What does CUSIP 609839105 represent in this 13F holders report?

CUSIP 609839105 is the security identifier for MPWR - MONOLITHIC POWER SYSTEMS INC - Common Stock used to aggregate holder disclosures.

How many institutions held MPWR - MONOLITHIC POWER SYSTEMS INC - Common Stock in Q4 2018?

334 institutional investors reported MPWR - MONOLITHIC POWER SYSTEMS INC - Common Stock for Q4 2018. Use the holders table for investor-level position and value details.

MONOLITHIC POWER SYSTEMS INC - Common Stock (MPWR)

CUSIP: 609839105

Q4 2018 13F Holders as of 31 Dec 2018

Type / Class: Equity / Common Stock
Shares outstanding: 49,129,186
Total 13F shares: 42,451,324
Share change: +1,922,554
Total reported value: $4,934,913,814
Put/Call ratio: 65%
Price per share: $116.25
Number of holders: 334
Value change: +$217,806,322
Number of buys: 164
Number of sells: 180

Quarterly Holders Quick Answers

What is CUSIP 609839105?
CUSIP 609839105 identifies MPWR - MONOLITHIC POWER SYSTEMS INC - Common Stock in SEC institutional holdings data.

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Jump to adjacent filing periods for faster comparison and easier crawl discovery.

