Impinj CFO sells 8,892 shares at $185 each

IMPINJ’s chief financial officer reported a pre-planned sale of 8,892 shares and now directly holds 80,388 shares.

Rhea-AI Filing Summary

IMPINJ INC (PI) reported that its chief financial officer, Cary Baker, sold 8,892 shares of common stock on September 21, 2026 at a price of $185.00 per share in an open-market transaction. After this sale, he held 80,388 shares of the company’s common stock directly.

The sale was carried out pursuant to a Rule 10b5-1 trading plan that became effective on December 10, 2025, indicating it was pre-arranged under that plan rather than opportunistic.

Insider Trade Summary 10b5-1

Net Seller: 8,892 shares

Net Sell 1 txn

Insider Baker Cary

Role CHIEF FINANCIAL OFFICER

Sold 8,892 shs ($1.65M)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	8,892	$185.00	$1.65M

Holdings After Transaction: Common Stock — 80,388 shares (Direct)

Footnotes (1)

1. F1. The sales reported by Mr. Baker were effected pursuant to a Rule 10b5-1 trading plan effective on December 10, 2025.

Key Figures

Shares sold: 8,892 shares Sale price per share: $185.00 per share Shares held after transaction: 80,388 shares +1 more

4 metrics

Shares sold 8,892 shares Common stock sold by the CFO on September 21, 2026

Sale price per share $185.00 per share Price for the CFO’s sale on September 21, 2026

Shares held after transaction 80,388 shares Direct holdings of the CFO after the reported sale

Rule 10b5-1 plan effective date December 10, 2025 Effective date of the trading plan under which the sale occurred

Key Terms

Rule 10b5-1 trading plan, open-market transaction

2 terms

Rule 10b5-1 trading plan regulatory

"The sales reported by Mr. Baker were effected pursuant to a Rule 10b5-1 trading plan effective on December 10, 2025."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market transaction financial

"Sale in open market or private transaction"

An open-market transaction is a buy or sell of a company's shares or other securities conducted on a public exchange at the current market price, rather than through a private agreement. Investors watch these trades because they change the number of shares available and can move the price immediately—similar to how a large purchase at a busy store can raise demand and affect the checkout price—so such activity can signal market sentiment and alter ownership stakes.

FAQ

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

What insider transaction did IMPINJ (PI) report for its CFO?

IMPINJ reported that chief financial officer Cary Baker sold 8,892 shares of common stock on September 21, 2026 at $185.00 per share in an open-market transaction, and directly held 80,388 shares afterward.

Was the IMPINJ (PI) CFO’s September 21, 2026 share sale under a Rule 10b5-1 plan?

Yes. The filing states that the sales reported by Cary Baker were effected pursuant to a Rule 10b5-1 trading plan that became effective on December 10, 2025.

How many IMPINJ (PI) shares does the CFO hold after the reported sale?

After the reported sale, chief financial officer Cary Baker directly holds 80,388 shares of IMPINJ common stock, according to the Form 4 disclosure.

What was the total number of IMPINJ (PI) shares sold by the CFO in this Form 4?

The Form 4 reports that chief financial officer Cary Baker sold 8,892 shares of IMPINJ common stock in this transaction, at a price of $185.00 per share.

What price did the IMPINJ (PI) CFO receive per share in the reported sale?

The reported sale by chief financial officer Cary Baker on September 21, 2026 was executed at a price of $185.00 per share of IMPINJ common stock.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/21/2026 - 05:51 PM Accepted by SEC EDGAR 09/21/2026 - 05:50 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).

X

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)
09/21/2026

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	09/21/2026		S(1)		8,892	D	$185	80,388	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

Explanation of Responses:

1. The sales reported by Mr. Baker were effected pursuant to a Rule 10b5-1 trading plan effective on December 10, 2025.

	/s/ Yukio Morikubo, Attorney in fact for Cary Baker	09/21/2026
	** 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)