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 ($1.6m this quarter). Holder counts are more reliable. Shares outstanding: 35.0m as of 2025-07-31, 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 ≈ $12.95. Options: 7 managers hold calls ($2.4m notional), 5 hold puts ($557.9k).
Trends to Q2 2025
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 |
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 2023 | 23 | 12 |
| Q4 2023 | 28 | 12 |
| Q1 2024 | 15 | 19 |
| Q2 2024 | 36 | 13 |
| Q3 2024 | 38 | 19 |
| Q4 2024 | 60 | 21 |
| Q1 2025 | 61 | 38 |
| Q2 2025 | 87 | 48 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $3.3m | $389.6k | 0.12 |
| Q4 2024 | $2.0m | $730.4k | 0.36 |
| Q1 2025 | $1.9m | $717.0k | 0.37 |
| Q2 2025 | $2.4m | $557.9k | 0.24 |
Biggest buyers
| BlackRock, Inc. | Added | +1.5m |
| CITADEL ADVISORS LLC | Added | +677.7k |
| MARSHALL WACE, LLP | New | +483.3k |
| Rosalind Advisors, Inc. | Added | +400.0k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +394.9k |
| STATE STREET CORP | Added | +360.1k |
| Ikarian Capital, LLC | Added | +222.0k |
| VANGUARD GROUP INC | Added | +216.7k |
| TUDOR INVESTMENT CORP ET AL | New | +197.7k |
| NORTHERN TRUST CORP | Added | +175.3k |
Biggest sellers
| ExodusPoint Capital Management, LP | Sold out | -699.4k |
| GILDER GAGNON HOWE & CO LLC | Reduced | -505.4k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | -482.7k |
| PERCEPTIVE ADVISORS LLC | Sold out | -462.4k |
| AIGH Capital Management LLC | Sold out | -260.7k |
| Soleus Capital Management, L.P. | Reduced | -207.7k |
| Vivo Capital, LLC | Reduced | -180.7k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -172.3k |
| SILVERARC CAPITAL MANAGEMENT, LLC | Reduced | -88.4k |
| Squarepoint Ops LLC | Reduced | -70.7k |
Biggest calls
| GROUP ONE TRADING LLC | Added | $667.8k49.1k shares |
| CITADEL ADVISORS LLC | Added | $525.0k38.6k shares |
| WOLVERINE TRADING, LLC | Reduced | $404.4k29.8k shares |
| SIMPLEX TRADING, LLC | Reduced | $266.0k19.6k shares |
| JANE STREET GROUP, LLC | New | $250.2k18.4k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $244.8k18.0k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Reduced | $355.0k26.1k shares |
| WOLVERINE TRADING, LLC | Reduced | $171.0k12.6k shares |
| SIMPLEX TRADING, LLC | Added | $17.0k1.3k shares |
| GROUP ONE TRADING LLC | Reduced | $15.0k1.1k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 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 in Q2 2025
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 |
|---|---|---|---|---|---|
| Q3 2023 | 1 | $50.6k | 0 | — | — |
| Q4 2023 | 6 | $830.8k | 0 | — | — |
| Q1 2024 | 2 | $100.0k | 0 | — | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
None reported in Q2 2025.
