Citius Oncology's three largest insider shareholders as of September 09, 2026 are Myron Czuczman (Chief Medical Officer, 825.00K shares), Jaime Bartushak (Chief Financial Officer, 825.00K shares), Joel David Mayersohn (Director, 321.23K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Jaime Bartushak | Chief Financial Officer | 825,000 | 0 | 825,000 | 28.7% | 01 Dec, 2025 |
| 2 | Myron Czuczman | Chief Medical Officer | 825,000 | 0 | 825,000 | 28.7% | 01 Dec, 2025 |
| 3 | Joel David Mayersohn | Director | 321,228 | 0 | 321,228 | 11.2% | 01 Dec, 2025 |
| 4 | Carol Webb | Director | 300,000 | 0 | 300,000 | 10.4% | 01 Dec, 2025 |
| 5 | Eugene Myron Holuka | Director | 300,000 | 0 | 300,000 | 10.4% | 01 Dec, 2025 |
| 6 | Robert Joseph Smith | Director | 300,000 | 0 | 300,000 | 10.4% | 01 Dec, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 19 Sep, 2025 | Robert Joseph Smith | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Carol Webb | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Carol Webb | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Jaime Bartushak | Chief Financial Officer | Acquired A | 825,000 | $0.00 | $0 | 825,000 | Direct |
| 19 Sep, 2025 | Myron Czuczman | Chief Medical Officer | Acquired A | 825,000 | $0.00 | $0 | 825,000 | Direct |
| 19 Sep, 2025 | Carol Webb | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Joel David Mayersohn | Director | Acquired A | 300,000 | $0.00 | $0 | 321,228 | Direct |
| 19 Sep, 2025 | Robert Joseph Smith | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Eugene Myron Holuka | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Eugene Myron Holuka | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Myron Czuczman | Chief Medical Officer | Acquired A | 825,000 | $0.00 | $0 | 825,000 | Direct |
| 19 Sep, 2025 | Myron Czuczman | Chief Medical Officer | Acquired A | 825,000 | $0.00 | $0 | 825,000 | Direct |
| 19 Sep, 2025 | Robert Joseph Smith | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Eugene Myron Holuka | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Robert Joseph Smith | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Carol Webb | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Robert Joseph Smith | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Eugene Myron Holuka | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Eugene Myron Holuka | Director | Acquired A | 300,000 | $0.00 | $0 | 300,000 | Direct |
| 19 Sep, 2025 | Myron Czuczman | Chief Medical Officer | Acquired A | 825,000 | $0.00 | $0 | 825,000 | Direct |