Impinj CEO has 3,753 RSUs vest, 1,477 shares withheld

IMPINJ INC (PI) reported that Chief Executive Officer and director Chris Diorio, Ph.D., had 3,753 Restricted Stock Units convert into the same number of shares of common stock on August 20, 2026.

Rhea-AI Filing Summary

IMPINJ INC (PI) reported that Chief Executive Officer and director Chris Diorio, Ph.D., had 3,753 Restricted Stock Units convert into the same number of shares of common stock on August 20, 2026. In connection with this vesting, 1,477 shares were remitted to Impinj to satisfy tax withholding obligations at a reference price of $159.73 per share, treated as an exempt disposition to the issuer under Rule 16b-3(e). Following the RSU conversion, Diorio held 11,262 RSUs directly, and separately reported 199,362 shares of common stock held indirectly through DFT L.L.C.

Insider Trade Summary

3,753 shares exercised/converted

Exercise 4 txns

Insider DIORIO CHRIS PH.D.

Role CHIEF EXECUTIVE OFFICER

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F2, F3	3,753	$0.00	$0.00
Exercise	Common Stock	3,753	$0.00	$0.00
Tax Withholding	Common Stock F1	1,477	$159.73	$236K
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 11,262 contracts (Direct); Common Stock — 364,421 shares (Direct); Common Stock — 199,362 shares (Indirect, by DFT L.L.C.)

Footnotes (3)

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 August 20, 2025, the reporting person was granted 15,015 RSUs. One-fourth of these vested on August 20, 2026.

Key Figures

RSUs converted: 3,753 RSUs Shares remitted for taxes: 1,477 shares Tax reference price: $159.73 per share +2 more

5 metrics

RSUs converted 3,753 RSUs Restricted Stock Units converted into common stock on August 20, 2026

Shares remitted for taxes 1,477 shares Common shares remitted to issuer to satisfy tax withholding obligations

Tax reference price $159.73 per share Price used for shares remitted for tax withholding

RSUs held after transaction 11,262 RSUs Direct RSU holdings by CEO following the conversion

Indirect common shares held 199,362 shares Common stock held indirectly by DFT L.L.C.

Key Terms

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

4 terms

Restricted Stock Units financial

"The security title is listed as "Restricted Stock Units" for the derivative"

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

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

tax withholding obligations financial

"in connection with the satisfaction of tax withholding obligations arising out"

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.

What insider equity transactions did PI report for CEO Chris Diorio on August 20, 2026?

Chris Diorio had 3,753 RSUs convert into 3,753 common shares, and 1,477 shares were remitted to Impinj to cover tax withholding obligations related to this vesting.

How many shares were withheld for taxes in the latest PI Form 4 filing?

The filing reports that 1,477 shares of Impinj common stock were remitted to the issuer to satisfy tax withholding obligations arising from RSU vesting, using a reference price of $159.73 per share.

How many Restricted Stock Units does the PI CEO hold after this transaction?

After the August 20, 2026 RSU conversion, Chris Diorio is reported as holding 11,262 Restricted Stock Units directly, each representing a contingent right to receive one share of Impinj common stock.

What indirect holdings of PI common stock are reported for the CEO?

The Form 4 lists an indirect holding of 199,362 shares of Impinj common stock held by DFT L.L.C., attributed as an indirect ownership position for Chris Diorio.

Was the Impinj CEO’s tax-related share remittance treated as an exempt transaction?

Yes. The filing states the remittance of 1,477 shares to satisfy tax withholding obligations was an exempt disposition to the issuer under Rule 16b-3(e).

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

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Available on EDGAR 08/21/2026 - 07:09 PM EDT Accepted by SEC EDGAR 08/21/2026 - 07:08 PM EDT 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)
08/20/2026

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	08/20/2026		M		3,753	A	$0	365,898	D
Common Stock	08/20/2026		F(1)		1,477	D	$159.73	364,421	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)	08/20/2026		M			3,753	(3)	(3)	Common Stock	3,753	$0	11,262	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 August 20, 2025, the reporting person was granted 15,015 RSUs. One-fourth of these vested on August 20, 2026.

	/s/ Yukio Morikubo, Attorney in fact for Chris Diorio	08/21/2026
	** 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)