DOUGLAS T DIETRICH
CIK 1408736 · CHAIRMAN AND CEO · last filed 2026-05-28
"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
$15.80M
Companies
2
Total Filings
86
Lifetime Open-Market Net
-$8.98M
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 5 of 9
86 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2020-01-23 | MTX | Mixed | +4,583 | -$299.3K | EDGAR |
| 2020-01-21 | MTX | Mixed | +1,878 | -$135.9K | EDGAR |
| 2019-09-03 | MTX | Buy (P) | +1,500 | $72.0K | EDGAR |
| 2019-03-14 | MTX | Mixed | +333 | -$23.0K | EDGAR |
| 2019-01-24 | MTX | Mixed | +2,251 | -$137.8K | EDGAR |
| 2019-01-23 | MTX | Mixed | +2,052 | -$127.2K | EDGAR |
| 2019-01-22 | MTX | Mixed | +1,873 | -$124.1K | EDGAR |
| 2018-06-22 | MTX | Exer (M) | +4,328 | $325.5K | EDGAR |
| 2018-03-15 | MTX | Grant (A) | — | $0 | EDGAR |
| 2018-01-25 | MTX | Grant (A) | — | $0 | EDGAR |
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.