The Abu Dhabi Investment Authority and the Qatar Investment Authority have invested in Adani Energy Solutions' share sale in India, valued at up to $1 billion, according to two sources. This marks the first such deal since a critical report from short-seller Hindenburg Research last year.

This investment is Adani Group's first equity market fundraising since a $2.5 billion share sale was canceled in February last year following allegations from Hindenburg Research of improper use of offshore tax havens and stock manipulation, which Adani has consistently denied.

Among the over 50 investors involved are GQG Partners, Nomura, and India's Bandhan Mutual Fund. These details come from sources with direct knowledge of the deal who preferred to remain anonymous as the investor names are not public.

The investment will support Adani as it seeks to regain investor confidence after Hindenburg's report led to a $100 billion sell-off in the group's stock. Despite this setback, Adani's shares have significantly recovered.

Adani Energy, which focuses on power transmission and distribution, raised funds through a Qualified Institutional Placement, a method used by listed Indian companies to attract investments from large institutions.

In a statement, Adani Energy mentioned that the floor price for the issue was set at 1,027.11 Indian rupees ($12.27), slightly below Tuesday's closing price of 1,124.9 rupees, but did not disclose any investor names. The share sale was for $700 million, with an option to increase by a further $300 million. The share sale commenced on Tuesday.

On the same day, Adani Energy's shares increased by about 7%, although the stock remains roughly 60% lower than its value before the Hindenburg Research allegations.