Insider Transactions Reported by 17 Insiders of DELCATH SYSTEMS, INC.

Symbol: DCTH on Nasdaq
Location: Queensbury, NY

Key facts

DCTH - DELCATH SYSTEMS, INC. has 17 insiders with reported activity on this page.
Net insider value flow over the last year: +$287,368.
Recent transaction rows are available for direct filing-level review.

Change

Buy value: $287,368; sell value: $0.
Net share flow: +32,619.

Research use

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Net insider flow leans to buying over the last 12 months. Net value: +$287,368.

Buys

$287,368

Shares: 32,619

Insiders: 3

Sells

Shares: 0

Insiders: 0

Net

+$287,368

Shares: +32,619

Insiders: 3

Window (months)	Buy shares	Buy $	Sell $	Net $
0-3	16,733	$150,328	$0	+$150,328
3-6	0	$0	$0	$0
6-9	15,886	$137,041	$0	+$137,041
9-12	0	$0	$0	$0

DELCATH SYSTEMS, INC. executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Gil Aharon	Director	$47,360,631			Mixed	13 May 2026
Steven A. J. Salamon	Director	$47,360,631			Mixed	13 May 2026
Rosalind Advisors, Inc.	Director	$47,360,631			Mixed	05 May 2025
Gerard J. Michel	CHIEF EXECUTIVE OFFICER, Director	$3,063,324	+$198,358	+6.9%	Filing P/S	02 Mar 2026
Vojo Vukovic	Chief Medical Officer	$807,255			Mixed	17 Feb 2026
Sandra Pennell	Chief Financial Officer	$696,242	+$50,018	+7.7%	Filing P/S	06 Mar 2026
John Richard Sylvester	Director	$132,781	+$38,992	+42%	Filing P/S	13 May 2026
John Purpura	Chief Operating Officer	$124,578			Mixed	08 Feb 2023
Martha S. Rook	Chief Operating Officer				Mixed	17 Feb 2026
Christine Padula	Interim Principal Accounting Officer				Mixed	01 Sep 2021
Kevin Muir	Gm Interventional Oncology				Mixed	17 Feb 2026
David L. Hoffman	Gen'l Counsel, Cco & Secy				Mixed	17 Feb 2026
Elizabeth Czerepak	Director				Mixed	13 May 2026
Anthony Dias	Vp Finance				Mixed	08 Feb 2023
Roger G. Stoll PhD	Director				Mixed	23 May 2024
Johnny John	Svp Clinical Dev & Med Affairs				Mixed	08 Feb 2023
Bridget A. Martell	Director				Mixed	13 May 2026

