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 2 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 |
|---|---|---|---|---|---|
| 2025-01-06 | BTU | Mixed | +15,551 | -$99.0K | EDGAR |
| 2024-12-06 | BTU | Grant (A) | +84 | $1.9K | EDGAR |
| 2024-11-08 | BTU | Sell (S) | −10,000 | -$295.2K | EDGAR |
| 2024-11-06 | BTU | Notice (144) | −10,000 | -$295.2K | EDGAR |
| 2024-09-06 | BTU | Grant (A) | +88 | $1.9K | EDGAR |
| 2024-06-07 | BTU | Grant (A) | +82 | $1.9K | EDGAR |
| 2024-03-15 | BTU | Grant (A) | +76 | $1.9K | EDGAR |
| 2024-02-23 | BTU | Notice (144) | −6,826 | -$167.7K | EDGAR |
| 2024-02-23 | BTU | Mixed | +6,826 | -$435.9K | EDGAR |
| 2024-01-11 | BTU | Sell (S) | −4,827 | -$120.4K | 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.