Senior plc has attracted five takeover proposals in recent months, with Advent International confirmed as one of the suitors. The British engineering group initially rejected a January bid as undervaluing the company, only to see the same bidder return with two higher offers, both declined. In February, Senior received two further higher all-cash offers from other parties currently under review.

Advent has until March 27 to make a formal offer under UK takeover rules, though bid values remain undisclosed. Senior supplies critical components to Boeing and Airbus, and aerospace dealmaking has accelerated as manufacturers seek greater supply chain control. The company recently raised its annual profit outlook for the second time in two months, reflecting stronger aerospace performance.

Senior has also postponed its £40m share buyback programme, roughly $54m, amid the takeover discussions.