Every Form 4 that M-tron Industries, Inc. (MPTI) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow MPTI and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full MPTI filings page.
M-tron Industries, Inc. (MPTI) reported that Executive VP - Finance Linda M. Biles sold 1,218 shares of common stock on 2026-08-11 to cover tax withholding obligations related to the vesting of a restricted stock award. The weighted average sale price was $85.05 per share, with individual trades executed between $84.62 and $85.44 under Rule 144. Following this transaction, she directly owns 28,723 common shares and holds a stock option for 10,000 shares at an exercise price of $40.32, expiring on 2030-04-04, vesting 30% on 2026-04-04, 30% on 2027-04-04, and 40% on 2028-04-04.
M-tron Industries, Inc. reported that CEO and CFO Cameron Pforr received a grant of 3,805 restricted shares of Common Stock on March 19, 2026, at no cash price, increasing direct holdings to 30,611 shares. These restricted shares vest 1,142 shares on 3/19/2027, 1,142 shares on 3/19/2028, and 1,522 shares on 3/19/2029.
The filing also lists a stock option position covering 24,560 shares of Common Stock at an exercise price of $40.32 per share, vesting 30% on 4/4/2026, 30% on 4/4/2027, and 40% on 4/4/2028, with expiration on 4/4/2030. The transactions were not reported as made under a Rule 10b5-1 trading plan.
M-tron Industries’ president, William Arnold Drafts, received a grant of 2,840 restricted common shares on March 19, 2026, at no cash cost. These shares vest in tranches through 2029. Following this award, he directly holds 16,656 common shares and stock options for 12,500 shares at a $40.3200 exercise price, vesting 30% in 2026, 30% in 2027 and 40% in 2028, expiring in 2030.
M-tron Industries, Inc. reported that Executive VP – Finance Linda M. Biles received a grant of 1,565 shares of Common Stock on March 19, 2026 at $0.00 per share, increasing her direct holdings to 29,941 shares.
The award consists of restricted shares vesting in tranches of 470 shares on March 19, 2027, 470 shares on March 19, 2028, and 625 shares on March 19, 2028. She also holds stock options covering 10,000 shares of Common Stock at an exercise price of $40.3200, expiring April 4, 2030, vesting 30% on April 4, 2026, 30% on April 4, 2027, and 40% on April 4, 2028.
M-tron Industries, Inc. President William Arnold Drafts reported a small open-market sale of company stock. He sold 361 shares of Common Stock at $66.78 per share on May 4, 2026, with the sale described as satisfying tax withholding obligations tied to the vesting of 1,214 restricted shares on April 30, 2026.
Following the sale, he directly holds 13,816 Common Stock shares and a stock option covering 12,500 underlying shares at an exercise price of $40.32 per share, expiring on April 4, 2030. The option vests in stages through April 4, 2028.
M-tron Industries, Inc. CEO and CFO Cameron Pforr reported an open-market sale of 840 shares of common stock at $66.78 per share on May 4, 2026. A footnote explains these shares were sold to satisfy tax withholding obligations tied to the vesting of 2,823 shares of restricted stock on April 30, 2026, making this a compensation-related, non-discretionary sale rather than a typical portfolio decision.
After the transaction, Pforr directly holds 26,806 shares of common stock. He also holds stock options covering 24,560 underlying shares of common stock at an exercise price of $40.32 per share, expiring on April 4, 2030. These options vest in tranches of 30% on April 4, 2026, 30% on April 4, 2027, and 40% on April 4, 2028.
M-tron Industries Executive VP of Finance Linda M. Biles reported a small tax-related share sale. On May 4, 2026, she sold 306 shares of common stock at $66.78 per share to satisfy tax withholding obligations tied to the vesting of 1,029 restricted shares on April 30, 2026. After the sale, she directly holds 28,376 common shares. She also holds a stock option covering 10,000 common shares at an exercise price of $40.32 per share, expiring on April 4, 2030, vesting 30% on April 4, 2026, 30% on April 4, 2027, and 40% on April 4, 2028.
M-tron Industries, Inc. CEO and CFO Cameron Pforr exercised stock options to acquire additional common shares. On April 28 and 29, 2026, he exercised options covering a total of 440 shares of common stock at an exercise price of $40.32 per share.
Following these exercises, he directly holds 28,186 shares of common stock and retains 24,560 stock options with a $40.32 exercise price, expiring on April 4, 2030. These are compensation-related derivative exercises rather than open-market purchases or sales.
M-tron Industries director Ivan Arteaga exercised subscription rights to acquire additional common stock. He exercised rights to receive 174 shares of common stock at an exercise price of $59.00 per share, and separately acquired 24 additional shares at $59.00 per share through the over-subscription privilege.
