Company: ADPT
Filing Date: 2025-04-29
Form Type: DEF 14A
Source: 0001193125-25-103752
Chunk: 74

Company: Adaptive Biotechnologies Corp
Filing Date: 2025-04-29
Form: DEF 14A
Chunk 74
---
 for shareholders and cost savings for companies. This year, a number of banks and brokers with account holders who are our shareholders will be householding our proxy materials. A single proxy statement will be delivered to multiple shareholders sharing an address unless contrary instructions have been received from the affected shareholders. Once you have received notice from your bank or broker that it will be householding communications to your address, householding will continue until you are notified otherwise or until you revoke your consent. If, at any time, you no longer wish to participate in householding and would prefer to receive a separate proxy statement and annual report, please (1) notify your bank or broker, (2) direct your written request to: 1165 Eastlake Avenue East, Seattle, Washington 98109 or (3) request from us by calling (206) 659-0067.Shareholders who currently receive multiple copies of the proxy statement at their address and would like to request householding of their communications should contact their bank or broker. Other Matters As of the date of this proxy statement, the board of directors knows of no business, other than that described in this proxy statement, that will be presented for consideration at the 2025 Annual Meeting. If any other business comes before the 2025 Annual Meeting or any adjournment or postponement thereof, proxy holders may vote their respective proxies at their discretion.

| By order of the board of directors,                                                       |
| Clarice McCauley                                                                          |
| Interim General Counsel, Corporate Secretary and Vice President, Chief Compliance Officer |
| Seattle, Washington                                                                       |
| April 29, 2025                                                                            |

58

| P.O. BOX 8016, CARY, NC 27512-9903 |

| Adaptive Biotechnologies Corporation                                     
 For Shareholders of record as of April 15, 2025                          
 Tuesday, June 10, 2025 9:00 AM, Pacific Time                             |     | 1-866-390-5390                                                                                                  |     | Internet:   www.proxypush.com/ADPT   •   Cast your vote online   •   Have your Proxy Card ready   •   Follow the simple instructions to record your vote 
 Phone:                                                                                                                                                   |
|:-------------------------------------------------------------------------|:----|:----------------------------------------------------------------------------------------------------------------|:----|:---------------------------------------------------------------------------------------------------------------------------------------------------------|
| The Annual Meeting will be held entirely via the Internet - Please visit |     | •