Top shareholders of DELCATH SYSTEMS, INC. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Rosalind Advisors, Inc.	13D/G 3/4/5 13F	Director · Company	9.9%	6,719,993	$70,022,327	+$468,900	31 Dec 2025	13D/G 3/4/5 13F
BlackRock, Inc.	13D/G 13F	Company	5%	1,753,024	$18,845,008	$0	30 Sep 2025	13D/G 13F
Vivo Opportunity Fund Holdings, L.P.	13D/G	—	2.2%	750,195	$9,002,340	$0	31 Mar 2025	13D/G
VANGUARD CAPITAL MANAGEMENT LLC	13F	Company	2%	1,329,288	$12,335,793	—	31 Mar 2026	13F
Propel Bio Management, LLC	13F	Company	1.4%	979,698	$9,159,490	—	31 Mar 2026	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1%	692,031	$6,423,891	—	31 Mar 2026	13F
STATE STREET CORP	13F	Company	0.98%	664,428	$6,165,892	—	31 Mar 2026	13F
Private Wealth Advisors, LLC	13F	Company	0.87%	591,524	$5,489,343	—	31 Mar 2026	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.87%	588,055	$5,457,150	—	31 Mar 2026	13F
Divisadero Street Capital Management, LP	13F	Company	0.74%	499,796	$4,638,107	—	31 Mar 2026	13F
Ikarian Capital, LLC	13F	Company	0.64%	431,251	$4,002,009	—	31 Mar 2026	13F
MORGAN STANLEY	13F	Company	0.57%	385,524	$3,577,663	—	31 Mar 2026	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.43%	289,131	$2,683,136	—	31 Mar 2026	13F
Simplify Asset Management Inc.	13F	Company	0.38%	261,126	$2,423,249	—	31 Mar 2026	13F
NORTHERN TRUST CORP	13F	Company	0.37%	251,863	$2,337,288	—	31 Mar 2026	13F
ADAR1 Capital Management, LLC	13F	Company	0.33%	224,385	$2,082,293	—	31 Mar 2026	13F
KENNEDY CAPITAL MANAGEMENT LLC	13F	Company	0.31%	207,923	$1,929,525	—	31 Mar 2026	13F
Lane Generational LLC	13F	Company	0.3%	205,092	$1,903,254	—	31 Mar 2026	13F
VANGUARD FIDUCIARY TRUST CO	13F	Company	0.3%	201,824	$1,872,927	—	31 Mar 2026	13F
ROYCE & ASSOCIATES LP	13F	Company	0.29%	195,000	$1,809,600	—	31 Mar 2026	13F
MARSHALL WACE, LLP	13F	Company	0.28%	191,630	$1,778,328	—	31 Mar 2026	13F
CIBC WORLD MARKET INC.	13F	Company	0.28%	189,737	$1,760,759	—	31 Mar 2026	13F
VANGUARD PORTFOLIO MANAGEMENT LLC	13F	Company	0.26%	178,036	$1,652,174	—	31 Mar 2026	13F
Diametric Capital, LP	13F	Company	0.23%	156,481	$1,452,143	—	31 Mar 2026	13F
RENAISSANCE TECHNOLOGIES LLC	13F	Company	0.23%	155,300	$1,441,184	—	31 Mar 2026	13F
ALGERT GLOBAL LLC	13F	Company	0.21%	145,733	$1,352,000	—	31 Mar 2026	13F
JANE STREET GROUP, LLC	13F	Company	0.19%	128,193	$1,189,631	—	31 Mar 2026	13F
Trexquant Investment LP	13F	Company	0.15%	104,150	$966,512	—	31 Mar 2026	13F
Nuveen, LLC	13F	Company	0.15%	103,774	$963,023	—	31 Mar 2026	13F
Man Group plc	13F	Company	0.15%	102,214	$948,546	—	31 Mar 2026	13F
Bank of New York Mellon Corp	13F	Company	0.15%	98,636	$915,343	—	31 Mar 2026	13F
Capital Advisors Wealth Management, LLC	13F	Company	0.14%	93,000	$863,040	—	31 Mar 2026	13F
Jefferies Financial Group Inc.	13F	Company	0.12%	83,980	$779,334	—	31 Mar 2026	13F
BOOTHBAY FUND MANAGEMENT, LLC	13F	Company	0.12%	81,896	$759,995	—	31 Mar 2026	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.12%	78,625	$729,640	—	31 Mar 2026	13F
Caption Management, LLC	13F	Company	0.11%	77,700	$721,056	—	31 Mar 2026	13F
CITADEL ADVISORS LLC	13F	Company	0.11%	77,264	$717,010	—	31 Mar 2026	13F
UBS Group AG	13F	Company	0.1%	69,139	$641,610	—	31 Mar 2026	13F
BANK OF AMERICA CORP /DE/	13F	Company	0.09%	57,729	$535,725	—	31 Mar 2026	13F
SEI INVESTMENTS CO	13F	Company	0.06%	44,058	$408,858	—	31 Mar 2026	13F
Pale Fire Capital SE	13F	Company	0.06%	40,085	$371,989	—	31 Mar 2026	13F
Creative Planning	13F	Company	0.06%	39,549	$367,015	—	31 Mar 2026	13F
Mariner, LLC	13F	Company	0.06%	39,531	$366,877	—	31 Mar 2026	13F
BALYASNY ASSET MANAGEMENT L.P.	13F	Company	0.06%	38,524	$357,503	—	31 Mar 2026	13F
BARCLAYS PLC	13F	Company	0.06%	37,849	$351,239	—	31 Mar 2026	13F
Aquatic Capital Management LLC	13F	Company	0.05%	36,343	$337,263	—	31 Mar 2026	13F
ExodusPoint Capital Management, LP	13F	Company	0.05%	35,968	$333,783	—	31 Mar 2026	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.05%	35,460	$329,069	—	31 Mar 2026	13F
RHUMBLINE ADVISERS	13F	Company	0.05%	34,334	$318,615	—	31 Mar 2026	13F
AQR CAPITAL MANAGEMENT LLC	13F	Company	0.05%	32,096	$297,850	—	31 Mar 2026	13F

