The HSBC annual report makes interesting reading. HSBC is one of the largest banking groups in the world.
The annual report and financial statements give a scale of the business.
https://www.hsbc.com/investors/results-and-announcements/annual-report
Revenues of $49.552 bn = £41.403 Bn
The scale and strength of the Balance Sheet:-
They held high-quality liquid assets of $717 Bn = £599.086 Bn = £0.599 Trillion
How the bank funds itself, mainly from customer deposits.
The largest shareholders are BlackRock and Ping Insurance.
The balance sheet:
$403,018 million = £336,740 million HSBC Deposits with central banks
$1,045,814 million = £873,826 million Loans to customers
$1,710,574 million = £1,429,263 million Customers deposits with HSBC
$78,557 million = £65,638 million of debt (securities issues, bonds)