After these transactions, Arteaga directly owned 1,313 shares of M-tron Industries common stock. The subscription rights arose from a rights distribution in which each holder received one right per share held, with five rights permitting the purchase of one new share of common stock at $59.00 per share.
M-tron Industries, Inc. Executive VP – Finance Linda M. Biles reported sales of subscription rights tied to M-tron common stock. She sold 24,643 subscription rights on April 9, 2026 and 2,700 subscription rights on April 14, 2026, both coded as open-market sales.
These rights were issued in a rights offering where each common share received one right and five rights entitle the holder to buy one common share at an exercise price of $59.00 per share. After the reported transactions, Biles directly holds 28,682 shares of common stock and stock options over 10,000 shares with a $40.32 exercise price vesting between 2026 and 2028. This Form 4/A amends a prior filing to add the April 9 sale of rights that had been inadvertently omitted and to correct the related ending balance.
M-tron Industries, Inc. President William Arnold Drafts reported selling a total of 11,749 Subscription Rights to purchase M-tron common stock in open-market transactions. These derivative securities entitled holders, when exercisable, to buy common shares at an exercise price of $59.00 per share, with five rights needed for one share. After these transactions, he continues to hold 14,177 shares of Common Stock directly and a stock option covering 12,500 shares at an exercise price of $40.32 per share, expiring in 2030. The option vests in tranches of 30% on April 4, 2026, 30% on April 4, 2027, and 40% on April 4, 2028, indicating a continuing long-term equity position.
M-tron Industries director Marc Gabelli exercised subscription rights to acquire additional common stock. On April 20, 2026, he exercised rights to purchase 3,276 shares of Common Stock at $59.00 per share. Following the transaction, he directly holds 45,840 shares of M-tron Industries common stock.
The exercised rights came from a rights distribution in which each common share held as of March 27, 2026 received one subscription right. Five rights entitled the holder to buy one common share at $59.00, and all reported rights in this filing were fully exercised, leaving no remaining rights position.
M-tron Industries, Inc. CEO and CFO Cameron Pforr reported a mix of derivative exercises and sales involving the company’s stock. He exercised subscription rights to acquire 100 shares of common stock at $59.00 per share and reported direct ownership of 27,746 common shares afterward.
Pforr also sold 21,500 subscription rights, which were tied to 4,300 underlying common shares at an exercise price of $59.00 per share. In addition, he holds a stock option over 25,000 common shares at an exercise price of $40.32 per share, vesting 30% on April 4, 2026, 30% on April 4, 2027, and 40% on April 4, 2028, expiring on April 4, 2030.
M-tron Industries director Susanto Hendi exercised subscription rights to acquire additional common shares. On April 14 and April 20, 2026, he exercised rights to purchase a total of 1,525 shares of common stock at $59.00 per share through in-the-money derivative exercises.
These rights were distributed on March 30, 2026, with holders receiving one right for each share owned as of March 27, 2026, and five rights allowing the purchase of one new share at $59.00. Following these transactions, Hendi directly owns 9,154 shares of M-tron common stock, and his reported subscription rights position has been fully exercised.
M-tron Industries Executive VP - Finance Linda M. Biles reported net sales of 3,420 securities of the company on April 14, 2026. She sold 2,700 subscription rights to purchase common stock, which relate to 540 underlying shares at an exercise price of $59.00 per share, and 720 shares of common stock in open-market transactions.
After these sales, she directly holds 28,682 shares of common stock and 24,643 subscription rights. She also holds stock options covering 10,000 shares of common stock at an exercise price of $40.32 per share, expiring on April 4, 2030, with vesting in tranches of 30%, 30%, and 40% from 2026 through 2028.
M-tron Industries CEO and CFO Cameron Pforr received a grant of 5,646 shares of Common Stock on April 2, 2026 as a compensation award. The shares are restricted and vest in two equal installments of 2,823 shares on April 30, 2026 and April 30, 2027. After this grant, Pforr directly holds 27,646 common shares. He also holds a stock option to buy 25,000 common shares at an exercise price of $40.32 per share, expiring on April 4, 2030. These options vest 30% on April 4, 2026, 30% on April 4, 2027, and 40% on April 4, 2028.
M-tron Industries Executive VP – Finance Linda M. Biles received a grant of 2,059 shares of Common Stock on April 2, 2026, increasing her direct holdings to 29,402 shares. The award was granted at no cash cost to her, reflecting stock-based compensation rather than a market purchase.
The filing also notes prior tax withholding of 617 shares on August 11, 2025 to satisfy obligations related to the vesting of 2,700 restricted shares on August 9, 2025. In addition, she holds stock options covering 10,000 shares of Common Stock at an exercise price of $40.32 per share, expiring on April 4, 2030, with vesting scheduled in stages through 2028.
