Just before the stock market cooled down before the US election, boeing's over $20 billion financing brought lucrative returns to four banks.

According to the documents submitted by boeing to the US Securities and Exchange Commission, goldman sachs, bank of america, citigroup, and jpmorgan are expected to receive up to $75 million in revenue each for serving as the lead joint bookrunners for this equity financing.

This accounts for nearly 80% of the total fees shared among approximately 20 banks participating in this transaction.

Representatives of boeing, goldman sachs, bank of america, citigroup, and jpmorgan declined to comment.