ADPT insider sells large blocks of common stock

Chad M. Robins reported proposed and recent transactions in Common Stock under a Form 144.

Rhea-AI Filing Summary

Chad M. Robins reported proposed and recent transactions in Common Stock under a Form 144. The filing lists multiple individual sales and proposed sales of common stock, including transactions in February–April 2026. Examples in the filing include a sale of 99,225 shares for $1,589,941.71 on 02/27/2026 and a sale of 96,323 shares for $1,546,542.82 on 03/02/2026. The document is a notice of proposed sale by an affiliate and lists several executed dispositions in the prior three months.

Insights

Insider Transaction Analyst

Routine affiliate disposition filings showing multiple discrete sales over Feb–Apr 2026.

The filing lists a sequence of share dispositions by Chad M. Robins, with individual sale sizes ranging from several thousand shares to six-figure share lots. The largest single reported sale in the excerpt is 99,225 shares for $1,589,941.71 on 02/27/2026.

These entries are transaction notices rather than commentary on company operations; cash-flow recipients are the selling holder(s). Subsequent SEC filings or Form 4 summaries may provide consolidated post-transaction holdings if available.

Key Figures

Sale 02/27/2026: 99,225 shares Sale 03/02/2026: 96,323 shares Multiple 41,666-lot sales: 41,666 shares (repeated) +2 more

5 metrics

Sale 02/27/2026 99,225 shares sale for $1,589,941.71 on 02/27/2026

Sale 03/02/2026 96,323 shares sale for $1,546,542.82 on 03/02/2026

Multiple 41,666-lot sales 41,666 shares (repeated) several sales around Feb–Apr 2026 with amounts like $653,647.87 and $603,273.68

Form type Form 144 Notice of proposed sale by an affiliate

Sale 03/03/2026 48,631 shares sale for $752,258.35 on 03/03/2026

Key Terms

Form 144, Founder's Shares, Securities To Be Sold, Common Stock

4 terms

Form 144 regulatory

"Filer Information | | | 144: Filer Information"

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.

Founder's Shares market

"Common Stock | 09/01/2009 | Founder's Shares"

Securities To Be Sold regulatory

"144: Securities To Be Sold"

Common Stock market

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

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What does ADPT Form 144 from Chad M. Robins report?

The filing reports proposed and recent sales of Common Stock by Chad M. Robins. It includes specific sale entries and proposed dispositions with share counts and gross sale amounts dated February–April 2026.

How many shares did Chad M. Robins sell on 02/27/2026 according to the filing?

On 02/27/2026 the filing shows a sale of 99,225 shares for $1,589,941.71. This figure appears as one of the largest single transactions in the excerpt.

Does the Form 144 show multiple transactions in March 2026?

Yes. The filing lists several March 2026 entries, including a 96,323-share sale for $1,546,542.82 on 03/02/2026, plus other smaller dispositions recorded in March.

Is Form 144 an authorization to sell or a notice of proposed sale?

Form 144 is a notice of proposed sale by an affiliate under resale rules. It notifies of intended or recent dispositions rather than granting approval or describing use of proceeds.

Do the amounts listed represent net proceeds to the issuer?

The dollar amounts shown are gross values associated with the selling holder's transactions. The filing does not state that the issuer receives proceeds; the listed amounts are proceeds tied to the selling holder.

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	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	37263	552982.92	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	09/01/2009	Founder's Shares	The Issuer			37263	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	03/02/2026	41666	653647.87
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	04/06/2026	41666	603273.68
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/02/2026	41666	762950.29
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/02/2026	41666	660993.59
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/02/2026	41666	774225.11
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/02/2026	41666	767821.05
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/27/2026	99225	1589941.71
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/02/2026	41666	655964.5
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/27/2026	83666	1334138.04
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	04/06/2026	41666	597515.44
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/02/2026	96323	1546542.82
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/02/2026	67703	1056383.45
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/03/2026	4452	71681.21
Chad M. Robins 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	03/03/2026	48631	752258.35

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 Chad Robins
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)