DELCATH SYS INC DCTH
COM NEW · Common Stock · CUSIP 24661P807 · ISIN US24661P8077
- SectorHealth care
- IndustrySurgical & Medical Instruments & Apparatus
- HeadquartersQueensbury, NY
- Founded1988
- Websitedelcath.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($3.4m this quarter). Holder counts are more reliable. Shares outstanding: 34.7m as of 2026-07-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $12.59. Options: 7 managers hold calls ($3.9m notional), 4 hold puts ($2.3m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 24 |
| Q4 2022 | 23 |
| Q1 2023 | 25 |
| Q2 2023 | 32 |
| Q3 2023 | 39 |
| Q4 2023 | 43 |
| Q1 2024 | 37 |
| Q2 2024 | 53 |
| Q3 2024 | 70 |
| Q4 2024 | 91 |
| Q1 2025 | 99 |
| Q2 2025 | 118 |
| Q3 2025 | 124 |
| Q4 2025 | 119 |
| Q1 2026 | 121 |
| Q2 2026 | 120 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 38 | 19 |
| Q4 2024 | 60 | 21 |
| Q1 2025 | 61 | 38 |
| Q2 2025 | 87 | 48 |
| Q3 2025 | 69 | 60 |
| Q4 2025 | 60 | 55 |
| Q1 2026 | 60 | 59 |
| Q2 2026 | 68 | 46 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $2.3m | $1.8m | 0.78 |
| Q4 2025 | $993.8k | $2.7m | 2.76 |
| Q1 2026 | $2.7m | $2.5m | 0.93 |
| Q2 2026 | $3.9m | $2.3m | 0.59 |
Biggest buyers
| BlackRock, Inc. | Added | +922.3k |
| ALGERT GLOBAL LLC | Added | +435.0k |
| ExodusPoint Capital Management, LP | Added | +323.9k |
| DIMENSIONAL FUND ADVISORS LP | New | +210.3k |
| AQR CAPITAL MANAGEMENT LLC | Added | +140.9k |
| HSBC HOLDINGS PLC | New | +135.6k |
| Jump Financial, LLC | New | +88.0k |
| Nuveen, LLC | Added | +77.8k |
| BARCLAYS PLC | Added | +70.1k |
| GSA CAPITAL PARTNERS LLP | Added | +69.9k |
Biggest sellers
| Private Wealth Advisors, LLC | Reduced | -280.7k |
| Ikarian Capital, LLC | Reduced | -245.6k |
| ROYCE & ASSOCIATES LP | Sold out | -195.0k |
| RENAISSANCE TECHNOLOGIES LLC | Sold out | -155.3k |
| JANE STREET GROUP, LLC | Sold out | -128.2k |
| Propel Bio Management, LLC | Reduced | -108.2k |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | -108.0k |
| Trexquant Investment LP | Sold out | -104.2k |
| CITADEL ADVISORS LLC | Reduced | -62.2k |
| BOOTHBAY FUND MANAGEMENT, LLC | Reduced | -56.5k |
Biggest calls
| Caption Management, LLC | Unchanged | $1.3m100.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $1.0m81.2k shares |
| Stonepine Capital Management, LLC | Unchanged | $1.0m100.0k shares |
| CITADEL ADVISORS LLC | Reduced | $334.9k26.6k shares |
| GROUP ONE TRADING LLC | Added | $120.9k9.6k shares |
| SIMPLEX TRADING, LLC | Reduced | $69.2k5.5k shares |
| Private Wealth Advisors, LLC | New | $63.0k5.0k shares |
Biggest puts
| Caption Management, LLC | Unchanged | $1.9m150.5k shares |
| CITADEL ADVISORS LLC | Reduced | $202.7k16.1k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $188.8k15.0k shares |
| SIMPLEX TRADING, LLC | Added | $12.6k1.0k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
Rosalind Advisors, Inc.
13D · may seek influence
no change · filed 2026-10-19
Stated purposeItem 4 is hereby amended and supplemented as follows: On May 6, 2020, pursuant to the terms of the Board Appointment Agreement, the Board of Directors of the Issuer (the Board) increased the number of directors constituting the Board to eight members and elected Steven Salamon and Gilad Aharon as independent directors of the Issuer to fill the vacancies created by the increase in the number of directors. Mr. Salamon was elected to serve as a Class III director with a term scheduled to expire at the 2024 Annual Meeting of Stockholders and Dr. Aharon was elected to serve as a Class I director with a term scheduled to expire at the 2025 Annual Meeting of Stockholders. Full filing |
9.9% |
| BlackRock Portfolio Management LLC 13G · institution new · filed 2026-10-27 | 6.3% |
| BlackRock, Inc. 13G · institution +0.3 pts · filed 2026-07-28 | 5.3% |
| Kaufman Daniel Louis 13G · passive investor new · filed 2026-03-20 | 5.1% |
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 2 | $137.1k | 0 | — | — |
| Q1 2026 | 2 | $150.4k | 0 | — | — |
| Q2 2026 | 0 | — | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
None reported since 1 Apr 2026.
