New York, Feb 24, 2026, 09:28 EST — Premarket
- Tenable shares are hovering near the bottom of their 52-week range after a sharp drop in the prior session.
- Cybersecurity stocks sold off as investors digested a new AI security tool from Anthropic and what it could mean for the sector.
- Traders are watching for follow-through at the open and the company’s next investor appearance for clues on demand and competition.
Tenable Holdings shares were little changed in premarket trading on Tuesday after a sharp slide in the prior session left the cybersecurity firm trading near fresh lows.
Selling swept across security software on Monday after AI startup Anthropic rolled out a new feature, Claude Code Security, aimed at spotting high-severity bugs in open-source code and suggesting fixes. “What you’re seeing today is really the continuation of a panic-driven, narrative-led selloff,” said Shrenik Kothari, director and security and infrastructure analyst at Robert W. Baird, in a note on the move. (Reuters)
Tenable closed down 11.85% at $17.55 on Monday and was down 0.28% at $17.50 in extended trading ahead of the open, after trading between $17.28 and $19.89. The stock is now sitting near its 52-week low of $17.27, with volume on Monday rising to about 5.48 million shares versus an average of roughly 3.21 million. (MarketBeat)
Premarket trading happens on electronic venues before the 9:30 a.m. regular session, and liquidity can be thin. Moves can look dramatic, then fade fast once the cash market opens.
The worry for some investors is basic: if AI tools automate more of the “find the bug, patch the bug” loop, parts of the security stack could see pricing pressure. Tenable sells software that helps customers find and rank security gaps across systems, a corner of the market that sits uncomfortably close to that debate.
The sector move also landed on a rough day for broader markets. The S&P 500 fell 1% on Monday as investors weighed tariff uncertainty and continued to punish companies seen as potential losers from rapid shifts in AI, the Associated Press reported. (Midland Daily News)
But the AI narrative cuts both ways. Kothari argued Anthropic’s tool does not replace real-time intrusion detection and other production security tasks, and some investors see the selling as an overreaction — still, the tape is the tape, and it’s been brutal for smaller software names.
A downside case is straightforward too: if the risk-off mood sticks and more AI product launches keep hitting the same nerve, Tenable could struggle to hold the bottom of its range. A break lower would likely pull in more technical selling, especially with the stock already under pressure.
The next company-specific checkpoint is March 3, when co-CEO Steve Vintz and CFO Matt Brown are scheduled to present at the Morgan Stanley Technology, Media & Telecom Conference in San Francisco. (Nasdaq)
