21-year-old defender Nelhage has signed a contract that extends until June 30, 2027.
"It's never fun to leave a place you care so much about, but I'm looking forward to trying something new and getting a new challenge in my career," she says in a press release.
Curmark agrees with the feeling of sadness about leaving the club.
"I'll miss going out on Bravida Arena," she says in a press release.
Nelhage, who is moving to Lyon, is joining the French giant with, among other things, eight Champions League titles – the most on the women's side.
"The future lies ahead of her, and we wish her all the best in her continued endeavors. She has all the qualities I see as important in a center-back," said Häcken's sports manager Christian Lundström about Nelhage's transfer.
Curmark is moving to Italian Fiorentina, which is fighting at the top of the Italian league and is currently in fourth place.
When Curmark's transfer to Fiorentina was made public, Häcken's sports manager Christian Lundström added:
"We're selling another player to a top team in Europe. Filippa has been a key player and team captain for several years, and this is a natural step for her and her career."