Cornerstone Investment Management acquired Ecowipes in 2023. The most technologically advanced bio-degradable wet wipes producer in Europe. An expert in bio-degradable consumer product solutions with three factories in Europe producing wet wipes, hygiene buds and cosmetic pads. Its differentiating qualities are its innovative and environment-friendly technologies such as its broad portfolio of biodegradable solutions, everything to reduce its carbon footprint and educating consumers and inspiring them to change their daily habits.

The consortium of Oaktree and Cornerstone Investment Management have created a Nationwide Veterinary Platform LuxVet Group to consolidate entities operating on this market in Poland in 2021 that also expanded into Romania in 2023.
The platform will consist of around 200 veterinary facilities - bringing together the best and most ambitious veterinarians and practice owners. Among the facilities LuxVet Group will also build modern veterinary hospitals of European standards in the largest cities (the first one to open in Warsaw by the end of 2024). The platform will focus on developments and bringing new standards of services in clinics, new technology, and give access to capital and modern medical knowledge.

Cornerstone Investment Management ran a cross border investment into a Pan European platform of vertically integrated mushroom producers in 2021. The investment was made into Okechamp in Poland and Lutece in the Netherlands. Currently Okechamp is the world's largest white mushrooms processor. The business trades its goods globally and generates EUR 200 million sales at the moment of investment.

The consortium of Oaktree and Cornerstone Investment Management acquired ProService in 2016. ProService is a market leader in providing technology services and solutions to mutual and pension funds, insurance companies, and banks. Provides Transfer Agent, Asset Valuation, Fund Distribution, Asset Management, Corporate Accounting, Manage Services, and IT Solutions. ProService Finteco HQ in Luxembourg, operates in Poland, the UK, Ireland, the Czech Republic, Germany, and Austria.

E-TOTO was established in 2011 and is Poland’s third largest betting company offering an online betting platform which is also available through multiple kiosks located across the country. Cornerstone Investment Management has held a stake in E-TOTO since 2014.

Rail Engineering, previously Bombardier Transportation (Rail Engineering) Polska, engages in design of rail control and signalling systems and engineering services. It is part of the Transportation, Rail Control Solutions segment acquired by Alstom from Bombardier in 2021. Cornerstone Investment Management holds a non-controlling stake in Rail Engineering since 2010.

Cornerstone Investment Management is a limited partner in Cornerstone Venture Partners which is an early-stage venture capital firm focused on B2B technology solutions, headquartered in New York and with offices in California and Israel.