Senate standing orders indicate:

The Senate and Senate committees shall not entertain any claim to withhold information from the Senate or a committee on the grounds that it is commercial-in-confidence, unless the claim is made by a minister and is accompanied by a statement setting out the basis for the claim, including a statement of any commercial harm that may result from the disclosure of the information.

You're a minister. You can make the claim, but you've got to set out the basis for the claim, including a statement of any commercial harm that may result.