> As of May 2012, SpaceX had operated on total funding of approximately $1 billion in its first ten years of operation. Of this, private equity provided about $200M, with Musk investing approximately $100M and other investors having put in about $100M (Founders Fund, Draper Fisher Jurvetson, ...).[47] The remainder has come from progress payments on long-term launch contracts and development contracts. As of April 2012, NASA had put in about $400–500M of this amount, with most of that as progress payments on launch contracts.

40-50% of funding from NASA contracts. Yes, this isn't necessarily the same as a direct subsidy, but, in fitting with the article:

"Many of the mid-century oligopolies had been anointed by the federal government with policies (and in wartime, large orders) that kept out competitors."