Alphabet (GOOG) Stock After Hours Today (Dec. 17, 2025): Google’s AI-Chip Push, Gemini 3 Flash Rollout, and What to Watch Before Thursday’s Market Open
Alphabet Class C shares (GOOG) closed down 3.14% at $298.06 on Dec. 17, then held steady in after-hours trading. The drop followed a broader tech selloff driven by renewed concerns over AI infrastructure costs and debt, after Oracle’s $10 billion Michigan data center project lost key financing. Trading volume reached nearly 25 million shares.