Cloudflare Surges 9% on OpenAI Security Partnership, Zscaler Rises 3%
A security partnership with OpenAI sent Cloudflare shares surging while cybersecurity giants CrowdStrike and Palo Alto sat out the rally entirely, raising a pointed question about which AI security narrative investors actually believe.
Shares of Cloudflare (NYSE:NET | NET Price Prediction) are ripping higher in Wednesday morning trading on a security tie-in with privately held OpenAI that investors are treating as a marquee validation of the company’s agentic-AI positioning. Cloudflare stock is up 9% to $308.52, extending the year-to-date gain to 56%. The size of the move relative to NET stock’s peers makes this a single-name repricing rather than a broad cybersecurity bid.
Zscaler (NASDAQ:ZS) is participating on a smaller scale, likely on the read-across from its own established OpenAI relationship through the DayBreak project and prior work with Anthropic. Zscaler stock is up 3% to $166.48, adding a bid to a name that had been under pressure heading into today.
Cloudflare’s Q2 FY2026 report already flagged the theme, with revenue of $696.1 million, up 36% year over year, and non-GAAP EPS of $0.29 against the $0.27 consensus. CEO Matthew Prince framed the company as sitting at the center of a “fundamental rewrite of the Internet for machine-to-machine traffic,” and the OpenAI service gives that pitch a concrete artifact investors can point to.
OpenAI Daybreak Partnership Fuels the Bid
On September 3, Cloudflare announced a context-aware vulnerability discovery and remediation service delivered through Cloudflare Managed Defense and built on OpenAI’s Daybreak cyber models. The service identifies high-risk software vulnerabilities, blocks attacks at the network edge, and generates code patches, though no financial terms accompany the partnership.
The announcement lands several sessions before today’s move, so this reads as investor conviction building around an existing launch rather than breaking news. Momentum and late recognition are doing part of the work, and Prince stated on the Q2 FY2026 call that “the number one thing that’s causing our phone to ring from big companies is them saying, listen, we know we have to do AI, but we need to do it more securely,” a positioning the OpenAI service now anchors with a shippable product.
Sector Peers Sit Out the Rally
The gap between Cloudflare and the rest of the group is the real story. CrowdStrike (NASDAQ:CRWD) stock is down 0.5% to $209.04, while Palo Alto Networks (NASDAQ:PANW) stock is down 0.85% to $334.13. Both companies have well-developed AI-security stories of their own that aren’t catching today’s bid.
For sector framing, the First Trust NASDAQ Cybersecurity ETF (NASDAQ:CIBR) is up 0.4% to $94.41, a muted gain that underscores how concentrated today’s flow is in Cloudflare. Furthermore, the Invesco QQQ Trust (NASDAQ:QQQ) is down 0.54% to $714.46. The CIBR ETF holds all four of today’s featured stocks, with Palo Alto and CrowdStrike as its heaviest cybersecurity weights and Cloudflare and Zscaler as smaller positions.
On the CrowdStrike Q2 FY2027 call, CEO George Kurtz stated that AIDR “can be bigger than the EDR business” given the volume of AI agents each employee will run, and net new ARR of $332.8 million grew 51% year over year. Palo Alto CEO Nikesh Arora called AI “a long-term tailwind for cybersecurity” on the Q4 FY2026 call after adding nearly $1 billion in net new next-generation security ARR in a single quarter. The absence of a sympathy move in either name reinforces the read that investors are paying for Cloudflare’s specific OpenAI positioning rather than a sector re-rate.
What to Watch
Insider filings show recent share disposals from Cloudflare President and Co-Chair Michelle Zatlyn, CEO Matthew Prince, and CFO Thomas Seifert dated August 15, with additional Zatlyn dispositions running through August 21. The recurring monthly cadence points to scheduled trading plans rather than reactive selling, worth naming since a headline about a large insider sale can otherwise land the wrong way.
Investors can watch for whether Cloudflare stock holds above $300 as the session progresses, and whether the OpenAI narrative eventually pulls in secondary names beyond Zscaler. The company’s next scheduled data point is Q3 2026 results, with prior guidance calling for revenue of $736 million to $737 million and diluted net income per share of $0.34. Position sizing on one’s NET stock exposure here should reflect that today’s move is momentum-led rather than tied to newly disclosed financial terms.
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David Moadel is financial writer specializing in stocks, ETFs, options, precious metals, and Bitcoin. David has written well over 1,000 articles for leading online publications, helping investors understand markets, income strategies, and risk.His work has appeared in The Motley Fool, InvestorPlace, U.S. News & World Report, TipRanks, ValueWalk, Benzinga, Market Realist, TalkMarkets, Finmasters, 24/7 Wall St., and others.With a master’s degree in education, David has taught at the elementary, high school, and college levels. That teaching background shapes his writing style: clear, educational, and practical. David has also built a loyal social-media audience by providing trustworthy financial content on YouTube, X/Twitter, and StockTwits.
