The FTSE 100 investment return over the 12 months to July 2025 came to 22.2%, combining a 19.1% price gain with a trailing dividend yield of around 3.1%. Computacenter (LSE: CCC), the infrastructure services group, rose 114% over the same period, making it the top-performing FTSE 100 stock across those 12 months. The Index Held Firm After a Volatile StartThe FTSE 100 struck an all-time high of just above 10,910 on 27 February before sliding as Donald Trump’s trade offensive unsettled global markets. Computacenter’s FTSE 100 Investment Return Outpaced the IndexComputacenter was promoted to the FTSE 100 in June after a string of strong trading updates. UK Technology Sourcing revenue climbed 33.4% to £940.9m, while UK Services revenue rose 5.6% to £478.3m.