Using a professional transporter does not mean your goods are automatically insured.
If your business carries the financial risk in the goods while they are being transported, the goods should generally be insured under your own Goods in Transit policy, preferably on an all risks basis.
The transporter may have liability insurance, but that protects the transporter against claims for which it is legally liable. It is not a substitute for insuring your own goods.
If insured goods are lost or damaged, your Goods in Transit policy should respond to the insured loss subject to its terms, limits and excess. Your insurer can then pursue the transporter or another responsible party where there is a legal right of recovery.
The key question is therefore not “Does our transporter have insurance?”
It is “Are our goods insured under our own policy for their full value while they are in the transporter’s care and we carry the responsibility to insure?”