Philadelphia Insurance Companies is committed to exceeding our customers' expectations. To exceed expectations, we focus on continuous improvement in all aspects of our business regardless of the challenges. We believe this focus and consistency sets us apart from the competition.
Our customers expect us to be there for them when they need us. This commitment is served by our superior financial strength and results. PHLY ended 2015 with a 5.5% increase in gross written premiums to $3,066.2 million. Our net earned premium grew by 6.3% to $2,750.7 million. We also maintained our A.M. Best "A++" rating and ended the year with a combined ratio of 90.4%.
PHLY continues to evolve and grow in order to make sure we're providing the best products and services to our customers. One of our new solutions is a Surety Bond Direct portal to provide brokers with an online point-of-sale service. We also launched a new Integrated Tech product, which serves one of the fastest growing insurance segments over the last five years. Tapping into the growth of the breweries market, we introduced a Craft Brewery and Distillery product tailored to that industry. Additionally, PHLY acquired group accident and health managing general agent Allen J. Flood Companies to complement our schools, non-profits, sports and recreation, and other niche markets.
Serving our niche markets is made possible by employing some of the best talent in the industry. We earned a 96.3% overall customer satisfaction rating in 2015 thanks to our employees' commitment to go above and beyond. PHLY also received several customer service and Best Places to Work awards. In partnership with our employees and customers, PHLY reduced paper usage and funded the planting of 80,000 trees through a reforestation project in U.S. areas devastated by disasters.
It is through a true partnership with our employees, policyholders, and agents that PHLY continues to exceed expectations and deliver on our commitments.