STOCK TITAN

M-tron (MPTI) finance EVP sells shares, keeps 10K options

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

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.

Positive

  • None.

Negative

  • None.
Insider Biles Linda M
Role Executive VP - Finance
Sold 3,420 shs ($0.00)
Type Security Shares Price Value
Sale Subscription Rights (right to purchase) 2,700 $0.00 --
Sale Common Stock 720 $0.00 --
holding Stock Option (right to buy) -- -- --
Holdings After Transaction: Subscription Rights (right to purchase) — 24,643 shares (Direct); Common Stock — 28,682 shares (Direct); Stock Option (right to buy) — 10,000 shares (Direct)
Footnotes (1)
  1. Stock options of the Issuer vesting as follows: 30% on 4/4/2026, 30% on 4/4/2027, and 40% on 4/4/2028. On March 30, 2026, holders of the Issuer's common stock, par value $0.01 per share (the "Common Stock"), received one subscription right (the "Rights") for each share of Common Stock held by such holder as of March 27, 2026. When exercisable, five (5) Rights will entitle their holder to purchase one share of Common Stock at an exercise price of $59.00 per share.
Subscription rights sold 2,700 rights Open-market sale on April 14, 2026
Common shares sold 720 shares Open-market sale on April 14, 2026
Net securities sold 3,420 securities Net sell across reported transactions
Common shares held after 28,682 shares Direct ownership after April 14, 2026 trades
Subscription rights held after 24,643 rights Direct holding following rights sale
Rights exercise price $59.00 per share Five rights to purchase one common share
Stock option position 10,000 underlying shares at $40.32 Options expiring April 4, 2030
Option vesting schedule 30%/30%/40% Vesting in 2026, 2027, and 2028
Subscription Rights financial
"received one subscription right for each share of Common Stock held"
Subscription rights are short-term privileges given to existing shareholders to buy additional new shares before the general public, typically at a set price and in proportion to their current holdings. Think of it as getting a coupon for first dibs on extra slices of a pizza so your share of the pie doesn’t shrink; exercising them can be a cheaper way to maintain your ownership and voting power, while ignoring them can reduce your stake and potential future earnings.
Stock Option (right to buy) financial
"Stock Option (right to buy) with 10,000 underlying shares of Common Stock"
exercise price financial
"purchase one share of Common Stock at an exercise price of $59.00 per share"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
vesting financial
"Stock options of the Issuer vesting as follows: 30% on 4/4/2026"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Biles Linda M

(Last)(First)(Middle)
2525 SHADER RD

(Street)
ORLANDO FLORIDA 32804

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
M-tron Industries, Inc. [ MPTI ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Executive VP - Finance
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/14/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock04/14/2026S720D$028,682D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right to buy)$40.3204/04/2026(1)04/04/2030Common Stock10,00010,000D
Subscription Rights (right to purchase)$59(2)04/14/2026S2,70003/31/202604/20/2026Common Stock540$024,643D
Explanation of Responses:
1. Stock options of the Issuer vesting as follows: 30% on 4/4/2026, 30% on 4/4/2027, and 40% on 4/4/2028.
2. On March 30, 2026, holders of the Issuer's common stock, par value $0.01 per share (the "Common Stock"), received one subscription right (the "Rights") for each share of Common Stock held by such holder as of March 27, 2026. When exercisable, five (5) Rights will entitle their holder to purchase one share of Common Stock at an exercise price of $59.00 per share.
/s/ Linda M. Biles04/15/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did M-tron Industries (MPTI) report for Linda M. Biles?

M-tron Industries reported that Executive VP - Finance Linda M. Biles sold 2,700 subscription rights and 720 shares of common stock on April 14, 2026. These open-market transactions totaled 3,420 securities and were followed by updated holdings disclosures in both common stock and rights.

How many MPTI shares does Linda M. Biles hold after the reported Form 4 trades?

After the April 14, 2026 sales, Linda M. Biles directly holds 28,682 shares of M-tron Industries common stock. The filing also shows she continues to hold subscription rights and stock options tied to additional underlying common shares of the company.

What subscription rights did MPTI insiders receive and how did Linda M. Biles trade them?

Holders of M-tron common stock received one subscription right per share as of March 27, 2026, with five rights exercisable for one share at $59.00 per share. Linda M. Biles sold 2,700 of these rights, which correspond to 540 underlying shares, in open-market transactions.

What stock options for MPTI common stock does Linda M. Biles retain?

Linda M. Biles holds stock options on 10,000 shares of M-tron common stock at an exercise price of $40.32 per share, expiring April 4, 2030. According to the filing, these options vest 30% in 2026, 30% in 2027, and 40% in 2028.

How significant are the MPTI insider sales by Linda M. Biles compared to her remaining position?

The filing shows net sales of 3,420 securities, while Linda M. Biles still holds 28,682 common shares, 24,643 subscription rights, and options on 10,000 shares. This indicates she retains a substantial equity position in M-tron Industries after the reported transactions.

What is the exercise price and structure of MPTI’s subscription rights program mentioned in the Form 4?

The subscription rights program grants one right per common share held on March 27, 2026. When exercisable, five rights allow purchase of one M-tron common share at an exercise price of $59.00 per share, according to the filing’s footnote disclosure.