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 Q3 2019?

343 institutional investors reported MPWR - MONOLITHIC POWER SYSTEMS INC - Common Stock for Q3 2019. Use the holders table for investor-level position and value details.

MONOLITHIC POWER SYSTEMS INC - Common Stock (MPWR)

CUSIP: 609839105

Q3 2019 13F Holders as of 30 Sep 2019

Type / Class: Equity / Common Stock
Shares outstanding: 49,129,186
Total 13F shares: 42,351,592
Share change: +296,935
Total reported value: $6,591,532,706
Put/Call ratio: 175%
Price per share: $155.63
Number of holders: 343
Value change: +$52,861,063
Number of buys: 165
Number of sells: 169

Security key

609839105

Report period

Q3 2019

Institutions

343

Top holders

MPWR full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2019 Previous quarter: Q2 2019 MONOLITHIC POWER SYSTEMS INC SEC filings MONOLITHIC POWER SYSTEMS INC company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 609839105

Newer quarter: Q4 2019 Previous quarter: Q2 2019

Recent filing periods:

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

Ownership snapshot

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. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Lead holder

BlackRock Finance, Inc.

13D/G signal

—

Evidence rows

Latest as of

30 Jun 2019

13F Lead comparable stake: 9% Showing first 8 of 50 holder rows. Open remaining rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
BlackRock Finance, Inc.	13F Company 13F	9%	$598,366,000 4,406,881 shares	—	30 Jun 2019
VANGUARD GROUP INC	13F Company 13F	7.5%	$500,094,000 3,683,123 shares	—	30 Jun 2019
FRANKLIN RESOURCES INC	13F Company 13F	4.4%	$296,701,000 2,185,309 shares	—	30 Jun 2019
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	3.2%	$214,887,000 1,582,613 shares	—	30 Jun 2019
WELLS FARGO & COMPANY/MN	13F Company 13F	2.8%	$188,016,000 1,384,712 shares	—	30 Jun 2019
WADDELL & REED FINANCIAL INC	13F Company 13F	2.4%	$161,128,000 1,186,682 shares	—	30 Jun 2019
Invesco Ltd.	13F Company 13F	2.4%	$160,615,000 1,182,914 shares	—	30 Jun 2019
WASATCH ADVISORS LP	13F Company 13F	2.3%	$156,157,000 1,150,071 shares	—	30 Jun 2019

