CorMedix's top three insider shareholders as of September 09, 2026 are Joseph Todisco (Chief Executive Officer, 774.75K shares), Elizabeth Hurlburt (Chief Operating Officer, 270.46K shares), Kaufman Beth Zelnick (Chief Legal Officer, 269.11K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Joseph Todisco | Chief Executive Officer | 774,749 | 0 | 774,749 | 32.3% | 06 Feb, 2026 |
| 2 | Elizabeth Hurlburt | Chief Operating Officer | 270,463 | 0 | 270,463 | 11.3% | 01 Sep, 2026 |
| 3 | Kaufman Beth Zelnick | Chief Legal Officer | 260,684 | 0 | 260,684 | 10.9% | 01 Sep, 2026 |
| 4 | Myron Kaplan | Director | 231,487 | 0 | 231,487 | 9.6% | 27 Jan, 2026 |
| 5 | Michael David Seckler | Chief Commercial Officer | 133,156 | 0 | 133,156 | 5.5% | 15 Jan, 2026 |
| 6 | Steven W Lefkowitz | Director | 125,951 | 0 | 125,951 | 5.2% | 27 Jan, 2026 |
| 7 | Susan Blum | Chief Financial Officer | 124,315 | 0 | 124,315 | 5.2% | 01 Sep, 2026 |
| 8 | Erin Mistry | Evp, Chief Commercial Officer | 100,992 | 0 | 100,992 | 4.2% | 14 Jan, 2025 |
| 9 | Matthew T David | Chief Financial Officer | 95,270 | 0 | 95,270 | 4.0% | 14 Jan, 2025 |
| 10 | Alan W Dunton | Director | 70,703 | 0 | 70,703 | 2.9% | 27 Jan, 2026 |
| 11 | Janet Dillione | Director | 68,926 | 0 | 68,926 | 2.9% | 27 Jan, 2026 |
| 12 | Gregory Scott Duncan | Director | 68,786 | 0 | 68,786 | 2.9% | 27 Jan, 2026 |
| 13 | Robert A Stewart | Director | 66,453 | 0 | 66,453 | 2.8% | 27 Jan, 2026 |
| 14 | Paulo F Costa | Director | 10,000 | 0 | 10,000 | 0.4% | 18 May, 2023 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 29 Aug, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Disposed F | 8,424 | $8.30 | $69.92K | 260,684 | Direct |
| 29 Aug, 2026 | Susan Blum | Chief Financial Officer | Disposed F | 8,424 | $8.30 | $69.92K | 124,315 | Direct |
| 29 Aug, 2026 | Elizabeth Hurlburt | Chief Operating Officer | Disposed F | 8,076 | $8.30 | $67.03K | 270,463 | Direct |
| 04 Feb, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Acquired A | 36,006 | $0.00 | $0 | 269,108 | Direct |
| 04 Feb, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Acquired A | 36,006 | $0.00 | $0 | 269,108 | Direct |
| 04 Feb, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Acquired A | 36,006 | $0.00 | $0 | 269,108 | Direct |
| 04 Feb, 2026 | Joseph Todisco | Chief Executive Officer | Acquired A | 77,156 | $0.00 | $0 | 774,749 | Direct |
| 04 Feb, 2026 | Elizabeth Hurlburt | Chief Operating Officer | Acquired A | 36,006 | $0.00 | $0 | 278,539 | Direct |
| 04 Feb, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Acquired A | 36,006 | $0.00 | $0 | 269,108 | Direct |
| 26 Jan, 2026 | Janet Dillione | Director | Acquired A | 30,453 | $0.00 | $0 | 68,926 | Direct |
| 23 Jan, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Acquired A | 72,820 | $0.00 | $0 | 241,905 | Direct |
| 23 Jan, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Acquired A | 72,820 | $0.00 | $0 | 241,905 | Direct |
| 26 Jan, 2026 | Robert A Stewart | Director | Acquired A | 30,453 | $0.00 | $0 | 66,453 | Direct |
| 26 Jan, 2026 | Myron Kaplan | Director | Acquired A | 30,453 | $0.00 | $0 | 231,487 | Direct |
| 26 Jan, 2026 | Steven W Lefkowitz | Director | Acquired A | 30,453 | $0.00 | $0 | 125,951 | Direct |
| 26 Jan, 2026 | Steven W Lefkowitz | Director | Acquired A | 30,453 | $0.00 | $0 | 125,951 | Direct |
| 26 Jan, 2026 | Myron Kaplan | Director | Acquired A | 30,453 | $0.00 | $0 | 231,487 | Direct |
| 23 Jan, 2026 | Kaufman Beth Zelnick | Chief Legal Officer | Acquired A | 72,820 | $0.00 | $0 | 241,905 | Direct |
| 26 Jan, 2026 | Steven W Lefkowitz | Director | Acquired A | 30,453 | $0.00 | $0 | 125,951 | Direct |
| 26 Jan, 2026 | Myron Kaplan | Director | Acquired A | 30,453 | $0.00 | $0 | 231,487 | Direct |