Mark Spurbeck
CIK 1577048 · EVP and CFO · last filed 2026-06-10
"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
$3.88M
Companies
3
Total Filings
61
Lifetime Open-Market Net
-$4.02M
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 7
61 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 |
|---|---|---|---|---|---|
| 2021-01-07 | BTU | Sell (S) | −837 | -$2.6K | EDGAR |
| 2021-01-05 | BTU | Mixed | +49,983 | -$7.4K | EDGAR |
| 2020-07-02 | BTU | Grant (A) | +27,200 | $0 | EDGAR |
| 2020-04-06 | BTU | Tax (F) | −1,660 | -$5.6K | EDGAR |
| 2020-02-05 | BTU | Grant (A) | +14,475 | $0 | EDGAR |
| 2018-01-22 | CDE | Tax (F) | −18,818 | -$156.8K | EDGAR |
| 2017-11-03 | CDE | Sell (S) | −15,000 | -$111.3K | EDGAR |
| 2017-09-19 | CDE | Sell (S) | −9,500 | -$87.9K | EDGAR |
| 2017-06-12 | CDE | Mixed | — | -$130.3K | EDGAR |
| 2017-01-23 | CDE | Tax (F) | −12,578 | -$143.5K | 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.