Joanna Horobin serves as Executive at Verastem, Inc., where they oversee executive responsibilities. Since joining the company, Joanna Horobin has executed 14 insider transactions totaling $423.8K, demonstrating a bearish approach to their equity position. Their most recent transaction on Aug 19, 2025 involved selling 5,000 shares valued at $135.8K.
Joanna Horobin currently holds 33,755 shares of Verastem, Inc. (VSTM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Joanna Horobin has been a net seller of VSTM stock. They have purchased $7.5K and sold $416.3K worth of shares.
Joanna Horobin's most recent insider trade was on Aug 19, 2025, when they sold 5,000 shares at $27.17 per share.
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| $N/A |
| Discretionary |
| Jun 7, 2024 | KYMR | $209.0K | Sale | 6,313 | $33.11 | Planned |
| Jun 7, 2024 | KYMR | $17.7K | Option Exercise | 8,500 | $2.08 | Planned |
| Jun 7, 2024 | KYMR | $71.4K | Sale | 2,187 | $32.65 | Planned |
| Jan 17, 2023 | VYNT | $0 | Award | 7,526 | $N/A | Discretionary |
| Oct 17, 2022 | VYNT | $0 | Award | 14,285 | $N/A | Discretionary |
| Jul 18, 2022 | VYNT | $0 | Award | 8,092 | $N/A | Discretionary |
| Apr 18, 2022 | VYNT | $0 | Award | 6,796 | $N/A | Discretionary |
| Mar 30, 2022 | VYNT | $0 | Award | 43,478 | $N/A | Discretionary |
| Jan 18, 2022 | VYNT | $7.0K | Award | 5,343 | $1.31 | Discretionary |
| Jan 3, 2019 | IDRA | $0 | Award | 18,100 | $N/A | Discretionary |
| Dec 20, 2018 | IDRA | $1.0K | Purchase | 300 | $3.45 | Discretionary |
| Dec 29, 2014 | VSTM | $6.5K | Purchase | 750 | $8.60 | Discretionary |