Peer Koopmeiners: AZ Alkmaar’s Rising Star and Brother of Juventus Midfielder

Peer Koopmeiners, a 25-year-old Dutch professional footballer, is making a name for himself as a defensive midfielder for AZ Alkmaar. Born on May 4, 2000, in Amsterdam, Netherlands, Koopmeiners is also the younger brother of Teun Koopmeiners, who currently plays for Juventus FC. His career trajectory, marked by loans and consistent development, is now showing promising signs in the Eredivisie and the Conference League.

Early Career and Development

Koopmeiners began his youth career at AZ Alkmaar, joining in 2009 and spending nine years within their academy system. Prior to that, he was with Vitesse ’22 Castricum until 2009. He transitioned to senior football with Jong AZ in 2018, where he quickly became a key player, making 115 appearances and scoring 4 goals across four seasons.

His professional debut came on October 17, 2020, with Jong AZ, where he scored his first professional goal in a 3–2 defeat against Jong Ajax. Wikipedia He continued to impress, notably scoring a free-kick against FC Eindhoven on February 2, 2021, helping Jong AZ secure a 3–2 victory. Wikipedia

In June 2021, Koopmeiners was promoted to the first team at AZ Alkmaar.

Loan Spells and Recent Performance

Despite his promotion, Koopmeiners experienced loan spells to gain further playing time. He was first loaned to Excelsior in January 2023, followed by a move to Almere City in July 2023. Wikipedia

As of February 22, 2026, Koopmeiners has made 80 appearances for AZ Alkmaar, scoring 2 goals. Wikipedia He has also featured in the KNVB Cup and European competitions for the club. His current season (2025-26) has seen him make 38 appearances, scoring 2 goals. Wikipedia

Most recently, on February 19, 2026, Koopmeiners was in action for AZ Alkmaar in the first leg of the Conference League intermediate stage against FC Noah. Transfermarkt

International Career

Koopmeiners has represented the Netherlands at various youth levels, including the U15, U16 and U19 teams. He earned his first cap for the Netherlands U15 team in 2014. Wikipedia

Key Takeaways

• Peer Koopmeiners is a Dutch defensive midfielder currently playing for AZ Alkmaar.
• He is the younger brother of Juventus midfielder Teun Koopmeiners.
• Koopmeiners has progressed through the AZ Alkmaar academy and gained experience through loan spells.
• He is a regular participant in the Eredivisie and has featured in European competitions.