INSIDER TRADING POLICY

Adopted by the Board of

Directors [●], 2024

Table of Contents

Section 1. All Employees, Officers, Directors and their Family Members and Affiliates Are Subject to this Policy.

This Insider Trading Policy (“Policy”) applies to all employees, outside directors, officers, and consultants of Adaptive Biotechnologies Corporation, a Washington corporation (“Adaptive” or the “Company”), their family members and entities over which such individuals have or share voting or investment control. This Policy also applies to any other person who receives material nonpublic information from any Adaptive insider or is otherwise designated by the Compliance Officer (as appointed per Section 12 of this Policy). Adaptive is also subject to Appendix I of this Policy to ensure fair practices when Adaptive transacts in securities. For purposes of this Policy, “family members” include people who live with you, or are financially dependent on you, and also include those whose transactions in securities are directed by you or are subject to your influence or control.

This Policy continues to apply following termination of employment or other relationship with Adaptive until after the second trading day that any material non-public information in your possession has become public or is no longer material. Each employee, officer, consultant and director is personally responsible for the actions of their family members and other persons with whom they have a relationship who are subject to this Policy, including any pre-clearances required.

Section 2. Trading in Adaptive Securities While in Possession of Material Nonpublic Information is Prohibited.

The purchase or sale of securities by any person who possesses material nonpublic information is a violation of U.S. federal and state securities laws. It is important to avoid the appearance, as well as the fact, of trading based on material nonpublic information.

No person subject to this Policy who is aware of material nonpublic information relating to Adaptive may, directly or indirectly (through family members, other persons, entities or otherwise) buy, sell, or otherwise trade in the securities of Adaptive, or advise anyone else to do so, other than pursuant to a trading plan that complies with Rule 10b5-1 promulgated by the Securities and Exchange Commission (“SEC”) or as specifically exempted in Section 9(B) of this Policy, or otherwise engage in any action to take personal advantage of that information. For purposes of this Policy, the term “trade” includes any transaction in Adaptive securities, including gifts and pledges.

Each person subject to this Policy may, from time to time, be required to forego a proposed transaction upon learning new material nonpublic information even if he or she planned to make the transaction before learning such information, even though the employee may suffer economic loss or forego anticipated profit by waiting.

Section 3. Trading in Other Public Companies’ Securities While in Possession of Material Nonpublic Information is Prohibited.

No person subject to this Policy who possesses material nonpublic information relating to other publicly traded companies, including our vendors, customers and partners, as a result

of employment with Adaptive or the performance of services on our behalf, may, directly or indirectly (through family members, other persons, entities or otherwise) buy or sell securities of such companies, or advise anyone else to do so, or otherwise engage in any action to take personal advantage of that information.

Section 4. Certain Types of Transactions Are Prohibited.

Section 5. Sharing Material Nonpublic Information is Prohibited.

No person subject to this Policy who possesses material nonpublic information relating to Adaptive or any other publicly traded companies may directly or indirectly (through family members, other persons, entities or otherwise) pass that information on to others outside the

Company, including friends, family, or other acquaintances (referred to as “tipping”) until such information has been disseminated to the public. You must treat material nonpublic information about our business partners with the same care required with respect to such information related directly to Adaptive.

Tipping includes passing information under circumstances that could suggest that you were trying to help another profit or avoid a loss. Exercise care when speaking with others who do not “need to know”, even if they are subject to this Policy, as well as when communicating with family, friends and others not associated with Adaptive. To avoid the appearance of impropriety, refrain from discussing our business or prospects or making recommendations about buying or selling our securities or the securities of other companies with which we have a relationship. Inquiries about Adaptive should be directed to our Corporate Communications, Investor Relations, or Legal teams.

Section 6. Recommendations Regarding Trading in Company Securities are Prohibited.

No person subject to this Policy may make recommendations or express opinions on trading in Adaptive securities while in possession of material nonpublic information, except to advise others not to trade in Adaptive securities if doing so might violate the law or this Policy.

Section 7. Only Designated Company Spokespersons Are Authorized to Disclose Material Nonpublic Information.

U.S. federal securities laws prohibit the Company from selectively disclosing material nonpublic information. Adaptive has established procedures for releasing material information in a manner that is designed to achieve broad dissemination of the information immediately upon its release. Employees may not, therefore, disclose material nonpublic information to anyone outside the Company, including family members and friends, other than in accordance with those established procedures. Any inquiries about the Company should be directed to our Corporate Affairs and Communications and Investor Relations teams. Additionally, the Legal team is responsible for handling legal matters that may involve certain disclosures.

Section 8. Employees Must Follow Company Guidelines Pertaining to Electronic Communications.

