PAKENHAM Livestock Exchange was broken into last week.
Offenders smashed a window to gain access to the office of the Kooweerup Road business between noon on Wednesday 8 May and 5.40am on Thursday 9 May.
A small amount of cash was stolen from the property.
Anyone with information should contact Cardinia Crime Investigation Unit on 5945 2500 or Crime Stoppers on 1800 333 000.