"during merger" is correct and usable in written English.
You can use it to describe something that occurs during or within the timeframe of a merger. Example: The board of directors met frequently during merger negotiations to develop the best plan for the two companies.
The European competition commissioner, Margrethe Vestager, said: "Companies are obliged to give the commission accurate information during merger investigations.
Using deals in the zero spillover group as a benchmark, we find that acquirers with positive spillovers generate an additional 3.4 negatively biased news articles during merger negotiations.
We test whether bidders disclose information designed to depress the target's stock price during merger negotiations, when the takeover price is being determined.
This result suggests that bidders' disclosure during merger negotiations is strategic and not being driven by a missing factor (say, a change in performance).
In 2010 the US food firm Kraft closed Cadbury's Somerdale factory, breaking a pledge made during merger talks that it would be kept open.
Consistent with this argument, we find that during merger negotiations, target firms uniformly disclose more positive news, independent of the nature of the information spillovers with the acquiring firm.
Constant, consistent communication is essential during mergers and acquisitions.
Inaccurate valuing of data assets can be costly to shareholders during mergers and acquisitions (M&A).
Communications during mergers is a tough challenge and never an easy ride.
Such active learning is important in on-boarding programs, during mergers and acquisitions, and for transferring expertise.
Records that could easily be lost during mergers, takeovers, and IT-system updates would be archived for a reasonable period of time.
