STAG Industrial, a newly formed REIT with an initial portfolio of 101 single-tenant industrial properties in the US, filed on Thursday with the SEC to raise up to $300 million in an initial public offering. The Boston, MA-based company, whose predecessor was founded in 2003 and booked $30 million in sales last year, plans to list on the NYSE under the symbol STIR. BofA Merrill Lynch and J.P. Morgan are the lead underwriters on the deal. No pricing terms were disclosed.