Statement of Changes in Beneficial Ownership (Form 4)

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES 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

(Print or Type Responses)

1. Name and Address of Reporting Person * DEMARCO ERIC M 2. Issuer Name and Ticker or Trading Symbol KRATOS DEFENSE & SECURITY SOLUTIONS, INC. [KTOS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) President & CEO (Last) (First) (Middle) 10680 TREENA STREET, SUITE 600 3. Date of Earliest Transaction (Month/Day/Year) 01/09/2026 (Street) SAN DIEGO, CA 92131 4. If Amendment, Date Original Filed (Month/Day/Year) 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 (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) Code V Amount (A) or (D) Price Common Stock 01/09/2026 M 75,000(2) A $ 0 762,116(4) I by trust Common Stock 01/09/2026 F 29,512(3) D $79.29 732,604(4)(5) I by trust Common Stock 62,203(5)(6) D

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
	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 control number.		SEC 1474 (9-02)

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 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

Restricted Stock Units

(1)

01/09/2026

M

75,000

(2)

(2)

Common Stock

75,000

$ 0

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DEMARCO ERIC M 10680 TREENA STREET, SUITE 600 SAN DIEGO, CA 92131	X		President & CEO

Signatures

Eric M. DeMarco, by Eva Yee, Attorney-In-Fact		01/12/2026
**Signature of Reporting Person		Date

Explanation of Responses:

*	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).
(1)	Each restricted stock unit (RSU) represents a contingent right to receive one share of Issuer's common stock.
(2)	RSUs were granted and previously reported on a Form 4 filed January 4, 2011, which were released after a 5-year deferral period after the vest date.
(3)	Shares withheld in a net transaction to satisfy the tax liability, in accordance with Issuer's trading policies, in connection with shares released as reported in this Form 4.
(4)	RSUs were granted to Reporting Person, and per Reporting Person's instructions, the common stock from such released RSUs were issued to Reporting Person's trust. Due to an administrative oversight, the reporting person's number of securities beneficially owned following the reported transaction in Item 5 of Table I in prior Form 4s was overstated by one share.
(5)	In addition to the 732,604 shares and 62,203 shares reported in Column 5, as of Jan. 9, 2026, 1,137,500 deferred RSUs granted to Mr. DeMarco, representing non-qualified deferred compensation, have vested but remain subject to a previously agree to 5-year deferral period before issuance and release, which substantially all subject RSUs are scheduled to be released by January 2029. An additional 600,000 RSUs granted to Mr. DeMarco are currently unvested and will only vest upon achievement of applicable vesting terms described in our proxy statement on Schedule 14A filed with the SEC on April 4, 2025. In addition, 300,000 RSUs were granted January 3, 2026, where 150,000 RSUs vest ratably over a five-year period, and 150,000 RSUs are performance-based RSUS that vest when certain performance criteria are met (similar to the vesting terms described in the April 4, 2025 proxy statement). Each RSU represents a contingent right to receive one share of the Company's common stock.
(6)	Includes 43,674 shares purchased through Issuer's Employee Stock Purchase Plan and approximately 18,529 shares held through Issuer's 401(k).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure. Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.