Newer quarter: Q1 2019
Previous quarter: Q3 2018

Recent filing periods for CUSIP 609839105:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Top shareholders of MPWR - MONOLITHIC POWER SYSTEMS INC - Common Stock (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
BlackRock Finance, Inc.	13F	Company	8.5%	4,198,262	$527,006,000	—	30 Sep 2018	13F
VANGUARD GROUP INC	13F	Company	7.2%	3,553,528	$446,074,000	—	30 Sep 2018	13F
FRANKLIN RESOURCES INC	13F	Company	4.4%	2,184,008	$274,166,000	—	30 Sep 2018	13F
FMR LLC	13F	Company	2.8%	1,388,348	$174,279,000	—	30 Sep 2018	13F
WASATCH ADVISORS LP	13F	Company	2.4%	1,177,500	$147,812,000	—	30 Sep 2018	13F
WELLS FARGO & COMPANY/MN	13F	Company	2.3%	1,123,942	$141,088,000	—	30 Sep 2018	13F
STATE STREET CORP	13F	Company	2.2%	1,090,180	$136,852,000	—	30 Sep 2018	13F
FRONTIER CAPITAL MANAGEMENT CO LLC	13F	Company	2.1%	1,025,467	$128,727,000	—	30 Sep 2018	13F
WELLINGTON MANAGEMENT GROUP LLP	13F	Company	2%	1,007,102	$126,421,000	—	30 Sep 2018	13F
EARNEST PARTNERS LLC	13F	Company	1.7%	820,371	$102,981,000	—	30 Sep 2018	13F
JPMORGAN CHASE & CO	13F	Company	1.5%	746,614	$93,723,000	—	30 Sep 2018	13F
CONGRESS ASSET MANAGEMENT CO	13F	Company	1.5%	743,518	$93,334,000	—	30 Sep 2018	13F
BANK OF AMERICA CORP /DE/	13F	Company	1.5%	730,026	$91,641,000	—	30 Sep 2018	13F
Invesco Ltd.	13F	Company	1.5%	724,458	$90,941,000	—	30 Sep 2018	13F
AMERIPRISE FINANCIAL INC	13F	Company	1.5%	719,799	$90,359,000	—	30 Sep 2018	13F
ZEVENBERGEN CAPITAL INVESTMENTS LLC	13F	Company	1.4%	692,184	$86,890,000	—	30 Sep 2018	13F
ALLIANCEBERNSTEIN L.P.	13F	Company	1.4%	679,666	$85,318,000	—	30 Sep 2018	13F
Robeco Schweiz AG	13F	Company	1.3%	649,000	$81,975,000	—	30 Sep 2018	13F
OppenheimerFunds, Inc.	13F	Company	1.2%	604,878	$75,931,000	—	30 Sep 2018	13F
TimesSquare Capital Management, LLC	13F	Company	1.2%	592,400	$74,364,000	—	30 Sep 2018	13F
Clearbridge Investments, LLC	13F	Company	1.2%	568,054	$71,308,000	—	30 Sep 2018	13F
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	1.1%	563,249	$70,705,000	—	30 Sep 2018	13F
Bank of New York Mellon Corp	13F	Company	0.97%	475,117	$59,641,000	—	30 Sep 2018	13F
WADDELL & REED FINANCIAL INC	13F	Company	0.88%	433,650	$54,436,000	—	30 Sep 2018	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	0.82%	403,259	$50,620,000	—	30 Sep 2018	13F
VICTORY CAPITAL MANAGEMENT INC	13F	Company	0.78%	383,139	$48,095,000	—	30 Sep 2018	13F
Baird Financial Group, Inc.	13F	Company	0.76%	374,905	$46,649,000	—	30 Sep 2018	13F
NORGES BANK	13F	Company	0.75%	366,363	$45,990,000	—	30 Sep 2018	13F
BROWN ADVISORY INC	13F	Company	0.71%	347,982	$43,683,000	—	30 Sep 2018	13F
NEW YORK STATE COMMON RETIREMENT FUND	13F	Company	0.69%	337,020	$42,306,000	—	30 Sep 2018	13F
Artisan Partners Limited Partnership	13F	Company	0.67%	327,377	$41,096,000	—	30 Sep 2018	13F
NORTHERN TRUST CORP	13F	Company	0.65%	320,704	$40,259,000	—	30 Sep 2018	13F
Whale Rock Capital Management LLC	13F	Company	0.65%	317,073	$39,802,000	—	30 Sep 2018	13F
Polar Capital LLP	13F	Company	0.58%	285,778	$35,874,000	—	30 Sep 2018	13F
Ardevora Asset Management LLP	13F	Company	0.56%	275,980	$34,644,000	—	30 Sep 2018	13F
FIRST TRUST ADVISORS LP	13F	Company	0.56%	275,712	$34,610,000	—	30 Sep 2018	13F
JANUS HENDERSON GROUP PLC	13F	Company	0.54%	267,108	$33,530,000	—	30 Sep 2018	13F
Neuberger Berman Group LLC	13F	Company	0.54%	265,140	$33,283,000	—	30 Sep 2018	13F
JENNISON ASSOCIATES LLC	13F	Company	0.54%	263,476	$33,074,000	—	30 Sep 2018	13F
PRICE T ROWE ASSOCIATES INC /MD/	13F	Company	0.52%	256,960	$32,256,000	—	30 Sep 2018	13F
THRIVENT FINANCIAL FOR LUTHERANS	13F	Company	0.52%	254,864	$31,993,000	—	30 Sep 2018	13F
LORD, ABBETT & CO. LLC	13F	Company	0.49%	242,970	$30,500,000	—	30 Sep 2018	13F
DIMENSIONAL FUND ADVISORS LP	13F	Company	0.48%	236,975	$29,748,000	—	30 Sep 2018	13F
MACQUARIE GROUP LTD	13F	Company	0.47%	231,270	$29,031,000	—	30 Sep 2018	13F
LOOMIS SAYLES & CO L P	13F	Company	0.46%	228,233	$28,650,000	—	30 Sep 2018	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.46%	228,177	$28,644,000	—	30 Sep 2018	13F
TEACHERS ADVISORS, LLC	13F	Company	0.41%	201,614	$25,309,000	—	30 Sep 2018	13F
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO	13F	Company	0.4%	195,870	$24,588,000	—	30 Sep 2018	13F
TIAA CREF INVESTMENT MANAGEMENT LLC	13F	Company	0.38%	186,603	$23,424,000	—	30 Sep 2018	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.36%	176,636	$22,173,000	—	30 Sep 2018	13F

Institutional Holders of MONOLITHIC POWER SYSTEMS INC - Common Stock (MPWR) as of Q4 2018

As of 31 Dec 2018, MONOLITHIC POWER SYSTEMS INC - Common Stock (MPWR) was held by 334 institutional shareholders that filed Form 13F with the SEC. Together, they reported ownership of 42,451,324 shares. The largest 10 holders included BlackRock Inc., Vanguard Group Inc, FRANKLIN RESOURCES INC, WELLINGTON MANAGEMENT GROUP LLP, FMR LLC, WASATCH ADVISORS INC, WELLS FARGO & COMPANY/MN, WADDELL & REED FINANCIAL INC, STATE STREET CORP, and FRONTIER CAPITAL MANAGEMENT CO LLC. This page lists 334 institutional shareholders reporting positions in this security for the Q4 2018 filing period.

Investor	Option	Weight %	Change %	Value $	* Price	Shares	Share Change	Activity	Report Period

Compare Q4 2018 vs Q3 2018 Across Filers

Q3 2018 holders

350

Q4 2018 holders

334

Holder diff

-16

Investor	Q3 2018 Shares	Q4 2018 Shares	Share Diff	Share Chg %	Q3 2018 Value $	Q4 2018 Value $	Value Diff $	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.