Pemex has entered into a partnership with Global Water Development Partners (GWDP) that aims to invest US$800 million in water treatment infrastructure projects.
It could be a nearly US$600 million cash deal.
Constellation said it will invest more than US$2 billion in its Mexican operations to expand its bottling and brewery plant in Coahuila.
Microsoft Corp has pledged to invest around US$1 billion in Mexico between this year and 2018 to promote education and access to information technology in the country.
The new low-tax investment vehicle is aimed at tapping markets to fund energy infrastructure in the country.
In a meeting today with President Enrique Peña Nieto, AT&T Chairman and CEO Randall Stephenson announced the inversion to extend its high-speed, mobile Internet service to Mexico.