Sustainable laundry technology developer Xeros Technology (LON: XSG) saw significant share price gains, with key executives purchasing millions of shares. The company is advancing tech verification with major washing machine manufacturers, potentially leading to paid development agreements. Shield Therapeutics (LON: STX) also experienced a 35% rise in share price following positive revenue forecasts and management share purchases. Light Science Technologies (LON: LST) announced a distribution agreement, boosting its share price by 29.4%. In contrast, Oncimmune (LON: ONC) and CMO Group (LON: CMO) faced steep declines, while Serinus Energy (LON: SENX) won a VAT refund case, increasing its share price.