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The vesting of the RSUs is subject to the Reporting Person's continuous service through each such vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents an RSU award, one-third of which shall vest on February 17, 2027 with the remaining 2/3  two-thirds of the RSUs vesting in equal annual installments over the following two years. The vesting of the RSUs is subject to the Reporting Person's continuous service through each such vesting date."}],"balance_after":28250,"derivative":{"underlying":"Common Stock","underlying_shares":28250},"source":{"system":"sec-edgar","filing":"0001929335-26-000004","document":"form4-02182026_090208.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/872912/000192933526000004/form4-02182026_090208.xml","form_type":"4"}},{"id":898769,"issuer":{"id":5387,"kind":"organization","name":"DELCATH SYSTEMS, INC.","symbol":"DCTH"},"owners":[{"id":66027,"kind":"person","name":"Muir Kevin","position":1,"cik":"0001929335","reported_name":"Muir Kevin","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"GM INTERVENTIONAL ONCOLOGY"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-02-19T02:30:13.000Z","date":"2026-02-17","kind":"grant","planned":false,"acquired":true,"shares":56500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option will vest and become exercisable at the rate of one-thirty-sixth (1/36th) per month with the first such vesting to occur on February 17, 2026 and monthly thereafter for so long as the reporting person remains an employee of Delcath Systems, Inc. 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