,515,487 -$73,246,939 $178.02 349
2019 Q3 42,351,592 $6,591,532,706 +$52,861,063 $155.63 343
2019 Q2 42,040,561 $5,705,771,067 +$206,501,579 $135.78 339
2019 Q1 41,736,982 $5,655,841,352 -$86,747,874 $135.49 341
2018 Q4 42,451,324 $4,934,913,814 +$217,806,322 $116.25 334
2018 Q3 40,463,736 $5,079,641,448 +$61,916,551 $125.53 350
2018 Q2 39,899,582 $5,333,990,585 +$129,032,744 $133.67 341
2018 Q1 38,996,384 $4,514,731,100 +$114,994,661 $115.77 325
2017 Q4 38,439,899 $4,319,265,532 -$103,793,423 $112.36 318
2017 Q3 39,361,866 $4,194,367,387 +$50,635,188 $106.55 291
2017 Q2 38,916,034 $3,752,216,354 +$64,874,945 $96.40 283
2017 Q1 38,307,935 $3,528,140,646 +$259,835,652 $92.10 286
2016 Q4 39,266,525 $3,218,544,717 -$27,440,306 $81.93 263
2016 Q3 39,555,200 $3,183,026,431 +$168,636,593 $80.50 240
2016 Q2 39,471,515 $2,696,704,897 +$36,924,568 $68.32 209
2016 Q1 39,192,404 $2,490,943,966 +$99,987,403 $63.64 197
2015 Q4 37,627,753 $2,397,322,686 -$49,743,881 $63.71 191
2015 Q3 38,408,694 $1,966,058,416 +$72,980,434 $51.20 178
2015 Q2 37,204,401 $1,886,652,193 +$30,569,520 $50.71 178
2015 Q1 36,538,309 $1,923,031,117 -$13,631,853 $52.65 177
2014 Q4 36,864,580 $1,833,337,638 -$12,959,562 $49.74 169
2014 Q3 37,165,175 $1,637,185,627 -$771,817 $44.05 173
2014 Q2 37,224,227 $1,576,398,316 -$20,145,088 $42.35 158
2014 Q1 37,700,139 $1,461,102,651 +$22,829,601 $38.77 148