Fourteen results announcements across UK contractors, specialist engineers and materials producers, published through the 2026 reporting season to 7 September, read for one measure: what is left after the work is done.
The headline is that the margin has come back. Five firms widened their operating margin while growing revenue. Keller lifted its underlying operating margin to 7.3% from 7.0%, a fourth consecutive half above 7%, on revenue up 11.1% at constant currency and a record £1.9bn order book. Morgan Sindall reached 4.4% from 3.9% on record interim numbers, taking turnover through £2.5bn and raising both its Construction margin target and its Fit Out profit target. Kier added a further 10 basis points to 3.5% in its half year to December. Balfour Beatty took its earnings-based businesses to 2.9% from 2.2%, lifting profit there 42% to £153m and raising full-year guidance on the back of it. Laing O'Rourke more than doubled its pre-tax margin to 2.2% over a year in which turnover was 6.6% lower. Costain held steady at 3.2% on a record £7.0bn of forward work.
Almost all of that improvement traces back to the same few markets. Power transmission, water, rail and commercial fit out are where divisional margins now sit well ahead of group margins — Balfour Beatty's support services at 9.1% from 6.9%, Morgan Sindall's fit out at 6.9% on revenue up 19% to £996m, Kier's Infrastructure Services at 4.5% — and where firms are raising medium-term targets rather than defending them.
Outside the UK reporting calendar, ACS Group's first quarter showed the same pattern at wider margins. Dragados grew sales 10.8% FX-adjusted and EBITDA 23.1%, widening its EBITDA margin by 59 basis points to 6.2%. Across Engineering & Construction the margin improved 75 basis points to 6.6%, and at group level ACS lifted operational net profit 25% to €239m, closed the quarter on a record €99.8bn order backlog and raised full-year operational net profit guidance to growth of 20 to 25%. These are EBITDA margins in euros over three months, so they read alongside the sterling tables rather than against them.
The materials producers and specialist engineers are at a different point in the cycle, and each has published a route forward. Severfield is targeting 7–8% operating margins on £500–550m of revenue, with a record year in India already behind it. Speedy Hire has opened FY27 with EBITDA up 13% and £90m of annualised contract wins. Breedon delivered its first like-for-like first-half revenue growth since 2023, and Winvic expects to clear £1bn again in 2027.
What it means for hiring. Across the season, the firms that widened their margins grew profit faster than revenue rather than the other way round, which puts the premium on bid leadership, commercial leadership and planners who can price risk properly. The roles sit where the margin is — energy, water, rail and fit out — and the secured workload behind those numbers gives candidates unusual visibility: £22.9bn at Balfour Beatty, a record £17.2bn at Laing O'Rourke and £11.9bn at Kier, covering over 90% of next year's revenue.
Kier publishes full-year results on 15 September and Galliford Try on 17 September. Both have pre-announced at the top end of expectations, and both will join the table when they report.