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Due to the impact of Anthropic's introduction of the Claude code security feature, US cybersecurity stocks plunged across the board

2026.02.24 14:43:23

On February 24th, several leading publicly traded cybersecurity firms saw their stock prices dip in the wake of Anthropic’s launch of Claude Code Security last Friday. The AI-powered code vulnerability scanning tool rolled out as a limited research preview on February 20th. Per Anthropic’s website, its Claude chatbot can “scan entire codebases for vulnerabilities, validate each finding to cut down on false positives, and offer remediation suggestions for review and approval.” Claude’s code reasoning process is “similar to that of a seasoned security researcher”—it can grasp context, trace data flows, and “catch vulnerabilities missed by pattern-matching tools” before proposing fixes. This week, shares of the top five U.S. cybersecurity firms by market cap have continued to slide. Palo Alto Networks—the largest U.S. cybersecurity company, with a $116 billion market cap—has seen its stock drop nearly 9% since the feature launched. CrowdStrike, which offers endpoint security, threat intelligence, and network attack response services, has fared worse: its stock has plummeted 18% since February 20th, erasing $20 billion in market value. Meanwhile, Google Finance data shows Fortinet (headquartered in California) has seen a 9% decline in its share price over the same stretch. Other leading players like Cloudflare and Zscaler have also posted stock drops amid the new AI competitor.
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