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Keller Group Shares Post Their Largest Gain in Six Months

Keller Group shares rose 5.22% to 3478.6p by 9.15am in London today, their largest one-session move in six months, with no catalyst yet identified for the advance.

Keller Group (LON: KLR), the ground engineering and construction contractor, rose 5.22% to 3478.6p by 9.15am in London today, its largest one-session move in six months. The FTSE 350 constituent provides foundation and geotechnical engineering services on construction projects, with a market value of around £2.23bn.

The shares have traded between 3312p and 3488p so far in the session, recovering from that early low to sit just below the day’s high of 3488p. Turnover so far stood at around a fifth of the stock’s average daily volume, with much of the session still to run.

Bar chart of Keller Group's daily percentage change over six months, with today's move highlighted as the largest
Keller Group PLC daily percentage change, six months to Monday 28 September 2026, today’s move highlighted

How unusual this is

Today’s 5.22% advance is the largest single-session move for Keller Group of the past 126 trading sessions, a window equivalent to roughly six months of trading. No other daily move across that stretch has matched the size of today’s gain, making this the sharpest rise the stock has produced in that period.

The shares remain close to the top of their session range as trading continues through the London morning. No specific catalyst for the move had been identified as of the time of writing.

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