** Jefferies changes recommendations for four companies in the Support Services sector after latest earnings reports
** It upgrades the Danish ISS ISS.CO to "buy" on improving commercial trends and its "underappreciated" strong free cash flow outlook
** It upgrades the Swiss staffing company Adecco ADEN.S to "hold" on improving temporary recruitment (temp) volumes and business development momentum
** Jefferies expects the British Hays' HAYS.L earnings momentum to remain negative due to challenges in permanent recruitments, downgrading to "hold"
** The construction equipment rental Ashtead AHT.L gets downgraded to "hold" to "pause for breath" after its shares have rallied on U.S. construction optimism
** It says Randstad RAND.AS remains its preferred pick in the staffing sector, reiterating "buy" rating
** It names Intertek ITRK.L and Bureau Veritas BVI.PA as it top picks in the testing sector, saying the U.S. tariff and slowing growth concerns were overdone