Matthew Tappin
CIK 1986259 · President, Software Products · last filed 2026-07-02
Matthew Tappin is a President, Software Products who has filed 50 SEC Form 4 insider transactions across 1 company since 2024. The most recent filing, for STEM, was dated Jul 2, 2026. Across all open-market trades the lifetime net is −$436.4K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $41.7K 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.
$41.7K
1
50
-$436.4K
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| STEM | President, Software Products | 7,823 | $5.33 | $41.7K | -$436.4K | 27 | 2026-07-02 |
Recent Filings
50 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-07-02 | STEM | Mixed | +6,754 | $52.7K | EDGAR |
| 2026-07-02 | STEM | Notice (144) | −996 | -$7.7K | EDGAR |
| 2026-03-13 | STEM | Sell (S) | −402 | -$4.4K | EDGAR |
| 2026-03-11 | STEM | Notice (144) | −402 | -$4.4K | EDGAR |
| 2026-03-10 | STEM | Mixed | +803 | -$7.3K | EDGAR |
| 2026-03-10 | STEM | Notice (144) | −655 | -$7.3K | EDGAR |
| 2026-03-04 | STEM | Sell (S) | −485 | -$4.8K | EDGAR |
| 2026-03-04 | STEM | Notice (144) | −185 | -$1.9K | EDGAR |
| 2026-03-03 | STEM | Notice (144) | −300 | -$2.9K | EDGAR |
| 2026-03-02 | STEM | Mixed | +670 | $0 | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.