
The sources said a 13 percent top-up to the 24 euro-per-share cash offer from German carmaker Daimler and British engine maker Rolls Royce would win over Tognum's management.
'Everyone would be satisfied with 27 euros per share,' one of the people told Reuters on Thursday.
'(The offer) would have to be at least 10 percent more,' the other source said, signalling Tognum was hoping for an offer of at least 26.40 euros per share.
Tognum shares were up 2.6 percent at 25.55 euros by 1213 GMT, indicating investors were betting on a sweetened offer.
Tognum has so far said no agreement has been reached on an offer price. Its Chief Executive Volker Heuer said on Thursday the company would make further comment once it has received a written offer.
The company earlier on Thursday announced it was raising its dividend payment to shareholders to 0.50 euros per share, more than the 0.36 euro average estimate in a Reuters poll of analysts and said it saw its sales and margins rising this year and next year.
(Reporting by Philipp Halstrick and Alexander Huebner; Writing by Maria Sheahan; Editing by Will Waterman)
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