I am trying to find a list of US companies that have defaulted in the recent past .Any link for this?
I'm not sure why you tagged your question equities. Do you mean that you don't care for corporation that don't have publicly traded equity, but have defaulted on their debt?
A good start would be the Credit Derivatives Determinations Committees (spun off from former ISDA Credit Derivatives Determinations Committee in 2018). Look for North American corporate events like "Has a Bankruptcy Credit Event occurred with respect to Noble Corporation?" or "Has a Bankruptcy Credit Event occurred with respect to ENSCO International Incorporated?"