The licensing watchdog, which represents companies such as Microsoft, Adobe and Symantec, has pursued the name and shame policy over the past few months, publishing the names of offenders even after companies have agreed financial settlements.
The policy has prompted legal experts and user bodies to urge firms to exercise extreme caution when dealing with the BSA.
The latest miscreant, Bausch and Lomb, an eye care company based in Scotland, was using software without having purchased sufficient licences to cover the use, the BSA said.
Mike Newton, programme manager for the BSA in the UK, reiterated the organisation's call for companies to audit their PCs and tally up the software being used against the licence agreements they have.
"Aside from the fact that it is illegal for companies to use unlicensed software, it is also a very inefficient way of running a business," he said. "The illegal software on this particular company's system was not even necessary to the company, which has since deleted it from its network."