Alberto De Cardenas

Currently holds a position at MasTec Inc

1.4

1.4

Position	Company	Period
Executive Vice President, General Counsel, Secretary	MasTec Inc	Nov. 1, 2005 -

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	Company	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value
2025-08-07	2025-08-05	MasTec Inc (MTZ)	S Sale	80,399 +18.1% 470.59 US$2,013,308	80,399 +18.1%	470.59	US$2,013,308
2025-08-07	2025-08-05	MasTec Inc (MTZ)	S Sale	32,340 +23.5% 381.68 US$3,736,201	32,340 +23.5%	381.68	US$3,736,201
2025-08-05	2025-08-04	MasTec Inc (MTZ)	PrS Proposed sale	78,145 130.49 US$1,274,579	78,145	130.49	US$1,274,579
2021-03-03	2021-03-02	MasTec Inc (MTZ)	S Sale	459 -0.7% 89.75 US$41,195	459 -0.7%	89.75	US$41,195
2021-03-03	2021-03-01	MasTec Inc (MTZ)	S Sale	19,328 -22.5% 89.64 US$1,732,562	19,328 -22.5%	89.64	US$1,732,562
2020-11-09	2020-11-09	MasTec Inc (MTZ)	PlS Planned sale	10,000 -10.4% 57.45 US$574,464	10,000 -10.4%	57.45	US$574,464
2020-11-09	2020-11-09	MasTec Inc (MTZ)	PlS Planned sale	13,202 -12.1% 57.38 US$757,539	13,202 -12.1%	57.38	US$757,539
2020-11-09	2020-11-05	MasTec Inc (MTZ)	PlS Planned sale	1,798 -1.6% 55.00 US$98,890	1,798 -1.6%	55.00	US$98,890
2020-10-13	2020-10-09	MasTec Inc (MTZ)	PlS Planned sale	5,000 -4.3% 47.02 US$235,100	5,000 -4.3%	47.02	US$235,100
2020-08-14	2020-08-12	MasTec Inc (MTZ)	PlS Planned sale	10,000 -7.9% 48.41 US$484,100	10,000 -7.9%	48.41	US$484,100