Santa Monica-based contextual advertising technology developer GumGum says it has acquired JustPremium, a rich media and video ad marketplace in Europe. Financial terms of the acquisition were not announced. JustPremium is based in Amsterdam, and has approximately 150 employees. According to GumGum, JustPremium's CEO, Eric Visser, becomes President of EMEA for GumGum. GumGum said that its 2021 revenues are on track to grow over 40% compared to last year, and the addition of JustPremium will help expedite that growth. The addition of the new company also helps GumGum expand into new markets including Germany, France, Spain, Netherlands, Belgium, Sweden, Denmark, and Mexico, according to the company. GumGum raised $75M in a funding round earlier this year from Goldman Sachs Growth.