Filed by: NantKwest, Inc.
Pursuant to Rule 425 under the Securities Act of 1933 and deemed filed
pursuant to Rule 14a-12 under the Securities Exchange Act of 1934
Subject Company: NantKwest, Inc.
Commission File No.: 001-37507
The following
letter was mailed to certain stockholders of NantKwest, Inc. on March 2, 2021:
March 1, 2021
Dear
Stockholder:
We recently delivered to you a proxy statement of NantKwest, Inc. (NantKwest) wherein your support is requested, for among other
matters, the proposal to approve the merger contemplated by the Agreement and Plan of Merger, dated as of December 21, 2020, by and among NantKwest, Nectarine Merger Sub, Inc. and ImmunityBio, Inc. (the Merger Proposal) as
detailed in the proxy statement. We urge your support for all the proposals to be voted upon at the special meeting of stockholders to be held on March 8, 2021 at 9:30 a.m. Pacific Time in virtual format. As of the date of this letter,
your shares of NantKwest remain unvoted.
The NantKwest Special Committee and the NantKwest Board of Directors recommend that stockholders vote
FOR each of the proposals being submitted to a vote at the NantKwest special meeting of stockholders.
Please Vote Your
NantKwest Shares Today!
Regardless of the number of shares you own your vote is very important. We encourage all stockholders to have their voices
heard. The approval of the Merger Proposal requires the affirmative vote of holders of a majority of all of the outstanding shares of NantKwest common stock as of the NantKwest record date, other than shares of NantKwest common stock held by certain
NantKwest significant stockholders or any of their respective controlled affiliates or any directors or executive officers of NantKwest or ImmunityBio as described in the proxy statement. Failure to vote or a vote to abstain will have the same
effect as a vote against the Merger Proposal.
There are three ways to vote your shares of NantKwesteach only taking a few moments:
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By Telephone Stockholders in the United States can submit their vote by calling 866-249-5381 to submit your proxy instructions at any time before the NantKwest special meeting; please have your control number located on the enclosed vote instruction form
available when calling;
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By Internet Stockholders can submit their vote via internet at www.proxyvote.com at any time before
the NantKwest special meeting; please have the control number located on the enclosed vote instruction form available; or
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By Mail Stockholders can vote by mail by signing, dating and returning the enclosed vote instruction form
in the postage-paid envelope provided.
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If you need assistance in voting your shares or have questions regarding the special meeting of
stockholders, please contact NantKwests proxy solicitor, MacKenzie Partners, Inc., at (800) 322-2885 (toll-free) or (212) 929-5500 (collect), or email at
proxy@mackenziepartners.com.
We thank you for your continued support of NantKwest.
Sincerely,
NantKwest, Inc.