Matthew Tappin
CIK 1986259 · President, Software Products · last filed 2026-07-02
"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.
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Disclosed Exposure
$41.7K
Companies
1
Total Filings
50
Lifetime Open-Market Net
-$436.4K
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| 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 · Page 4 of 5
50 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-05-30 | STEM | Sell (S) | −1,388 | -$1.8K | EDGAR |
| 2024-05-28 | STEM | Notice (144) | −1,388 | -$1.8K | EDGAR |
| 2024-05-28 | STEM | Grant (A) | — | $0 | EDGAR |
| 2024-05-28 | STEM | Exer (M) | +2,775 | $0 | EDGAR |
| 2024-03-20 | STEM | Sell (S) | −26,640 | -$48.5K | EDGAR |
| 2024-03-19 | STEM | Notice (144) | −26,640 | -$48.5K | EDGAR |
| 2024-03-12 | STEM | Sell (S) | −24,899 | -$54.5K | EDGAR |
| 2024-03-08 | STEM | Notice (144) | −24,899 | -$54.6K | EDGAR |
| 2024-03-07 | STEM | Sell (S) | −3,837 | -$9.2K | EDGAR |
| 2024-03-05 | STEM | Notice (144) | −3,837 | -$9.2K | EDGAR |
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.
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.