SEC ownership of DELCATH SYSTEMS, INC.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000872912.

Comparable stake leader

Rosalind Advisors, Inc.

Disclosed value leader

Rosalind Advisors, Inc.

Comparable rows

4/50

Latest evidence

13 Oct 2026

Top shareholders Insider holders Latest transactions
Public ticker
DCTH on Nasdaq
Parsed ownership sources
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
Rosalind Advisors, Inc.
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
4 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
Rosalind Advisors, Inc.
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
13 Oct 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0000872912
Issuer location
Queensbury, NY

Ownership snapshot

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

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
Rosalind Advisors, Inc.
Disclosed value leader
Rosalind Advisors, Inc.
Comparable rows
4/50
Latest evidence
13 Oct 2026
13D/G 3/4/5 13F Lead comparable stake: 9.9% 46 rows are not safely comparable across share classes. 13D/G row: Rosalind Advisors, Inc. Showing 1-8 of 50 holder rows.

Quick read

Rosalind Advisors, Inc. leads the comparable SEC ownership view at 9.9%.

4 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Rosalind Advisors, Inc.'s linked filing trail.
Comparable ownership Top 4
Rosalind Advisors, Inc. 9.9%
BlackRock Portfolio Management LLC 6.3%
BlackRock, Inc. 5.3%
Vivo Opportunity Fund Holdings, L.P. 2.2%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
Rosalind Advisors, Inc.
13D/G 3/4/5 13F
Director · Company
13D/G 3/4/5 13F
9.9%
Reported 13D/G · 13 Oct 2026
$106,879,081
6,692,491 shares
 -$439,207 13 Oct 2026
BlackRock Portfolio Management LLC
13D/G
13D/G
6.3%
Reported 13D/G · 30 Sep 2026
$34,822,473
2,180,493 shares
 $0 30 Sep 2026
BlackRock, Inc.
13F 13D/G
Company
13F 13D/G
5.3%
Reported 13D/G · 30 Jun 2026
$34,078,638
2,706,802 shares
 — 30 Jun 2026
Vivo Opportunity Fund Holdings, L.P.
13D/G
13D/G
2.2%
Reported 13D/G · 31 Mar 2025
$9,002,340
750,195 shares
 $0 31 Mar 2025
Gil Aharon
3/4/5
Director
3/4/5
—
mixed-class rows
$67,357,751
4,745,124 shares
mixed-class rows
 — 13 Oct 2026
Steven A. J. Salamon
3/4/5
Director
3/4/5
—
mixed-class rows
$67,357,751
4,745,124 shares
mixed-class rows
 — 13 Oct 2026
VANGUARD CAPITAL MANAGEMENT LLC
13F
Company
13F
—
denominator unverified
$15,375,500
1,221,247 shares
 — 30 Jun 2026
Propel Bio Management, LLC
13F
Company
13F
—
denominator unverified
$10,971,681
871,460 shares
 — 30 Jun 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

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

Buys
$287,368
Insiders: 3
Sells
$0
Insiders: 0
Net
+$287,368
Shares: +32,619
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 32,619 Shares: 0
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 0 $0 $0 $0
3-6 0 0 $0 $0 $0
6-9 16,733 0 $150,328 $0 +$150,328
9-12 15,886 0 $137,041 $0 +$137,041

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-17 of 17 reporting-owner rows connected to DELCATH SYSTEMS, INC.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
17
Largest Forms 3/4/5 holder
Gil Aharon
Net 12M change
+$287.37KFull value: +$287,368 · USD · 12-month change
Latest report
13 Oct 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Gil Aharon Director $67,357,751 Mixed 13 Oct 2026
Steven A. J. Salamon Director $67,357,751 Mixed 13 Oct 2026
Rosalind Advisors, Inc. Director $67,357,751 Mixed 13 Oct 2026
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

Recent insider transactions for DELCATH SYSTEMS, INC.

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

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Rosalind Advisors, Inc. DCTH Common Stock Other -0.8% -27,502 3,389,593 13 Oct 2026 By Rosalind Advisors Inc., the advisor to the Rosalind Funds
Rosalind Advisors, Inc. DCTH Common Stock Other -0.8% -27,502 3,389,593 13 Oct 2026 By Rosalind Advisors Inc., the advisor to the Rosalind Funds
Rosalind Advisors, Inc. DCTH Common Stock Other -0.8% -27,502 3,389,593 13 Oct 2026 By Rosalind Advisors Inc., the advisor to the Rosalind Funds
Rosalind Advisors, Inc. DCTH Common Stock Conversion of derivative security 0.11% 3,627 3,417,095 13 Oct 2026 By Rosalind Advisors Inc., the advisor to the Rosalind Funds
Rosalind Advisors, Inc. DCTH Common Stock Conversion of derivative security 0.11% 3,627 3,417,095 13 Oct 2026 By Rosalind Advisors Inc., the advisor to the Rosalind Funds
Rosalind Advisors, Inc. DCTH Common Stock Conversion of derivative security 0.11% 3,627 3,417,095 13 Oct 2026 By Rosalind Advisors Inc., the advisor to the Rosalind Funds
Rosalind Advisors, Inc. DCTH Series E preferred Conversion of derivative security -0.4% -36.27 9,112 13 Oct 2026 Each Reporting Persons disclaims beneficial ownership over the shares except to the extent of his or
Rosalind Advisors, Inc. DCTH Series E preferred Conversion of derivative security -0.4% -36.27 9,112 13 Oct 2026 Each Reporting Persons disclaims beneficial ownership over the shares except to the extent of his or
Rosalind Advisors, Inc. DCTH Series E preferred Conversion of derivative security -0.4% -36.27 9,112 13 Oct 2026 Each Reporting Persons disclaims beneficial ownership over the shares except to the extent of his or
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
* marks a reported price that did not pass the local price check.
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