Macquarie Group Limited is an Australian multinational independent investment bank and financial services company. Headquartered and listed in Australia (ASX: MQG), Macquarie employs more than 14,000 staff in 25 countries, is the world's largest infrastructure asset manager and Australia's top ranked mergers and acquisitions adviser, with more than A$495 billion in assets under management. 

Macquarie holds a number of licences enabling it to conduct activities in the jurisdictions in which it operates and is regulated by a significant number of regulators globally.

In Australia, Macquarie Bank Limited holds a banking licence and as an authorised deposit-taking institution (ADI), is supervised by the Australian Prudential Regulation Authority (APRA). Other key Australian regulators include the Australian Securities & Investments Commission (ASIC) and AUSTRAC.

In addition, Macquarie also has a global network of regulators in many countries such as US, UK, Japan, Hong Kong, Korea and New Zealand.

Macquarie's business activities are organised into five principal operating groups:

Macquarie Asset Management – The world's biggest infrastructure asset manager and a top 50 global asset manager, managing more than $A495 billion of assets on behalf of superannuation funds and other institutional investors.

Corporate and Asset Finance – Lends to customers and leases assets to businesses including a fleet of more than 600,000 cars, passenger aircraft, medical equipment, electronics equipment, rail stock and mining equipment.

Banking and Financial Services – Comprises Macquarie's retail banking operations and provides personal banking, wealth management and business banking products and services to more than 1 million clients.

Commodities and Global Markets – Conducts research on more than 2,300 stocks and market trading on behalf of clients across more than 160 products including equities, derivatives, fixed income, foreign exchange and commodities.

Macquarie Capital – Advises companies on growth opportunities, sources investment funds, negotiates transactions and lists companies on the share market, as well as investing alongside clients.

According to en.wikipedia