Company: ADPT
Filing Date: 2025-04-29
Form Type: DEF 14A
Source: 0001193125-25-103752
Chunk: 3

Company: Adaptive Biotechnologies Corp
Filing Date: 2025-04-29
Form: DEF 14A
Chunk 3
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| Other Matters                                                  |     | 58 |

<div align='center'>**PROXY STATEMENT**</div>

**INFORMATION CONCERNING VOTING AND SOLICITATION

General

Your proxy is solicited on behalf of the board of directors of Adaptive Biotechnologies Corporation (“Adaptive,” the “Company,” “we,” “us” or “our”), a Washington corporation, for use at our 2025 Annual Meeting of Shareholders (the “Annual Meeting”) to be held on Tuesday, June 10, 2025, at 9:00 a.m., Pacific Time, or at any continuation, postponement or adjournment thereof, for the purposes discussed in this proxy statement, as well as any business properly brought before the Annual Meeting. Proxies are solicited to give all shareholders of record an opportunity to vote on matters properly presented at the Annual Meeting. The Annual Meeting will be held entirely via the Internet. To be admitted to and participate in the Annual Meeting, you must register prior to Friday, June 6, 2025, 5:00 p.m., Pacific Time at www.proxydocs.com/ADPT and enter the control number found on your proxy card, voting instruction form or Notice of Internet Availability of Proxy Materials you previously received. Upon completing your registration, you will receive further instructions via email one hour prior to the start of the Annual Meeting, including your unique link that will allow you access to the Annual Meeting. You will have the ability to submit questions prior to and during the Annual Meeting. Please be sure to follow instructions found on your proxy card and/or Voting Authorization Form and subsequent instructions that will be delivered to you via email.

Technical assistance will be available one hour prior to and during the Annual Meeting. Information related to technical assistance will be provided in the email with the sign-in instructions. We recommend that you log in at least 15 minutes before the Annual Meeting to ensure you are logged in when the Annual Meeting starts. You may vote during the Annual Meeting by following the instructions available on the meeting access email.

We have elected to provide access to our proxy materials over the Internet. Accordingly, on or about May 1, 2025, we are mailing a Notice of Internet Availability of Proxy Materials to most of our shareholders of record and we are mailing paper copies of the proxy materials to certain other shareholders of record. All shareholders will have the ability to access the proxy materials on the website referred to in the notice or request to receive a printed set