Adaptive Biotechnologies director sells 22,968 shares of stock

Adaptive Biotechnologies director Robert Hershberg reported an open-market sale of company stock.

Rhea-AI Filing Summary

Adaptive Biotechnologies director Robert Hershberg reported an open-market sale of company stock. On 12/10/2025, he sold 22,968 shares of Adaptive Biotechnologies common stock at a price of $16 per share.

Following this transaction, Hershberg now beneficially owns 46,722 shares of Adaptive Biotechnologies common stock, held directly. The filing identifies him as a director of the company and shows that the report was filed for a single reporting person.

Insider Trade Summary

Net Seller: 22,968 shares

Net Sell 1 txn

Insider HERSHBERG ROBERT

Role Director

Sold 22,968 shs ($367K)

Type	Security	Shares	Price	Value
Sale	Common Stock	22,968	$16.00	$367K

Holdings After Transaction: Common Stock — 46,722 shares (Direct)

FAQ

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

What insider transaction did Adaptive Biotechnologies (ADPT) report?

The company reported that director Robert Hershberg sold shares of Adaptive Biotechnologies common stock in an open-market transaction.

How many ADPT shares did director Robert Hershberg sell?

Director Robert Hershberg sold 22,968 shares of Adaptive Biotechnologies common stock.

At what price were the Adaptive Biotechnologies (ADPT) shares sold?

The reported sale price was $16 per share for the 22,968 shares of common stock.

How many Adaptive Biotechnologies (ADPT) shares does Robert Hershberg own after the transaction?

After the reported sale, Robert Hershberg beneficially owns 46,722 shares of Adaptive Biotechnologies common stock, held directly.

What is Robert Hershberg’s relationship to Adaptive Biotechnologies (ADPT)?

The filing lists Robert Hershberg’s relationship to Adaptive Biotechnologies as a director of the company.

Was this Adaptive Biotechnologies (ADPT) filing submitted by more than one insider?

No. The report indicates it is a Form filed by one reporting person, covering only Robert Hershberg.

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

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Accepted by SEC EDGAR 12/12/2025 - 07:11 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

HERSHBERG ROBERT

(Last) (First) (Middle)

C/O ADAPTIVE BIOTECHNOLOGIES CORPORATION

1165 EASTLAKE AVE E

(Street)

SEATTLE WA 98109

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Adaptive Biotechnologies Corp [ ADPT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
12/10/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/10/2025		S		22,968	D	$16	46,722	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Robert Hershberg by Kyle Piskel, Attorney-in-Fact	12/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.