Catalyst Pharmaceuticals's top three insider shareholders as of August 29, 2026 are Patrick J Mcenany (President And Ceo, 4.98Mn shares), Patrick J Mcenany (President And Ceo, 4.15Mn shares), Steve Miller (Chief Op. Scientific Officer, 1.09Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Patrick J Mcenany | President And Ceo | 9,128,694 | 0 | 9,128,694 | 66.5% | 03 Dec, 2025 |
| 2 | Steve Miller | Chief Op. Scientific Officer | 1,855,527 | 0 | 1,855,527 | 13.5% | 30 Dec, 2025 |
| 3 | Charles B O'Keeffe | Director | 1,348,861 | 0 | 1,348,861 | 9.8% | 19 Feb, 2025 |
| 4 | Philip H Coelho | Director | 444,440 | 0 | 444,440 | 3.2% | 05 May, 2023 |
| 5 | Brian Elsbernd | Chief Compliance/Legal Officer | 366,934 | 0 | 366,934 | 2.7% | 30 Dec, 2025 |
| 6 | Richard J Daly | President And Ceo | 226,794 | 0 | 226,794 | 1.7% | 28 Aug, 2025 |
| 7 | Alicia Grande | Vp, Treasurer And Cfo | 146,370 | 0 | 146,370 | 1.1% | 29 Dec, 2023 |
| 8 | Gary Ingenito | Chief Med. Reg. Officer | 137,746 | 0 | 137,746 | 1.0% | 15 May, 2025 |
| 9 | Preethi Sundaram | Chief Strategy Officer | 54,804 | 0 | 54,804 | 0.4% | 30 Dec, 2025 |
| 10 | Michael Wayne Kalb | Executive Vice President Cfo | 13,665 | 0 | 13,665 | 0.1% | 06 Jan, 2026 |
| 11 | Molly Harper | Director | 6,054 | 0 | 6,054 | 0.0% | 30 Dec, 2025 |
| 12 | Tamar Thompson | Director | 3,773 | 0 | 3,773 | 0.0% | 10 Dec, 2025 |
| 13 | Gregg Russo | Chief Hr Officer | 476 | 0 | 476 | 0.0% | 19 Feb, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 15 Jul, 2026 | William T. Andrews | Chief Medical Officer | Disposed D | 2,309 | $31.50 | $72.73K | 0 | Direct |
| 15 Jul, 2026 | Daniel J. Curran | Director | Disposed D | 40,000 | $0.00 | $0 | 0 | Direct |
| 15 Jul, 2026 | Donald A Denkhaus | Director | Disposed D | 498,773 | $31.50 | $15.71Mn | 0 | Direct |
| 15 Jul, 2026 | Molly Harper | Director | Disposed D | 3,694 | $31.50 | $116.36K | 0 | Direct |
| 15 Jul, 2026 | Michael Wayne Kalb | Chief Financial Officer | Disposed D | 13,665 | $31.50 | $430.45K | 0 | Direct |
| 15 Jul, 2026 | Tamar Thompson | Director | Disposed D | 3,773 | $31.50 | $118.85K | 0 | Direct |
| 15 Jul, 2026 | Richard J Daly | President And Ceo | Disposed D | 271,266 | $31.50 | $8.54Mn | 0 | Direct |
| 15 Jul, 2026 | David S Tierney | Director | Disposed D | 383,314 | $31.50 | $12.07Mn | 0 | Direct |
| 15 Jul, 2026 | Patrick J Mcenany | Director, Other | Disposed D | 4,171,559 | $31.50 | $131.40Mn | 0 | Direct |
| 15 Jul, 2026 | Carmen Jeffrey Del | Chief Commercial Officer | Disposed D | 14,337 | $31.50 | $451.62K | 0 | Direct |
| 15 Jul, 2026 | Gregg Russo | Chief Hr Officer | Disposed D | 476 | $31.50 | $14.99K | 0 | Direct |
| 15 Jul, 2026 | Preethi Sundaram | Chief Strategy Officer | Disposed D | 54,804 | $31.50 | $1.73Mn | 0 | Direct |
| 15 Jul, 2026 | Steve Miller | Chief Op. Scientific Officer | Disposed D | 1,093,803 | $31.50 | $34.45Mn | 0 | Direct |
| 15 Jul, 2026 | Brian Elsbernd | Chief Legal Officer | Disposed D | 242,501 | $31.50 | $7.64Mn | 0 | Direct |
| 15 Jul, 2026 | Brian Elsbernd | Chief Legal Officer | Disposed D | 132,000 | $0.00 | $0 | 0 | Direct |
| 15 Jul, 2026 | Gregg Russo | Chief Hr Officer | Disposed D | 15,000 | $0.00 | $0 | 0 | Direct |
| 15 Jul, 2026 | Richard J Daly | President And Ceo | Disposed D | 33,500 | $0.00 | $0 | 0 | Direct |
| 15 Jul, 2026 | Michael Wayne Kalb | Chief Financial Officer | Disposed D | 257,214 | $0.00 | $0 | 0 | Direct |
| 15 Jul, 2026 | Patrick J Mcenany | Director, Other | Disposed D | 740,000 | $0.00 | $0 | 0 | Direct |
| 15 Jul, 2026 | William T. Andrews | Chief Medical Officer | Disposed D | 124,447 | $0.00 | $0 | 0 | Direct |