Enable Midstream Partners LP, which owns, operates and develops natural gas and crude oil infrastructure assets, filed on Tuesday with the SEC to raise up to $500 million in an initial public offering. The Oklahoma City, OK-based company, which was founded in 2013, plans to list on the NYSE under the symbol ENBL. Morgan Stanley, Barclays and Goldman Sachs are the joint bookrunners on the deal. No pricing terms were disclosed.