They are also expected to announce that LSE chairman Donald Brydon would stand down from the same position of the merged group after three years.
City A.M. understands savings, as a result of IT systems merging and staff cuts, could total between £250m and £400m.
Under the terms of the proposed merger, the German company would control 54 per cent of the company and would be led by Carsten Kengeter, the current chief executive of Deutsche Boerse. The company will be headquartered in London.
The LSE’s Xavier Rolet will step down if the deal goes ahead and could take home £16m if the deal goes ahead.
And it has now been reported that Brydon is expected to leave the merged company after three years as chairman.
His replacement would need to be agreed by the Anglo-German board. Deutsche Boerse chairman Joachim Faber - who will be Brydon’s deputy - has been tipped as the frontrunner to replace him.
The savings announcement is set to be made as the companies face the prospect of counter-bids from Intercontinental Exchange (ICE), the owner of the New York Stock Exchange, and CME Group - which operates the Chicago Mercantile Exchange.
Earlier this month, Rolet talked up the “industry-defining combination” a merger between the two companies would create.
He said: "The European-based global markets infrastructure group offers significant benefits for our customers. We’re still in detailed discussions and we will update the market in due course.”
LSE and Deutsche Boerse declined to comment.