I don't have a 1099-B and a bank/brokerage was not involved. What do I put for the "Bank or Brokerage" field?

I was given stock in a small C corp back in 2014. The company repurchased my stock in 2019. A bank or brokerage was not involved and I did not receive a 1099-B. What do I put for the "Bank or Brokerage" when asked, "Which bank or brokerage sent you a 1099-B for these sales?".