Show 42 additional holder rows in the full holder list

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
STATE STREET CORP	13F Company 13F	2.1%	$143,318,000 1,052,453 shares	—	30 Jun 2019
JPMORGAN CHASE & CO	13F Company 13F	2%	$129,160,000 972,454 shares	—	30 Jun 2019
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F Company 13F	1.8%	$119,739,000 881,860 shares	—	30 Jun 2019
Clearbridge Investments, LLC	13F Company 13F	1.8%	$117,682,000 866,714 shares	—	30 Jun 2019
EARNEST PARTNERS LLC	13F Company 13F	1.6%	$110,059,000 810,566 shares	—	30 Jun 2019
VICTORY CAPITAL MANAGEMENT INC	13F Company 13F	1.6%	$106,795,000 786,534 shares	—	30 Jun 2019
PRICE T ROWE ASSOCIATES INC /MD/	13F Company 13F	1.5%	$97,610,000 718,884 shares	—	30 Jun 2019
FRONTIER CAPITAL MANAGEMENT CO LLC	13F Company 13F	1.4%	$96,612,000 711,531 shares	—	30 Jun 2019
CONGRESS ASSET MANAGEMENT CO	13F Company 13F	1.4%	$94,581,000 696,578 shares	—	30 Jun 2019
BANK OF AMERICA CORP /DE/	13F Company 13F	1.4%	$93,430,000 688,092 shares	—	30 Jun 2019
FMR LLC	13F Company 13F	1.3%	$83,463,000 614,692 shares	—	30 Jun 2019
ALLIANCEBERNSTEIN L.P.	13F Company 13F	1.2%	$79,559,000 585,941 shares	—	30 Jun 2019
TimesSquare Capital Management, LLC	13F Company 13F	1.1%	$71,821,000 528,950 shares	—	30 Jun 2019
Nuveen Asset Management, LLC	13F Company 13F	1.1%	$70,815,000 521,543 shares	—	30 Jun 2019
Bank of New York Mellon Corp	13F Company 13F	0.99%	$66,356,000 488,697 shares	—	30 Jun 2019
Baird Financial Group, Inc.	13F Company 13F	0.99%	$65,799,000 484,600 shares	—	30 Jun 2019
GEODE CAPITAL MANAGEMENT, LLC	13F Company 13F	0.95%	$63,389,000 466,856 shares	—	30 Jun 2019
BROWN ADVISORY INC	13F Company 13F	0.94%	$62,745,000 462,107 shares	—	30 Jun 2019
NORGES BANK	13F Company 13F	0.84%	$56,052,000 412,813 shares	—	30 Jun 2019
Whale Rock Capital Management LLC	13F Company 13F	0.81%	$54,273,000 399,714 shares	—	30 Jun 2019
THRIVENT FINANCIAL FOR LUTHERANS	13F Company 13F	0.8%	$53,665,000 395,238 shares	—	30 Jun 2019
Artisan Partners Limited Partnership	13F Company 13F	0.76%	$50,567,000 372,420 shares	—	30 Jun 2019
ZEVENBERGEN CAPITAL INVESTMENTS LLC	13F Company 13F	0.75%	$49,698,000 366,015 shares	—	30 Jun 2019
NEW YORK STATE COMMON RETIREMENT FUND	13F Company 13F	0.69%	$46,202,000 340,270 shares	—	30 Jun 2019
Ardevora Asset Management LLP	13F Company 13F	0.68%	$45,321,000 333,780 shares	—	30 Jun 2019
NORTHERN TRUST CORP	13F Company 13F	0.68%	$45,153,000 332,551 shares	—	30 Jun 2019
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	13F Company 13F	0.65%	$43,518,440 320,507 shares	—	30 Jun 2019
Polar Capital LLP	13F Company 13F	0.6%	$39,932,000 294,093 shares	—	30 Jun 2019
JENNISON ASSOCIATES LLC	13F Company 13F	0.55%	$36,990,000 272,425 shares	—	30 Jun 2019
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F Company 13F	0.53%	$35,602,000 262,199 shares	—	30 Jun 2019
JANUS HENDERSON GROUP PLC	13F Company 13F	0.53%	$35,482,000 261,320 shares	—	30 Jun 2019
FIRST TRUST ADVISORS LP	13F Company 13F	0.5%	$33,207,000 244,565 shares	—	30 Jun 2019
MACQUARIE GROUP LTD	13F Company 13F	0.49%	$32,981,000 242,900 shares	—	30 Jun 2019
AMERIPRISE FINANCIAL INC	13F Company 13F	0.49%	$32,389,000 238,499 shares	—	30 Jun 2019
Allianz Asset Management GmbH	13F Company 13F	0.48%	$31,724,000 233,644 shares	—	30 Jun 2019
LOOMIS SAYLES & CO L P	13F Company 13F	0.47%	$31,522,000 232,154 shares	—	30 Jun 2019
AMUNDI ASSET MANAGEMENT US, INC.	13F Company 13F	0.46%	$30,898,000 227,566 shares	—	30 Jun 2019
Neuberger Berman Group LLC	13F Company 13F	0.45%	$30,339,000 223,444 shares	—	30 Jun 2019
DIMENSIONAL FUND ADVISORS LP	13F Company 13F	0.39%	$25,860,000 190,476 shares	—	30 Jun 2019
PRINCIPAL FINANCIAL GROUP INC	13F Company 13F	0.35%	$23,505,000 173,108 shares	—	30 Jun 2019
GOLDMAN SACHS GROUP INC	13F Company 13F	0.35%	$23,050,000 169,760 shares	—	30 Jun 2019
Ceredex Value Advisors LLC	13F Company 13F	0.34%	$22,645,000 166,290 shares	—	30 Jun 2019

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 2019

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

343

42,351,592

Rows loaded

343

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. An asterisk next to the price means the price is likely invalid.

Compare Q3 2019 vs Q2 2019 Across Filers

Q2 2019 holders

339

Q3 2019 holders

343

Holder diff

Investor	Q2 2019 Shares	Q3 2019 Shares	Share Diff	Share Chg %	Q2 2019 value	Q3 2019 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend