Yesterday BP plc, one of the oil majors broke the £100bn market value.
BP is a major UK company, in the same premier league as BT, the world’s leading telecommunications corporation, (www.bt.com)
The share price yesterday of BP was £5.011 a share.
The share capital of BP is 19,958,001,728 shares
https://otp.investis.com/clients/uk/bp_plc/rns/regulatory-story.aspx?cid=233&newsid=995631
Thus:
19,958,001,728 shares x £5.011 a share = £100,009,546,659.01
That is £100bn.