Adaptive Biotechnologies (NASDAQ: ADPT) insider reports Rule 10b5-1 stock sales

Rhea-AI Filing Summary

Adaptive Biotechnologies Corporation filed to sell common stock held by insider Susan Bobulsky through a brokerage account at Morgan Stanley Smith Barney LLC, with sales conducted under a Rule 10b5-1 trading plan. Recent reported transactions include multiple open-market sales of common shares on NASDAQ between June and July 2026.

Key Figures

Shares sold 07/16/2026: 5,000 shares Proceeds 07/16/2026: $115,000.00 Shares sold 06/04/2026: 11,000 shares +5 more

8 metrics

Shares sold 07/16/2026 5,000 shares 10b5-1 Sales of common stock on 07/16/2026 for $115,000.00

Proceeds 07/16/2026 $115,000.00 10b5-1 Sales of 5,000 common shares on 07/16/2026

Shares sold 06/04/2026 11,000 shares 10b5-1 Sales of common stock on 06/04/2026 for $198,000.00

Proceeds 06/04/2026 $198,000.00 10b5-1 Sales of 11,000 common shares on 06/04/2026

Shares sold 06/11/2026 5,000 shares 10b5-1 Sales of common stock for $95,000.00 on 06/11/2026

Proceeds 06/11/2026 $95,000.00 10b5-1 Sales of 5,000 common shares on 06/11/2026

Shares sold 06/25/2026 5,000 shares 10b5-1 Sales of common stock for $102,500.00 on 06/25/2026

Shares sold 07/01/2026 487 shares 10b5-1 Sales of common stock for $10,714.00 on 07/01/2026

Key Terms

Form 144, 10b5-1 Sales, Restricted Stock Units, Common

4 terms

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

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.

10b5-1 Sales regulatory

"10b5-1 Sales for SUSAN BOBULSKY 1165 Eastlake Avenue East"

10b5-1 sales are pre-arranged stock-trading plans that let company insiders automatically buy or sell shares according to a fixed schedule or formula, even if they later learn confidential information. Think of it as setting up an automatic thermostat for trades: it creates a clear, documented path that can protect insiders from insider-trading accusations and gives investors a signal about predictable insider activity—though it can also simply be a way for insiders to diversify or raise cash.

Restricted Stock Units financial

"03/04/2023 | Restricted Stock Units | Issuer"

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.

Common financial

"Common | 07/16/2026 | 5000 | 115000.00"

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Available on EDGAR 07/30/2026 - 04:38 PM Accepted by SEC EDGAR 07/30/2026 - 04:38 PM Learn about SEC filing dates

FAQ

What does Adaptive Biotechnologies (ADPT) disclose in this Form 144?

Adaptive Biotechnologies reports a planned sale of common stock by insider Susan Bobulsky, executed through Morgan Stanley Smith Barney LLC and structured under a Rule 10b5-1 trading plan, with recent NASDAQ sales in June and July 2026.

How many ADPT shares did Susan Bobulsky sell on 07/16/2026?

On 07/16/2026, Susan Bobulsky sold 5,000 shares of Adaptive Biotechnologies common stock for proceeds of $115,000.00. This sale was reported as a 10b5-1 Sales transaction in the Form 144 filing.

What ADPT stock sales occurred on 06/04/2026 under the 10b5-1 plan?

On 06/04/2026, a 10b5-1 Sales entry reports the sale of 11,000 shares of Adaptive Biotechnologies common stock, for total proceeds of $198,000.00, as disclosed in the Form 144 filing for insider Susan Bobulsky.

What earlier 2023 grant is referenced in the ADPT Form 144?

The Form 144 references Restricted Stock Units dated 03/04/2023, issued by the company as equity compensation. These RSUs are linked to the common stock position that is now being partially sold through the reported transactions.

Are the ADPT insider sales made under a Rule 10b5-1 plan?

Yes. Each transaction line is labeled 10b5-1 Sales for Susan Bobulsky, indicating the sales were executed pursuant to a pre-arranged Rule 10b5-1 trading plan rather than discretionary, one-off market decisions.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	1299	29305.44	160044392	07/30/2026	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	03/04/2023	Restricted Stock Units	Issuer			1299	03/04/2023	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
10b5-1 Sales for SUSAN BOBULSKY 1165 Eastlake Avenue East Seattle WA 98109	Common	07/16/2026	5000	115000.00
10b5-1 Sales for SUSAN BOBULSKY 1165 Eastlake Avenue East Seattle WA 98109	Common	07/01/2026	487	10714.00
10b5-1 Sales for SUSAN BOBULSKY 1165 Eastlake Avenue East Seattle WA 98109	Common	06/25/2026	5000	102500.00
10b5-1 Sales for SUSAN BOBULSKY 1165 Eastlake Avenue East Seattle WA 98109	Common	06/11/2026	5000	95000.00
10b5-1 Sales for SUSAN BOBULSKY 1165 Eastlake Avenue East Seattle WA 98109	Common	06/04/2026	11000	198000.00

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

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