Bulk buying of shares

  1. how do this investor buy such a heavy bulk quanity of share do they use zerodha or any other broker like us

  2. if i want to invest a 5 crores in a single company at a single shot do zerodha allows if no what is the maximum amount i can invest in a particular company a single shot

You can place 1 lakh quantity per order.
If you want to buy more than 1 lakh shares, then use basket order.