In April this year, Ola had raised USD 400 million (about Rs 2,500 crore) from a clutch of investors led by DST Global.
According to sources, the Bengaluru-based firm is looking at raising upwards of USD 500 million in a series F round, which will value Ola at about USD 5 billion.
An announcement is expected regarding this in the next few weeks.
When contacted, an Ola spokesperson said the company does not comment on market speculations.
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According to reports, the company has already secured about USD 250 million funding from Falcon Edge Capital, Tiger Global, Softbank and others.
Ola's rival Uber had recently announced an investment of USD one billion in India as the demand for app-based taxi-hailing services picks up in the country.
The Indian firm has previously said it clocks more than 750,000 trips a day and expects to hit the one million milestone soon. It offers services in over 100 cities.
Ola has also been steadily investing across various programmes to grow the driver partner ecosystem.
It has also introduced services like shuttle services, expanding mobile wallet, introducing cars with WiFi and offering a cafe service on its app.