Robert F. Buesinger
CIK 1488587 · EVP, PEM Segment Head · last filed 2026-03-31
"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.
Loading insider history…
Disclosed Exposure
$3.05M
Companies
1
Total Filings
78
Lifetime Open-Market Net
-$14.24M
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 |
|---|---|---|---|---|---|---|---|
| WLK | EVP, PEM Segment Head | 34,482 | $88.50 | $3.05M | -$14.24M | 78 | 2026-03-31 |
Recent Filings · Page 2 of 8
78 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-03-18 | WLK | Sell (S) | −3,878 | -$560.4K | EDGAR |
| 2024-03-14 | WLK | Sell (S) | −122 | -$17.6K | EDGAR |
| 2024-03-11 | WLK | Mixed | — | -$544.3K | EDGAR |
| 2024-02-21 | WLK | Mixed | +8,390 | -$585.7K | EDGAR |
| 2024-02-20 | WLK | Grant (A) | — | $0 | EDGAR |
| 2023-11-17 | WLK | Sell (S) | −4,215 | -$550.1K | EDGAR |
| 2023-08-31 | WLK | Mixed | — | -$232.8K | EDGAR |
| 2023-08-30 | WLK | Mixed | — | -$550.9K | EDGAR |
| 2023-05-16 | WLK | Grant (A) | — | $0 | EDGAR |
| 2023-03-15 | WLK | Mixed | +6,546 | -$496.0K | 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.