Form 4: PI CEO Diorio Adds 54,075 Shares; Options Disclosed

Rhea-AI Filing Summary

Chris Diorio, Ph.D., Chief Executive Officer and Director of Impinj Inc. (PI), reported insider transactions dated 09/18/2025. The filing shows non-derivative purchases of 47,039 and 7,036 shares of Common Stock on 09/18/2025 at reported prices of $33.77 and $22.40, respectively. Following those transactions the report lists 351,088 shares beneficially owned directly and 199,362 shares beneficially owned indirectly through DFT L.L.C. The filing also reports derivative entries showing stock options tied to the same amounts and exercise prices, with vesting dates noted as July 3, 2021 and June 11, 2022. The document was signed 09/19/2025.

Positive

• CEO increased direct ownership through reported acquisitions of 47,039 and 7,036 shares on 09/18/2025.
• Vested options disclosed with clear vesting dates (July 3, 2021 and June 11, 2022), clarifying exercisable holdings.

Negative

• None.

Insights

Financial Analyst

TL;DR: Insider increased direct holdings via reported acquisitions and holds vested options, a routine executive ownership update.

The Form 4 documents purchases and corresponding derivative entries for the CEO showing acquisition of 54,075 shares on 09/18/2025 and existing options with exercise prices of $33.77 and $22.40. The filing discloses both direct and indirect ownership totals which help quantify management's stake: 351,088 shares direct and 199,362 indirect via DFT L.L.C. This is a disclosure of insider activity rather than operating performance; it provides transparency on executive exposure to equity but does not include financial results or forward guidance.

Corporate Governance Expert

TL;DR: Filing shows standard Section 16 disclosure: CEO/Director reported acquisitions and vested option holdings, signed by attorney-in-fact.

The reported transactions include non-derivative acquisitions and derivative option entries with vesting dates specified. The report is executed by an attorney-in-fact, indicating delegated filing authority. The combination of direct and indirect holdings is clearly stated, aiding assessments of insider alignment with shareholders. There are no disclosures here of departures, related-party issues, or material governance changes—this is a routine ownership update under Section 16.

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
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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 WA 98109

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2025

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	09/18/2025		M		47,039	A	$33.77	344,052	D
Common Stock	09/18/2025		M		7,036	A	$22.4	351,088	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
Stock Option (right to buy)	$33.77	09/18/2025		M			47,039	(1)	08/11/2027	Common Stock	47,039	$0	0	D
Stock Option (right to buy)	$22.4	09/18/2025		M			7,036	(2)	06/15/2028	Common Stock	7,036	$0	23,500	D

Explanation of Responses:

1. The option became fully vested on July 3, 2021.

2. The option became fully vested on June 11, 2022.

	/s/ Yukio Morikubo, Attorney in fact for Chris Diorio	09/19/2025
	** 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.
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FAQ

What transactions did Chris Diorio report on Form 4 for Impinj (PI)?

The filing reports acquisitions on 09/18/2025 of 47,039 shares at $33.77 and 7,036 shares at $22.40, plus related option entries.

How many shares does the filing show Chris Diorio beneficially owns?

The report shows 351,088 shares beneficially owned directly and 199,362 shares beneficially owned indirectly through DFT L.L.C.

Are there derivative securities disclosed in the Form 4?

Yes. The filing lists stock options corresponding to 47,039 shares at an exercise price of $33.77 and 7,036 shares at $22.40, with exercisable/expiration details included.

What relationship to the issuer does the reporting person have?

Chris Diorio is reported as both a Director and the Chief Executive Officer of Impinj Inc.

When was the Form 4 signed and by whom?

The signature block shows the form was signed on 09/19/2025 by Yukio Morikubo, Attorney in fact for Chris Diorio.