New York, Feb 24, 2026, 09:28 EST — Premarket
- Tenable shares, after plunging in the previous session, are now trading close to their 52-week lows.
- Cybersecurity names dropped after Anthropic unveiled its latest AI security tool, raising fresh questions for the sector.
- Traders are eyeing the open for signs of momentum, and looking ahead to the company’s upcoming investor event for any read on demand or competitive pressures.
After tumbling hard in the previous session, Tenable Holdings shares steadied in early Tuesday premarket action, with the cybersecurity stock hovering just above recent lows.
Security software stocks took a hit Monday after Anthropic, the AI upstart, introduced Claude Code Security—its latest feature for detecting critical vulnerabilities in open-source code and recommending patches. “What you’re seeing today is really the continuation of a panic-driven, narrative-led selloff,” wrote Shrenik Kothari, director and security and infrastructure analyst at Robert W. Baird, commenting on the slide. Reuters
Tenable ended Monday at $17.55, dropping 11.85%, and edged down another 0.28% to $17.50 in premarket action. Shares traded between $17.28 and $19.89 during the session. The stock’s now hovering just above its 52-week low of $17.27. Volume spiked to roughly 5.48 million, far exceeding the 3.21 million average.
Trading before 9:30 a.m. takes place on electronic platforms, often with limited liquidity. Big swings might show up in premarket, only to disappear quickly when the regular session starts.
Some investors have a straightforward concern: as AI handles more of the “find the bug, patch the bug” cycle, segments of the security stack might face pricing headwinds. Tenable, which offers software to identify and prioritize security flaws across systems, operates right at the edge of that discussion.
It wasn’t just the sector feeling pressure on Monday. The S&P 500 slid 1% as investors navigated tariff jitters and kept unloading names viewed as casualties of fast-moving changes in AI, according to the Associated Press.
The AI story isn’t one-sided. Kothari said Anthropic’s tool isn’t a substitute for real-time intrusion detection or other production security jobs. Some investors think the selloff’s gone too far. Still, the tape shows no mercy for smaller software stocks.
The downside scenario is clear enough: should the risk-off sentiment persist and fresh AI product announcements continue to rattle investors, Tenable might have trouble maintaining support at the low end of its range. If shares slip past that level, odds are good that technical sellers will step up, considering the stock’s current weakness.
March 3 is on the radar for the next company event: co-CEO Steve Vintz and CFO Matt Brown are set to speak at the Morgan Stanley Technology, Media & Telecom Conference in San Francisco.
