MARK A ALEXANDER
CIK 1212607 · Chief Executive Officer · last filed 2026-06-02
MARK A ALEXANDER is a Chief Executive Officer who has filed 93 SEC Form 4 insider transactions across 5 companies since 2007. The most recent filing shows the insider was granted $31.2K of BLDR on Jun 2, 2026. Across all open-market trades the lifetime net is +$2.0M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $30.7M 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.
$30.68M
5
93
$2.02M
Holdings By Company
| 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
93 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-02 | BLDR | Grant (A) | +409 | $31.2K | EDGAR |
| 2026-05-18 | BLDR | Grant (A) | +2,558 | $0 | EDGAR |
| 2026-03-03 | BLDR | Grant (A) | +299 | $31.2K | EDGAR |
| 2025-12-03 | BLDR | Grant (A) | +278 | $31.2K | EDGAR |
| 2025-10-03 | WPC | Grant (A) | +438 | $30.0K | EDGAR |
| 2025-09-03 | BLDR | Grant (A) | +225 | $31.2K | EDGAR |
| 2025-07-02 | WPC | Grant (A) | +3,254 | $30.0K | EDGAR |
| 2025-06-03 | BLDR | Grant (A) | +290 | $31.2K | EDGAR |
| 2025-05-29 | BLDR | Grant (A) | +1,707 | $0 | EDGAR |
| 2025-04-03 | WPC | Grant (A) | +475 | $29.9K | EDGAR |