Steadfast CEO and MD Robert Kelly has "chosen to stand aside" on a temporary basis while an investigation is carried out into a workplace complaint against him.

Mr Kelly will remain on full pay for the duration of the "external investigation".

"Given that the investigation into the allegations against Mr Kelly is ongoing, and that to date no allegations against him have been substantiated, it would not be appropriate to comment further at this time," Steadfast said in a statement to the Australian Securities Exchange.

"The board will provide further details to the market once this investigation is completed.

"The board has appointed Tim Mathieson, CEO Australasian broking to the role of acting chief executive Officer, effective immediately and [he] will continue in that role until the conclusion of the investigation."

As reported by insuranceNEWS.com.au, Steadfast entered a trading halt this morning.