M-TRON INDUSTRIES INC (MPTI) Institutional Shareholders
M-TRON INDUSTRIES INC (MPTI) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $140.52M in MPTI holdings during the latest filing period.
Gamco Investors, Inc. Et Al is currently the largest disclosed institutional shareholder of MPTI tracked by InsiderSet, reporting ownership valued at approximately $11.26M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $13.87M, representing an estimated gain of +23.23% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 49% of the total disclosed MPTI value among the investors covered in this analysis. Major shareholders include Gamco Investors, Inc. Et Al, Blackrock, Inc., Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in M-TRON INDUSTRIES INC (MPTI).
This page ranks the largest institutional MPTI shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
97
Total Reported Value
$140.52M
Largest Holder
Gamco Investors, Inc. Et Al
Largest Position
$11.26M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
109
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Gamco Investors, Inc. Et Al | 0.11% | 168,400 | $11,257,540 | $13,872,792 | +$2,615,252 | +23.23% | |
| Blackrock, Inc. | 0.00% | 141,748 | $9,475,855 | $11,677,200 | +$2,201,345 | +23.23% | |
| Vanguard Capital Management Llc | 0.00% | 116,768 | $7,805,941 | $9,619,348 | +$1,813,407 | +23.23% | |
| Next Century Growth Investors Llc | 0.52% | 108,220 | $7,234,507 | $8,915,164 | +$1,680,657 | +23.23% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 96,789 | $6,470,345 | $7,973,478 | +$1,503,133 | +23.23% |
| Herald Investment Management Ltd | 0.79% | 58,500 | $5,789,745 | $4,819,230 | -$970,515 | -16.76% | |
| Bard Associates Inc | 1.43% | 85,518 | $5,716,879 | $7,044,973 | +$1,328,094 | +23.23% | |
| Palisades Investment Partners, Llc | 2.12% | 81,027 | $5,416,655 | $6,675,004 | +$1,258,349 | +23.23% | |
| Archon Capital Management Llc | 2.95% | 78,233 | $5,229,876 | $6,444,835 | +$1,214,959 | +23.23% | |
| Nomura Holdings Inc | 0.04% | 72,516 | $4,847,695 | $5,973,868 | +$1,126,173 | +23.23% | |
| Aristides Capital Llc | 1.45% | 65,673 | $4,390,240 | $5,410,142 | +$1,019,902 | +23.23% | |
| Geode Capital Management, Llc | 0.00% | 63,931 | $4,274,806 | $5,266,636 | +$991,830 | +23.20% | |
| Two Sigma Investments, Lp | 0.00% | 62,463 | $4,175,652 | $5,145,702 | +$970,050 | +23.23% | |
| Marshall Wace, Llp | 0.00% | 51,593 | $3,448,992 | $4,250,231 | +$801,239 | +23.23% | |
| Grandeur Peak Global Advisors, Llc | 0.80% | 50,848 | $3,399,189 | $4,188,858 | +$789,669 | +23.23% | |
| Advisory Research Inc | 0.42% | 50,543 | $3,378,800 | $4,163,732 | +$784,932 | +23.23% | |
| New York State Common Retirement Fund | 0.00% | 31,660 | $3,139,089 | $2,608,151 | -$530,938 | -16.91% | |
| Dimensional Fund Advisors Lp | 0.00% | 44,988 | $3,007,133 | $3,706,111 | +$698,978 | +23.24% | |
| State Street Corp | 0.00% | 44,283 | $2,960,319 | $3,648,034 | +$687,715 | +23.23% | |
| Congruence Capital, Llc | 0.95% | 42,256 | $2,824,814 | $3,481,049 | +$656,235 | +23.23% | |
| Cable Car Capital, Lp | 0.92% | 40,000 | $2,674,000 | $3,295,200 | +$621,200 | +23.23% | |
