Alex Spiro

Alex Spiro: Director at MasTec. What Alex Spiro holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.

MasTec (MTZ)

Alex Spiro holds 139 MasTec shares (0.00% of the company), worth about $26,049.99 at the last price, according to the Form 4 of Aug 14, 2026.

• Shares held: 139 (0.00%), $26,049.99 — Held in their own name.

Declarations

• MasTec (MTZ) — Form 4 of Aug 14, 2026: grant or award of 139; 139 shares after 0000015615-26-000109
• MasTec (MTZ) — Form 3 of Jul 24, 2026; 0 shares after 0000015615-26-000099

Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.

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