MARTIN J. VANDERPLOEG
CIK 1014008 · CEO · last filed 2026-06-03
"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
$49.94M
Companies
1
Total Filings
70
Lifetime Open-Market Net
-$348.41M
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 |
|---|---|---|---|---|---|---|---|
| WK | Director | 728,090 | $68.59 | $49.94M | -$348.41M | 70 | 2026-06-03 |
Recent Filings · Page 4 of 7
70 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 |
|---|---|---|---|---|---|
| 2021-08-11 | WK | Mixed | −130,000 | -$93.08M | EDGAR |
| 2021-07-21 | WK | Sell (S) | −35,000 | -$4.29M | EDGAR |
| 2021-06-28 | WK | Conv (C) | +150,000 | $0 | EDGAR |
| 2021-06-22 | WK | Mixed | −35,000 | -$3.80M | EDGAR |
| 2021-02-04 | WK | Tax (F) | −7,337 | -$755.1K | EDGAR |
| 2021-02-03 | WK | Mixed | +91,654 | $4.22M | EDGAR |
| 2020-12-22 | WK | Sell (S) | −25,000 | -$2.22M | EDGAR |
| 2020-11-24 | WK | Sell (S) | −25,000 | -$1.84M | EDGAR |
| 2020-11-06 | WK | Conv (C) | +50,000 | $0 | EDGAR |
| 2020-10-23 | WK | Mixed | −25,000 | -$1.38M | 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.