4259.T stock up 8.40% to ¥800 on JPX 04 Feb 2026: earnings catalyst ahead

4259.T stock closed at ¥800.00 on JPX on 04 Feb 2026, rising 8.40% from yesterday on heavy volume of 2,913,700 shares as the market closed. The jump tested a year high of ¥808.00 and follows a strong six‑month rise of 74.44%. Traders cite a mix of AI contract wins and an upcoming earnings announcement on 12 Feb 2026. We examine valuation, technicals and Meyka AI forecasts to assess whether ExaWizards Inc. (4259.T) fits AI‑stock portfolios in Japan.