Employees must follow the Adaptive Disclosure and Regulation FD Policy before participating in any Internet electronic communication forums concerning the Company.

Section 9. Other Transactions in Company Securities.

Section 10. Directors, Officers and Certain Named Employees Are Subject to Additional Restrictions.

Section 11. Policy Violations Must Be Reported.

Any person who violates this Policy, the Company’s Disclosure and Regulation FD Policy or any federal or state laws governing insider trading, or knows of any such violation by any other person, must report the violation immediately to the Compliance Officer. Upon learning of any such violation, the Compliance Officer will determine whether the Company should release any material nonpublic information or whether the Company should report the violation to the SEC or other appropriate governmental authority.

Section 12. Insider Trading Compliance Officers.

Unless the Board of Directors provides otherwise, the Company’s General Counsel (“General Counsel”) shall act as the Company’s initial Insider Trading Compliance Officer; provided, however, that if the General Counsel is a party to a proposed trade, transaction or inquiry relating to this Policy, the Company’s [Chief Executive Officer] shall act as the Insider Trading Compliance Officer (“Compliance Officer”) with respect to such proposed trade, transaction or inquiry. The Compliance Officer may delegate his or her authority to act as the Compliance Officer as he or she deems necessary or appropriate in his or her sole discretion. The duties of the Compliance Officer and his or her delegees may include the following:

Section 13. Definition of “Material Nonpublic Information”

the total mix of the information in the marketplace about Adaptive. In simple terms, material information is any type of information which could reasonably be expected to affect the market price of Adaptive securities or an investor’s decision to buy or sell Adaptive securities. Both positive and negative information may be material. While it is not possible to identify all information that would be deemed material, the following information ordinarily would be considered material:

purposes of this Policy, information will be considered public after the close of trading on the second full trading day following the Company’s widespread public release of the information.

Section 14. Adaptive May Suspend All Trading Activities by Employees.

In order to avoid any questions and to protect both employees and the Company from any potential liability, from time to time Adaptive may impose a “blackout” period during which some or all employees may not buy or sell Adaptive securities. The Compliance Officer will impose such a blackout period if, in his or her judgment, there exists nonpublic information that would make trades by Adaptive employees (or certain employees) inappropriate in light of the risk that such trades could be viewed as violating applicable securities laws. If you are made aware of such a blackout period, do not disclose its existence to anyone.

Section 15. Violations of Insider Trading Laws or This Policy Can Result in Severe Consequences.

Section 16. This Policy Is Subject to Revision.

Adaptive may change the terms of this Policy from time to time to respond to developments in law and practice, and will take steps to inform all affected persons of any material changes.

Section 17. All Persons Must Acknowledge Their Agreement to Comply with This

Policy.

The Policy will be available on the Company’s internal website, delivered to all persons

subject to this Policy upon adoption, and to all new other persons at the start of their employment or relationship with the Company. Upon first receiving a copy of the Policy or any revised versions, each such person must sign an acknowledgment that he or she has

received a copy and agrees to comply with the Policy’s terms. The Compliance Officer may periodically require written certifications by those subject to this Policy, including as to their compliance with this Policy or to refresh their acknowledgment of and agreement to comply with this Policy. Any acknowledgment and agreement hereunder will constitute consent for Adaptive to impose sanctions for violation of this Policy and to issue any necessary stop- transfer orders to the Company’s transfer agent to enforce compliance with this Policy.

APPENDIX I

Policy Regarding Company Transactions in Securities

Section 1. General Statement. The board of directors (the “Board”) of Adaptive Biotechnologies Corporation (the “Company”) recognizes the importance of adhering to fair practices when the Company transacts in securities. As the “ultimate insider” with respect to information regarding the Company, and as an investor when transacting in securities for its own account, the Company may find itself in circumstances that could raise insider trading, market manipulation, or other deceptive or unfair practices. The Company’s policy is to comply with all laws applicable to its transactions in securities, to avoid the appearance of impropriety in connection with its transactions, and to ensure appropriate Board oversight of such transactions. While this policy describes the Company’s general approach to the main anticipated circumstances in which it will transact in securities, this policy applies to any direct or indirect transaction by or for the benefit of the Company. In grey areas, management of the Company is expected to seek direction from the Board and its legal and financial advisors, and to develop a thoughtful compliance strategy.

