Collins is a family-owned American forest products company that began in operations July 28, 1855.

He and five others, including his brother, Joseph Van Halen (JV) Collins, bought a steam mill and timber from John Alexander.

Before TD Collins died in 1914, he owned, along with others, a large number of sawmills in the Tionesta Valley of Pennsylvania, over 60,000 acres (240 km2) of timberland, the Tionesta Manufacturing Company, the Nebraska Box Mill, the Mayburg Chemical Plant, plus over 100 miles (160 km) of logging railroad, 41 miles (66 km) of main line, 25 locomotives, several oil companies, and a bank.

Collins has committed to being responsible partners in land and resource management with a policy of change through leadership.

[2] By adopting The Natural Step principles, Collins is working towards bringing sustainability to all their business operations.