Helen Willis, Costain’s chief financial officer, received 97,615 nil‑priced options on April 10, 2026, under the 2023 share deferral plan.

A few days later, she sold 253,793 shares at just under 197p each, a 12% discount to the broker target. The transaction left her with 1,246,375 shares, amounting to 471% of her salary, well above the 200% guideline.

The move underscores Costain’s robust order book and regulatory footing, reassuring investors that the company’s capital structure remains solid amid geopolitical tensions. The sale will likely strengthen shareholder confidence in the firm’s governance and compensation practices.