=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: text/html; charset=utf-8
Date: Wed, 14 Feb 2018 03:19:38 GMT
Server: nginx/1.13.3
Set-Cookie: instapage-variant-333259=A; Path=/; Expires=Wed, 14 Feb 2018 12:05:14 GMT
Vary: Accept-Encoding
Vary: Accept-Encoding
Via: 1.1 google
Connection: Close

Request headers
================
HEAD /research-unicorn-companies HTTP/1.1
Host: www.cbinsights.com
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept: */*
Referer: http://51.15.134.16
Connection: close


Link is valid.