Apple also said in its annual diversity and inclusion report that it had closed pay gaps over the last year by analysing salaries, bonuses and annual stock grants. It had also opened up its annual stock grants programme to retail employees for the first time.
As of June, Apple's overall US workforce was 56 percent white (up 2 percent from a year ago), 19 percent Asian (down 1 percent) 12 percent Hispanic (up 1 percent), and 9 percent black (up 1 percent).
Apple's workforce includes a pool of retail employees that Google and Facebook do not have. In Apple stores, blacks and Hispanics respectively comprised 12 percent and 17 percent of general employees, and 5 percent and 10 percent of the leadership.
At Alphabet Inc's Google unit, blacks and Hispanics respectively made up 2 and 3 percent of the overall workforce and 1 and 3 percent of its tech employees, little changed from last year.
At Facebook, blacks and Hispanics were respectively 2 and 4 percent of the workforce and 1 and 3 percent of tech employees.
Apple's global workforce was 32 percent women, up 1 percent from the end of June 2015. Women held 23 percent of technical positions, up 1 percent from a year ago, and 28 percent of leadership positions, unchanged from June last year.
Reverend Jesse Jackson, who confronted Apple Chief Executive Tim Cook in 2014 about the company's lack of diversity and unfair compensation, applauded its efforts to connect with engineers of colour through partnerships with historically black colleges and universities and scholarship organizations.
"They are clearly setting the pace, making measurable progress for three consecutive years. They've acted with intention, not just aspiration," Jackson said in a statement.
Amazon Inc, which employs a large number of workers at distribution centres, reported late last year that its ethnic diversity exceeded the US average, with a global workforce that was 21 percent black, 13 percent Hispanic, 11 percent Asian and 5 percent other ethnicities.
In management positions at Amazon, however, representation dropped to 4 percent for blacks and Hispanics, 3 percent for other races, and climbed to 20 percent for Asians.
© Thomson Reuters 2016