One of the larger insurance companies in the UK is the insurance company Legal & General. Another of the larger insurance companies is the company Aviva.

Many companies are subsidiaries of larger companies.

There is a reason why larger companies are so successful; they are reliable. Smaller companies tend to be unreliable and of a lower quality (which is why they never expand into larger companies). You get what you pay for.

mcdonalds

Not all companies have business directories. Most small businesses do not have them. You will find more larger companies tend to have them.