Mumbai, Sept. 15 -- Orbicular Pharmaceutical Technologies has attracted early interest from private equity firms including Warburg Pincus and CVC Capital Partners, as the specialty pharmaceutical firm explores a stake sale in a deal that will likely value the company at up to $1.5 billion, three people familiar with the matter said.

"The company has mandated Jefferies as the advisor and existing investor Tata Capital Healthcare Fund is likely to explore a part or full exit as a part of the transaction," one of the people cited above said on the condition of anonymity.

"The exact quantum of the stake sale and valuation may evolve depending on the incoming investor," the second person said.

"While the deal is in its early days, CVC and W...