Indra Nooyi at the Fortune Most Powerful Women Summit. Photo: Paul Morigi/Getty Images for Fortune
Why it matters: As the fifth woman and second person of color on the current board, Nooyi adds diversity to Amazon's leadership at a time when big companies are under scrutiny for employing overwhelmingly white, male decision-makers. Former Walmart executive and current Starbucks COO Rosalind Brewer, who is a woman of color, was appointed earlier this month, and the first person of color to join Amazon's board was Myrtle Potter, a former Merck executive, who served from 2004–2009.
Editor's note: This story was corrected to show that Myrtle Potter was the first person of color to serve on Amazon's board of directors.