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These shares were sold in multiple transactions at prices ranging from $65.89 to $66.88 inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"In addition to the 761,632 shares and 63,036 shares reported in Column 5, as of  August 14, 2026, 745,000 deferred restricted stock units (RSUs) granted to Mr. DeMarco, representing non-qualified deferred compensation, have vested but remain subject to a previously agreed to 5-year deferral period before issuance and release, which substantially all subject RSUs are scheduled to be released by January 2029, and an additional 750,000 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 2, 2026.  Each RSU represents a contingent right to receive one share of the Company's common stock."}],"balance_after":761632,"source":{"system":"sec-edgar","filing":"0001082440-26-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1082440/000108244026000005/primary_doc.xml","form_type":"4"}},{"id":687269,"issuer":{"id":3567,"kind":"organization","name":"KRATOS DEFENSE & SECURITY SOLUTIONS, INC.","symbol":"KTOS"},"owners":[{"id":23500,"kind":"person","name":"DEMARCO ERIC M","position":1,"cik":"0001082440","reported_name":"DEMARCO ERIC M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2026-08-14T23:51:31.000Z","date":"2026-08-14","kind":"sale","planned":true,"acquired":false,"shares":4946,"price":65.0538,"value":321756.0948,"ownership":{"direct":false,"nature":"by trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This transaction was effected pursuant to a 10b5-1 trading plan adopted  by the reporting person on March 6, 2026 and modified on May 15, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.77 to $65.68 inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":770732,"source":{"system":"sec-edgar","filing":"0001082440-26-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1082440/000108244026000005/primary_doc.xml","form_type":"4"}},{"id":687268,"issuer":{"id":3567,"kind":"organization","name":"KRATOS DEFENSE & SECURITY SOLUTIONS, INC.","symbol":"KTOS"},"owners":[{"id":23500,"kind":"person","name":"DEMARCO ERIC M","position":1,"cik":"0001082440","reported_name":"DEMARCO ERIC M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2026-08-14T23:51:31.000Z","date":"2026-08-14","kind":"sale","planned":true,"acquired":false,"shares":266316,"price":64.3321,"value":17132667.5436,"ownership":{"direct":false,"nature":"by trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This transaction was effected pursuant to a 10b5-1 trading plan adopted  by the reporting person on March 6, 2026 and modified on May 15, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.77 to $64.76 inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":775678,"source":{"system":"sec-edgar","filing":"0001082440-26-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1082440/000108244026000005/primary_doc.xml","form_type":"4"}},{"id":687267,"issuer":{"id":3567,"kind":"organization","name":"KRATOS DEFENSE & SECURITY SOLUTIONS, INC.","symbol":"KTOS"},"owners":[{"id":23500,"kind":"person","name":"DEMARCO ERIC M","position":1,"cik":"0001082440","reported_name":"DEMARCO ERIC M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2026-08-14T23:51:31.000Z","date":"2026-08-14","kind":"sale","planned":true,"acquired":false,"shares":19638,"price":63.3317,"value":1243707.9246,"ownership":{"direct":false,"nature":"by trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"This transaction was effected pursuant to a 10b5-1 trading plan adopted  by the reporting person on March 6, 2026 and modified on May 15, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.77 to $63.76 inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote to this Form 4."}],"balance_after":1041994,"source":{"system":"sec-edgar","filing":"0001082440-26-000005","document":"primary_doc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1082440/000108244026000005/primary_doc.xml","form_type":"4"}},{"id":856804,"issuer":{"id":3567,"kind":"organization","name":"KRATOS DEFENSE & SECURITY SOLUTIONS, INC.","symbol":"KTOS"},"owners":[{"id":23500,"kind":"person","name":"DEMARCO ERIC M","position":1,"cik":"0001082440","reported_name":"DEMARCO ERIC M","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2026-03-07T00:09:40.000Z","date":"2026-03-04","kind":"tax_withholding","planned":false,"acquired":false,"shares":103292,"price":89.13,"value":9206415.96,"ownership":{"direct":false,"nature":"by trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"Shares withheld in a net transaction to satisfy the tax liability, in accordance with Issuer's trading policies, in connection with shares vested as reported in this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"In addition to the 1,061,632 shares and 62,284 shares reported in Column 5, as of  March 4, 2026, 745,000 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. 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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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"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.  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