Insiders / Alexander Mark a
Alexander Mark a
CIK 1212607personinsider
Companies
1
First seen
Mar 3, 2026
Last activity
Jun 2, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Builders FirstSource Inc · BLDR | 47,913 | — |
All securities held
1 position · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Builders FirstSource Inc | Common Stock, par value $0.01 per share | 47,913 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Jun 1, 2026 | Grant | BLDR Builders FirstSource Inc Common Stock, par value $0.01 per share | $31.2K | +409 +0.86% | 47,913 0.04% of shares | low |
| Mar 1, 2026 | Grant | BLDR Builders FirstSource Inc Common Stock, par value $0.01 per share | $31.2K | +299 +0.67% | 44,946 0.04% of shares | low |
| May 14, 2026 | Grant | BLDR Builders FirstSource Inc Common Stock, par value $0.01 per share | $0 | +3K +5.69% | 47,504 0.04% of shares | low |