| Illumine Investment Management, Llc | 1.60% | 0 | $2,460,209 | — | — | — | |
| Potrero Capital Research Llc | 1.30% | 31,801 | $2,125,897 | $2,619,766 | +$493,869 | +23.23% | |
| Northern Trust Corp | 0.00% | 28,433 | $1,900,746 | $2,342,311 | +$441,565 | +23.23% | |
| Citadel Advisors Llc | 0.00% | 22,755 | $1,521,172 | $1,874,557 | +$353,385 | +23.23% | |
| Bnp Paribas Financial Markets | 0.00% | 22,428 | $1,499,312 | $1,847,619 | +$348,307 | +23.23% | |
| Exoduspoint Capital Management, Lp | 0.01% | 21,882 | $1,462,812 | $1,802,639 | +$339,827 | +23.23% | |
| Vanguard Fiduciary Trust Co | 0.00% | 21,597 | $1,443,759 | $1,779,161 | +$335,402 | +23.23% | |
| Ubs Group Ag | 0.00% | 21,316 | $1,424,974 | $1,756,012 | +$331,038 | +23.23% | |
| Ameriprise Financial Inc | 0.00% | 20,131 | $1,345,758 | $1,658,392 | +$312,634 | +23.23% | |
| Vanguard Portfolio Management Llc | 0.00% | 19,807 | $1,324,098 | $1,631,701 | +$307,603 | +23.23% | |
| Sei Investments Co | 0.00% | 18,398 | $1,229,906 | $1,515,627 | +$285,721 | +23.23% | |
| Morgan Stanley | 0.00% | 17,119 | $1,144,406 | $1,410,263 | +$265,857 | +23.23% | |
| Q Fund Management (Hong Kong) Ltd | 0.91% | 10,000 | $991,500 | $823,800 | -$167,700 | -16.91% | |
| Jane Street Group, Llc | 0.00% | 14,549 | $972,600 | $1,198,547 | +$225,947 | +23.23% | |
| Russell Investments Group, Ltd. | 0.00% | 14,294 | $955,564 | $1,177,540 | +$221,976 | +23.23% | |
| Apis Capital Advisors, Llc | 0.12% | 12,000 | $802,200 | $988,560 | +$186,360 | +23.23% | |
| Susquehanna International Group, Llp | 0.00% | 11,906 | $795,916 | $980,816 | +$184,900 | +23.23% | |
| Bank Of New York Mellon Corp | 0.00% | 11,074 | $740,320 | $912,276 | +$171,956 | +23.23% | |
| Xtx Topco Ltd | 0.01% | 10,631 | $710,682 | $875,782 | +$165,100 | +23.23% | |
| Nuveen, Llc | 0.00% | 10,077 | $673,647 | $830,143 | +$156,496 | +23.23% | |
| First Trust Advisors Lp | 0.00% | 9,939 | $664,422 | $818,775 | +$154,353 | +23.23% | |
| Charles Schwab Investment Management Inc | 0.00% | 8,658 | $578,787 | $713,246 | +$134,459 | +23.23% | |
| Royce & Associates Lp | 0.01% | 8,324 | $556,459 | $685,731 | +$129,272 | +23.23% | |
| American Century Companies Inc | 0.00% | 7,749 | $518,021 | $638,363 | +$120,342 | +23.23% | |
| Millennium Management Llc | 0.00% | 7,307 | $488,473 | $601,951 | +$113,478 | +23.23% | |
| Bridgeway Capital Management, Llc | 0.01% | 6,934 | $463,538 | $571,223 | +$107,685 | +23.23% | |
| Marex Group Plc | 0.00% | 5,932 | $396,554 | $488,678 | +$92,124 | +23.23% | |
| Corsair Capital Management, L.P. | 0.06% | 5,735 | $383,385 | $472,449 | +$89,064 | +23.23% | |
| D. E. Shaw & Co., Inc. | 0.00% | 5,416 | $362,060 | $446,170 | +$84,110 | +23.23% |
Frequently asked questions about MPTI
Who owns the most MPTI stock?
The largest holders of MPTI are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for M-TRON INDUSTRIES INC (MPTI).
Is MPTI widely held by superinvestors?
Many widely followed stocks like MPTI appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly MPTI is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.