Tappin Matthew
CIK 1986259 · President, Software Products · last filed 2026-03-13
Tappin Matthew is a President, Software Products who has filed 26 SEC Form 4 insider transactions across 1 company since 2024. The most recent filing shows the insider sold $4.4K of STEM on Mar 13, 2026. Across all open-market trades the lifetime net is −$428.5K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $21.7K across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$21.7K
1
26
-$428.5K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| STEM | President, Software Products | 2,823 | $7.70 | $21.7K | -$428.5K | 26 | 2026-03-13 |
Recent Filings
26 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-13 | STEM | Sell (S) | −402 | -$4.4K | EDGAR |
| 2026-03-10 | STEM | Mixed | +803 | -$7.3K | EDGAR |
| 2026-03-04 | STEM | Sell (S) | −485 | -$4.8K | EDGAR |
| 2026-03-02 | STEM | Mixed | +670 | $0 | EDGAR |
| 2026-02-23 | STEM | Sell (S) | −366 | -$4.2K | EDGAR |
| 2026-02-19 | STEM | Tax (F) | −522 | -$5.9K | EDGAR |
| 2026-02-18 | STEM | Exer (M) | +1,253 | $0 | EDGAR |
| 2025-11-24 | STEM | Sell (S) | −9,584 | -$169.6K | EDGAR |
| 2025-11-12 | STEM | Mixed | +9,584 | -$99.0K | EDGAR |
| 2025-07-30 | STEM | Grant (A) | — | $0 | EDGAR |