Mateusz Juroszek

CEO of STS

Juroszek took over as CEO of STS in 2012, at the age of 25, having previously worked in the business alongside his father. At the time, STS was primarily a land-based bookmaker with a strong retail presence but limited digital infrastructure.

Over the following years, he led an extensive modernization of the company, including the creation of its own in-house trading, CRM, and platform tools. STS became one of the first major Polish operators to invest heavily in proprietary technology and digital marketing.

Although the company retained its nationwide network of betting shops, Juroszek steered it toward an integrated retail–online model, with mobile and desktop channels generating a growing share of total turnover.

By 2020, STS had established a dominant position in Poland’s licensed betting market, with some estimates placing its share near 50%. That same year, it went public on the Warsaw Stock Exchange, with a valuation of approximately €800 million.

Acquisition of STS by Entain CEE

In July 2023, STS sold a 70% stake to Entain CEE, a joint venture between global operator Entain and Czech investment group EMMA Capital. The transaction valued the company at approximately £750 million, marking one of the largest exits in the history of Polish tech-enabled consumer businesses. Juroszek stepped down as CEO as part of the deal but remained active within the structure of the new ownership group.

He retained the role of Chairman of the Supervisory Board at STS Holding and took a seat on the board of Entain CEE, ensuring continuity in long-term planning and brand oversight. This transition allowed him to step back from day-to-day management while preserving influence over strategic direction.

Entry Into Gaming Innovation Group

Shortly after exiting STS operationally, Juroszek turned his attention to international investments. In July 2023, his family office MJ Investments, along with affiliated vehicles such as Betplay Capital and Juroszek Holding, acquired an 11.08% stake in Gaming Innovation Group (GiG).

The investment was based on a conviction that GiG — then undergoing internal restructuring — was undervalued in light of its earnings trajectory and growing exposure to regulated markets.

Over the following year, the Juroszek family steadily increased their stake, becoming the largest shareholder in the company with a position approaching or exceeding 25% by mid-2025. Their entry was seen as a signal of confidence in GiG’s long-term potential, particularly in the scalability of its affiliate business and the maturity of its B2B platform.

Board Membership at Gentoo Media

In May 2024, Juroszek joined the board of Gentoo Media, the rebranded affiliate division of GiG. The board role gave him direct access to the company’s strategic roadmap and commercial pipeline, including market expansion in North America and Latin America.

Since his entry, Gentoo Media has reported steady improvements in profitability and operating margins.

In parallel with his role at Gentoo Media, Juroszek remains active in other sectors through his position as CEO of MJ Investments and Supervisory Board Member at ATAL S.A., a listed real estate development company.