Alexander W. Casdin serves as Executive at DUSA PHARMACEUTICALS INC, where they oversee executive responsibilities. Since joining the company, Alexander W. Casdin has executed 20 insider transactions totaling $7.1M, demonstrating a bullish approach to their equity position. Their most recent transaction on Jan 1, 2026 involved receiving (via award) 23,872 shares valued at $0.
Alexander W. Casdin currently holds 23,872 shares of DUSA PHARMACEUTICALS INC (DUSA), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Alexander W. Casdin has been a net buyer of DUSA stock. They have purchased $7.1M and sold $0 worth of shares.
Alexander W. Casdin's most recent insider trade was on Jan 1, 2026, when they sold 23,872 shares at $0.00 per share.
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| $2.27 |
| Discretionary |
| Dec 4, 2023 | ERAS | $49.8K | Purchase | 30,000 | $1.66 | Discretionary |
| Jun 15, 2023 | SIEN | $0 | Award | 15,000 | $N/A | Discretionary |
| Apr 10, 2023 | ERAS | $55.2K | Purchase | 20,000 | $2.76 | Discretionary |
| Dec 15, 2022 | ERAS | $97.4K | Purchase | 20,000 | $4.87 | Discretionary |
| Jul 1, 2022 | ERAS | $0 | Other | 750,000 | $N/A | Discretionary |
| Jul 20, 2021 | ERAS | $0 | Conversion | 150,000 | $N/A | Discretionary |
| Jul 20, 2021 | ERAS | $0 | Conversion | 750,000 | $N/A | Discretionary |
| Feb 8, 2018 | RXDX | $19.1M | Disposition | 706,464 | $27.00 | Discretionary |
| Feb 8, 2018 | RXDX | $2.7M | Disposition | 100,000 | $27.00 | Discretionary |
| May 4, 2016 | RXDX | $1.4M | Purchase | 232,000 | $6.25 | Discretionary |
| Jun 16, 2015 | RXDX | $1.1M | Purchase | 65,714 | $17.50 | Discretionary |
| Mar 17, 2015 | RXDX | $4.1M | Purchase | 408,750 | $10.00 | Discretionary |
| Dec 20, 2012 | DUSA | $1.6M | Tender | 206,000 | $8.00 | Discretionary |
| Dec 20, 2012 | DUSA | $80.0K | Tender | 10,000 | $8.00 | Discretionary |
| Jun 30, 2012 | DUSA | $0 | Award | 8,000 | $N/A | Discretionary |
| Jun 30, 2011 | DUSA | $0 | Award | 8,000 | $N/A | Discretionary |
| May 18, 2009 | DUSA | $140.0K | Award | 100,000 | $1.40 | Discretionary |
| May 18, 2009 | DUSA | $140.0K | Award | 100,000 | $1.40 | Discretionary |