In which cases does one company have to conduct a financial analysis of another company?

Thanks for invitation, 

The following are some cases in which the organization have to conduct a financial analysis to another one:

1- Merging.

2- Acquisition.

3- Sharing another company in syndication.

4- Investing in shares or bonds of another company.

5- Supping to other company on credit basis.

6- Exporting to another company.