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| Rosalind Advisors, Inc. 15.61% of their portfolio | 3.3m $41.6m | Unchanged |
| BlackRock, Inc. 0.00% of their portfolio | 2.7m $34.1m | Added +922.3k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 1.2m $15.4m | Reduced -108.0k |
| Propel Bio Management, LLC 5.74% of their portfolio | 871.5k $11.0m | Reduced -108.2k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 733.1k $9.2m | Added +41.1k |
| STATE STREET CORP 0.00% of their portfolio | 679.3k $8.6m | Added +14.9k |
| ALGERT GLOBAL LLC 0.09% of their portfolio | 580.7k $7.3m | Added +435.0k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 566.4k $7.1m | Reduced -21.7k |
| Divisadero Street Capital Management, LP 0.15% of their portfolio | 499.8k $6.3m | Unchanged |
| MORGAN STANLEY 0.00% of their portfolio | 408.0k $5.1m | Added +22.5k |
| ExodusPoint Capital Management, LP 0.04% of their portfolio | 359.9k $4.5m | Added +323.9k |
| Private Wealth Advisors, LLC 1.17% of their portfolio | 310.9k $3.9m | Reduced -280.7k |
| Simplify Asset Management Inc. 0.05% of their portfolio | 264.8k $3.3m | Added +3.6k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 252.1k $3.2m | Added +245 |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 250.3k $3.2m | Reduced -38.8k |
| ADAR1 Capital Management, LLC 0.13% of their portfolio | 224.4k $2.8m | Unchanged |
| MARSHALL WACE, LLP 0.00% of their portfolio | 219.0k $2.8m | Added +27.3k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 210.3k $2.6m | New |
| KENNEDY CAPITAL MANAGEMENT LLC 0.05% of their portfolio | 204.1k $2.6m | Reduced -3.8k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 193.4k $2.4m | Added +15.4k |
| Ikarian Capital, LLC 0.38% of their portfolio | 185.7k $2.3m | Reduced -245.6k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 181.9k $2.3m | Reduced -19.9k |
| Nuveen, LLC 0.00% of their portfolio | 181.6k $2.3m | Added +77.8k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 173.0k $2.2m | Added +140.9k |
| CIBC WORLD MARKET INC. 0.00% of their portfolio | 163.2k $2.1m | Reduced -26.5k |
| Lane Generational LLC 1.65% of their portfolio | 149.7k $1.9m | Reduced -55.4k |
| HSBC HOLDINGS PLC 0.00% of their portfolio | 135.6k $1.7m | New |
| Man Group plc 0.00% of their portfolio | 128.5k $1.6m | Added +26.3k |
| Diametric Capital, LP 0.16% of their portfolio | 122.8k $1.5m | Reduced -33.6k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 108.2k $1.4m | Added +9.5k |
| BARCLAYS PLC 0.00% of their portfolio | 108.0k $1.4m | Added +70.1k |
| Capital Advisors Wealth Management, LLC 0.14% of their portfolio | 93.0k $1.2m | Unchanged |
| Jump Financial, LLC 0.01% of their portfolio | 88.0k $1.1m | New |
| GSA CAPITAL PARTNERS LLP 0.07% of their portfolio | 86.0k $1.1m | Added +69.9k |
| Jefferies Financial Group Inc. 0.01% of their portfolio | 84.0k $1.1m | Unchanged |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 83.5k $1.1m | Added +4.8k |
| Caption Management, LLC 0.03% of their portfolio | 77.7k $978.2k | Unchanged |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 67.7k $851.8k | Added +65.1k |
| FOX RUN MANAGEMENT, L.L.C. 0.13% of their portfolio | 61.7k $776.5k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 61.5k $774.6k | Added +3.8k |
| Quantbot Technologies LP 0.03% of their portfolio | 59.6k $749.9k | Added +50.3k |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 57.9k $728.9k | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 57.7k $725.9k | Added +44.6k |
| Creative Planning 0.00% of their portfolio | 48.4k $609.8k | Added +8.9k |
| UBS Group AG 0.00% of their portfolio | 41.7k $525.2k | Reduced -27.4k |
| Pale Fire Capital SE 0.04% of their portfolio | 40.1k $504.7k | Unchanged |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 36.4k $458.8k | Added +2.1k |
| ALPS ADVISORS INC 0.00% of their portfolio | 35.0k $441.2k | Added +6.8k |
| EntryPoint Capital, LLC 0.11% of their portfolio | 34.8k $437.6k | Added +9.7k |
