Meta Platforms shares closed at $715.62 on September 28, 2026, after a sharp 4.8% drop tied to the launch of its new enterprise AI platform and the hiring of MongoDB’s CEO to lead it, following a 13% rally earlier in the week that pushed the stock to a 52-week high of $779.82. Strong advertising revenue momentum, with 28% year-over-year growth in the second quarter and AI-enhanced ad performance, continues to underpin trader sentiment, though elevated capital expenditures and margin pressure from AI investments remain key concerns ahead of the October 28 earnings release. Analyst consensus targets cluster near $760–$790 with a strong buy rating, reflecting optimism around the Muse AI agent’s potential despite short-term volatility.