Recent Insider Transactions by Companies or Individuals for DELCATH SYSTEMS, INC.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
John Richard Sylvester	DCTH	Stock Option (right to buy)	Award				22,500	22,500	13 May 2026	Direct
Bridget A. Martell	DCTH	Stock Option (right to buy)	Award				22,500	22,500	13 May 2026	Direct
Elizabeth Czerepak	DCTH	Stock Option (right to buy)	Award				22,500	22,500	13 May 2026	Direct
Steven A. J. Salamon	DCTH	Stock Option (right to buy)	Award				22,500	22,500	13 May 2026	Direct
Gil Aharon	DCTH	Stock Option (right to buy)	Award				22,500	22,500	13 May 2026	Direct
Sandra Pennell	DCTH	Common Stock	Purchase	7.74%	$50,018	$9.04	5,533	77,018	06 Mar 2026	Direct
Gerard J. Michel	DCTH	Common Stock	Purchase	3.39%	$100,309	$8.96	11,200	342,034	02 Mar 2026	Direct
David L. Hoffman	DCTH	Restricted Stock Units	Award				28,250	28,250	17 Feb 2026	Direct
David L. Hoffman	DCTH	Stock Option (Right to Buy)	Award				56,500	56,500	17 Feb 2026	Direct
Kevin Muir	DCTH	Restricted Stock Units	Award				28,250	28,250	17 Feb 2026	Direct
Kevin Muir	DCTH	Stock Option (Right to Buy)	Award				56,500	56,500	17 Feb 2026	Direct
Sandra Pennell	DCTH	Restricted Stock Units	Award				28,250	28,250	17 Feb 2026	Direct
Sandra Pennell	DCTH	Stock Option (Right to Buy)	Award				56,500	56,500	17 Feb 2026	Direct
Vojo Vukovic	DCTH	Restricted Stock Units	Award				28,250	28,250	17 Feb 2026	Direct
Vojo Vukovic	DCTH	Stock Option (Right to Buy)	Award				56,500	56,500	17 Feb 2026	Direct
Martha S. Rook	DCTH	Restricted Stock Units	Award				28,250	28,250	17 Feb 2026	Direct
Martha S. Rook	DCTH	Stock Option (Right to Buy)	Award				56,500	56,500	17 Feb 2026	Direct
Gerard J. Michel	DCTH	Restricted Stock Units	Award				97,500	97,500	17 Feb 2026	Direct
Gerard J. Michel	DCTH	Stock Option (Right to Buy)	Award				195,000	195,000	17 Feb 2026	Direct
John Richard Sylvester	DCTH	Common Stock	Purchase	41.6%	$38,992	$8.89	4,386	14,936	21 Nov 2025	Direct
Gerard J. Michel	DCTH	Common Stock	Purchase	3.6%	$98,049	$8.53	11,500	330,834	11 Nov 2025	Direct
Vojo Vukovic	DCTH	Common Stock	Options Exercise	33.1%			42,000	168,882	12 Jun 2025	Direct
Vojo Vukovic	DCTH	Employee Stock Option (Right to Buy)	Options Exercise	-41.8%			-42,000	58,500	12 Jun 2025	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.