Background: Optus is Australia's second-largest telco and serves more than 10 million customers across mobile, broadband, and enterprise services. The company has been fully owned by Singtel since 2001, when Singtel acquired Optus for $17.5 billion.

What happened: After more than two decades of full ownership, Singtel has now revealed that it is actively looking for a "meaningful minority" investor in Optus. The company is seeking a partner to take a stake in the business while maintaining Singtel's broader ownership position.  

What else: The move comes after a difficult few years for Optus, including:

• A cyberattack that exposed the data of nearly 10 million current and former customers
  
• Triple-0 network failures linked to deaths
• A $100 million ACCC penalty for selling mobile plans to vulnerable customers who could not afford them

Singtel now appears to be looking for meaningful minority"partner with both deep pockets and political credibility to share the load.

What's the key learning?

💡 A minority stake sale means selling less than 50% of a company to an outside investor. The buyer gets exposure to the upside, while the existing owner still keeps control of the business. For Singtel, it's a way to bring in fresh capital and local credibility without fully handing over Optus.  

💡 Similar to Telstra, Optus also owns assets like towers, fibre, and data infrastructure that could potentially be monetised separately. Telstra, for example, sold a 49% stake in its mobile towers business for $2.8 billion in 2021. So infrastructure assets can sometimes be more valuable than the consumer brand itself.

💡 While infrastructure is attractive...  minority deals can also be difficult to structure. Buyers may like the stable, infrastructure-style cash flows and captive customer base, but Singtel still needs to find someone willing to write a very large cheque without receiving control or veto rights.