Ottawa will be receiving Florida's No. 9 and No. 25 overall picks in this year's draft, a second-round pick in 2027, and a first-rounder in 2029.
Tkachuk, 26, will be joining his brother Matthew on the Panthers, who won back-to-back Stanley Cups (2024-2025).
Brady has played all eight years of his NHL career with the Senators and is coming off a 22-goal, 37-assist season.
The two USA Olympian brothers will now be on the same team as the Panthers look to rebound from a season in which they finished 40-38-4, missing the playoffs following their stellar Stanley Cup run.
Ottawa will now be looking towards the future as they receive the massive draft pick haul for their star player. The Senators were swept by the current Stanley Cup champion Carolina Hurricanes during the first round of the playoffs.
The two brothers helped lead Team USA to their third-ever Winter Olympics gold medal earlier this year, after taking down the powerhouse Canada.
Brady will become a massive boost for the Panthers as he has scored at least 20 goals and recorded 20 assists in every season he's been in the league (excluding the 2020-2021 COVID season).
Matthew finished this past season playing in only 31 games after suffering a hernia during the 4 Nations Face-Off Tournament and surgery for a torn adductor muscle. He has 101 goals and 187 assists in 242 games since joining the Panthers in 2022.