Walmart is among the companies that imports the most at the affected ports, data showed.George Frey/AFP via Getty ImagesThe port workers' strike could disrupt business for big retailers, according to ImportGenius data.Walmart, Ikea and Samsung are some of the biggest importers at ports affected, the data show.JPMorgan predicted the strike could cost the US up to $5 billion daily.Major retailers are pivoting their shipping plans and preparing for the financial impact of the ongoing port strike.Each day that dockworkers and maritime workers aren't moving along cargo, companies that import goods at the East and Gulf Coast ports will experience disruptions to supply chains.Alan Murphy, the CEO of the liner research firm Sea-Intelligence, said on CNBC on Tuesday that if the strike lasts more than a month, it will tip the US into a recession.