Jose Ramon Mas

What Jose Ramon Mas 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)

The Schedule 13D of Aug 11, 2026 counts 6.2M shares (7.7%) as Jose Ramon Mas's.

• Shares held: 3.3M (4.1%), $708.3M — Held through companies or funds (Jose Ramon Mas individually).
• Shares held: 1.3M (1.6%), $278.7M — Held through companies or funds (JRM Holdings I).
• Shares held: 848,941 (1.1%), $184.8M — Held through trusts.
• Shares held: 425,000 (0.53%), $92.5M — Held by a spouse or a family member.
• Shares held: 276,000 (0.34%), $60.1M — Held through companies or funds (Mas Partners III).
• Shares held: 100,000 (0.12%), $21.8M — Held by a foundation.

Declarations

• MasTec (MTZ) — 13D filed Aug 13, 2026: 6.2M shares counted as of Aug 11, 2026, 7.7% as declared
• MasTec (MTZ) — 13D filed Aug 22, 2025: 6.2M shares counted as of Aug 21, 2025, 7.8% as declared

Follow Jose Ramon Mas's SEC filings (Atom feed)

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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