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| Rosalind Advisors, Inc. 15.97% of their portfolio | 3.3m $33.0m | Added +400.0k |
| BlackRock, Inc. 0.00% of their portfolio | 1.7m $23.4m | Added +1.5m |
| VANGUARD GROUP INC 0.00% of their portfolio | 1.6m $21.9m | Added +216.7k |
| DEERFIELD MANAGEMENT COMPANY, L.P. 0.20% of their portfolio | 812.6k $11.1m | Reduced -545 |
| CITADEL ADVISORS LLC 0.01% of their portfolio | 803.2k $10.9m | Added +677.7k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 703.2k $9.6m | Added +394.9k |
| Vivo Capital, LLC 0.79% of their portfolio | 569.5k $7.7m | Reduced -180.7k |
| MARSHALL WACE, LLP 0.01% of their portfolio | 483.3k $6.6m | New |
| STATE STREET CORP 0.00% of their portfolio | 473.9k $6.4m | Added +360.1k |
| MORGAN STANLEY 0.00% of their portfolio | 457.4k $6.2m | Added +114.3k |
| OBERWEIS ASSET MANAGEMENT INC/ 0.25% of their portfolio | 419.4k $5.7m | Added +57.2k |
| Invesco Ltd. 0.00% of their portfolio | 347.0k $4.7m | Reduced -52.4k |
| Ikarian Capital, LLC 1.45% of their portfolio | 322.4k $4.4m | Added +222.0k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.10% of their portfolio | 319.0k $4.3m | Added +26.9k |
| Cubist Systematic Strategies, LLC 0.05% of their portfolio | 306.3k $4.2m | Added +23.8k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 272.3k $3.7m | Added +175.3k |
| Palisades Investment Partners, LLC 1.61% of their portfolio | 270.3k $3.7m | Added +99.2k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 249.8k $3.4m | Reduced -172.3k |
| Propel Bio Management, LLC 3.73% of their portfolio | 226.1k $3.1m | Added +48.5k |
| Informed Momentum Co LLC 0.44% of their portfolio | 213.0k $2.9m | Added +4.4k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 206.8k $2.8m | Added +110.7k |
| Apis Capital Advisors, LLC 0.99% of their portfolio | 205.0k $2.8m | Added +22.0k |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 203.2k $2.8m | Reduced -13.8k |
| TUDOR INVESTMENT CORP ET AL 0.02% of their portfolio | 197.7k $2.7m | New |
| Jump Financial, LLC 0.03% of their portfolio | 197.5k $2.7m | Added +169.5k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 178.0k $2.4m | Added +106.7k |
| Private Wealth Advisors, LLC 0.90% of their portfolio | 168.6k $2.3m | Added +83.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 168.2k $2.3m | Added +117.1k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 153.6k $2.1m | Added +30.1k |
| ADAR1 Capital Management, LLC 0.33% of their portfolio | 149.4k $2.0m | Unchanged |
| CIBC WORLD MARKET INC. 0.00% of their portfolio | 146.6k $2.0m | Reduced -31.3k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 126.5k $1.7m | Reduced -26.3k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 119.3k $1.6m | Added +54.2k |
| Nuveen, LLC 0.00% of their portfolio | 118.9k $1.6m | New |
| Simplify Asset Management Inc. 0.09% of their portfolio | 106.6k $1.5m | Reduced -10.4k |
| SILVERARC CAPITAL MANAGEMENT, LLC 0.29% of their portfolio | 103.0k $1.4m | Reduced -88.4k |
| Trexquant Investment LP 0.02% of their portfolio | 102.6k $1.4m | New |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 98.4k $1.3m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 91.6k $1.2m | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 88.9k $1.2m | Added +75.8k |
| Man Group plc 0.00% of their portfolio | 88.5k $1.2m | Added +44.9k |
| Capital Advisors Wealth Management, LLC 0.16% of their portfolio | 76.0k $1.0m | Added +6.0k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 74.7k $1.0m | Reduced -482.7k |
| Engineers Gate Manager LP 0.01% of their portfolio | 69.0k $938.7k | Added +48.6k |
| GSA CAPITAL PARTNERS LLP 0.07% of their portfolio | 68.7k $934.0k | New |
| Bank of New York Mellon Corp 0.00% of their portfolio | 66.0k $898.1k | New |
| Verition Fund Management LLC 0.00% of their portfolio | 57.6k $783.1k | Added +10.0k |
| UBS Group AG 0.00% of their portfolio | 56.9k $773.7k | Added +24.0k |
