RWS Holdings said its pretax profit for the first half was £14.3m, up from £10.9m. Revenue was £76.6m, from £56.9m.
The company improved its interim dividend 3% to 1.30p a share, from 1.15p.
"This has been a period of extremely strong performance across all of the Group's service offerings," said chairman Andrew Brode.
"Having completed the integration of CTi, we were delighted to have acquired LUZ, which complements our existing life sciences offering both operationally and geographically.
"As the premier global supplier of intellectual property support services and now a major force in life sciences, we believe we are exceptionally well positioned to drive further international expansion."
Brode said that both RWS' financial and market positions remained strong and that it continued to see an interesting pipeline of niche acquisition opportunities to complement its organic growth.
"Overall, we anticipate further progress in the second half of the financial year, with the full benefit of the LUZ acquisition which is already contributing strongly."