Shares of Protean eGov Technologies tumbled 20 per cent on Monday, May 19, triggering a lower circuit and halting trade, after the company revealed it had failed to move forward in the government’s high-stakes PAN 2.0 tender process. The setback stems from the Income Tax Department’s effort to overhaul the digital infrastructure behind Permanent Account Number (PAN) and Tax Deduction and Collection Account Number (TAN) systems. With an estimated outlay of Rs 1,440 crore, the PAN 2.0 initiative includes end-to-end development, deployment, and maintenance. Winning the contract would have secured Protean’s dominance in India’s tax-tech space.