Fjärde AP-fonden, also known as AP4, is a key player in the finance sector, specifically within the Swedish pension system, and was founded in 2001. Based in central Stockholm, AP4 specializes in managing fund capital with a focus on Corporate Governance and Climate & the environment, aiming to maximize shareholder value and contribute to pension system stability. As of mid-2017, the fund managed assets worth SEK 348 billion across equities, fixed income, real estate, and alternative assets, and has been recognized internationally for its performance and climate risk efforts.