Sopwiths
Hi: Basically, yes they did go bust. After the First World War, the Company tried to diversify and enter non aviation markets, but without any real success. The final downfall occured when the Government of the day tried to get the Company to pay back money it had made during the wartime period, from its manufacture of aircraft.
In 1920 Sopwiths went into liquidation. Almost immediately though, Tom Sopwith and Harry Hawker started up another aviation company, the new concern being named Hawker Aviation.....