The C$1.47 per share offer is fair, Jamie Horvat, director of global equities at M&G, told Reuters. M&G owns 12.8 percent of Dalradian.
The transaction also has the support of Blackrock Inc, which owns approximately 10.7 percent of Dalradian, Dalradian said in a statement.
The offer by Orion, a private equity mining firm based in New York, represents a 62 percent premium to Dalradian shares at close on June 20. The miner has a high-grade gold project in Northern Ireland.
(Reporting by Susan Taylor, Editing by Rosalba O'Brien)