Matthew Tappin serves as Executive at STEM, INC., where they oversee executive responsibilities. Since joining the company, Matthew Tappin has executed 19 insider transactions totaling $389.5K, demonstrating a bearish approach to their equity position. Their most recent transaction on Feb 20, 2026 involved selling 366 shares valued at $4.2K.
Matthew Tappin currently holds 2,237 shares of STEM, INC. (STEM), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Matthew Tappin has been a net seller of STEM stock. They have purchased $0 and sold $389.5K worth of shares.
Matthew Tappin's most recent insider trade was on Feb 20, 2026, when they sold 366 shares at $11.40 per share.
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| $11.30 |
| Discretionary |
| Nov 11, 2025 | STEM | $169.6K | Sale | 9,584 | $17.70 | Discretionary |
| Nov 10, 2025 | STEM | $99.0K | Payment | 5,416 | $18.27 | Discretionary |
| Nov 7, 2025 | STEM | $0 | Option Exercise | 15,000 | $N/A | Discretionary |
| May 28, 2024 | STEM | $1.8K | Sale | 1,388 | $1.32 | Planned |
| May 24, 2024 | STEM | $0 | Option Exercise | 2,775 | $N/A | Discretionary |
| Mar 19, 2024 | STEM | $48.5K | Sale | 26,640 | $1.82 | Discretionary |
| Mar 8, 2024 | STEM | $54.5K | Sale | 24,899 | $2.19 | Planned |
| Mar 5, 2024 | STEM | $9.2K | Sale | 3,837 | $2.41 | Planned |
| Mar 4, 2024 | STEM | $14.2K | Sale | 5,724 | $2.48 | Discretionary |
| Mar 1, 2024 | STEM | $0 | Award | 51,539 | $N/A | Discretionary |
| Mar 1, 2024 | STEM | $0 | Option Exercise | 13,398 | $N/A | Discretionary |
| Feb 20, 2024 | STEM | $20.9K | Sale | 6,857 | $3.05 | Discretionary |
| Feb 16, 2024 | STEM | $33.6K | Sale | 10,602 | $3.17 | Discretionary |
| Feb 15, 2024 | STEM | $0 | Option Exercise | 24,315 | $N/A | Discretionary |
| Feb 14, 2024 | STEM | $14.4K | Sale | 4,556 | $3.15 | Discretionary |
| Jan 3, 2024 | STEM | $18.5K | Sale | 5,207 | $3.56 | Discretionary |
| Dec 31, 2023 | STEM | $0 | Option Exercise | 14,318 | $N/A | Discretionary |