Dominion Midstream Partners, which owns liquefied natural gas import, storage, regasification and transportation assets, filed on Friday with the SEC to raise up to $400 million in an initial public offering. The Richmond, VA-based company, which was founded in 2000 and booked $344 million in sales for the fiscal year ended December 31, 2013, plans to list on the NYSE under the symbol DM. Barclays and Citi are the joint bookrunners on the deal. No pricing terms were disclosed.