Delcath Systems, Inc.: which funds bought and sold

Institutions that bought and sold Delcath Systems shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 68 institutions that filed 13F reports for both quarters added to or opened positions in Delcath Systems, and 46 cut or closed them. Together they added a net 1.1M shares, +6.8% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 479K shares (+21.0%); index fund managers were net buyers of 873K shares (+16.7%). 20 opened a new position and 20 sold out entirely.

Bought, Q2 2026 68 institutions, 20 of them new holders Sold, Q2 2026 46 institutions, 20 of them sold out

Net change, all compared +1.1M shares (+6.8%)

Net change, active managers +479K shares (+21.0%), 12 bought, 10 sold

Buyers versus sellers

institutions compared, 140

68 bought 26 46 sold

Active managers and hedge funds 12 bought · 10 sold · +479K

Index fund managers 7 bought · 2 sold · +873K

Other institutions 49 bought · 34 sold · −244K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	+922K +51.7%	2.7M	$34.1M
Algert Global LLC Hedge fund	+435K +298.5%	581K	$7.3M
Exoduspoint Capital Management, LP Hedge fund	+324K +900.6%	360K	$4.5M
Dimensional Fund Advisors LP	+210K New position	210K	$2.6M
AQR Capital Management LLC Hedge fund	+141K +439.0%	173K	$2.2M
HSBC Holdings PLC	+136K New position	136K	$1.7M
Jump Financial, LLC	+88K New position	88K	$1.1M
Nuveen, LLC	+78K +75.0%	182K	$2.3M
Barclays PLC	+70K +185.2%	108K	$1.4M
Gsa Capital Partners LLP	+70K +435.0%	86K	$1.1M
Russell Investments Group, Ltd.	+65K +2498.2%	68K	$851,813
Fox Run Management, L.L.C.	+62K New position	62K	$776,526
D. E. Shaw & Co., Inc. Hedge fund	+58K New position	58K	$728,885
Quantbot Technologies LP Hedge fund	+50K +540.4%	60K	$749,860
BNP Paribas Financial Markets	+45K +342.9%	58K	$725,864
Geode Capital Management, LLC Index funds	+41K +5.9%	733K	$9.2M
Marshall Wace, LLP Hedge fund	+27K +14.3%	219K	$2.8M
Man Group PLC Hedge fund	+26K +25.7%	128K	$1.6M
Xcelsior Advisor Partners LLC	+25K New position	25K	$318,527
Morgan Stanley	+22K +5.8%	408K	$5.1M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Algert Global LLC Hedge fund	+435K +298.5%	581K	$7.3M
Exoduspoint Capital Management, LP Hedge fund	+324K +900.6%	360K	$4.5M
AQR Capital Management LLC Hedge fund	+141K +439.0%	173K	$2.2M
D. E. Shaw & Co., Inc. Hedge fund	+58K New position	58K	$728,885
Quantbot Technologies LP Hedge fund	+50K +540.4%	60K	$749,860
Marshall Wace, LLP Hedge fund	+27K +14.3%	219K	$2.8M
Man Group PLC Hedge fund	+26K +25.7%	128K	$1.6M
American Century Companies Inc Active manager	+18K +147.2%	30K	$378,380
Alliancebernstein L.P. Active manager	+12K +84.3%	26K	$239,424
Schonfeld Strategic Advisors LLC Hedge fund	+10K New position	10K	$131,136

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Private Wealth Advisors, LLC	−281K −47.4%	311K	$3.9M
Ikarian Capital, LLC	−246K −56.9%	186K	$2.3M
Royce & Associates LP Active manager	−195K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−155K Sold out	0	—
Jane Street Group, LLC	−128K Sold out	0	—
Propel Bio Management, LLC	−108K −11.0%	871K	$11M
Vanguard Capital Management LLC Index funds	−108K −8.1%	1.2M	$15.4M
Trexquant Investment LP Hedge fund	−104K Sold out	0	—
Citadel Advisors LLC Hedge fund	−62K −80.5%	15K	$189,391
Boothbay Fund Management, LLC Hedge fund	−57K −69.0%	25K	$319,484
Lane Generational LLC	−55K −27.0%	150K	$1.9M
Mariner, LLC	−40K Sold out	0	—
Goldman Sachs Group Inc	−39K −13.4%	250K	$3.2M
Aquatic Capital Management LLC	−36K Sold out	0	—
Susquehanna International Group, LLP	−35K Sold out	0	—
Diametric Capital, LP	−34K −21.5%	123K	$1.5M
Allspring Global Investments Holdings, LLC	−32K Sold out	0	—
UBS Group AG	−27K −39.7%	42K	$525,179
CIBC World Market Inc.	−27K −14.0%	163K	$2.1M
Xtx Topco Ltd	−25K Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Royce & Associates LP Active manager	−195K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−155K Sold out	0	—
Trexquant Investment LP Hedge fund	−104K Sold out	0	—
Citadel Advisors LLC Hedge fund	−62K −80.5%	15K	$189,391
Boothbay Fund Management, LLC Hedge fund	−57K −69.0%	25K	$319,484
Millennium Management LLC Hedge fund	−22K −3.7%	566K	$7.1M
Magnetar Financial LLC Hedge fund	−15K Sold out	0	—
Balyasny Asset Management L.P. Hedge fund	−10K −26.1%	28K	$358,412
Tudor Investment Corp Et Al Hedge fund	−9,976 −45.3%	12K	$151,609
Kennedy Capital Management LLC Active manager	−3,780 −1.8%	204K	$2.6M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Dimensional Fund Advisors LP	210K	$2.6M
HSBC Holdings PLC	136K	$1.7M
Jump Financial, LLC	88K	$1.1M
Fox Run Management, L.L.C.	62K	$776,526
D. E. Shaw & Co., Inc.Hedge fund	58K	$728,885
Xcelsior Advisor Partners LLC	25K	$318,527
Mercer Global Advisors Inc	11K	$140,744
Schonfeld Strategic Advisors LLCHedge fund	10K	$131,136
Two Sigma Investments, LPHedge fund	10K	$126,580
Persistent Asset Partners Ltd	4,206	$52,954

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Royce & Associates LPActive manager	195K	$1.8M
Renaissance Technologies LLCHedge fund	155K	$1.4M
Jane Street Group, LLC	128K	$1.2M
Trexquant Investment LPHedge fund	104K	$966,512
Mariner, LLC	40K	$366,877
Aquatic Capital Management LLC	36K	$337,263
Susquehanna International Group, LLP	35K	$329,069
Allspring Global Investments Holdings, LLC	32K	$306,053
Xtx Topco Ltd	25K	$232,520
Prelude Capital Management, LLC	24K	$225,467

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 120
Ten largest holders: 66.4%
Index fund managers: 34.9%
Active managers and hedge funds: 15.8%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	12	10	3	4	+479K	+21.0%
Index fund managers	7	2	0	0	+873K	+16.7%
Other institutions	49	34	17	16	−244K	−2.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Delcath Systems.

Only managers that filed a holdings report for both quarters are compared (140 here). 1 other holder is left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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