Rosalind Advisors reported 6,692,491 Delcath Systems shares in Schedule 13D/A

What did Rosalind Advisors file?

The SEC Schedule 13D is a Schedule 13D/A filed by Rosalind Advisors, Inc. on Oct 19, 2026. It reports 6,692,491 shares, equal to 9.9% of the class of Delcath Systems (DCTH).

The filing places Rosalind Advisors’ reported stake on the public record. The figures describe the ownership reported in the amendment; the filing date is not a reported date for when the shares were bought.

When was the filing made?

The filing was made 68 days after Delcath Systems’ results announcement on Aug 6, 2026. The announcement was recorded as an 8-K Item 2.02.

That timing gives a reference point for the filing alongside the company’s reported results announcement. The fact pack does not provide details of the results themselves, or say that the results announcement explains the ownership reported in the amendment.

What do short-interest records show?

FINRA short interest for DCTH was 1,947,041 shares on the settlement date of Sep 30, 2026. The figure was -15.78% on the previous report and amounted to about 5.37 days of average volume.

Short interest is a separate public record from Rosalind Advisors’ Schedule 13D/A. The short-interest figures describe the reported short-interest measure on the stated settlement date; they do not identify when Rosalind Advisors acquired shares or explain the reported ownership stake.

What do the 13F filings show?

In 13F filings for the quarter ended Jun 30, 2026, Simplify Asset Management Inc. had the largest position that grew, increasing its position by 3,644 shares. Royce & Associates LP had the largest position that shrank and sold out. Kennedy Capital Management LLC reduced its position by 3,780 shares.

These 13F records cover a different reporting period and other filers. A 13F is a quarter-end snapshot with no trade date, so the records do not establish the dates of the reported changes.

How did DCTH shares move around the filing date?

DCTH closed at $15.32 on Oct 13, 2026, the last session on or before the filing date. From Sep 14, 2026 to Oct 13, 2026, the close moved from $16.44 to $15.32, a change of −6.8%.

From Oct 13, 2026 to Oct 19, 2026, the close moved from $15.32 to $14.37, a change of −6.2%. These prices are context around the filing date. More information about the company is available on Delcath Systems on OQRO.

What this does not tell you?

A Schedule 13D or 13G is an ownership filing, not a trade record; it does not say when shares were bought. The reported stake, the short-interest figures, the 13F snapshots and the share-price movements are distinct records, and the pack does not establish a connection among them.

The price moves are listed as context only. The filing does not explain them, and other news can move a price. This article describes public filings and is not investment advice.