The company said Monday it expects to grant underwriters a 30-day option to buy up to 2,777,775 additional shares.
BofA Merrill Lynch, Morgan Stanley and Goldman Sachs & Co. will jointly serve as Parsons’ lead book-running managers for the IPO.
Wells Fargo Securities and Jeffries serve as senior co-managers on the flotation while SunTrust, Cowen, Scotiabank, MUFG and Robinson Humphrey serve as co-managers.
Parsons registered with the Securities and Exchange Commission in mid-April.