HCL Technologies shares are the top gainers on the Nifty50 index in Friday's session, rising over 4%, a day after the firm signed a $2.1-billion deal with Verizon Business for providing managed network services to its global enterprise customers. The stock closed 3.24% higher at ₹1,171.35 apiece on the BSE. On a year-to-date basis, the stock is up 13.35%.