[18] On April 16, 2014, Kohl announced an agreement to sell the franchise to New York City hedge-fund investors Marc Lasry and Wesley Edens.

[19] The NBA then informed the Bucks that the franchise wouldn't be allowed to renew their lease on the Bradley Center, which would expire after the 2017–18 season, and that the team needed to have either a new arena completed or under construction by the beginning of 2018, or the franchise would be bought from Lasry and Edens, then sold to another ownership group, either in Las Vegas or Seattle, which would mean the certain departure of the Bucks from Milwaukee.

[23] Unlike Marquette's previous agreement with the Bradley Center, the lease agreement with Fiserv Forum ends in the spring of 2025, allowing Marquette the option to decide to pursue the building of its own smaller arena for lesser-attended match-ups, and to only utilize the Fiserv Forum for larger Big East Conference and Badgers-Golden Eagles rivalry games.

On December 22, 2019, the Bucks had their 50th consecutive sellout at the Forum, the longest such streak in franchise history, which started on November 16, 2018.

[35] On July 26, 2018, the Bucks agreed to a 25-year naming rights deal with Fiserv, a financial services technology company based in the Milwaukee suburb of Brookfield.

[citation needed] On December 28, 2021, Fiserv Forum held its first ice hockey games with the inaugural Holiday Face–Off tournament.

[38][39] The arena also continues a Milwaukee tradition for being the site of the New Year's Eve game for the Harlem Globetrotters, with 2020 being the only pause in decades.

[42] The arena is intended to be the focal point of a "live block" zone that includes public space surrounded by both commercial and residential development.

[43] Initial renderings of the arena showed a transparent facade and a curved roof and side meant to evoke the water forms of nearby Lake Michigan and the Milwaukee River.

[44] "Herb Kohl Way" was unveiled on the plaza outside of Fiserv Forum on August 26, 2018, to pay tribute to the former Bucks owner for his contributions leading up to the building of the arena.

[45] The plaza is home to restaurants and a beer garden, where people can gather year-round to watch sporting events on a large, outdoor television.

"[46] In February 2019, Johnson Controls unveiled a three-dimensional statue of their logo placed outside the Fiserv Forum, which can glow in multiple colors at night, and will specifically turn green after every Bucks victory.

Fiserv Forum holds 17,500 people and has fewer luxury suites, but more club seating than the BMO Harris Bradley Center.

The Bucks are contractually bound not to recruit current tenants of the Panther Arena to move their events to the Fiserv Forum.