Robert F. Buesinger
CIK 1488587 · EVP, PEM Segment Head · last filed 2026-03-31
Robert F. Buesinger is an EVP, PEM Segment Head who has filed 78 SEC Form 4 insider transactions across 1 company since 2010. The most recent filing shows the insider sold $461.0K of WLK on Mar 31, 2026. Across all open-market trades the lifetime net is −$14.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.1M across reported positions.
"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.
$3.05M
1
78
-$14.24M
Holdings By Company
| 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
78 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-03-31 | WLK | Sell (S) | −4,000 | -$461.0K | EDGAR |
| 2026-02-23 | WLK | Mixed | +975 | -$30.7K | EDGAR |
| 2026-02-19 | WLK | Mixed | +2,575 | -$89.4K | EDGAR |
| 2025-06-09 | WLK | Mixed | — | $1.7K | EDGAR |
| 2025-04-15 | WLK | Grant (A) | — | $0 | EDGAR |
| 2025-02-24 | WLK | Mixed | +4,101 | -$302.7K | EDGAR |
| 2025-02-20 | WLK | Mixed | +8,908 | -$447.7K | EDGAR |
| 2024-08-15 | WLK | Mixed | +4,279 | -$403.2K | EDGAR |
| 2024-05-13 | WLK | Sell (S) | −3,500 | -$554.8K | EDGAR |
| 2024-05-08 | WLK | Mixed | — | -$109.2K | EDGAR |