Transnet has blacklisted seven companies implicated in fraud and corruption following forensic investigations conducted by the Special Investigating Unit (SIU).
The investigations uncovered a range of alleged irregularities, including financial misconduct, bribery, theft of company assets, collusion and the submission of false information during procurement processes.
As a result, the seven companies have been prohibited from conducting business with public sector entities for the next 10 years.
Transnet Port Terminals Chief Executive Jabu Mdaki said the move forms part of the state-owned company's efforts to strengthen governance and combat corruption within its operations.
In addition to the action taken against the companies, Transnet has initiated disciplinary proceedings against employees accused of colluding with the implicated firms.
The latest developments follow the suspension of four Transnet employees earlier this week over similar allegations of fraud and misconduct.
Transnet said it remains committed to rooting out corruption, holding those responsible accountable and safeguarding the integrity of its procurement and operational processes.