MARK K MASON
CIK 1396928 · CEO, President · last filed 2025-12-18
"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
$3.63M
Companies
3
Total Filings
51
Lifetime Open-Market Net
-$6.78M
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.
Recent Filings · Page 3 of 6
51 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 |
|---|---|---|---|---|---|
| 2019-03-11 | Mechanics Bancorp (HMST) Delisted | Mixed | +2,280 | -$39.5K | EDGAR |
| 2019-01-31 | Mechanics Bancorp (HMST) Delisted | Mixed | +1,754 | -$28.0K | EDGAR |
| 2019-01-29 | Mechanics Bancorp (HMST) Delisted | Mixed | +3,750 | -$65.3K | EDGAR |
| 2018-05-01 | Mechanics Bancorp (HMST) Delisted | Buy (P) | +200 | $5.1K | EDGAR |
| 2018-03-26 | Mechanics Bancorp (HMST) Delisted | Sell (S) | −2,208 | -$63.0K | EDGAR |
| 2018-03-15 | Mechanics Bancorp (HMST) Delisted | Mixed | +3,735 | -$45.3K | EDGAR |
| 2018-03-09 | Mechanics Bancorp (HMST) Delisted | Exer (M) | +3,760 | $0 | EDGAR |
| 2018-02-07 | Mechanics Bancorp (HMST) Delisted | Sell (S) | −6,934 | -$204.8K | EDGAR |
| 2018-02-02 | Mechanics Bancorp (HMST) Delisted | Sell (S) | −6,934 | -$204.8K | EDGAR |
| 2018-01-31 | Mechanics Bancorp (HMST) Delisted | Mixed | +9,245 | $0 | 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.