Shareholders will vote on the proposal at a special meeting on Nov. 4, the company said. It did not specify the size of the capital raise.
Alfa's shares fell 4.25 percent to 39.4 pesos in early trading on Monday.
Earlier this year, Mexico finalized an energy reform that ends the decades-old monopolies of state-owned oil company Pemex and national power company CFE, aiming to lure billions of dollars in investment.
Alfa, which manufactures car parts and refrigerated foods as well as petrochemicals, is one of a handful of Mexican companies set to benefit directly from . . .