OX2 AB (<a href="https://www.nasdaqomxnordic.com/aktier/microsite?Instrument=SSE227438&name=OX2&ISIN=SE0016075337" target="_blank">STO:OX2</a>) and a unit of Ingka Group, the largest IKEA retailer, have filed a permit application for the 3.1-GW Neptunus offshore energy hub project in southern Sweden which is planned to integrate hydrogen production.