M-tron Industries, Inc. President William Arnold Drafts received an award of 2,428 shares of Common Stock as a grant, with no cash paid per share. These are restricted shares, vesting in two equal installments of 1,214 shares on April 30, 2026 and April 30, 2027.
Following the grant, he directly holds 14,177 shares of Common Stock. He also holds stock options covering 12,500 underlying shares at an exercise price of $40.3200 per share, expiring on April 4, 2030, with the options vesting 30% on April 4, 2026, 30% on April 4, 2027, and 40% on April 4, 2028.
M-tron Industries President William Arnold Drafts reported option-style warrant exercises that increased his direct common stock holdings. On December 19 and 23, 2025, he exercised Common Stock Warrants at an exercise price of $47.50 per share in in-the-money derivative exercises, acquiring a total of 741 shares of Common Stock. These transactions raised his directly held Common Stock position to 11,749 shares. The filing also notes a tiny sale of 3 Common Stock Warrants, a negligible portion of his overall exposure. Separately, he continues to hold a stock option covering 12,500 underlying shares at an exercise price of $40.32, vesting in tranches from 2026 through 2028 and expiring in 2030, which shows substantial remaining derivative-based equity exposure.
Susanto Hendi reported acquisition or exercise transactions in this Form 4 filing.
M-tron Industries director Susanto Hendi received an annual stock grant of 242 shares of Common Stock. The grant was recorded at a price of $0.00 per share, indicating it was a compensation award rather than a market purchase. Following this award, Hendi directly holds 7,629 shares of M-tron Industries Common Stock.
Mega John S reported acquisition or exercise transactions in this Form 4 filing.
M-tron Industries, Inc. director John S. Mega received an annual stock grant of 242 shares of Common Stock as a non-employee director. The shares were awarded at no cash cost per share, reflecting equity-based compensation rather than an open-market purchase. Following this grant, his directly held position increased to 5,586 Common Stock shares, giving him greater equity alignment with shareholders without signaling a discretionary buy or sell decision in the market.
LAZAR BEL reported acquisition or exercise transactions in this Form 4 filing.
M-tron Industries director Bel Lazar received an annual stock grant of 242 shares of Common Stock as a non-employee director. The shares were awarded on March 19, 2026 at a stated price of $0.00 per share, reflecting equity compensation rather than a market purchase. Following this grant, Lazar directly holds 6,845 shares of M-tron Industries common stock. This appears to be a routine equity award for board service rather than an open-market transaction.
LaPenta Robert V Jr reported acquisition or exercise transactions in this Form 4 filing.
M-tron Industries, Inc. director Robert V. LaPenta Jr. received an annual stock grant of 242 shares of common stock as compensation for his role as a non-employee director. The shares were awarded at no cash cost to him, increasing his directly held position to 4,509 shares.
Goldman David M reported acquisition or exercise transactions in this Form 4 filing.
M-tron Industries director David M. Goldman received an annual stock grant of common shares. On March 19, 2026, he was awarded 242 shares of M-tron Industries, Inc. common stock at no cash cost as director compensation. After this grant, he directly holds 2,599 common shares.
Arteaga Ivan reported acquisition or exercise transactions in this Form 4 filing.
M-tron Industries, Inc. reported that director Ivan Arteaga received an annual stock grant of 242 shares of Common Stock on March 19, 2026 as compensation for service as a non-employee director. Following this award, he directly owns a total of 1,115 Common Stock shares.
GABELLI MARC reported acquisition or exercise transactions in this Form 4 filing.
M-tron Industries director Marc Gabelli received an annual stock grant of 242 shares of Common Stock as compensation for his role as a non-employee director. The shares were granted at no cash cost, and his directly held stake increased to 42,564 shares following this award.
M-tron Industries, Inc. director Ivan Arteaga reported exercising warrants to buy additional common stock. On January 6, 2026, he acquired 35 shares of Common Stock at $47.50 per share through the exercise of 360 Common Stock Warrants, a derivative security with an exercise price of $47.50. After this transaction, he beneficially owned 873 shares of Common Stock and 4 Common Stock Warrants, all held directly. The filing explains that these additional shares were purchased under an Over-Subscription Privilege tied to a prior warrant dividend, which allowed holders who fully exercised their basic warrants to buy extra shares if other holders did not fully participate.
M-tron Industries director David M. Goldman reported exercising derivative securities into common stock. On 12/23/2025, he exercised 1,625 Common Stock Warrants (right to purchase), which resulted in acquiring 325 shares of Common Stock at an exercise price of $47.50 per share. After this transaction, he directly owned 2,357 shares of Common Stock and 5 Common Stock Warrants.
