Sky News has learnt that ICG (LSE: 138026.L – news) – also known as Intermediate Capital Group – has tabled an offer to buy a sizeable stake in Argus, which is one of the UK’s biggest privately owned companies. ICG, which provides private debt, credit and equity across a range of industries, is an unexpected interloper into what has become one of the City’s most hotly contested auctions so far this year