As of 2021, the top 10 hedge funds by assets under management (AUM) are:
1. Bridgewater Associates – $140 billion
2. Renaissance Technologies – $75 billion
3. Man Group – $67 billion
4. Two Sigma Investments – $58 billion
5. AQR Capital Management – $53 billion
6. Millennium Management – $52 billion
7. Elliott Management – $41 billion
8. Citadel – $40 billion
9. D.E. Shaw & Co. – $38 billion
10. BlackRock – $35 billion
Please note that these rankings can vary over time, as AUM can change due to various factors like investment performance and fund inflows/outflows.