Stronger Together

Mill Rock Packaging is a specialty packaging growth platform. The partnership was launched to invest in growth oriented companies with advanced service and product capabilities in the consumer packaging industry.

All Packaging Company

Founded in 1946 and based in Aurora, CO, All Packaging Company is a leading designer and manufacturer of custom paperboard folding cartons for multiple consumer end markets. With a focus on the end-user's shopping and buying experience, All Packaging bring a deeper level of service to its customers' packaging needs. The company's folding cartons offer brand owners the ability to create a wide variety of customized structures that add visual appeal and strengthen brand messaging, while being consumer, retailer and Earth-friendly. All Packaging operates facilities in Aurora and Salt Lake City, UT.


Impressions Incorporated

Impressions, based in St. Paul, MN and founded in 1967 , is a market leader in the design, engineering and production of high-end paperboard packaging and commercial printing products for a variety of end markets. The company’s core offering spans a broad range of high-end, ecofriendly, customized folding cartons for consumer staples, pharmaceuticals, health and beauty and other daily-use products. Impressions offers lithographic printing and a host of value-added services, including product engineering, prototyping and post-print production. The company operates state-of-the-art production facilities in St. Paul and Hutchinson, MN.


Keystone Paper & Box Company

Keystone, based in South Windsor, CT and founded in 1944, is a leading high-end paperboard packaging company focused on premium, multi-SKU, design-intensive packaging solutions and related services. The company's core offerings span a broad range of high-performance, sustainable, customized folding cartons for food and beverages, pharmaceuticals, health and beauty and other daily-use products. With the latest technology, high-speed machinery and three generations of packaging design and production experience, Keystone produces high-quality packaging that meets the most stringent requirements.


Trojan Lithograph Corporation

Founded in 1950 and based in Renton, WA, TrojanLitho is one of the largest converters of specialty paper packaging in the Pacific Northwest. The company provides high-end, graphic packaging to various consumer markets. TrojanLitho offers a diverse suite of premium, sustainable paper packaging, including single-face litho laminate, folding carton, retail ready and more. The company's differentiated "end-to-end" service offering includes program development, design and engineering, pre-press, finishing and logistics, as well as the flexibility to handle both short and long production runs. These capabilities help blue chip and emerging brands stand out in the marketplace, meet complex retailer specifications, manage SKU volatility, increase speed to market, reduce costs and minimize environmental impact.