Section 2. Equity Awards. Equity awards (“Equity Awards”) under the Company’s equity compensation plans (“Equity Plans”), including stock options, stock appreciation rights, restricted stock, or restricted stock units (including performance-based restricted stock and restricted stock units), must generally be granted (a) during open trading windows, and (b) more than four business days before, and more than one business day after, the Company’s release of earnings for the most recently completed fiscal period or filing with the SEC of an annual report on Form 10-K, quarterly report on Form 10-Q, or current report on Form 8-K that discloses material nonpublic information (each, an “SEC Report”). As administrator of the Equity Plans, the Compensation Committee of the Board and any of its designees may determine that special circumstances require different timing, provided that such exceptions comply with all applicable law. Equity Awards may not be backdated or otherwise manipulated. When Equity Awards are granted in a number intended to approximate an aggregate dollar value, due regard shall be given as to whether the per share price used in such calculations reasonably reflects fair market value. The release of material nonpublic information may not be timed or otherwise manipulated with the intent of affecting the value of an Equity Award.

Section 3. Share Repurchases. Any repurchases of the Company’s securities will be approved by the Board in the context of the Company’s then-existing financial condition and general market conditions. While the Board may approve any repurchase structure consistent with applicable law, the Board anticipates that Company share repurchases would generally be made pursuant to a Rule 10b5-1 trading plan, comply with Rule 10b5-18, and be administered by an independent third- party broker-dealer reasonably satisfactory to the Board. The Company will not establish a Rule 10b5-1 trading plan at a time when the Company possesses material nonpublic information. In addition, the Company will generally announce the size, time horizon, method of repurchase, and other material terms of a Company repurchase program before commencing repurchases, and the timing of repurchases will generally avoid the four business days before, and the business day after, the planned filing of any SEC Report. The Company will generally suspend sale transactions by directors and executive officers while Company repurchases are pending; when such

suspensions are impracticable or would impose an undue hardship on directors and officers, the Company will generally avoid repurchase dates in the two days prior to anticipated sales by directors or executive officers. The release of material nonpublic information may not be timed or otherwise manipulated with the intent of affecting the repurchase price of the Company’s securities in a repurchase transaction.

Section 4. Offerings of the Company’s Securities. Any offers and sales of the Company’s securities in a public offering, private offering, strategic transaction, or similar circumstances will be approved by the Board in the context of the proposed transaction. In any such transaction, the Company’s disclosure to the applicable purchasers must not contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they are made, not misleading. The Company will comply with all applicable laws relating to the offer and sale of securities. The Company will generally suspend purchases and sales of securities by directors and executive officers a reasonable period before and after the Company’s transactions. Material nonpublic information disclosed in connection with a sale of Company securities will be so disclosed sufficiently in advance of the sale for the purchaser to digest the information.

Section 5. Purchases or Sales of Securities of Other Issuers. The Company will maintain an investment policy related to securities purchased or sold for its account, overseen by the Audit Committee of the Board. Such transactions will generally be conducted by an independent registered broker-dealer, who will certify compliance with the investment policy to the Audit Committee of the Board each quarter.

If the Company obtains material nonpublic information regarding a vendor, distributor, strategic partner or other company, the Company will take reasonable steps to safeguard such information and to avoid trading in the securities of the applicable company until such time as the Company reasonably concludes the information is either publicly known or no longer material.

Section 6. Controls and Procedures. The Company will maintain disclosure controls and procedures regarding its transactions in securities, including internal control over financial reporting. Without limiting the foregoing, the Company shall ensure there are appropriate controls and procedures regarding:

APPENDIX II

Special Restrictions on Transactions in Company Securities by Insiders

To minimize the risk of apparent or actual violations of the rules governing insider trading, we have adopted these special restrictions relating to transactions in our securities by Insiders. Insiders are responsible for ensuring compliance with this Appendix II, including restrictions on all trading during certain periods, by family members and members of their households and by entities over which they exercise voting or investment control. Insiders should provide each of these persons or entities with a copy of this Policy.

Section 1. Trading Window. Any trade by an Insider that is subject to this Policy will be permitted only during an open “trading window.” Even when the window is open, all Company personnel are prohibited from trading in Adaptive securities while in possession of material nonpublic information. The trading window generally opens following the close of trading on the second full trading day following the public issuance of the Company’s earnings release for the most recent fiscal quarter and closes at the close of trading on the 16th day of the last month of a fiscal quarter. In addition to when the trading window is scheduled to be closed, the Company may impose a special blackout period at its discretion due to the existence of material nonpublic information. The Compliance Officer may advise Insiders when the trading window opens and closes; provided that in any event, Insiders are charged with the knowledge of and compliance to this Policy.

Section 2. Trade Pre-Clearance Required. As part of this Policy, all purchases and sales of equity securities of the Company by Insiders, other than transactions that are not subject to this Policy or transactions pursuant to a Rule 10b5-1 trading plan (a “10b5-1 Plan”) authorized by the Compliance Officer, must be pre-cleared by the Compliance Officer. This requirement is intended to prevent inadvertent Policy violations, avoid trades involving the appearance of improper insider trading, facilitate timely Form 4 reporting by Section 16 Insiders and avoid transactions that are subject to disgorgement under Section 16(b) of the Exchange Act.

