Sec Form 4 Filing - Lewandowski Jason @ TAT TECHNOLOGIES LTD - 2026-06-01

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED 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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Lewandowski Jason 2. Issuer Name and Ticker or Trading Symbol TAT TECHNOLOGIES LTD [ TATT] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Operating Officer (Last) (First) (Middle) 9335 HARRIS CORNERS PWKY, UNIT 260 3. Date of Earliest Transaction (MM/DD/YY) 06/01/2026 (Street) CHARLOTTE, NC28269 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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) Code V Amount (A) or (D) Price Ordinary Shares 06/01/2026 M( 1 ) 3,125 A $ 6.59 3,125 D Ordinary Shares 06/01/2026 S( 2 ) 3,125 D $ 41.14 0 D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Options (right to buy) $ 6.59 06/01/2026 M( 1 ) 3,125 06/01/2026 12/01/2028 Ordinary Shares 3,125 $ 41.14 6,250 ( 3 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Lewandowski Jason 9335 HARRIS CORNERS PWKY, UNIT 260 CHARLOTTE, NC28269 Chief Operating Officer Signatures /s/ Jason Lewandowski 06/02/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Transaction Code 'M' - Exercise of stock options. The reporting person exercised 3,125 fully vested stock options at the exercise (strike) price of $6.59 per share as part of a same-day exercise-and-sale transaction. The shares were simultaneously sold and were not retained by the reporting person. ( 2 )Transaction Code 'S' - Open-market sale. Pursuant to a same-day exercise-and-sale transaction, all 3,125 Ordinary Shares acquired upon exercise of the options referenced in footnote 1 were immediately sold at a price of $41.14 per share. The reporting person did not retain any shares from this transaction. Net proceeds to the reporting person (before taxes and commissions) were approximately $107,965 representing the spread between the sale price ($41.14) and the exercise price ($6.59) on 3,125 shares. ( 3 )Following these transactions, the reporting person holds 6,250 unvested options which vest in installments of 3,125 on each of September 1, 2026, and December 1, 2026, subject to the Reporting Person's continued employment with the Issuer through each such vesting date.

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).

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