Software giant WiseTech's value has plummeted after its headquarters were visited by Australian Federal Police investigating alleged improper trading by four employees.

Billionaire executive chairman Richard White and three others were the subject of a joint probe by the AFP and the Australian Securities and Investments Commission on Monday.

The company revealed the raid in a statement to the ASX on Tuesday morning.

"They executed a search warrant requiring the production of documents regarding alleged trading in WiseTech shares by Richard White and three WiseTech employees during the period from late 2024 to early 2025," the statement read.

"So far as WiseTech is aware, no charges have been laid against any person and there are no allegations against the company itself.

"WiseTech int

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