Adani Energy Solutions, formerly Adani Transmission, is in early talks with US institutional investors to raise $400 million to $500 million through a private placement of bonds. The company is looking at Regulation-D notes with infrastructure assets as collateral, exempting it from certain registration requirements. The bond offering may include longer-tenor bonds maturing in 20-30 years. This follows Adani Green Energy’s ongoing roadshows for a US dollar bond offering to raise $409 million, with the deal expected to be priced next week.