ASIIF cooperates with independent asset management companies that specialize in sustainability investments. Internationally accepted description of Investment management is the professional management of various securities which include shares, bonds etc assets, for example real estate, to meet specified investment goals for the benefit of the investors. Investors may be institutions including insurance companies, pension funds, corporations etc. or private investors both directly via investment contracts and more commonly via collective investment schemes e.g. mutual funds.

The term asset management is often used to refer to the investment management of collective investments, whilst the more generic fund management may refer to all forms of institutional investment as well as investment management for private investors. Investment managers who specialize in advisory or discretionary management on behalf of private investors may often refer to their services as wealth management or portfolio management often within the context of so-called "private banking".

The Asset Management companies that ASIIF leads its clients are the world's leading institutions in this sector. Their clientele includes banks, insurance companies, pension funds, foundations and private clients and these companies execute systematic research to identify successful companies that meet sustainability criteria. Furthermore, the integration of these future-oriented criteria into the investment process provides investors with a high degree of security, transparency and an attractive return; these licensed asset management companies’ expertise is based on their own independent research and an active worldwide sustainability network.