Alphawave, Oxford Ionics and Spectris targeted as flagging share prices leave British companies vulnerable

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American investors are poised to snap up three companies listed on the London Stock Exchange for a combined value of more than £5bn, as flagging share prices leave British companies vulnerable to takeovers.

Alphawave, which is one of the few semiconductor companies listed in the UK, received an offer worth 183p a share from the US rival Qualcomm and on Monday the British company’s board recommended the deal to shareholders after months of talks.

The deal values the company, which designs and licenses high-speed connectivity technology that can be applied in datacentres and AI applications, at $2.4bn (£1.8bn).