JSA Advocates & Solicitors (JSA) is advising Online Instruments (India) Limited in connection with its proposed initial public offering of equity shares. The offering comprises of a fresh issue of equity shares aggregating up to ₹7,500 million and an offer for sale of up to 5,710,000 Equity Share of face value of ₹2 each.
The JSA team is led by Arka Mookerjee, Lead Partner, with support from Pracheta Bhattacharya, Partner, Arjun Rastogi, Principal Associate, Bhavna Sancheti, Senior Associate, Jeebitesh Bhattacharya, Senior Associate, Shreya Sharma, Associate, Aditya Sureka, Associate, Bernedict Rozario, Associate, Ishika Jain, Associate, and Sourav Jena, Associate.












Arka Mookerjee is a Partner and Co-Head of the Equity Capital Markets practice, with over 21 years of experience advising on India’s most complex and high-value transactions. Widely recognised for pioneering mandates—including India’s first QIP and InvIT IPO—he represents issuers, underwriters and investors across capital markets and investment structures. Arka actively engages with regulators and industry bodies, playing a key role in shaping India’s evolving capital markets framework.