Adaptive Biotechnologies: $2.19M sale proposed

Available on EDGAR 11/12/2026 - 08:56 AM EST Accepted by SEC EDGAR 11/12/2026 - 08:56 AM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Adaptive Biotechnologies Corp. (ADPT) common shares are the subject of a proposed sale of 73,221 shares, with an aggregate market value of $2,192,236.74 and an approximate sale date of November 11, 2026. Chad Robins is identified as the officer for whose account the securities are to be sold, while the remarks state that all shares are to be sold by the Robins Nest Family Foundation. Goldman Sachs & Co. LLC is listed as broker.

Key Figures

Proposed common shares for sale: 73,221 shares Aggregate market value: $2,192,236.74 Common shares outstanding: 161,876,694 shares +4 more

7 metrics

Proposed common shares for sale 73,221 shares Approximate sale date: November 11, 2026

Aggregate market value $2,192,236.74 Proposed sale

Common shares outstanding 161,876,694 shares Number listed in the securities information

Common shares sold 321,324 shares Sale by Chad M. Robins on August 17, 2026

Gross proceeds $7,959,195.48 Sale by Chad M. Robins on August 17, 2026

Common shares sold 278,676 shares Sale by Chad M. Robins on August 18, 2026

Gross proceeds $6,844,282.56 Sale by Chad M. Robins on August 18, 2026

Key Terms

Aggregate Market Value, Founder's Shares, Gross Proceeds

3 terms

Aggregate Market Value financial

"Aggregate Market Value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Founder's Shares financial

"Nature of Acquisition Transaction | Founder's Shares"

Gross Proceeds financial

"Amount of Securities Sold | Gross Proceeds"

The total amount of cash a company receives from a financing event or sale before any fees, expenses, taxes or deductions are taken out. Investors watch gross proceeds because it shows the raw scale of new capital being raised—think of it as the paycheck amount before withholdings—which helps assess how much funding is available for operations, growth, debt payoff or how much shareholder dilution might occur once costs are removed.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many ADPT shares are proposed for sale and at what value?

The proposed sale covers 73,221 common shares, with an aggregate market value of $2,192,236.74 and an approximate sale date of November 11, 2026. The remarks state that all shares are to be sold by the Robins Nest Family Foundation.

Who is selling the ADPT shares, and which broker is listed?

The remarks state that Robins Nest Family Foundation is to sell all the shares, and Goldman Sachs & Co. LLC is listed as broker. Chad Robins is identified as the officer for whose account the securities are to be sold.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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	0001780649
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	Chad 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	73221	2192236.74	161876694	11/11/2026	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	09/01/2009	Founder's Shares	The Issuer			73221	09/01/2009	None

* 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
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	08/17/2026	321324	7959195.48
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	08/18/2026	278676	6844282.56

144: Remarks and Signature

Remarks	All shares to be sold by the Robins Nest Family Foundation. Filing intended to be submitted on 11/11/2026. Unable to be submitted due to federal holiday.
Date of Notice	11/12/2026
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 Chad Robins
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)