Summerfest 2025 is bringing three weekends of music to Milwaukee, Wisconsin, taking place on June 19-21, June 26-28, and July 3-5 at Henry Maier Festival Park.

With a lineup spanning multiple genres and generations, the festival is a massive undertaking—and behind the scenes, some of the industry’s biggest agencies are shaping the roster.

We used Booking Agent Info’s music industry directory to research the agencies behind this year’s line-up.

Leading the charge is Wasserman, handling 19% of the lineup, including The Lumineers, Jason Mraz, and Natasha Bedingfield.

Not far behind is WME, which represents 14% of the lineup and includes artists like Hozier and Lainey Wilson.

Following closely is CAA with 13%, bringing legends like Chicago and rising stars like Nessa Barrett to the festival.

Making a strong impact is IAG with 10%, representing acts such as Def Leppard and Offset.

UTA follows with 8%, booking artists like Flo Milli and Dirty Heads, while MAC Agency has 6%, some of the artists they booked include BossMan Dlow and Real Boston Richey.

Reliant Talent Agency represents 4% of the lineup, bringing in acts like Ginuwine and Little Texas.

Paladin Artists (3%) is booking Social Distortion and CAKE, while The Neal Agency (3%) represents country artists Lauren Watkins and Riley Green.

Atlas Touring also claims 3%, with Dogpark and Art Fishing Club set to perform.

17% of the festival lineup is booked by a variety of other agencies and artists who handle their own bookings in-house.

It should be noted that we excluded 2 artists whom we didn’t have data.