First of all thanks to the readers that mentioned these two potential M&A arbitrage situations.
Acacia, a US based received a take over offer from Tech Giant Cisco valuing the company at 2.6bn or 70 USD per share. The offer price included a 46% premium on the undisturbed price. The stock traded at the time of writing at 64,75 USD, indicating a 5,25 USD or a 8,1% premium.
The transaction is expected to close at the end of Cisco’s Q2 FY 2020 which if I have read it correctly translates into January 2020.