Meta's stock slid in after-hours trading on Wednesday after the tech giant posted strong third-quarter results but warned that its expenses will be significantly higher in 2026 than this year.

Like its rivals, Meta Platforms Inc. has been on an artificial intelligence spending spree and said its costs will grow much faster next year, driven by infrastructure costs and employee compensation as it has hired AI experts at eye-popping compensation levels.

"Employee compensation costs will be the second largest contributor to growth, as we recognize a full year of compensation for employees hired throughout 2025, particularly AI talent, and add technical talent in priority areas," Meta said.

Menlo Park, California-based Meta Platforms Inc. earned $2.71 billion, or $1.05 per share, in the July-September period. Excluding tax-related special expenses, the company would have earned $7.25. Revenue rose 26% to $51.42 billion from $40.59 billion.

Analysts, on average, were expecting earnings of $6.72 per share on revenue of $49.51 billion, according to analysts surveyed by FactSet Research.

Meta's daily active user base on its apps -- Facebook, Messenger, WhatsApp, Instagram and Threads -- was 3.54 billion on average for September, up 8% year-over-year.

For the current quarter, Meta is forecasting revenue in the range of $56 billion to $59 billion. Analysts are forecasting $57.36 billion for the October-December quarter.

Meta also cautioned that it is facing a slew of legal and regulatory issues in the U.S. and the European Union that could hurt its bottom line.

"In the U.S., a number of youth-related trials are scheduled for 2026, and may ultimately result in a material loss," the company said.

In the U.S., Meta is facing an antitrust case that's now awaiting a judge's decision and could force the company to break off WhatsApp and Instagram, startups Meta bought more than a decade ago that have since grown into social media powerhouses.

Meta's shares fell $57.67, or 7.7%, to $694 in after-hours trading. The stock had closed up slightly at $751.67.