Adaptive Biotechnologies Corp SEC Filing

ADPT insider Harlan Robins has filed a notice of proposed common stock sales under Rule 144.

Accepted by SEC EDGAR 02/02/2026 - 05:26 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

ADPT insider Harlan Robins has filed a notice of proposed common stock sales under Rule 144. The filing covers the planned sale of 34,668 shares of common stock through Goldman Sachs & Co. LLC, with an aggregate market value of $637,544.52, listed for trading on NASD. These shares are part of a broader compensation history where Robins acquired 17,220 restricted stock units on 03/04/2022, 17,170 on 03/04/2021, and 278 on 03/06/2023, all from the issuer as compensation. In the past three months, he has already sold several blocks of common stock, including 10,000 shares on 11/10/2025 for $148,213, 27,212 shares on 12/03/2025 for $506,428.93, 10,000 shares on 12/04/2025 for $166,125, and 10,000 shares on 01/06/2026 for $164,412.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001780851
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Adaptive Biotechnologies Corporation
SEC File Number	001-38957
Address of Issuer	1165 Eastlake Avenue East Seattle WASHINGTON 98109
Phone	1-206-659-0067
Name of Person for Whose Account the Securities are To Be Sold	Harlan Robins
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	Goldman Sachs & Co. LLC 200 West Street New York NY 10282	34668	637544.52	152665188	02/02/2026	NASD

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	03/04/2022	Acquired as compensation -- Restricted Stock Units	The Issuer			17220	03/04/2022	Compensation
Common Stock	03/04/2021	Acquired as compensation -- Restricted Stock Units	The Issuer			17170	03/04/2021	Compensation
Common Stock	03/06/2023	Acquired as compensation -- Restricted Stock Units	The Issuer			278	03/06/2023	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	11/10/2025	10000	148213
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	01/06/2026	10000	164412
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	12/03/2025	27212	506428.93
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	12/04/2025	10000	166125

144: Remarks and Signature

Remarks	The sales of shares set forth herein are made in connection with a selling plan dated 8/11/2025, that is intended to comply with Rule 10b501(c).
Date of Notice	02/02/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/11/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Goldman Sachs & Co. LLC on behalf of Harlan Robins
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)