Matthew Tappin
CIK: 0001986259
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
STEM, INC.
Discretionary Trading P&L
Holdings
Transaction History (32 total)
- Jul 2, 2026STEM
STEM, INC.
Sale(S)Direct996 shares at avg. $7.85$8K - Jun 30, 2026STEM
STEM, INC.
Exercise(M)Direct5K shares at avg. $7.81$39K - Jun 30, 2026STEM
STEM, INC.
Exercise(M)Direct2.8K shares at avg. $7.81$21K - Mar 11, 2026STEM
STEM, INC.
Sale(S)Direct402 shares at avg. $10.83$4K - Mar 10, 2026STEM
STEM, INC.
Sale(S)Direct655 shares at avg. $11.12$7K - Mar 7, 2026STEM
STEM, INC.
Exercise(M)Direct1.5K shares- - Mar 4, 2026STEM
STEM, INC.
Sale(S)Direct185 shares at avg. $10.00$2K - Mar 3, 2026STEM
STEM, INC.
Sale(S)Direct300 shares at avg. $9.67$3K - Mar 1, 2026STEM
STEM, INC.
Exercise(M)Direct670 shares- - Feb 26, 2026STEM
STEM, INC.
Award(A)DirectRestricted Stock Unit
25.8K shares- - Feb 26, 2026STEM
STEM, INC.
Award(A)DirectPerformance Stock Unit
17.2K shares- - Feb 20, 2026STEM
STEM, INC.
Sale(S)Direct366 shares at avg. $11.40$4K - Feb 19, 2026STEM
STEM, INC.
Tax Payment(F)Direct522 shares at avg. $11.30$6K - Feb 15, 2026STEM
STEM, INC.
Exercise(M)Direct1.3K shares- - Nov 11, 2025STEM
STEM, INC.
Sale(S)Direct9.6K shares at avg. $17.70$170K - Nov 10, 2025STEM
STEM, INC.
Tax Payment(F)Direct5.4K shares at avg. $18.27$99K - Nov 7, 2025STEM
STEM, INC.
Exercise(M)Direct15K shares- - Jul 28, 2025STEM
STEM, INC.
Award(A)DirectRestricted Stock Unit
10K shares- - Jul 28, 2025STEM
STEM, INC.
Award(A)DirectPerformance Stock Unit
10K shares- - Jun 30, 2025STEM
STEM, INC.
Award(A)DirectStock Options
5.5K shares- - Jun 30, 2025STEM
STEM, INC.
Award(A)DirectRestricted Stock Unit
11K shares- - Jun 30, 2025STEM
STEM, INC.
Award(A)DirectPerformance Stock Unit
5.5K shares- - Jun 16, 2025STEM
STEM, INC.
Sale(S)Direct20.8K shares at avg. $0.45$9K - May 30, 2025STEM
STEM, INC.
Sale(S)Direct1.2K shares at avg. $0.45$524.964 - May 29, 2025STEM
STEM, INC.
Exercise(M)Direct2.8K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Jul 2, 2026 | STEM STEM, INC. | Sale(S) | 996 | $7.85 | $7,819 | Direct |
| Jun 30, 2026 | STEM STEM, INC. | Exercise(M) | 5,000 | $7.81 | $39,050 | Direct |
| Jun 30, 2026 | STEM STEM, INC. | Exercise(M) | 2,750 | $7.81 | $21,478 | Direct |
| Mar 11, 2026 | STEM STEM, INC. | Sale(S) | 402 | $10.83 | $4,354 | Direct |
| Mar 10, 2026 | STEM STEM, INC. | Sale(S) | 655 | $11.12 | $7,284 | Direct |
| Mar 7, 2026 | STEM STEM, INC. | Exercise(M) | 1,458 | - | $0 | Direct |
| Mar 4, 2026 | STEM STEM, INC. | Sale(S) | 185 | $10.00 | $1,850 | Direct |
| Mar 3, 2026 | STEM STEM, INC. | Sale(S) | 300 | $9.67 | $2,901 | Direct |
| Mar 1, 2026 | STEM STEM, INC. | Exercise(M) | 670 | - | $0 | Direct |
| Feb 26, 2026 | STEM STEM, INC. | Award(A) Restricted Stock Unit | 25,800 | - | - | Direct |
| Feb 26, 2026 | STEM STEM, INC. | Award(A) Performance Stock Unit | 17,200 | - | - | Direct |
| Feb 20, 2026 | STEM STEM, INC. | Sale(S) | 366 | $11.40 | $4,172 | Direct |
| Feb 19, 2026 | STEM STEM, INC. | Tax Payment(F) | 522 | $11.30 | $5,899 | Direct |
| Feb 15, 2026 | STEM STEM, INC. | Exercise(M) | 1,253 | - | $0 | Direct |
| Nov 11, 2025 | STEM STEM, INC. | Sale(S) | 9,584 | $17.70 | $169,637 | Direct |
| Nov 10, 2025 | STEM STEM, INC. | Tax Payment(F) | 5,416 | $18.27 | $98,950 | Direct |
| Nov 7, 2025 | STEM STEM, INC. | Exercise(M) | 15,000 | - | - | Direct |
| Jul 28, 2025 | STEM STEM, INC. | Award(A) Restricted Stock Unit | 10,000 | - | - | Direct |
| Jul 28, 2025 | STEM STEM, INC. | Award(A) Performance Stock Unit | 10,000 | - | - | Direct |
| Jun 30, 2025 | STEM STEM, INC. | Award(A) Stock Options | 5,500 | - | - | Direct |
| Jun 30, 2025 | STEM STEM, INC. | Award(A) Restricted Stock Unit | 11,000 | - | - | Direct |
| Jun 30, 2025 | STEM STEM, INC. | Award(A) Performance Stock Unit | 5,500 | - | - | Direct |
| Jun 16, 2025 | STEM STEM, INC. | Sale(S) | 20,823 | $0.45 | $9,370 | Direct |
| May 30, 2025 | STEM STEM, INC. | Sale(S) | 1,164 | $0.45 | $525 | Direct |
| May 29, 2025 | STEM STEM, INC. | Exercise(M) | 2,775 | - | - | Direct |
1-25 of 32 transactions
About Tappin Matthew
Tappin Matthew (SEC CIK 0001986259) files insider reports with the SEC as President, Software Products of STEM, INC. (STEM).
Signal8 holds 16 ownership filings by Tappin Matthew, all Form 4s, filed between Nov 1, 2024 and Jul 2, 2026. Those filings report 32 transactions, from Nov 1, 2024 to Jul 2, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Tappin Matthew's filings is in HOUSTON, TX.
Recent filings by Tappin Matthew
- Jul 2, 2026: Open-market sale of STEM shares (Form 4, code S).
- Jun 30, 2026: Option exercises of STEM shares (2 lines, Form 4, code M).
- Mar 11, 2026: Open-market sale of STEM shares (Form 4, code S).
- Mar 10, 2026: Open-market sale of STEM shares (Form 4, code S).
- Mar 7, 2026: Option exercise of STEM shares (Form 4, code M).
Other insiders filing for STEM, INC. (STEM)
- Carlson Michael James, President, Managed Services
- BUZBY DAVID S, Director
- Shivram Krishna, Director
- Daley Adam, Director
- Tammineedi Anil, Director
- Guruswamy Vasudevan, Director