Jony Ive, a close creative collaborator with Apple Inc co-founder Steve Jobs whose iPhone and other designs fueled Apple's rise to a $1 trillion company, will leave later this year to form an independent design company.

Apple said Ive will continue work on its products at his new venture, but shares fell as much as 1.5% to $197.44 in after-market trading, wiping about $9 billion from the firm's value.

Ive spent nearly three decades at Apple, leading the design of the candy-colored iMacs that helped Apple re-emerge from near death in the 1990s to the iPhone, regarded by some experts as one of the most successful consumer products of all time.

"It's the most significant departure of somebody who was a core part of the growth story" under Jobs, said Ben Bajarin, analyst with Creative Strategies.

Ive joined Apple in 1992 and led Apple's design teams since 1996. He became chief design officer in 2015.

Ive's new company will be called LoveFrom, the Financial Times reported, quoting Ive as saying it would be based in California "for now". Ive told the newspaper he would work on Apple devices in addition to unspecified "personal passions" and non-Apple projects.

"I have the utmost confidence in my designer colleagues at Apple, who remain my closest friends, and I look forward to working with them for many years to come," Ive said.

Ive's departure comes amid falling iPhone sales, including a record drop in Apple's most recent quarter. Sales of some newer hardware products such as the Apple Watch and its wireless AirPods headphones are expanding, but Apple has turned its attention to growing its services business, which includes Apple Music and iCloud.

Reuters