Rule 144: 18,672 RSUs Registered for Sale

Reported registration to sell 18,672 restricted stock units under Rule 144.

Rhea-AI Filing Summary

Reported registration to sell 18,672 restricted stock units under Rule 144. The filing lists the securities as Restricted Stock Units with an offering/filing date of 03/10/2026. The broker/filing agent is Morgan Stanley Smith Barney LLC.

Separately, the filing discloses prior open-market dispositions by Kyle Piskel: 2,145 shares sold on 02/04/2026 for $39,596.70 and 4,290 shares sold on 01/12/2026 for $77,220.00.

Insights

Securities Compliance Analyst

Rule 144 notice lists 18,672 RSUs to be sold; prior small sales by an insider are disclosed.

The filing records Restricted Stock Units identified for sale on 03/10/2026

Prior reported dispositions by Kyle Piskel total 6,435 shares across two transactions on 01/12/2026 and 02/04/2026. Cash‑flow treatment and whether sales are brokered or private are not specified in the excerpt.

FAQ

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

What does the Rule 144 filing for ADPT report?

It reports a filing to sell 18,672 Restricted Stock Units under Rule 144 with a filing date of 03/10/2026. The broker listed is Morgan Stanley Smith Barney LLC.

Who is listed as having sold shares recently in the ADPT filing?

Kyle Piskel is listed with two prior dispositions: 4,290 shares sold on 01/12/2026 for $77,220.00 and 2,145 shares on 02/04/2026 for $39,596.70.

Are the proceeds or buyer details provided in the ADPT excerpt?

The excerpt provides gross consideration amounts for two prior sales ($39,596.70 and $77,220.00) but does not identify buyers or describe proceeds distribution or recipient entities.

Does the filing disclose timing for when the 18,672 RSUs will be sold?

The filing lists the RSUs to be sold with an entry date of 03/10/2026, but the excerpt does not specify exact sale execution timing or methods beyond the listed date.

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

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Accepted by SEC EDGAR 03/16/2026 - 08:53 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	0001780662
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 Corp
SEC File Number	001-38957
Address of Issuer	1165 EASTLAKE AVE E SEATTLE WASHINGTON 98109
Phone	206-659-0067
Name of Person for Whose Account the Securities are To Be Sold	PISKEL KYLE
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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza, 8th Floor New York NY 10004	18672	271117.44	153981561	03/11/2026	NASDAQ

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	03/10/2026	Restricted Stock Units	Issuer			18672	03/10/2026	N/A

* 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
Kyle Piskel 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	02/04/2026	2145	39596.70
Kyle Piskel 1165 Eastlake Avenue East Seattle WA 98109	Common Stock	01/12/2026	4290	77220.00

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units on 3/4/2026.
Date of Notice	03/16/2026
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	/s/ Kyle Piskel
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)