These Warrants were originally distributed as a dividend on April 25, 2025, with holders receiving one Warrant for each share of Common Stock held as of March 10, 2025. Each five Warrants entitle the holder to purchase one share of Common Stock at $47.50 per share, subject to adjustments under the Warrant terms.
M-tron Industries director Hendi Susanto reported a warrant exercise and share acquisition. On 12/23/2025, he acquired 892 shares of M-tron Industries common stock at $47.5 per share through the exercise of common stock warrants.
Following this transaction, he directly owned 7,387 shares of common stock and 1,633 common stock warrants. The warrants were originally issued as a dividend, with holders receiving one warrant for each common share held as of March 10, 2025. Each five warrants entitle the holder to purchase one share of common stock at an exercise price of $47.5 per share, subject to the terms of the warrants.
M-tron Industries, Inc. director Ivan Arteaga reported exercising company warrants into common stock. On 12/19/2025, he acquired 72 shares of common stock at an exercise price of $47.50 per share, increasing his directly held position to 838 shares.
The transaction came from company-issued Common Stock Warrants, which were originally distributed as a dividend of one warrant for each common share held as of March 10, 2025. Each block of five warrants allows the holder to purchase one share of common stock at $47.50, subject to the warrant terms. Following this exercise, Arteaga reported holding 4 warrants directly, representing a smaller remaining right to purchase additional shares.
M-tron Industries, Inc. insider transaction: The company’s CEO and CFO, Cameron Pforr, reported buying 2,000 shares of M-tron Industries common stock on 12/22/2025 at a price of $47.50 per share. After this purchase, Pforr directly owned 22,000 common shares.
The filing also shows derivative holdings. Pforr holds a stock option to buy 25,000 shares at an exercise price of $40.32 per share, exercisable beginning 04/04/2026 and expiring on 04/04/2030. In addition, the report lists 10,000 common stock warrants with an exercise price of $47.50 per share, which relate to a previously disclosed warrant dividend where holders received one warrant for each common share held, and five warrants allow the purchase of one share of common stock.
M-tron Industries, Inc. director reported recent stock and warrant activity. On 12/18/2025, the reporting person acquired 1,000 shares of Common Stock at a price of $ 47.5 per share and, after this transaction, directly beneficially owns 6,603 Common Stock shares. On the same date, a related transaction in Common Stock Warrants (right to purchase) at a conversion or exercise price of $ 47.5 covered warrants exercisable from 10/23/2025 until 12/23/2025, with 201 warrants reported as beneficially owned afterward.
These warrants were originally issued as a dividend on April 25, 2025, when holders of Common Stock as of March 10, 2025 received one warrant for each share held. When exercisable, every five (5) Warrants entitle the holder to purchase one share of Common Stock at an exercise price of $47.50 per share, subject to adjustments under the warrant terms.
M-tron Industries, Inc. director reported an insider transaction involving company stock and warrants. On December 4, 2025, the reporting person acquired 306 shares of Common Stock at a price of $47.50 per share, bringing their directly held Common Stock position to 4,267 shares after the transaction. This stock acquisition was linked to derivative securities.
The filing also shows activity in warrants to purchase Common Stock. The director disposed of 1,530 Common Stock Warrants, which were exercisable to acquire 306 shares of Common Stock, and held 2,779 warrants directly after the transaction. According to the explanation, on April 25, 2025, holders of Common Stock received a dividend of one warrant for each share held as of March 10, 2025, with each five warrants exercisable for one Common share at an exercise price of $47.50 per share.
M-tron Industries, Inc. president William A. Drafts reported an insider stock transaction. On 12/19/2025, he acquired 201 shares of M-tron common stock at a price of $47.50 per share. Following this purchase, he directly beneficially owns 11,209 shares of common stock.
He also holds derivative securities tied to M-tron stock. These include a stock option covering 12,500 shares of common stock at an exercise price of $40.32 per share, with vesting scheduled in tranches through 2028, and common stock warrants that, when exercisable, allow one share of common stock to be purchased for every five warrants at an exercise price of $47.50 per share, subject to the warrant terms.
M-tron Industries, Inc. director John Mega reported a change in his holdings of the company’s securities. Following the reported transactions, he directly owns 5,344 shares of M-tron Industries common stock.
The filing shows that on 12/05/2025, derivative securities in the form of 4,942 common stock warrants were disposed of, leaving 0 warrants beneficially owned afterward. Each warrant was originally issued as part of a dividend and, when exercisable, five warrants entitle the holder to purchase one share of common stock at an exercise price of $47.50 per share, subject to adjustment under the warrant terms.