There are over 30 different types[1] of 8Ks and receiving notifications on all of them will inundate your inbox. It's a shameless plug but my 'lay-person investor' site will allow you to filter and select which 8Ks to view and receive notifications on. For example, you can receive an email every time a company files an event about a Bankruptcy / Receivership 8K: https://last10k.com/stock-screeners/bankruptcy-receivership

[1] https://www.sec.gov/answers/form8k.htm