DOSSIER · 13F Holders · Q2 2026
MPTI

M-TRON INDS INC

117 institutions still hold M-TRON INDS INC as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 55380K109·117 13F holders·last filed Jun 30, 2026
Market cap
13F value held
$187M
visible holders
Holders
117
filers reporting
Concentration
13.41%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

117 institutions reported MPTI in Q2 2026. BlackRock, Inc. leads at 13.4% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$25M253K0.00%Q2 2026
02
GAMCO INVESTORS, INC. ET AL
CIK 0000807249
$20M201K0.18%Q2 2026
03
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$17M173K0.00%Q2 2026
04
ROYCE & ASSOCIATES LP
CIK 0000906304
$16M157K0.13%Q2 2026
05
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$13M132K0.01%Q2 2026
06
NEXT CENTURY GROWTH INVESTORS LLC
CIK 0001134007
$12M124K0.65%Q2 2026
07
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$10M101K0.00%Q2 2026
08
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
$10M96K0.01%Q2 2026
09
STATE STREET CORP
CIK 0000093751
$8M82K0.00%Q2 2026
10
Palisades Investment Partners, LLC
CIK 0001427373
$8M82K2.32%Q2 2026
11
Congruence Capital, LLC
CIK 0002085569
$7M67K1.73%Q2 2026
12
ADVISORY RESEARCH INC
CIK 0000902584
$6M59K0.58%Q2 2026
13
Herald Investment Management Ltd
CIK 0001512022
$6M59K0.79%Q2 2026
14
Grandeur Peak Global Advisors, LLC
CIK 0001569137
$6M57K1.30%Q2 2026
15
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$5M48K0.00%Q2 2026
16
BARD ASSOCIATES INC
CIK 0001105907
$4M45K0.98%Q2 2026
17
Aristides Capital LLC
CIK 0001595521
$4M41K0.79%Q2 2026
18
NORTHERN TRUST CORP
CIK 0000073124· Index
$4M40K0.00%Q2 2026
19
Potrero Capital Research LLC
CIK 0001536630
$4M38K2.10%Q2 2026
20
NEW YORK STATE COMMON RETIREMENT FUND
CIK 0000810265
$3M32K0.00%Q2 2026
Page 1 of 6
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Insiders at M-TRON INDS INC
Biles Linda MPforr CameronSusanto HendiDrafts William ArnoldArteaga IvanLazar BelMega John SLapenta Robert V Jr