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Gabelli group updates M-tron (MPTI) ownership stake to 5.76%

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

M-tron Industries, Inc. received an updated ownership report from a group of investors associated with Mario Gabelli. The group reports beneficial ownership of 205,361 shares of common stock, representing 5.76% of the 3,565,118 shares outstanding as reported in the most recent Form 10-Q.

The filing attributes 168,400 shares (4.72%) to GGCP, Inc. and 36,961 shares (1.04%) to Mario Gabelli. GAMCO Investors, Inc. and Associated Capital Group, Inc. now report zero beneficial ownership. The amendment explains that the lower ownership percentage results from an increase in M-tron’s shares outstanding on March 26, 2026, rather than a major position exit.

Positive

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Negative

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55380K109

(CUSIP Number)
DAVID GOLDMAN
191 MASON STREET,
GREENWICH, CT, 06830
914-921-5000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
03/26/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




schemaVersion:


SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


GAMCO INVESTORS, INC. ET AL
Signature:PETER D. GOLDSTEIN
Name/Title:CHIEF LEGAL OFFICER
Date:03/27/2026
GGCP, INC.
Signature:DAVID GOLDMAN
Name/Title:ATTORNEY-IN-FACT
Date:03/27/2026
Associated Capital Group, Inc.
Signature:PETER D. GOLDSTEIN
Name/Title:CHIEF LEGAL OFFICER
Date:03/27/2026
GABELLI MARIO J
Signature:DAVID GOLDMAN
Name/Title:ATTORNEY-IN-FACT
Date:03/27/2026

FAQ

What ownership stake in MPTI does the Gabelli group currently report?

The Gabelli-affiliated group reports owning 205,361 MPTI shares, or 5.76% of the company. This percentage is based on 3,565,118 shares outstanding from M-tron’s latest Form 10-Q and reflects an updated calculation of their position.

How is the MPTI ownership split between GGCP and Mario Gabelli?

GGCP, Inc. reports 168,400 shares (4.72%), while Mario Gabelli reports 36,961 shares (1.04%). Together these holdings total 205,361 shares of M-tron Industries common stock reported as beneficially owned by the filing group.

Why did the reported ownership percentage in MPTI decrease in this Schedule 13D/A?

The decrease in percentage is attributed to an increase in M-tron’s shares outstanding. The amendment states the change results from additional shares reported outstanding on March 26, 2026, rather than a substantial reduction in the group’s absolute share count.

What recent MPTI trading activity is disclosed for Gabelli-affiliated entities?

The filing lists multiple sales of MPTI shares between January 27 and March 4, 2026. Transactions by Gabelli Foundation, GGCP, Inc. and Mario J. Gabelli occurred at prices ranging from 61.7600 to 67.4822 per share.

Why did the reporting persons use a long-form Schedule 13D for MPTI?

The group chose the long-form Schedule 13D to support regular communications with M-tron’s management. They state this approach helps ensure such conversations remain compliant with their reporting obligations under the Securities Exchange Act of 1934.
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