Swiss giant Zurich has said that any forthcoming offer for buying RSA will likely solely be in cash.
Global broker Willis had net income of $280m for the six months to 30 June 2015 compared to $293m in the same period last year.
JLT's first half profit margin declined from 19.7% last year to 17.3% as it made a net trading loss of £12.6m on its US specialty business. The broker said this was in line with expectations.
Zurich has confirmed it is evaluating an offer to buy UK-headquartered insurer RSA.
Spanish insurer Mapfre has reported a 31% drop in post-tax profit for the first six months of 2015 to €315.6m (£223m).