Randi Zuckerberg is leaving Facebook to start her own social media company called RtoZ Media.

The sister of Facebook’s co-founder Mark Zuckerberg had gone on a maternity leave three months ago, and instead of returning to the company she submitted a letter of resignation, which you can see a copy of beneath this post.

Her letter included a summary of her accomplishments during her six years at Facebook:

When I think about the projects I’m most proud of during my six years at the company, they all have one
thing in common – they revolve around the intersection of traditional media & social technology:

. the ABC News/Facebook Presidential Primary Debate in 2008 (first network televised debate to
include social media)
. the CNN/Facebook Inauguration Partnership in 2009 (fueled a multi-billion dollar industry
around live streaming)
. The ABC/Facebook Live Election Night Coverage in 2010 (received an Emmy Nomination)
. The Davos/Facebook partnership which made The World Economic Forum accessible to millions
of people
. The launch of Facebook Live, culminating less than a year later in a Town Hall with President
Obama in 2011.

She subsequently Tweeted, “It is with mixed emotions that I announced my departure from Facebook today to launch my own initiative. More info soon… http://t.co/m3XpphA

Readers, do you think her departure makes some kind of statement about Facebook’s future?