The total amount paid was about Rs 1,725.04 crore, it added.
The allotment was made on Tuesday following a special resolution passed by the board members on June 25, the filing showed.
SoftBank is also the single largest investor in Ola.
In May, Tata Sons Chairman Emeritus Ratan Tata - who is also an investor in Ola - had invested an undisclosed amount in OEM as part of series A funding round.
Also as part of the series A, OEM had announced raising Rs 400 crore led by Tiger Global and Matrix India in March this year.
Ola Electric is currently running several pilots involving charging solutions, battery swapping stations, and deploying vehicles across two, three and four-wheeler segments.
OEM was initially established to enable Ola's electric mobility pilot programme in Nagpur.
In 2018, Ola announced 'Mission: Electric' to bring 1 million electric vehicles on Indian roads by 2021.