Raymarine, which makes navigation equipment for the marine market, has received a takeover approach, news which has sent its shares soaring.
They have jumped 47.75p to 293.75p, valuing the company at around £240m.
Not everyone is happy. Adam Steiner, head of research at SVG Investment Managers which has a 0.39% stake in the company, said: "Raymarine is a highly coveted asset in a long-term growth market and should appeal to private equity and trade buyers alike, of which there are several potential 'fits' in the market place.
"Given this bid is opportunistic, we would be surprised if shareholders would accept an offer below the price at which the company was trading a year ago, especially in light of the good progress the management team have made over the last 12 months."
A year ago the shares stood at 475p.
Overall the market has ended higher, as Wall Street shook off comments from Federal Reserve chairman Ben Bernanke suggesting the US could go into recession. The FTSE 100 rose 63.3 points to 5915.9, with banks responsible for 17 points, mining for 16 points, oil for 7 points and Vodafone (4.1p better at 158.4p) and telecoms for 8 points.
Royal Bank of Scotland and Barclays both added around 5%, but HBOS bucked the trend, down 11.5p to 593p.
A trading statement from Severn Trent disappointed, sending its shares 54p lower to £14.14, but news that African gold producer Randgold Resources had boosted its reserves by 24% saw its shares climb 219p to £24.55. And to end with some takeover speculation, pharmaceuticals group Shire added 29p to £10.07 on a revival of the tale it might be in the sights of AstraZeneca or Pfizer.
