ADPT affiliate files Form 144 to resell 10,000 shares

ADPT affiliate reported proposed resale of Common Stock under Form 144.

Rhea-AI Filing Summary

ADPT affiliate reported proposed resale of Common Stock under Form 144. The cover lists 10,000 shares associated with a broker, an aggregate figure of $148,400, and 153,981,561 shares outstanding as of 04/08/2026. The filing also lists multiple recent dispositions by Harlan Robins, including sales on 02/02/2026, 02/03/2026, 03/02/2026, and 03/03/2026 totaling several reported share amounts and proceeds.

Insights

Securities Compliance Analyst

Form 144 is a routine affiliate resale notice that lists proposed sales and recent dispositions.

Form 144 notifies the market of proposed resales by an affiliate and discloses broker details, the number of shares presented for resale, and recent transactions by the reporting person. The filing excerpt lists 10,000 shares tied to a broker and multiple executed sales by Harlan Robins with per‑trade proceeds.

Because this is a resale/affiliate disclosure, the action is administrative: the extent and timing of future sales depend on holder decisions and broker execution. Subsequent SEC filings may show completed transactions or updated quantities.

Key Figures

Proposed resale: 10,000 shares Aggregate amount (cover line): $148,400 Shares outstanding: 153,981,561 shares +4 more

7 metrics

Proposed resale 10,000 shares listed with broker Goldman Sachs & Co. LLC

Aggregate amount (cover line) $148,400 cover-line figure associated with the 10,000-share entry

Shares outstanding 153,981,561 shares as of <date> 04/08/2026

Sale example 32,273 shares sold for $600,732.85 on 02/02/2026 by Harlan Robins

Sale example 2,395 shares sold for $44,130.99 on 02/02/2026 by Harlan Robins

Sale example 14,233 shares sold for $235,073.65 on 03/03/2026 by Harlan Robins

Sale example 10,000 shares reported disposition on 03/02/2026 for $157,239 by Harlan Robins

Key Terms

Form 144, Restricted Stock Units, NASD, Broker

4 terms

Form 144 regulatory

"144: Securities To Be Sold (Form 144 resale notice)"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Restricted Stock Units financial

"Acquired as compensation -- Restricted Stock Units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

NASD regulatory

"04/08/2026 | NASD"

The NASD (National Association of Securities Dealers) was the self‑regulatory organization that created and enforced rules for broker‑dealers and supervised trading conduct, functioning like a referee for the securities industry. For investors, its role mattered because those rules and oversight aimed to reduce fraud, ensure fair dealing and maintain confidence in markets—factors that influence the safety of investments and the reputation and behavior of brokerage firms.

Broker market

"Goldman Sachs & Co. LLC 200 West Street New York NY 10282"

A broker is a licensed professional or firm that helps investors buy and sell financial assets by executing trades on their behalf, acting like a marketplace agent or matchmaker between buyers and sellers. Brokers matter to investors because they provide access to markets, handle order execution and paperwork, and can offer research or advice—services that affect trade speed, costs, and the quality of investment decisions.

FAQ

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

What does ADPT's Form 144 disclose about proposed sales?

The filing lists a proposed resale of 10,000 shares tied to a broker and an aggregate line of $148,400. It serves as a notice of an affiliate’s intent to sell, with execution subject to broker and market activity.

Who reported recent stock dispositions in the ADPT excerpt?

Harlan Robins is named with several reported sales on specific dates, including transactions on 02/02/2026, 02/03/2026, 03/02/2026, and 03/03/2026, showing share counts and proceeds for each trade.

How many ADPT shares were outstanding per the filing?

The excerpt lists 153,981,561 shares outstanding as of 04/08/2026. That number appears on the cover line and provides a company share baseline in the filing excerpt.

What sale examples are shown for Harlan Robins in the filing?

Examples include 32,273 shares for $600,732.85 on 02/02/2026 and 14,233 shares for $235,073.65 on 03/03/2026. The filing lists multiple dated trades with share counts and proceeds.

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

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Accepted by SEC EDGAR 04/08/2026 - 04:58 PM Learn about SEC filing dates

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	10000	148400	153981561	04/08/2026	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	03/06/2023	Acquired as compensation -- Restricted Stock Units	The Issuer			10000	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	02/02/2026	2395	44130.99
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/02/2026	10000	157239
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/02/2026	32273	600732.85
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/03/2026	515	9960
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/03/2026	7605	144288.14
Harlan Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/03/2026	14233	235073.65

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 10b5-1(c).
Date of Notice	04/08/2026
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)