Sesko has spent the past two seasons in Germany with Leipzig, having joined them from sister club Salzburg in 2023.
He scored 39 goals in 87 games in all competitions, along with eight assists, with 27 of those coming in 64 Bundesliga appearances.
Sesko is the top goalscorer currently aged under 23 in Europe’s top five leagues, in all competitions.
He is one ahead of Real Madrid’s Jude Bellingham and five clear of Florian Wirtz, who joined Liverpool from Bayer Leverkusen for an initial £100m this summer.
Sesko was one of the fastest strikers in the Bundesliga, reaching a top speed of 35.7km/h – and, helped by his 6ft 5in stature, had the highest aerial success rate among strikers, winning 57.4% of aerial duels.
Only six forwards have scored more goals in the Bundesliga in the past two seasons, even though Sesko was 16th for expected goals, 14th on shots and 22nd on touches in the opposition box.
He is a threat from long range too, with 36.8% of his shots – and 23.1% of his goals – coming from outside the box. Both are higher than any Bundesliga striker to score 12 or more goals last season.
Last season he also became more of an all-rounder, with 9.7% of his touches coming in the opposition box – compared with 17% the season before – while he got involved more on both wings and further back into midfield.
“Benjamin possesses a rare combination of electrifying pace and the ability to physically dominate defenders, making him one of the most exceptional young talents in world football,” said Manchester United director of football Jason Wilcox.
“We have followed Benjamin’s career closely; all of our data analysis and research concluded that he has the required qualities and personality to thrive at Manchester United.
“Working under the guidance of Ruben and our excellent performance team, Benjamin is joining the perfect environment to support him to reach his world-class potential.”