Airbnb COO Belinda Johnson steps down

Airbnb COO Belinda Johnson, who joined the company in 2011, is stepping down from the position and joining the board of directors.

Why it matters: Johnson is the company's longest-serving executive, and Airbnb's executive changes are being closely watched as it gears up for a long-awaited IPO.

Go deeper: New York City is making Airbnb investors nervous pre-IPO