MARK A ALEXANDER
CIK 1212607 · Chief Executive Officer · last filed 2026-06-02
"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
$30.68M
Companies
5
Total Filings
93
Lifetime Open-Market Net
$2.02M
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.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| BLDR | Director | 47,913 | $77.77 | $3.73M | $0 | 30 | 2026-06-02 |
| WPC | Director | 51,095 | $76.71 | $3.92M | $1.55M | 23 | 2025-10-03 |
| BMC STOCK HOLDINGS, INC. (BMCH) Delisted | Director | 0 | — | — | $0 | 5 | 2021-01-05 |
| KAYDON CORP (KDN) Delisted | Director | 22,956 | — | — | $464.1K | 33 | 2013-10-02 |
| SPH | Chief Executive Officer | 1,289,912 | $17.86 | $23.04M | $0 | 1 | 2008-12-15 |
Recent Filings · Page 4 of 10
93 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2023-03-03 | BLDR | Grant (A) | +306 | $26.2K | EDGAR |
| 2022-12-05 | BLDR | Grant (A) | +411 | $26.2K | EDGAR |
| 2022-09-06 | BLDR | Grant (A) | +446 | $26.2K | EDGAR |
| 2022-07-06 | WPC | Grant (A) | +1,919 | $0 | EDGAR |
| 2022-06-16 | BLDR | Grant (A) | +2,722 | $0 | EDGAR |
| 2022-06-03 | BLDR | Grant (A) | +411 | $26.2K | EDGAR |
| 2022-03-03 | BLDR | Grant (A) | +359 | $26.2K | EDGAR |
| 2021-12-03 | BLDR | Grant (A) | +373 | $26.2K | EDGAR |
| 2021-09-03 | BLDR | Grant (A) | +489 | $26.2K | EDGAR |
| 2021-07-06 | WPC | Grant (A) | +2,141 | $0 | 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.