Skip to contentTappin Matthew — STEMCELLS INC insider: 62 transactions · InsiderLensTappin Matthew
- President, Software Products at STEMCELLS INC · on record since Jul 24, 2023
Insider trading activity of Tappin Matthew
- Transactions on record
- 62
- since Jan 3, 2024
- Open-market buys
- 0
- Open-market sells
- 21
- $428.5K
- Companies traded
- 1
- last filing Jul 2, 2026
Figures computed from official regulatory filings — methodology.
Companies where Tappin Matthew has traded
Track record of Tappin Matthew
Insufficient history for a statistical track record (fewer than 5 open-market buys).
Transaction history of Tappin Matthew
Co-insiders of Tappin Matthew
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Burell Scott RSTEMCELLS INC
| Company | Filed | Type | Qty | Price | Value · USD | Src |
|---|
| Jul 2, 2026 | Exercise | 2,750 | 7.81 USD | — | SEC |
| Jul 2, 2026 | ExerciseD | -2,750 | 0.00 USD | — | SEC |
| Jul 2, 2026 | Exercise | 5,000 | 7.81 USD | — | SEC |
| Jul 2, 2026 | ExerciseD | -5,000 | 0.00 USD | — | SEC |
| Jul 2, 2026 | Sell | -996 | 7.85 USD | — | SEC |
| Mar 13, 2026 | Sell | -402 | 10.83 USD | $4.4K | SEC |
| Mar 10, 2026 | Exercise | 1,458 | — | — | SEC |
| Mar 10, 2026 | ExerciseD | -1,458 | 0.00 USD | $0 | SEC |
| Mar 10, 2026 | Sell | -655 | 11.12 USD | $7.3K | SEC |
| Mar 4, 2026 | Sell | -300 | 9.67 USD | $2.9K | SEC |
| Mar 4, 2026 | Sell | -185 | 10.00 USD | $1.9K | SEC |
| Mar 2, 2026 | AwardD | 17,200 | 0.00 USD | $0 | SEC |
| Mar 2, 2026 | Exercise | 670 | — | — | SEC |
| Mar 2, 2026 | AwardD | 25,800 | 0.00 USD | $0 | SEC |
| Mar 2, 2026 | ExerciseD | -670 | 0.00 USD | $0 | SEC |
| Feb 23, 2026 | Sell | -366 | 11.40 USD | $4.2K | SEC |
| Feb 19, 2026 | Other | -522 | 11.30 USD | $5.9K | SEC |
| Feb 18, 2026 | Exercise | 1,253 | — | — | SEC |
| Feb 18, 2026 | ExerciseD | -1,253 | 0.00 USD | $0 | SEC |
| Nov 24, 2025 | Sell | -9,584 | 17.70 USD | $169.6K | SEC |
| Nov 12, 2025 | Other | -5,416 | 18.27 USD | $99K | SEC |
| Nov 12, 2025 | Exercise | 15,000 | — | — | SEC |
| Nov 12, 2025 | ExerciseD | -15,000 | 0.00 USD | $0 | SEC |
| Jul 30, 2025 | AwardD | 10,000 | 0.00 USD | $0 | SEC |
| Jul 30, 2025 | AwardD | 10,000 | 0.00 USD | $0 | SEC |