*Club domestic league appearances and goals, correct as of 22:26, 20 December 2024 (UTC) ‡ National team caps and goals, correct as of 23:12, 17 November 2024 (UTC)
Vermeeren made his professional debut for Royal Antwerp as a second half substitute in the 2022–23 UEFA Europa Conference League at home in Antwerp at the Bosuilstadion in a 2–0 second leg win against Lillestrøm SK on 11 August 2022.[3][better source needed] He told the media after his debut that he could not imagine a better debut.[4] He received praise from coach Mark Van Bommel who was quoted as saying “Arthur is a smart footballer, a fun guy to work with. He is eager to learn and show he can play. So he will get some playing time. He enjoyed it, I think. It's nice to see."[5]
In April 2023, Vermeeren was a starter in the 2023 Belgian Cup Final as Antwerp defeated KV Mechelen 2–0.[6] On 14 May, he scored his first goal for Antwerp in a 3–2 win over Club Brugge during the Champions' play-off.[7]
2023–24 season
On 23 July 2023, Vermeeren was a starter in the Belgian Super Cup as Antwerp defeated KV Mechelen on penalty kicks.[8] On 19 September, he made his Champions League debut in a 5–0 defeat against Barcelona.[9] On 13 December, he scored his first Champions League goal in a 3–2 victory in the return leg against the same opponent.[10] Vermeeren was awarded Man of the Match for his performance and told reporters in the post-match interview: "Today, a dream came true. I am very happy and I hope I have made my family proud."[11] Vermeeren ended his season at Antwerp with 8 G/A in 32 games in all competitions. Prior to his departure from the club, he made 64 consecutive starts across all competitions for the club, playing 99.4% of the available minutes during that run.[12]
Atlético Madrid
On 26 January 2024, Vermeeren joined La Liga club Atlético Madrid on a six-and-a-half-year contract.[13] The deal reportedly included a €18 million transfer fee, with up to €5 million in add-ons, and Royal Antwerp keeping a 10% sell-on clause.[14]
Loan to RB Leipzig
On 26 August 2024, Vermeeren joined Bundesliga club RB Leipzig on a season-long loan, with an obligation to buy once certain conditions were met.[15]