[2] On 22 August 2022, Šimkus signed a two-year contract with Slovenian PrvaLiga side Mura.
[3] He made his debut against Gorica on 2 September 2022 in a goalless draw.
[4] On 5 July 2023, Šimkus signed a contract with his hometown club Šiauliai.
[5] Šimkus made his Lithuania national football team debut on 17 November 2018 in a 2018–19 UEFA Nations League C game against Romania.
This biographical article relating to Lithuanian football is a stub.