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Disclosery

MPTI M-TRON INDS INC

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COMMON STOCK (common), issuer CIK 1902314

94 managers (97 13F filers) reported a position in MPTI shares at 2026-03-31, 2,071,895 shares in all. 18 filers opened a position and 9 filers sold out during the quarter.

Managers
94
13F filers
97
New
18
Added
29
Reduced
25
Sold out
9
Shares held by filers
2,071,895

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
GAMCO INVESTORS, INC. ET ALin group GAMCO Investors (Gabelli)168,400$11.3M0.11%-5,86013F-HRTimelineGroup
VANGUARD GROUP INCgroup of 4 filers holding160,189$10.7MnewTimeline
BlackRock, Inc.in group BlackRock, Inc.141,748$9.48M<0.01%+6,37013F-HRTimelineGroup
NEXT CENTURY GROWTH INVESTORS LLC108,220$7.23M0.52%-1,66413F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC96,789$6.47M0.01%+36,23013F-HRTimeline
BARD ASSOCIATES INC85,518$5.72M1.43%-61113F-HRTimeline
Palisades Investment Partners, LLC81,027$5.42M2.12%+14,27613F-HRTimeline
Archon Capital Management LLC78,233$5.23M2.95%-40,00013F-HRTimeline
NOMURA HOLDINGS INCin group NOMURA ASSET MANAGEMENT CO LTD72,516$4.85M0.04%new13F-HRTimelineGroup
Aristides Capital LLC65,673$4.39M1.45%+11,61913F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC63,931$4.27M<0.01%+7,07713F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP62,463$4.18M<0.01%+40,91713F-HRTimelineGroup
HERALD INVESTMENT MANAGEMENT Ltd55,000$3.69M0.51%-12,00013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP51,593$3.45M<0.01%+35,99913F-HRTimelineGroup
Grandeur Peak Global Advisors, LLC50,848$3.4M0.8%+6,78713F-HRTimeline
ADVISORY RESEARCH INC50,543$3.38M0.42%+14,94413F-HRTimeline
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP44,988$3.01M<0.01%+2,54013F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP44,283$2.96M<0.01%+8,58013F-HRTimelineGroup
CONGRUENCE CAPITAL, LLC42,256$2.82M0.95%new13F-HRTimeline
Cable Car Capital, LP40,000$2.67M0.92%new13F-HRTimeline
Potrero Capital Research LLC31,801$2.13M1.3%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND31,660$2.12M<0.01%013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP28,433$1.9M<0.01%+2,80713F-HRTimelineGroup
Illumine Investment Management, LLC24,093$1.61M1.24%-53513F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC22,755$1.52M<0.01%+10,21613F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS22,428$1.5M<0.01%-29613F-HRTimelineGroup
ExodusPoint Capital Management, LP21,882$1.46M0.01%new13F-HRTimeline
MCINTYRE FREEDMAN & FLYNN INVESTMENT AD…21,500$1.44M0.81%-50013F-HRTimeline
UBS Group AGin group UBS Group AG21,316$1.42M<0.01%+11,61913F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC20,131$1.35M<0.01%-24513F-HR/ATimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO18,398$1.23M<0.01%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY17,119$1.14M<0.01%-2,10913F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC14,549$973K<0.01%+10,05113F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…14,294$956K<0.01%+14,08213F-HRTimelineGroup
Janney Montgomery Scott LLC12,329$824K<0.01%-45013F-HRTimeline
Apis Capital Advisors, LLC12,000$802K0.12%new13F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…11,906$796K<0.01%new13F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp11,074$740K<0.01%+50913F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd10,631$711K0.01%new13F-HRTimelineGroup
Nuveen, LLCin group TIAA10,077$674K<0.01%new13F-HRTimelineGroup
Concorde Asset Management, LLC9,963$666K0.33%-10,02313F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP9,939$664K<0.01%+1,69513F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co8,658$579K<0.01%-11013F-HRTimelineGroup
ROYCE & ASSOCIATES LP8,324$556K0.01%new13F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC7,749$518K<0.01%-9413F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC7,307$488K<0.01%+2,86213F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC6,934$464K0.01%013F-HRTimeline
Marex Group Ltdin group Marex Group Ltd5,932$397K<0.01%new13F-HRTimelineGroup
CORSAIR CAPITAL MANAGEMENT, L.P.5,735$383K0.06%013F-HRTimeline
HRT FINANCIAL LP5,701$381K<0.01%new13F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.5,416$362K<0.01%new13F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/5,343$357K<0.01%+1,64413F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC5,125$343K<0.01%+3,52013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC5,086$340K<0.01%-16713F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD3,200$214K<0.01%013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC3,114$208K<0.01%-1,99413F-HRTimelineGroup
RHUMBLINE ADVISERS3,071$205K<0.01%+3613F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.2,527$169K<0.01%-15,09613F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA2,517$168K<0.01%-35813F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC2,210$147K<0.01%new13F-HRTimelineGroup
UMB Bank, n.a.2,133$143K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\1,709$114K<0.01%013F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…1,591$106K<0.01%new13F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN1,290$86.2K<0.01%-1,55713F-HR/ATimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…1,283$85.8K<0.01%+15613F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO1,123$74.3K<0.01%-7,37913F-HR/ATimelineGroup
Truvestments Capital LLC968$64.7K0.01%-21313F-HRTimeline
CALDWELL SUTTER CAPITAL, INC.724$48.4K0.02%013F-HRTimeline
Police & Firemen's Retirement System of…687$45.9K<0.01%013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC577$38.6K<0.01%-3,25313F-HRTimelineGroup
State of Alaska, Department of Revenue503$33K<0.01%013F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…460$30.8K<0.01%+24313F-HRTimelineGroup
BFSG, LLC300$20.1K<0.01%013F-HRTimeline
Sound Income Strategies, LLC250$18K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…251$16.8K<0.01%013F-HRTimelineGroup
IFP Advisors, Inc235$15.7K<0.01%+1413F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc222$14.8K<0.01%-3113F-HRTimelineGroup
CWM, LLCin group CWM, LLC211$14.1K<0.01%+313F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…150$10K<0.01%-113F-HRTimeline
CITIGROUP INCin group CITIGROUP INC143$9.56K<0.01%+7613F-HRTimelineGroup
MCF Advisors LLC140$9.36K<0.01%013F-HRTimeline
Sunbelt Securities, Inc.120$8.02K<0.01%013F-HRTimeline
FMR LLCin group FMR LLC91$6.08K<0.01%+1413F-HRTimelineGroup
WealthCollab, LLC81$5.42K<0.01%013F-HRTimeline
Farther Finance Advisors, LLC70$5.05K<0.01%013F-HRTimeline
GAMMA Investing LLC67$4.48K<0.01%+3213F-HRTimeline
SBI Securities Co., Ltd.18$1.2K<0.01%-113F-HRTimeline
True Wealth Design, LLC17$1.14K<0.01%013F-HRTimeline
Sterling Capital Management LLC16$1.07K<0.01%013F-HRTimeline
Allworth Financial LP9$602<0.01%013F-HRTimeline
Essential Partners LLC7$468<0.01%013F-HRTimeline
Advisory Services Network, LLC2$134<0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1$67<0.01%013F-HRTimelineGroup
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…1$67<0.01%013F-HR/ATimelineGroup