Series E investors got a ratchet guaranteeing $18.56 per share: <a href="http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;11&#x2F;10&#x2F;squares-s-1-of-ratchets-and-unicorn-valuations&#x2F;" rel="nofollow">http:&#x2F;&#x2F;techcrunch.com&#x2F;2015&#x2F;11&#x2F;10&#x2F;squares-s-1-of-ratchets-and...</a>