Richmond have confirmed a quartet of delistings following the 2022 season.
Aarts departs after a strong VFL campaign with the Tigers, with his time at Punt Road ending after 42 AFL appearances in three seasons.
Stack leaves the Tigers after four years in the yellow and black, having joined the club as an SSP recruit in 2019.
Collier-Dawkins managed 11 matches for Richmond after making his debut midway through last season.
Martyn departs the Tigers made also his debut in 2021, playing just three games after joining the club in 2019.
“We appreciated the hard work and commitment that Jake, Sydney, Will, and Riley put in across multiple years with us,” Richmond talent boss Blair Hartley said in a club statement.
“Each have played their part in our recent success, and we wish them all well for the future.”
Forward Matthew Parker also left the club midway through this season to return to his home state of Western Australia.