Impinj CEO receives 3,041 shares as stock awards vest

The vesting reflects one-sixteenth of grants made on March 23, 2023, and March 23, 2024.

Rhea-AI Filing Summary

Impinj Inc. CEO and director Chris Diorio had 3,041 restricted stock units vest on September 23, 2026, and acquired 3,041 shares of common stock. He remitted 1,197 shares to Impinj to satisfy tax-withholding obligations, at a reported $177.20 per share. A separate holding entry lists 199,362 shares held indirectly by DFT L.L.C.

Insider Trade Summary

3,041 shares exercised/converted

Exercise 6 txns

Insider DIORIO CHRIS PH.D.

Role CHIEF EXECUTIVE OFFICER

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F2, F3	1,224	$0.00	$0.00
Exercise	Restricted Stock Units F2, F4	1,817	$0.00	$0.00
Exercise	Common Stock	1,224	$0.00	$0.00
Exercise	Common Stock	1,817	$0.00	$0.00
Tax Withholding	Common Stock F1	1,197	$177.20	$212K
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 13,352 contracts (Direct); Common Stock — 356,265 shares (Direct); Common Stock — 199,362 shares (Indirect, by DFT L.L.C.)

Footnotes (4)

1. F1. In an exempt disposition to the Issuer under Rule 16b-3(e), the Reporting Person remitted shares to the Issuer in connection with the satisfaction of tax withholding obligations arising out of the vesting of restricted stock units, or RSUs.
2. F2. Each RSU represents a contingent right to receive one share of Impinj common stock.
3. F3. On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2026.
4. F4. On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2026.

Key Figures

RSUs vested: 3,041 RSUs RSUs vested from March 2023 grant: 1,224 RSUs RSUs vested from March 2024 grant: 1,817 RSUs +3 more

6 metrics

RSUs vested 3,041 RSUs September 23, 2026

RSUs vested from March 2023 grant 1,224 RSUs One-sixteenth of 19,580 RSUs granted March 23, 2023 vested September 23, 2026.

RSUs vested from March 2024 grant 1,817 RSUs One-sixteenth of 29,075 RSUs granted March 23, 2024 vested September 23, 2026.

Shares remitted for tax withholding 1,197 shares Remitted to Impinj on September 23, 2026.

Reported per-share amount $177.20 per share For shares remitted to satisfy tax-withholding obligations.

Shares held indirectly by DFT L.L.C. 199,362 shares Holding entry dated September 23, 2026.

Key Terms

Restricted Stock Units, Rule 16b-3(e), tax withholding obligations, contingent right

4 terms

Restricted Stock Units financial

"vesting of restricted stock units, or RSUs"

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.

Rule 16b-3(e) regulatory

"exempt disposition to the Issuer under Rule 16b-3(e)"

tax withholding obligations financial

"satisfaction of tax withholding obligations arising out of the vesting"

contingent right financial

"Each RSU represents a contingent right to receive one share"

FAQ

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

How many PI shares did Chris Diorio receive from RSU vesting?

Chris Diorio acquired 3,041 shares of Impinj common stock when 1,224 RSUs and 1,817 RSUs vested on September 23, 2026.

How many PI shares did Chris Diorio remit for tax withholding?

He remitted 1,197 shares to Impinj to satisfy tax-withholding obligations, at a reported $177.20 per share.

Which RSU grants vested for Impinj CEO Chris Diorio?

One-sixteenth of 19,580 RSUs granted March 23, 2023 and one-sixteenth of 29,075 RSUs granted March 23, 2024 vested on September 23, 2026.

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

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Available on EDGAR 09/24/2026 - 06:08 PM Accepted by SEC EDGAR 09/24/2026 - 06:07 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^*

DIORIO CHRIS PH.D.

(Last) (First) (Middle)

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
X	Officer (give title below)		Other (specify below)
	CHIEF EXECUTIVE OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/23/2026

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	09/23/2026		M		1,224	A	$0	355,645	D
Common Stock	09/23/2026		M		1,817	A	$0	357,462	D
Common Stock	09/23/2026		F(1)		1,197	D	$177.2	356,265	D
Common Stock								199,362	I	by DFT L.L.C.

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
Restricted Stock Units	$0(2)	09/23/2026		M			1,224	(3)	(3)	Common Stock	1,224	$0	2,448	D
Restricted Stock Units	$0(2)	09/23/2026		M			1,817	(4)	(4)	Common Stock	1,817	$0	10,904	D

Explanation of Responses:

1. In an exempt disposition to the Issuer under Rule 16b-3(e), the Reporting Person remitted shares to the Issuer in connection with the satisfaction of tax withholding obligations arising out of the vesting of restricted stock units, or RSUs.

2. Each RSU represents a contingent right to receive one share of Impinj common stock.

3. On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2026.

4. On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2026.

	/s/ Yukio Morikubo, Attorney in fact for Chris Diorio	09/24/2026
	** 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)