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Which FTSE technology firms won and lost today?

Published: December 17, 2025 at 5:00 pm

Among the tech names on the FTSE All-Share, Serco (+7.38%) led gains after a trading update that lifted profit and cash guidance for 2025 and set out stronger-than-expected initial forecasts for 2026, with the company also announcing a planned CFO succession.

Ceres Power (-6.06%) was among the sharpest fallers after a short-seller published a critical report questioning the outlook for its technology and commercial model. 

TT Electronics (-1.93%) slipped after DBAY confirmed it does not intend to make an offer for the company.

Elsewhere, Aptitude Software (+3.56%) and Molten Ventures (+4.39%) rose, while FinTech names such as CAB Payments (-4.92%) and AJ Bell (-2.19%) were weaker.

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