Thomson Reuters plans to make 835 job cuts, including 140 in editorial, according to an email seen by several news outlets.
The financial information firm is making the cuts to reduce duplications following a merger between the two companies earlier this year, according to an internal email sent to staff.
Reductions include 140 news positions, as many as 650 jobs in content, technology and operations, and 45 posts in sales and service, the email said.
Several rival news organisations have seen copies of the email, including Bloomberg and AFP.
"Unfortunately, the overlap we've found (since creation of the new group) and our need to run the operation efficiently means that we will have to eliminate around 140 jobs world wide by the end of the year," according to an excerpt published by AFP.
More than half the jobs to be cut will be in Europe, the company added in the email.
Thomson Reuters was formed on April 17th this year after a merger between Canada's Thomson and London-based Reuters for £8.7 billion. The new group is now similar in size to financial information leader, Bloomberg.
The firm is hoping to make savings of around $750 million this year, in contrast to the $500 million originally envisaged.
The headcount reduction will help Thomson Reuters achieve this goal, according to the memo.
Earlier this month, the National Union of Journalists said its members at Thomson Reuters would vote on strike action over the threat of redundancies and changes to their working conditions.