Delcath Systems, Inc.
Delcath Systems, Inc. (DCTH) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · DCTH · as of Sep 30, 2025
Ownership Breakdown
132
Institutional Holders
▲ 9 vs Q2
$192.23M
Total Inst. Value
▼ $45.24M vs Q2
34.52M
Shares Outstanding
freeFloat 82.85%
18.11M
13F Shares Held
▼ 234,390 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
DCTH largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ROSALIND ADVISORS, INC. surgical & medical instruments & apparatus | 3.30M | 9.22% | 9.22% | $33.00B | Nov 13, 2025 | — held |
BLACKROCK, INC. surgical & medical instruments & apparatus | 1.77M | 4.94% | 4.94% | $19.02B | Nov 12, 2025 | ▲ 51.8K |
VANGUARD GROUP INC surgical & medical instruments & apparatus | 1.66M | 4.63% | 4.63% | $17.82B | Nov 7, 2025 | ▲ 46.7K |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 687.6K | 1.92% | 1.92% | $7.39B | Nov 12, 2025 | ▼ 15.6K |
NANTAHALA CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 666.4K | 1.86% | 1.86% | $7.16B | Nov 14, 2025 | NEW |
STATE STREET CORP surgical & medical instruments & apparatus | 621.3K | 1.74% | 1.74% | $6.68B | Nov 14, 2025 | ▲ 147.4K |
VIVO CAPITAL, LLC surgical & medical instruments & apparatus | 569.5K | 1.59% | 1.59% | $6.12B | Nov 14, 2025 | — held |
DIVISADERO STREET CAPITAL MANAGEMENT, LP surgical & medical instruments & apparatus | 476.2K | 1.33% | 1.33% | $5.12B | Nov 14, 2025 | NEW |
CITADEL ADVISORS LLC surgical & medical instruments & apparatus | 449.3K | 1.26% | 1.26% | $4.83B | Nov 14, 2025 | ▼ 353.9K |
PROPEL BIO MANAGEMENT, LLC surgical & medical instruments & apparatus | 438.5K | 1.23% | 1.23% | $4.71B | Nov 12, 2025 | ▲ 212.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
29
Increased
+2.30M shares4
New Positions
first time holders14
Decreased
−1.09M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.21M
+2.30M / −1.09M
Net new holders
+19
4 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
DCTH insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
5
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Sylvester John Richard director | May 13, 2026 | Award | 22,500 | $11.61 | $261.2K | 22.5K | Form 4 ↗ |
Martell Bridget A director | May 13, 2026 | Award | 22,500 | $11.61 | $261.2K | 22.5K | Form 4 ↗ |
CZEREPAK ELIZABETH director | May 13, 2026 | Award | 22,500 | $11.61 | $261.2K | 22.5K | Form 4 ↗ |
SALAMON STEVEN A J director | May 13, 2026 | Award | 22,500 | $11.61 | $261.2K | 22.5K | Form 4 ↗ |
Aharon Gil director | May 13, 2026 | Award | 22,500 | $11.61 | $261.2K | 22.5K | Form 4 ↗ |
Pennell Sandra Chief Financial Officer | Mar 6, 2026 | Purchase | 5,533 | $9.04 | $50.0K | 77.0K | Form 4 ↗ |
MICHEL GERARD J CHIEF EXECUTIVE OFFICER | Mar 2, 2026 | Purchase | 11,200 | $8.96 | $100.3K | 342.0K | Form 4 ↗ |
Hoffman David L. GEN'L COUNSEL, CCO & SECY | Feb 17, 2026 | Award | 56,500 | $9.40 | $531.1K | 56.5K | Form 4 ↗ |
Hoffman David L. GEN'L COUNSEL, CCO & SECY | Feb 17, 2026 | Award | 28,250 | — | — | 28.3K | Form 4 ↗ |
Muir Kevin GM INTERVENTIONAL ONCOLOGY | Feb 17, 2026 | Award | 56,500 | $9.40 | $531.1K | 56.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Delcath Systems, Inc. (DCTH) is primarily owned by institutional investors, who hold approximately 52.5% of total shares outstanding. Company insiders own approximately 17.15%, while retail and public investors account for the remaining 30.39%.
The largest institutional shareholder of Delcath Systems, Inc. is ROSALIND ADVISORS, INC., holding approximately 3.30 million shares — equal to 9.22% of outstanding shares — as of September 30, 2025.
A total of 132 institutional investors currently hold DCTH stock, with a combined institutional value of approximately $192,233,295 as of the most recent 13F filing period.
Frequently asked questions
DCTH ownershipDelcath Systems, Inc. (DCTH) is primarily owned by institutional investors, who hold approximately 52.5% of shares. The largest shareholder is ROSALIND ADVISORS, INC. with a 9.22% stake. Company insiders hold 17.15%. Data sourced from SEC Form 13F as of September 30, 2025.