Apple CEO Tim Cook has made a “substantial” donation to help fund a gay rights campaign in his home state of Alabama and two other Southern states.

The Human Rights Campaign's (HRC) Project One America seeks to increase rights for LGBT communities in Alabama, Arkansas and Mississippi.

“When Tim first learned about HRC's Project One America – our bold, comprehensive campaign to dramatically advance equality for LGBT Americans in Alabama, Arkansas and Mississippi – he said, 'I'm in,'” HRC said in an email to supporters. “Thanks to his generous personal financial investment in the program, together we will move the needle forward at the local and state level, tearing down misperceptions and providing concrete protections for those who need it most.”

Apple spokeswoman Kristin Huguet told the AP that Cook was donating his own money.

“It's a personal donation from Tim,” she said.

After ignoring rumors about his sexuality for years, Cook announced he was gay in October, making him the first openly gay CEO of a Fortune 500 company.

In a speech before his induction into the Alabama Academy of Honor, which honors the accomplishments of living Alabamans, Cook said that Alabama was moving too slowly on LGBT rights.