Impinj CFO remits 424 shares for tax withholding

Vested RSUs resulted in common shares, while 424 shares were remitted to the issuer for tax withholding.

Rhea-AI Filing Summary

Impinj Inc. CFO Baker Cary reported that 479 RSUs from a March 23, 2023 grant and 596 RSUs from a March 23, 2024 grant vested on September 23, 2026; one-sixteenth of each grant vested. Cary acquired the corresponding common shares and remitted 424 shares to the issuer for tax withholding, reported at $177.20 per share. No Rule 10b5-1 plan is reported.

Insider Trade Summary

1,075 shares exercised/converted

Exercise 5 txns

Insider Baker Cary

Role CHIEF FINANCIAL OFFICER

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F2, F3	479	$0.00	$0.00
Exercise	Restricted Stock Units F2, F4	596	$0.00	$0.00
Exercise	Common Stock	479	$0.00	$0.00
Exercise	Common Stock	596	$0.00	$0.00
Tax Withholding	Common Stock F1	424	$177.20	$75K

Holdings After Transaction: Restricted Stock Units — 4,539 contracts (Direct); Common Stock — 81,039 shares (Direct)

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 7,665 RSUs. One-sixteenth of these vested on September 23, 2026.
4. F4. On March 23, 2024, the reporting person was granted 9,545 RSUs. One-sixteenth of these vested on September 23, 2026.

Key Figures

RSUs vested from March 23, 2023 grant: 479 RSUs RSUs vested from March 23, 2024 grant: 596 RSUs Common shares acquired: 479 shares +3 more

6 metrics

RSUs vested from March 23, 2023 grant 479 RSUs One-sixteenth vested September 23, 2026

RSUs vested from March 23, 2024 grant 596 RSUs One-sixteenth vested September 23, 2026

Common shares acquired 479 shares September 23, 2026, upon vesting of RSUs

Common shares acquired 596 shares September 23, 2026, upon vesting of RSUs

Shares remitted for tax withholding 424 shares Remitted to the issuer September 23, 2026

Per-share value reported for tax withholding $177.20 per share September 23, 2026

Key Terms

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

4 terms

Restricted Stock Units financial

"One-sixteenth of these vested on September 23, 2026"

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.

contingent right financial

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

tax withholding obligations financial

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

Rule 16b-3(e) regulatory

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

FAQ

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

What did Impinj (PI) CFO Baker Cary report on September 23, 2026?

On September 23, 2026, 479 RSUs from a March 23, 2023 grant and 596 RSUs from a March 23, 2024 grant vested. Cary acquired the corresponding common shares and remitted 424 shares to the issuer for tax withholding, reported at $177.20 per share.

Was the PI CFO's transaction reported under a Rule 10b5-1 plan?

No Rule 10b5-1 plan is reported.

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

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

Baker Cary

(Last) (First) (Middle)

400 FAIRVIEW AVE N. 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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CHIEF FINANCIAL 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		479	A	$0	80,867	D
Common Stock	09/23/2026		M		596	A	$0	81,463	D
Common Stock	09/23/2026		F(1)		424	D	$177.2	81,039	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
Restricted Stock Units	$0(2)	09/23/2026		M			479	(3)	(3)	Common Stock	479	$0	959	D
Restricted Stock Units	$0(2)	09/23/2026		M			596	(4)	(4)	Common Stock	596	$0	3,580	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 7,665 RSUs. One-sixteenth of these vested on September 23, 2026.

4. On March 23, 2024, the reporting person was granted 9,545 RSUs. One-sixteenth of these vested on September 23, 2026.

	/s/ Yukio Morikubo, Attorney in fact for Cary Baker	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)