Synopsis: Cyber stock shares plunged 20% to hit the lower circuit as the market reacted to Anthropic’s Claude Code Security, an AI tool challenging legacy COBOL system solutions and potentially reshaping the cybersecurity landscape.
The shares of this company are in the business of providing risk-based vulnerability management and assessment solutions, and cybersecurity quantification is in the spotlight after hitting a lower circuit in today’s market session as Claude Code Security has been launched by Anthropic.
With a market capitalisation of Rs. 941 cr, the shares of TAC Infosec Ltd were trading at Rs. 455.95 per share, hit a lower circuit of 20% in today’s session, making a low of Rs. 415.70, down from its previous close of Rs. 519.60 per share.
The stock has experienced significant losses over various time periods: a 31% decline over the past year, a 21% drop in the last six months, a 47% decrease over the past three months, and a 35% fall in the past month. As of Q3FY26, Ace investor Vijay Kedia holds 9.58% stake in the company.
What’s the News
Claude Code Security has been launched by Anthropic and is a new tool for finding critical vulnerabilities in open-source software repositories as well as identifying fixes to correct these vulnerabilities.
It will also assist with modernising legacy systems that run on COBOL, which is a programming language that has been around for decades and is in widespread use across business infrastructure today.
Claude Code Security will automate the exploration of the processes used to analyse and modernise COBOL. This has been a market area dominated by IBM and its solutions running on mainframes for quite some time. COBOL began to be used in the late 1950’s as a common business-oriented language.
Anthropic estimates that approximately 95% of ATM transactions in the United States are still recorded in COBOL and the potential disruption resulting from cost-effective AI solutions for COBOL is significant.
US stocks like CrowdStrike, Datadog and Zscaler, on the other hand, all saw their stock prices drop approximately 11%. Fortinet and Okta dropped about 6%. Palo Alto Networks and SentinelOne were down by approximately 3% and 5%, respectively.
Anthropic indicates, “Hundreds of billions of lines of COBOL code are executed every day throughout the finance, government, and airline industries,” yet similar to the lack of COBOL usage, diminishing expertise is also common.
Indian cybersecurity stocks also faced sharp losses in today’s trading, reflecting growing market concerns over AI-driven risks. Tech D Cybersecurity dropped 15%, while Quick Heal fell around 5%. Other players like Expleo Solutions and Sasken Technologies were down 5.5% and 3%, respectively. Overall, the Nifty IT index slid 5.1%, highlighting the widespread pressure across the country’s cyber and IT sector.
TAC Infosec Ltd is an Indian cybersecurity company that specialises in vulnerability management, risk scoring and penetration testing solutions for businesses both in India and globally. Its flagship platform which is Enterprise Security in One Framework (ESOF) uses advanced AI to detect and quantify cyber risks across IT systems, applications, and web assets.
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