Requests for pre-clearance must be submitted via email to the Compliance Officer at least two business days in advance of each proposed transaction. If the Insider does not receive a response from a Compliance Officer within 24 hours, the Insider must follow up to ensure that the message was received. Each Insider request for pre-clearance should include the nature of the proposed transaction and the expected date of the transaction. In addition, each request by a Section 16 Insider for pre-clearance should also include the following information:

The Compliance Officer may withhold or condition pre-clearance in his or her sole discretion. Once the proposed transaction is pre-cleared, the Insider may proceed with it on the approved terms, which will generally require the transaction to occur within 4 trading days unless a longer or shorter period is specified by the Compliance Officer. The Insider must comply with all other securities law requirements, such as Rule 144 and prohibitions regarding trading on the basis of inside information, and with any special trading blackout imposed by the Company prior to the completion of the trade.

Section 3. Pre-Clearance of Rule 10b5-1 Plans Required. Pre-clearance by the Compliance Officer is required for an Insider to enter into or modify a 10b5-1 Plan. Plans that are not pre-cleared may not be used by an Insider. Pre-clearance must be requested at least five full trading days prior to entry into or modification of the plan. However, pre-clearance will not be required for individual transactions effected pursuant to a pre-cleared Rule 10b5-1 trading plan. All Section 16 Insiders must immediately report the results of transactions effected under a trading plan to the Compliance Officer since they will be reportable on Form 4 within two business days following execution. Notwithstanding the foregoing, any 10b5-1 Plan for the Compliance Officer shall be subject to pre-clearance by the [Chief Executive Officer].

Section 4. Hardship Exemptions. The Compliance Officer may, on a case-by- case basis, exempt a transaction by an Insider from this Policy due to financial or other hardship. Any request for a hardship exemption must be in writing and must describe the amount and nature of the proposed transaction and the circumstances of the hardship. The Insider requesting the hardship exemption must also certify to the Compliance Officer he or she is not in possession of material nonpublic information concerning Adaptive or (such as in the case of a gift or other non-monetization transaction to a party who promises not to sell the securities received for some time or to a party subject to this Policy) that the transaction does not misuse the Company’s information. The existence of this process does not in any way obligate the Compliance Officer to approve any hardship exemption requested by an Insider, and all Insiders are cautioned that this exemption is intended to address limited and unusual circumstances.

Section 5. Brokers. All Insiders must ensure that their broker does not execute any transaction for the Insider (other than under a pre-cleared Rule 10b5-1 Plan) until the broker has verified with the Compliance Officer that the transaction has been pre-cleared.

Section 6. Reporting of Transactions Required. To facilitate timely reporting under Section 16 of the Exchange Act, Section 16 Insiders are required to on the same day as the trade date, or, with respect to transactions effected pursuant to a Rule 10b5-1 Plan, on the day the Insider is advised of the terms of the transaction, (a) report the details of each transaction to the Compliance Officer and (b) arrange with persons whose trades must be reported by the Insider under Section 16 (such as immediate family members living in the Insider’s household) to immediately report directly to the Company and to the Insider the following transaction details:

The transaction details must be reported to the Compliance Officer, with copies to Adaptive personnel who will assist the Section 16 Insider in preparing his or her Form 4.

Section 7. Oversight by the Audit Committee. The Audit Committee (the “Committee”) of the Board of Directors will be responsible for monitoring and recommending any modification to this Policy, if necessary or advisable, to the Board of Directors. The Board of Directors will also review, at least annually, those individuals who are deemed to be executive officers for purposes of Section 16.

Section 8. Named Employees Considered Insiders. The Committee will review, at least annually, those individuals deemed to be “Insiders” for purposes of this Appendix II. Insiders shall include persons subject to Section 16 and such other persons as the Committee deems to be Insiders. Generally, Insiders shall be any person who by function of their employment is consistently in possession of material nonpublic information or performs an operational role, such as head of a division or business unit, that is material to the Company as a whole.

Section 9. Special Guidelines for 10b5-1 Trading Plans. Notwithstanding the foregoing, an Insider will not be deemed to have violated this Policy for transactions pursuant to a 10b5-1 Plan that has been pre-cleared by the Compliance Officer. The Compliance Officer may withhold or condition pre-clearance of any proposed 10b5-1 Plan (each, a “Proposed Plan”) for any reason, in his or her sole discretion.

EXHIBIT A INSIDER EMPLOYEES

(as of [●], 2024)