Ernst N. Csiszar
Ernst N. Csiszar: Director at MasTec. What Ernst N. Csiszar 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)
Ernst N. Csiszar holds 10,934 MasTec shares (0.01% of the company), worth about $2.3M at the last price, according to the Form 4 of Aug 14, 2026.
- Shares held: 10,934 (0.01%), $2.3M — Held in their own name.
Declarations
- MasTec (MTZ) — Form 4 of Aug 14, 2026: grant or award of 152; shares withheld for tax of 34 at $297.59; 10,934 shares after 0000015615-26-000111
- MasTec (MTZ) — Form 4 of Jun 3, 2026: open-market sale of 6,500 at $371.17; 10,816 shares after 0000015615-26-000067
- MasTec (MTZ) — Form 4 of May 15, 2026: grant or award of 104; shares withheld for tax of 23 at $434.77; 17,316 shares after 0000015615-26-000065
- MasTec (MTZ) — Form 4 of Mar 3, 2026: open-market sale of 6,500 at $300.40; 17,235 shares after 0000015615-26-000022
- MasTec (MTZ) — Form 4 of Feb 13, 2026: grant or award of 168; shares withheld for tax of 37 at $269.53; 23,735 shares after 0000015615-26-000008
- MasTec (MTZ) — Form 4 of Nov 14, 2025: grant or award of 235; shares withheld for tax of 52 at $192.22; 23,604 shares after 0000015615-25-000140
- MasTec (MTZ) — Form 4 of Aug 15, 2025: grant or award of 254; shares withheld for tax of 56 at $178.00; 23,421 shares after 0000015615-25-000098
- MasTec (MTZ) — Form 4 of May 15, 2025: grant or award of 287; shares withheld for tax of 64 at $157.32; 23,223 shares after 0001628280-25-026608
- MasTec (MTZ) — Form 4 of Mar 24, 2025: open-market sale of 2,517 at $131.63; 23,000 shares after 0000015615-25-000039
- MasTec (MTZ) — Form 4 of Feb 14, 2025: grant or award of 332; shares withheld for tax of 74 at $135.78; 25,517 shares after 0000015615-25-000014
- MasTec (MTZ) — Form 4 of Nov 15, 2024: grant or award of 333; shares withheld for tax of 74 at $135.32; 25,259 shares after 0000015615-24-000125
- MasTec (MTZ) — Form 4 of Aug 22, 2024: open-market sale of 4,853 at $110.96; 25,000 shares after 0000015615-24-000090
- MasTec (MTZ) — Form 4 of Aug 15, 2024: grant or award of 407; shares withheld for tax of 90 at $110.78; 29,853 shares after 0000015615-24-000082
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.
All holders · Who owns each AI company · All tracked companies · The AI market