Sesko has spent two seasons with Leipzig over the past two seasons and joined them in 2023 from Sister Club Salzburg.
In all games, he scored 39 goals in 87 games and had eight assists in total, including 27 of which he participated in 64 Bundesliga games.
Sesko is currently the top scorer under 23 in all competitions in Europe's top five leagues.
He leads the five of Real Madrid's Jude Bellingham and five Florian Wirtz, who joined Liverpool this summer from Bayer Leverkusen, initially at £100 million.
Sesko is one of the fastest strikers in the Bundesliga, reaching a top speed of 35.7 km/h, and with the help of his 6-foot-5 inch height, the shooter has the highest aerial success rate, winning 57.4% of the aerial performance.
Only six forwards have scored more goals in the Bundesliga over the past two seasons, although Sesko ranked 16th in expected goals and 14th in shooting percentage and 22nd in the opposition box.
He is also a long-range threat, with his shots accounting for 36.8% while 23.1% of his targets come from outside the box. Both are higher than any Bundesliga striker, scoring 12 or more last season.
Last season, he also became more versatile, with 9.7% of the touches being in the opponent's box – compared to 17% before the season – and he was involved in the wings and then back to midfield.
“Benjamin has a rare uplifting rhythm and physically dominant ability to make him one of the best young talents in football in the world,” said Manchester United football Jason Wilcox.
“We closely monitor Benjamin’s career; all our data analytics and research concluded that he has the qualities and personality he needed to thrive at Manchester United.
“Benjamin works under the guidance of Reuben and our amazing performance team and is joining the perfect environment to support him in reaching world-class potential.”