The company, backed by Giouroukos’s Technomar and two investment firms, is looking to sell 15,380,000 shares at between $14 and $16 each.
A further 2,307,000 shares are available to underwriters in a listing which is backed by nine banks.
Poseidon first revealed its intention to go public in June, with Morgan Stanley, Deutsche Bank and UBS as joint bookrunners.
Today’s filing shows Citi, Jefferies, ABN AMRO, DVB, Credit Agricole and UniCredit have been brought on board.
Buys lined up
Poseidon said in its prospectus that it will net $214.3m from the initial shares sale based on a mid-range $15 per share price. Its pot will grow to $246.7m if underwriters take up their stock.
It is heading to market with a fleet of 19 vessels to its name.
The shipowner said $85.8m from the IPO purse would be used to help fund the $219.2 arrival of four additional vessels from a third party, which have charters in place for more than three years.
A new loan of $131.4m is being lined up to help fund these ships.
Poseidon also has options to buy two trading vessels and two newbuildings from related party Odyssia for $320m.
Giouroukos founded Technomar in 1994. Kelso and Maas Capital Investments are the other two investors behind Poseidon. They will retain a 55% interest after the listing.
Technomar is the world's 17th largest boxship owner, according to the filing, sandwiched between Hansa and Ahrenkiel.
Poseidon would join three of the top four, Seaspan, Costamare and Danaos, as listed boxship owners in the US.