4506.T Sumitomo Pharma (JPX) +28.88% to JPY 3,184.00 on 17 Feb 2026: volume key

The 4506.T stock surged 28.88% to JPY 3,184.00 on 17 Feb 2026 at market close on the JPX, driven by heavy trading and strong underlying earnings metrics. Volume reached 38,215,500.00 shares versus an average of 9,460,054.00, marking this as one of the market’s most active names. Traders and analysts are watching follow-through as the move lifted the stock well above its 50-day average of JPY 2,391.52 and 200-day average of JPY 1,661.94, a sharp technical shift for the Healthcare sector in Japan.