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.
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Disclosed Exposure
$2.56M
Companies
1
Total Filings
84
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 | $74.23 | $2.56M | -$14.24M | 78 | 2026-03-31 |
Recent Filings · Page 4 of 9
84 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 |
|---|---|---|---|---|---|
| 2022-08-24 | WLK | Gift (G) | −572 | $0 | EDGAR |
| 2022-05-31 | WLK | Mixed | — | -$416.3K | EDGAR |
| 2022-03-16 | WLK | Gift (G) | −500 | $0 | EDGAR |
| 2022-03-15 | WLK | Mixed | +3,887 | -$303.3K | EDGAR |
| 2022-03-14 | WLK | Mixed | — | -$962.3K | EDGAR |
| 2022-03-10 | WLK | Sell (S) | −2,730 | -$315.5K | EDGAR |
| 2022-02-22 | WLK | Grant (A) | — | $0 | EDGAR |
| 2022-02-22 | WLK | Grant (A) | +6,446 | $0 | EDGAR |
| 2022-02-17 | WLK | Mixed | +2,906 | -$101.1K | EDGAR |
| 2021-08-16 | WLK | Grant (A) | — | $0 | 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.