Mia Drennan: Building a Billion-Pound Business from a Missed Promotion
Mia Drennan's ascent to founding a global finance giant began not with a grand plan, but with a professional slight. Passed over for a promised promotion at the Bank of New York in 2005, she channelled her frustration into entrepreneurship. Today, her company, GLAS (Global Loan Agency Services), stands as a testament to her resilience, valued at a minimum of £1 billion with offices spanning the UK, US, EU, Singapore, Hong Kong, and Dubai.
From Temping to Transactional Powerhouse
Drennan's career path was unconventional. Initially aspiring to be a fighter pilot—a role closed to women in the 1980s—she studied art and design before entering the workforce without a degree. Her journey started with handing out CVs in London's City district and office temping, which eventually led to pivotal roles at KPMG, Simmons & Simmons, and Citibank. At the Bank of New York Mellon, she built a multi-million dollar structured finance business in Europe, honing the expertise that would later fuel GLAS.
The Genesis of GLAS: Seizing Opportunity from Crisis
In the wake of the 2008 financial crash, Drennan spotted a critical gap in the market. As trust in traditional banks wavered, she envisioned an impartial, white-glove debt administration service to handle complex loan restructurings. In 2011, she and business partner Brian Carne invested £6,000 to launch GLAS, with Drennan funding her half via credit card due to depleted savings post-crash.
- Conducting 400 meetings in four months to secure the first deal.
- Facing scepticism from clients reluctant to be the first to trust a new venture.
- Scrambling to establish systems when a major bank threatened an audit.
Their breakthrough came in June 2012, when two prominent law firms mandated GLAS for a German transaction, a client relationship that endures today. By 2014, the company celebrated its first £1 million in revenue, a milestone Drennan discovered while on holiday in Portugal.
Overcoming Barriers and Championing Female Founders
Drennan's success places her among a rare group; only 144 women have built businesses exceeding £50 million in value. She highlights the persistent challenges female entrepreneurs face, recalling difficulties securing a £20,000 overdraft for her first venture. However, she emphasises that support networks like the Invest in Women taskforce and The SuperScalers are now more accessible, encouraging women to scale their ideas boldly.
"If female founders want to scale a business, they can and they should," Drennan asserts. "Give your idea a chance. The worst-case scenario is failure—but in America, multiple startups are seen as valuable experience."Legacy vs. Lifestyle: A Foundational Choice
Reflecting on her journey, Drennan advises aspiring entrepreneurs to decide early whether they seek a lifestyle business or a legacy company. While a lifestyle venture can offer a comfortable income and balance, building a legacy—like GLAS, which aims for a future public listing—requires a distinct, growth-oriented mindset. This clarity, she believes, is crucial for long-term success.
Now recognised as EY's 2025 Entrepreneur of the Year and contending for the global title, Mia Drennan's story underscores the power of perseverance, vision, and the willingness to back oneself against the odds.
