Cloud Security Stocks Slip on Wall Street... 4 Trillion Won Vanished in a Day

Cloudflare Inc. (NET) closed at $170.65 on the New York Stock Exchange on May 3, down 6.61% from the previous day. Its market capitalization stands at about $53.7 billion (roughly ₩72 trillion), with today’s drop alone erasing around $3.3 billion (approximately ₩4.5 trillion) in corporate value. Trading volume reached 4.33 million shares.

In its Q4 2025 DDoS Threat Report, Cloudflare disclosed that it detected and mitigated a record-setting 31.4 Tbps DDoS attack. In the 2026 Cloudflare App Innovation Report, the company warned of a “technical glass ceiling” that is simultaneously constraining AI growth and weakening cybersecurity, urging enterprises to increase infrastructure and network investments.

Cloudflare is a U.S. infrastructure provider offering a “connectivity cloud” that encompasses web security, content delivery, DNS, and edge computing. Co-founded and led by CEO Matthew Prince, Cloudflare handles traffic for millions of organizations worldwide, blocks billions of online threats each day, and extends its impact through initiatives such as election security and defense programs for media and nonprofit groups.