| PRINCIPAL FINANCIAL GROUP INC 0.00% of their portfolio | 56.1k $762.5k | Reduced -61.6k |
| BARCLAYS PLC 0.00% of their portfolio | 53.8k $731.4k | Added +3.1k |
| BOOTHBAY FUND MANAGEMENT, LLC 0.02% of their portfolio | 47.0k $639.7k | Added +15.9k |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 46.9k $636.0k | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 43.1k $585.7k | New |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 42.8k $582.3k | New |
| Tripletail Wealth Management, LLC 0.60% of their portfolio | 41.2k $423.2k | First filing |
| GILDER GAGNON HOWE & CO LLC 0.00% of their portfolio | 33.1k $450.6k | Reduced -505.4k |
| Virtu Financial LLC 0.02% of their portfolio | 30.8k $419.0k | New |
| XTX Topco Ltd 0.02% of their portfolio | 29.4k $400.3k | New |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 28.4k $385.7k | New |
| Soleus Capital Management, L.P. 0.02% of their portfolio | 25.0k $340.0k | Reduced -207.7k |
| NOMURA HOLDINGS INC 0.00% of their portfolio | 23.8k $323.8k | New |
| Hunting Hill Global Capital, LLC 0.17% of their portfolio | 22.7k $308.3k | Added +8.6k |
| Squarepoint Ops LLC 0.00% of their portfolio | 22.2k $302.6k | Reduced -70.7k |
| Aristides Capital LLC 0.09% of their portfolio | 21.6k $293.8k | Unchanged |
| Quadrature Capital Ltd 0.00% of their portfolio | 20.9k $283.9k | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 20.0k $271.5k | New |
| OCCUDO QUANTITATIVE STRATEGIES LP 0.03% of their portfolio | 19.2k $261.2k | New |
| ALPS ADVISORS INC 0.00% of their portfolio | 18.8k $256.0k | New |
| MetLife Investment Management, LLC 0.00% of their portfolio | 18.7k $253.9k | New |
| Graham Capital Management, L.P. 0.01% of their portfolio | 18.6k $252.4k | Reduced -3.2k |
| WealthPlan Investment Management, LLC 0.02% of their portfolio | 17.4k $237.2k | Unchanged |
| Aquatic Capital Management LLC 0.00% of their portfolio | 17.2k $233.4k | New |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 16.8k $228.3k | Reduced -726 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 16.5k $224.4k | New |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 16.4k $222.4k | New |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 16.3k $222.0k | Added +6.3k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 15.8k $215.2k | Added +10.7k |
| CITIGROUP INC 0.00% of their portfolio | 15.5k $211.1k | Added +15.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 15.1k $206.0k | New |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 14.5k $196.9k | New |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 14.0k $190.4k | New |
| DRW Securities, LLC 0.01% of their portfolio | 13.6k $185.0k | New |
| Bayesian Capital Management, LP 0.03% of their portfolio | 13.3k $180.9k | New |
| Campbell & CO Investment Adviser LLC 0.01% of their portfolio | 11.9k $162.3k | New |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 11.1k $151.0k | New |
| Riverwater Partners LLC 0.07% of their portfolio | 11.0k $149.8k | Reduced -375 |
| LPL Financial LLC 0.00% of their portfolio | 10.9k $148.8k | New |
| LANARK FINANCIAL, INC. 0.01% of their portfolio | 10.0k $136.0k | Unchanged |
| Point72 Asset Management, L.P. 0.00% of their portfolio | 7.4k $100.1k | Added +460 |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 7.1k $96.6k | New |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 6.5k $88.0k | Added +3.0k |
| Legal & General Group Plc 0.00% of their portfolio | 3.4k $45.6k | New |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 3.1k $41.8k | New |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 2.9k $39.9k | New |
| STRS OHIO 0.00% of their portfolio | 2.4k $32.6k | New |
| Quarry LP 0.01% of their portfolio | 1.9k $25.7k | New |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 1.9k $25.6k | New |
| USA FINANCIAL FORMULAS 0.00% of their portfolio | 1.8k $24.9k | New |
| AlphaQuest LLC 0.00% of their portfolio | 1.8k $24.0k | Added +1.8k |
| AMALGAMATED BANK 0.00% of their portfolio | 1.0k $14.0k | New |