Berihu Aregawi was the bronze medalist in the 10,000 metres at the 2018 World U20 Championships in Tampere behind Rhonex Kipruto and Jacob Kiplimo.

[1] On 8 June 2021, he finished third in the Ethiopian trial behind Selemon Barega and Yomif Kejelcha in the 10,000 m to effectively seal his place at the delayed 2020 Tokyo Olympics.

[1] In February 2023, he won the silver medal on a 10 km course at the World Cross Country Championships in Bathurst, Australia with a time of 29:26.

[8][9] He ran the fifth-fastest track 5000m time in history when running 12:40.45 to win the Diamond League event in Lausanne in June 2023.

This time places Berihu as the third fastest 3000 metre runner in history, behind Daniel Komen, who held the previous world record of 7:20.67, and Ingebrigtsen.