The firm has focused its investments in companies operating in the aerospace, defense, business service, consumer, distribution, food, restaurant, franchising, industrial and healthcare sectors.

Investors in Sentinel Funds include college and university endowments, foundations, state and government retirement systems, corporate pension plans, insurance companies, sovereign wealth funds, investment advisors, family offices, and Taft-Hartley plans located in the United States, Europe, China, Japan, Australia, and the Middle East.

[19] Sentinel and Triartisan Capital Partners acquired TGI Fridays in 2014 from Carlson a month after the company facing a nationwide collective action wage theft lawsuit.

[27][28] The firm has previously invested in franchise holders of some of the world's largest fast food chains such as Checkers and Rally's, Church's Chicken, Pizza Hut and Taco Bell.

[29][30] Other past holdings include Colson Group, The Cin Group, Critical Solutions International, Driven Performance Brands, Hollander Sleep Products, Luminaires, Marketplace Events, National Spine and Pain Centers, Playcore, Power Products, Quick Weight Loss Centers, Revenew, RotoMetrics, and WellSpring Pharmaceutical.