In strictly technical terms, no LLC can sell shares. Ownership in an LLC, or limited liability company, is based on a percentage of the company not by the number of shares owned. That's true for single member LLCs and multiple member LLCs. This is why the first thing when you go to investors, they want to know how you are incorporated. If you are doing an equity raise, they want to see an S or C corp, and will usually be okay if you're one of the new B or Benefit corps, but most investors won't do business with an LLC and will force you to change your status in order to receive funding.
That's why finding CIG USA is an LLC is so jolting, but as others have explained, it is really CIG Europe doing the raise.