Impinj director sells $139K in stock at $173

IMPINJ INC (PI) director Miron Washington reported a sale of 800 shares of Common Stock on September 15, 2026 in an open market or private transaction at $173.26 per share.

Rhea-AI Filing Summary

IMPINJ INC (PI) director Miron Washington reported a sale of 800 shares of Common Stock on September 15, 2026 in an open market or private transaction at $173.26 per share. Following this transaction, he directly holds 4,354 shares of IMPINJ Common Stock. No Rule 10b5-1 trading plan is reported for this sale.

Insider Trade Summary

Net Seller: 800 shares

Net Sell 1 txn

Insider WASHINGTON MIRON

Role Director

Sold 800 shs ($139K)

Type	Security	Shares	Price	Value
Sale	Common Stock	800	$173.26	$139K

Holdings After Transaction: Common Stock — 4,354 shares (Direct)

Key Figures

Shares sold: 800 shares Sale price per share: $173.26 per share Approximate transaction value: $138,608 +1 more

4 metrics

Shares sold 800 shares Common Stock sale reported for September 15, 2026

Sale price per share $173.26 per share Price for the 800 shares of Common Stock sold on September 15, 2026

Approximate transaction value $138,608 800 shares sold at $173.26 per share

Shares owned after transaction 4,354 shares Director’s direct holdings of IMPINJ Common Stock following the sale

Key Terms

Common Stock, open market or private transaction, Rule 10b5-1

3 terms

Common Stock financial

"800 shares of Common Stock sold and 4,354 shares held after"

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.

open market or private transaction financial

"Sale in open market or private transaction on September 15, 2026"

Rule 10b5-1 regulatory

"No Rule 10b5-1 trading plan is reported for this sale"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

FAQ

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

What insider transaction did PI report for Miron Washington on this Form 4?

The Form 4 reports that director Miron Washington sold 800 shares of IMPINJ INC Common Stock on September 15, 2026 in an open market or private transaction, leaving him with a reported 4,354 shares held directly after the sale.

At what price were the 800 PI shares sold by the director?

The 800 IMPINJ INC (PI) shares were sold at a reported $173.26 per share. This reflects a transaction value of approximately $138,608 for the sale, based on the share count and reported per-share price.

How many PI shares does Miron Washington own after this reported sale?

After the reported sale, director Miron Washington directly owns 4,354 shares of IMPINJ INC Common Stock. This post-transaction holding is stated in the Form 4 as the total shares following the transaction.

Was the PI insider sale by Miron Washington under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as affirmative, and there is no indication in the data that the September 15, 2026 sale of 800 shares was made under a Rule 10b5-1 trading plan.

What role does Miron Washington hold at IMPINJ INC (PI)?

The Form 4 identifies Miron Washington as a director of IMPINJ INC. He is not reported in this filing as an officer or ten percent owner, based on the roles indicated in the insider data.

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

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Available on EDGAR 09/16/2026 - 04:31 PM Accepted by SEC EDGAR 09/16/2026 - 04:31 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^*

WASHINGTON MIRON

(Last) (First) (Middle)

C/O IMPINJ, INC.

400 FAIRVIEW AVENUE NORTH, SUITE 1200

(Street)

SEATTLE WASHINGTON 98109

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
IMPINJ INC [ PI ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

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

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

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

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	09/15/2026		S		800	D	$173.26	4,354	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/ Yukio Morikubo, Attorney in fact for Miron Washington	09/16/2026
	** 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.
* Form 4: SEC 1474 (03-26)