Xero recently announced it would de-list from the NZX, citing a desire to consolidate its dual NZX and Australian listings.
"The strong demand and support from our existing and new shareholders is a validation of our long term growth strategy and execution," Drury said.
"Consistent with our global growth aspirations, broadening our investor base with aligned institutional shareholders is an effective way to increase the company's free float and drive additional liquidity in Xero shares."
Drury said the sale would allow him to pursue a range of philanthropic and social endeavours in the future.
"Xero remains my absolute day to day focus as we have so much opportunity.
"I'm as passionate about Xero today as the day we founded the business and I'm proud of what we have achieved as a company, evidenced by our strong recent financial results. We have a lot more to do in order to realise our global growth aspirations, and I remain fully committed to Xero and building our global business from New Zealand," he said.
Xero shares opened at $32.50, down from yesterday's closing price of $33.