Monolithic Power Systems, Inc.: which funds bought and sold

Institutions that bought and sold Monolithic Power Systems shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 620 institutions that filed 13F reports for both quarters added to or opened positions in Monolithic Power Systems, and 534 cut or closed them. Together they sold a net 386K shares, −0.8% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 105K shares (+0.9%); index fund managers were net sellers of 472K shares (−2.8%). 200 opened a new position and 76 sold out entirely.

Bought, Q2 2026 620 institutions, 200 of them new holders Sold, Q2 2026 534 institutions, 76 of them sold out

Net change, all compared −386K shares (−0.8%)

Net change, active managers +105K shares (+0.9%), 52 bought, 39 sold

Buyers versus sellers

institutions compared, 1,297

620 bought 143 534 sold

Active managers and hedge funds 52 bought · 39 sold · +105K

Index fund managers 6 bought · 6 sold · −472K

Other institutions 562 bought · 489 sold · −18K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+776K +17.6%	5.2M	$7.2B
Van Eck Associates Corp	+222K +42.3%	746K	$1B
Goldman Sachs Group Inc	+213K +37.4%	781K	$1.1B
Two Sigma Investments, LP Hedge fund	+178K +1485.2%	191K	$263M
Jane Street Group, LLC	+174K +3427.3%	179K	$248M
Bank Of America Corp	+154K +40.3%	536K	$741M
Rafferty Asset Management, LLC Index funds	+142K +44.7%	459K	$635M
Millennium Management LLC Hedge fund	+137K New position	137K	$189M
Jennison Associates LLC Active manager	+136K +275.6%	186K	$256M
Federated Hermes, Inc. Active manager	+96K +198.5%	145K	$200M
Canada Pension Plan Investment Board	+95K +178.9%	149K	$206M
Susquehanna International Group, LLP	+94K +313.1%	124K	$171M
State Street Corp Index funds	+94K +4.3%	2.3M	$3.2B
D1 Capital Partners L.P. Hedge fund	+85K New position	85K	$118M
HRT Financial LP	+77K New position	77K	$107M
Capitolis Liquid Global Markets LLC	+74K +1686.2%	78K	$108M
Morgan Stanley	+72K +10.9%	728K	$1B
Fil Ltd Active manager	+70K +45.2%	225K	$310M
Qube Research & Technologies Ltd Hedge fund	+65K New position	65K	$89.2M
California Public Employees Retirement System	+64K +40.2%	224K	$310M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
FMR LLC Active manager	+776K +17.6%	5.2M	$7.2B
Two Sigma Investments, LP Hedge fund	+178K +1485.2%	191K	$263M
Millennium Management LLC Hedge fund	+137K New position	137K	$189M
Jennison Associates LLC Active manager	+136K +275.6%	186K	$256M
Federated Hermes, Inc. Active manager	+96K +198.5%	145K	$200M
D1 Capital Partners L.P. Hedge fund	+85K New position	85K	$118M
Fil Ltd Active manager	+70K +45.2%	225K	$310M
Qube Research & Technologies Ltd Hedge fund	+65K New position	65K	$89.2M
Renaissance Technologies LLC Hedge fund	+63K New position	63K	$87.2M
Alliancebernstein L.P. Active manager	+52K +42.1%	177K	$194M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
T. Rowe Price Investment Management, Inc. Active manager	−722K Sold out	0	—
Blackrock, Inc. Index funds	−483K −7.9%	5.6M	$7.7B
Price T Rowe Associates Inc Active manager	−286K −22.7%	977K	$1.4B
Geode Capital Management, LLC Index funds	−237K −16.5%	1.2M	$1.6B
Anther Capital Ltd	−233K Sold out	0	—
Brown Advisory Inc Active manager	−199K −52.5%	180K	$249M
Wellington Management Group LLP Active manager	−179K −71.3%	72K	$99.5M
Invesco Ltd.	−172K −6.8%	2.3M	$3.2B
Massachusetts Financial Services Co Active manager	−126K −22.1%	442K	$611M
Jpmorgan Chase & Co	−120K −21.6%	435K	$571M
Franklin Resources Inc Active manager	−117K −12.6%	812K	$1.1B
Nomura Asset Management Co Ltd	−115K −78.4%	32K	$43.8M
First Trust Advisors LP	−109K −18.4%	483K	$667M
UBS Group AG	−91K −16.8%	449K	$621M
Barclays PLC	−82K −14.7%	474K	$655M
Kayne Anderson Rudnick Investment Management LLC Active manager	−61K −22.7%	206K	$285M
Healthcare Of Ontario Pension Plan Trust Fund	−60K −43.8%	76K	$106M
Voya Investment Management LLC	−53K −13.5%	340K	$470M
American Century Companies Inc Active manager	−52K −26.3%	147K	$204M
Raymond James Financial Inc	−50K −25.7%	146K	$201M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
T. Rowe Price Investment Management, Inc. Active manager	−722K Sold out	0	—
Price T Rowe Associates Inc Active manager	−286K −22.7%	977K	$1.4B
Brown Advisory Inc Active manager	−199K −52.5%	180K	$249M
Wellington Management Group LLP Active manager	−179K −71.3%	72K	$99.5M
Massachusetts Financial Services Co Active manager	−126K −22.1%	442K	$611M
Franklin Resources Inc Active manager	−117K −12.6%	812K	$1.1B
Kayne Anderson Rudnick Investment Management LLC Active manager	−61K −22.7%	206K	$285M
American Century Companies Inc Active manager	−52K −26.3%	147K	$204M
Frontier Capital Management Co LLC Active manager	−47K −58.9%	33K	$45.2M
Panagora Asset Management Inc Active manager	−35K −83.2%	7,068	$9.8M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Millennium Management LLCHedge fund	137K	$189M
D1 Capital Partners L.P.Hedge fund	85K	$118M
HRT Financial LP	77K	$107M
Qube Research & Technologies LtdHedge fund	65K	$89.2M
Renaissance Technologies LLCHedge fund	63K	$87.2M
Worldquant Millennium Advisors LLCHedge fund	47K	$65.2M
Quadrature Capital LtdHedge fund	45K	$62.2M
LMR Partners LLPHedge fund	36K	$49.4M
Voloridge Investment Management, LLCHedge fund	30K	$41.4M
Capital Impact Advisors, LLC	28K	$38.4M

Sold out

largest by value

Institution	Shares	Value March 31, 2026
T. Rowe Price Investment Management, Inc.Active manager	722K	$789M
Anther Capital Ltd	233K	$255M
Sora Investors LLC	25K	$26.9M
Ceredex Value Advisors LLC	17K	$18.9M
Night Squared LP	15K	$16M
1832 Asset Management L.P.	13K	$14.7M
Silvant Capital Management LLC	13K	$14.3M
Indivisible Partners	4,378	$4.8M
Nfj Investment Group, LLC	4,375	$4.8M
Connective Capital Management, LLC	4,105	$4.5M

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 1,238
Ten largest holders: 52.1%
Index fund managers: 34.6%
Active managers and hedge funds: 23.3%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	52	39	22	5	+105K	+0.9%
Index fund managers	6	6	0	0	−472K	−2.8%
Other institutions	562	489	178	71	−18K	−0.1%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Monolithic Power Systems.

Only managers that filed a holdings report for both quarters are compared (1,297 here). 40 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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