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XBiotech, Inc. (XBIT) Loss Submission Form

The Klein Law Firm announces that a class action complaint has been filed on behalf of shareholders of XBiotech, Inc. (NASDAQ: XBIT) who purchased shares between April 15, 2015 and April 20, 2017. The action, which was filed in the United States District Court for the Western District of Texas, alleges that the Company violated federal securities laws.

The complaint alleges that defendants made false and/or misleading statements and/or failed to disclose that: (1) the results of the Company’s European Phase III trial for the treatment of colorectal cancer with Xilonix were inconclusive; (2) the Company misrepresented the endpoint used in the European Study; (3) the Company’s claim of a 76% increase in improvement was misleading and represented a relative improvement rate; (4) ultimately, the Companies’ studies would not support the approval of the application with the EMA; and (5) as a result of the foregoing, Defendants’ statements about its business and operations were materially false and misleading at all relevant times.

Shareholders have until December 26, 2017 to petition the court for lead plaintiff status. Your ability to share in any recovery does not require that you serve as lead plaintiff. You may choose to be an absent class member.

Keep Me Informed

The Klein Law Firm does not share your information with others. There is no cost or obligation. This submission does not create an attorney-client relationship. If we believe that you might be an appropriate lead plaintiff, we will contact you to discuss whether to establish an attorney-client relationship.

This letter confirms that you have retained The Klein Law Firm to represent you as a named plaintiff in a shareholder action involving XBiotech, Inc.

We agree to advance all expenses in the litigation, which means that you are not liable to pay any of the expenses of the lawsuit, whether attorneys' fees or costs. Regardless of the result, we will never ask you to directly pay for any attorneys' fees or costs. Should we obtain a favorable result, we may ask the court to award us compensation to be paid by the defendants or as a portion of any class benefit, but, again, we will never ask you to directly pay any of the costs of this litigation.

As the client you are entitled to direct the litigation in any way you deem proper, and may at any time order us to dismiss the case or opt-out. Should you choose to do so, we will never ask you to reimburse us directly for any legal fees or expenses. During the course of this litigation, we may employ and/or work with other law firms to prosecute your case.

We look forward to representing you and other XBiotech, Inc. shareholders.

Sincerely,

The Klein Law Firm

Joseph Klein

AGREED: Sign Name Clear