| SEI INVESTMENTS CO 0.00% of their portfolio | 31.4k $394.9k | Reduced -12.7k |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 30.1k $378.4k | Added +17.9k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 29.2k $368.1k | Added +1.6k |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 28.5k $358.4k | Reduced -10.1k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 28.4k $357.0k | Added +17.1k |
| Leonteq Securities AG 0.02% of their portfolio | 27.7k $348.7k | Added +17.7k |
| State of Alaska, Department of Revenue 0.00% of their portfolio | 26.0k $327.0k | Unchanged |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 25.8k $239.4k | Added +11.8k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio | 25.4k $319.5k | Reduced -56.5k |
| Xcelsior Advisor Partners LLC 0.04% of their portfolio | 25.3k $318.5k | New |
| Palisades Investment Partners, LLC 0.08% of their portfolio | 23.3k $293.0k | Added +9.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 21.5k $271.0k | Unchanged |
| MetLife Investment Management, LLC 0.00% of their portfolio | 18.7k $235.0k | Unchanged |
| Invesco Ltd. 0.00% of their portfolio | 17.8k $223.9k | Added +650 |
| WealthPlan Investment Management, LLC 0.01% of their portfolio | 17.4k $219.6k | Unchanged |
| NOMURA HOLDINGS INC 0.00% of their portfolio | 16.7k $210.5k | Added +1.0k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 15.0k $189.4k | Reduced -62.2k |
| SkyOak Wealth, LLC 0.03% of their portfolio | 15.0k $188.8k | Unchanged |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 14.3k $180.0k | Reduced -4.1k |
| CITIGROUP INC 0.00% of their portfolio | 13.3k $167.4k | Added +11.7k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 13.2k $166.7k | Reduced -917 |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 12.9k $167.5k | Reduced -237 |
| TUDOR INVESTMENT CORP ET AL 0.00% of their portfolio | 12.0k $151.6k | Reduced -10.0k |
| LANARK FINANCIAL, INC. 0.01% of their portfolio | 12.0k $150.5k | Unchanged |
| MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio | 11.2k $140.7k | New |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 10.6k $133.9k | Unchanged |
| Schonfeld Strategic Advisors LLC 0.00% of their portfolio | 10.4k $131.1k | New |
| LPL Financial LLC 0.00% of their portfolio | 10.2k $128.9k | Reduced -10.5k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 10.1k $126.6k | New |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 8.8k $110.7k | Unchanged |
| FMR LLC 0.00% of their portfolio | 5.5k $69.2k | Added +677 |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 4.8k $60.4k | Unchanged |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 4.8k $60.3k | Added +4.2k |
| Persistent Asset Partners Ltd 0.02% of their portfolio | 4.2k $53.0k | New |
| Arax Advisory Partners 0.00% of their portfolio | 4.1k $51.9k | New |
| IFP Advisors, Inc 0.00% of their portfolio | 4.1k $51.7k | New |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 3.8k $48.1k | New |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 3.1k $38.7k | Unchanged |
| Legal & General Group Plc 0.00% of their portfolio | 2.7k $34.5k | Unchanged |
| Tripletail Wealth Management, LLC 0.02% of their portfolio | 1.3k $16.6k | Reduced -17.1k |
| Federation des caisses Desjardins du Quebec 0.00% of their portfolio | 1.1k $14.2k | Added +126 |
| Covestor Ltd 0.01% of their portfolio | 1.1k $14.0k | Added +115 |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 1.1k $13.7k | Reduced -283 |
| Activest Wealth Management 0.00% of their portfolio | 1.0k $12.6k | Unchanged |
| Geneos Wealth Management Inc. 0.00% of their portfolio | 923 $11.6k | Unchanged |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 832 $10.5k | New |
| Allworth Financial LP 0.00% of their portfolio | 755 $9.5k | Added +604 |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 755 $9.5k | Added +200 |
| Quent Capital, LLC 0.00% of their portfolio | 580 $7.3k | Reduced -314 |
| GAMMA Investing LLC 0.00% of their portfolio | 512 $6.4k | Added +100 |
| Sterling Capital Management LLC 0.00% of their portfolio | 510 $6.4k | Added +316 |