Delcath COO granted stock options and RSUs

Rook Martha S. reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Rook Martha S. reported acquisition or exercise transactions in this Form 4 filing.

Delcath Systems chief operating officer Martha S. Rook reported new equity compensation grants. She received stock options for 56,500 shares at no cost, vesting at a rate of one‑thirty‑sixth per month starting on February 17, 2026, as long as she remains an employee.

Rook also received 28,250 restricted stock units, each representing one share of common stock. One‑third of these RSUs will vest on February 17, 2027, with the remaining two‑thirds vesting in equal annual installments over the following two years, subject to her continuous service.

Insider Trade Summary

Grant/Award: 84,750 shares

Grant/Award 2 txns

Insider Rook Martha S.

Role CHIEF OPERATING OFFICER

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	56,500	$0.00	$0.00
Grant/Award	Restricted Stock Units	28,250	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 56,500 contracts (Direct); Restricted Stock Units — 28,250 contracts (Direct)

Footnotes (3)

1. 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).
2. F2. Each restricted stock unit ("RSU") represents a contingent right to receive one share of common stock.
3. 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Delcath Systems (DCTH) report for Martha S. Rook?

Delcath Systems reported that COO Martha S. Rook received grants of 56,500 stock options and 28,250 restricted stock units. These equity awards vest over several years, aligning compensation with her continued employment and long-term company performance incentives.

How many stock options were granted to the Delcath Systems COO in this Form 4?

Martha S. Rook was granted 56,500 stock options at an exercise price of $0.00 per share. These options vest in 36 equal monthly installments beginning February 17, 2026, provided she remains an employee of Delcath Systems throughout the vesting period.

What are the vesting terms of Martha S. Rook’s restricted stock units at Delcath Systems (DCTH)?

Rook received 28,250 restricted stock units, each representing one share of common stock. One-third vests on February 17, 2027, with the remaining two-thirds vesting in equal annual installments over the next two years, contingent on continuous service.

Does the Delcath Systems Form 4 show a stock purchase or sale by Martha S. Rook?

The Form 4 shows equity award acquisitions, not open-market purchases or sales. Martha S. Rook received option and RSU grants coded as awards, reflecting compensation rather than discretionary trading activity in Delcath Systems common stock.

What does each Delcath Systems RSU granted to Martha S. Rook represent?

Each restricted stock unit granted to Martha S. Rook represents a contingent right to receive one share of Delcath Systems common stock. Actual share delivery depends on satisfying the time-based vesting conditions tied to her continued service with the company.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 02/18/2026 - 09:30 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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
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

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 for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Rook Martha S.

(Last) (First) (Middle)

C/O DELCATH SYSTEMS, INC.

566 QUEENSBURY AVENUE

(Street)

QUEENSBURY NY 12804

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
DELCATH SYSTEMS, INC. [ DCTH ]

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

3. Date of Earliest Transaction (Month/Day/Year)
02/17/2026

4. If Amendment, Date of 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

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

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 Securities Underlying Derivative Security (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: 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 Option (Right to Buy)	$9.4	02/17/2026		A		56,500		(1)	02/17/2036	Common Stock	56,500	$0	56,500	D
Restricted Stock Units	(2)	02/17/2026		A		28,250		(3)	(3)	Common Stock	28,250	$0	28,250	D

Explanation of Responses:

1. 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).

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

3. 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.

	/s/ David Hoffman, Attorney-in-Fact	02/18/2026
	** Signature of Reporting Person	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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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 Number.