PI Insider Filing: Chris Diorio Disposes of 9,096 Impinj Shares via 10b5-1

Rhea-AI Filing Summary

Chris Diorio, Director and Chief Executive Officer of Impinj Inc. (PI), reported sales of common stock effected under a Rule 10b5-1 trading plan on September 15-16, 2025. The filing lists ten sell transactions that aggregate to 9,096 shares sold at weighted-average prices for each batch ranging from about $179.26 up to $191.76 as detailed in the form. Following these transactions, the filing shows Mr. Diorio directly beneficially owns 297,013 shares and indirectly owns 199,362 shares through DFT L.L.C.

The form includes explanatory notes that the reported amounts and prices reflect aggregated multiple transactions within specified per-share price ranges and that full per-transaction detail is available on request.

Positive

• Sales executed under a Rule 10b5-1 trading plan, indicating pre-authorized trades rather than opportunistic timing
• Detailed post-transaction ownership provided: 297,013 shares direct and 199,362 shares indirect

Negative

• Insider sold 9,096 shares over two days, which may be perceived negatively by some investors despite being pursuant to a 10b5-1 plan
• Form reports aggregated prices and counts rather than each individual trade price and quantity in the table (per-trade detail available only upon request)

Insights

Corporate Governance Expert

TL;DR: Insider sales under a pre-existing 10b5-1 plan; no governance red flags shown.

The Form 4 shows the CEO and a director executed multiple sales under a Rule 10b5-1 plan, which is a pre-authorized mechanism commonly used to avoid questions about trading on material nonpublic information. The filing discloses aggregated share counts and weighted-average prices with ranges for each grouped sale and provides direct and indirect post-transaction holdings. There is no indication in this filing of derivative activity, unusual acceleration, or amendments that would suggest atypical governance concerns. Impact is neutral absent other disclosures.

Securities Analyst

TL;DR: Reported transactions total 9,096 shares sold at prices roughly $179–$192; ownership remains material.

The document details ten sell entries on 9/15–9/16/2025 with weighted-average prices for each aggregated group. Post-sale beneficial ownership is reported as 297,013 shares direct and 199,362 indirect. The disclosure is specific about price ranges and offers to provide per-trade breakdowns on request, which supports transparency for market participants. On the face of this filing the market impact is likely limited and informational.

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).

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)
09/15/2025

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	09/15/2025		S(1)		568	D	$179.2576(2)	305,541	D
Common Stock	09/15/2025		S(1)		467	D	$180.6502(3)	305,074	D
Common Stock	09/15/2025		S(1)		1,909	D	$181.8397(4)	303,165	D
Common Stock	09/15/2025		S(1)		1,260	D	$182.7683(5)	301,905	D
Common Stock	09/15/2025		S(1)		796	D	$183.4741(6)	301,109	D
Common Stock	09/16/2025		S(1)		1,821	D	$186.4275(7)	299,288	D
Common Stock	09/16/2025		S(1)		1,073	D	$187.5226(8)	298,215	D
Common Stock	09/16/2025		S(1)		850	D	$189.2122(9)	297,365	D
Common Stock	09/16/2025		S(1)		340	D	$190.2559(10)	297,025	D
Common Stock	09/16/2025		S(1)		12	D	$191.7567(11)	297,013	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

Explanation of Responses:

1. The sales reported by Dr. Diorio were effected pursuant to a Rule 10b5-1 trading plan effective on May 28, 2025.

2. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $179.00 to $179.665, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

3. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $180.235 to $180.85, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

4. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $181.24 to $182.21, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

5. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $182.30 to $183.245, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

6. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $183.30 to $183.88, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

7. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $186.045 to $186.8101, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

8. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $187.335 to $188.00, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

9. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $188.82 to $189.615, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

10. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $190.0001 to $190.545, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

11. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $191.61 to $191.77, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

	/s/ Yukio Morikubo, Attorney in fact for Chris Diorio	09/16/2025
	** 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 did Impinj (PI) CEO Chris Diorio report on Form 4?

The filing reports that Chris Diorio sold 9,096 shares of Impinj common stock on September 15-16, 2025 under a Rule 10b5-1 trading plan and now directly owns 297,013 shares.

Were the sales by Chris Diorio part of a pre-arranged plan?

Yes. The Form 4 explicitly states the sales were effected pursuant to a Rule 10b5-1 trading plan effective May 28, 2025.

What price ranges are disclosed for the sales?

The filing discloses aggregated weighted-average prices per grouped sale and specifies per-trade price ranges for each group, with prices in the ranges approximately from $179.00 up to $191.77 per share.

How much does Chris Diorio beneficially own after these transactions?

After the reported transactions, the Form 4 shows 297,013 shares owned directly and 199,362 shares owned indirectly through DFT L.L.C.

Does the Form 4 show any derivative transactions by the reporting person?

No. Table II for derivative securities contains no entries; only non-derivative common stock sales are reported.