Nov 4 (Reuters) - Thomson Reuters ( TMSOF ) reported

higher third-quarter revenue on Tuesday, boosted by investments

in artificial intelligence products in its legal and tax and

accounting divisions.

The Toronto-based content and technology company also

reaffirmed its full-year 2025 guidance of a 7% to 7.5% rise in

organic revenue, which tracks income from existing businesses on

a constant currency basis.

"Our third-quarter results reflect continued momentum and

the ongoing execution of our AI-driven innovation strategy,"

Thomson Reuters ( TMSOF ) CEO Steve Hasker said in a statement.

The owner of Westlaw legal database, Reuters news agency and

the Checkpoint tax and accounting service reported third-quarter

adjusted earnings per share of 85 cents, slightly exceeding Wall

Street expectations, according to LSEG data.

Thomson Reuters ( TMSOF ) revenue rose 3% to $1.78 billion, meeting

expectations for the third quarter, during which it launched new

AI features in products in its legal and tax and accounting

divisions. It also purchased Additive AI, an artificial

intelligence-powered tax document processing specialist.

Revenue at its "Big 3" businesses - legal, tax and

accounting and corporates - rose 9% on an organic basis, while

Reuters News revenue rose 3% and global print revenue fell 4%.

Thomson Reuters ( TMSOF ) said it now expects an adjusted EBITDA

(earnings before interest, taxes, depreciation and amortization)

margin expansion of about 100 basis points, up from a prior

expectation of 50 basis points.

It also said it had completed a previously announced $1

billion share repurchase plan.

Up to Monday's market close, Thomson Reuters ( TMSOF ) shares have

fallen about 5.4% this year, underperforming the 16.5% rise in

the S&P 500 index, which has been boosted by increases in

AI-heavy big tech stocks.