DELCATH SYSTEMS, INC. — Director's Dealing 2026

Feb 18, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: DELCATH SYSTEMS, INC. (DCTH)
CIK: 0000872912
Period of Report: 2026-02-17

Reporting Person: Rook Martha S. (N/A)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-17	Stock Option (Right to Buy)	$9.40	A	56500	Acquired	2036-02-17	Common Stock (56500)	Direct
2026-02-17	Restricted Stock Units	$	A	28250	Acquired		Common Stock (28250)	Direct

Footnotes

F1: 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. (and subject to the terms and conditions of the Delcath Systems, Inc. 2020 Omnibus Equity Incentive Plan, as amended).

F2: Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.

F3: 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.