IMPINJ CFO sells 1,429 shares under trading plan

IMPINJ INC chief financial officer Cary Baker reported selling 1,429 shares of common stock on August 10, 2026 at $185.00 per share.

Rhea-AI Filing Summary

IMPINJ INC chief financial officer Cary Baker reported selling 1,429 shares of common stock on August 10, 2026 at $185.00 per share. The transaction was reported as a sale and was effected pursuant to a Rule 10b5-1 trading plan effective on December 10, 2025. Following this transaction, Baker reported owning 88,226 shares of IMPINJ common stock directly.

Insider Trade Summary 10b5-1

Net Seller: 1,429 shares

Net Sell 1 txn

Insider Baker Cary

Role CHIEF FINANCIAL OFFICER

Sold 1,429 shs ($264K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	1,429	$185.00	$264K

Holdings After Transaction: Common Stock — 88,226 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: 1,429 shares Sale price per share: $185.00 per share Shares held after transaction: 88,226 shares +1 more

4 metrics

Shares sold 1,429 shares Common stock sold on August 10, 2026

Sale price per share $185.00 per share Reported transaction price for the August 10, 2026 sale

Shares held after transaction 88,226 shares Directly owned IMPINJ common stock after the sale

Rule 10b5-1 plan effective date December 10, 2025 Effective date of trading plan covering the reported sale

Key Terms

Rule 10b5-1 trading plan, Form 4, Common Stock

3 terms

Rule 10b5-1 trading plan regulatory

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

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.

Form 4 regulatory

"This insider transaction is disclosed in a Form 4 insider trading report"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Common Stock financial

"security_title: "Common Stock" for the reported transaction"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What insider transaction did IMPINJ (PI) CFO Cary Baker report?

Cary Baker reported a sale of 1,429 shares of IMPINJ common stock on August 10, 2026 at $185.00 per share, leaving him with 88,226 shares held directly after the transaction.

Was the IMPINJ (PI) insider sale made under a Rule 10b5-1 plan?

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

How many IMPINJ (PI) shares did the CFO sell and at what price?

Cary Baker sold 1,429 shares of IMPINJ common stock at a reported price of $185.00 per share. This single transaction is the only one disclosed in the referenced Form 4 filing.

How many IMPINJ (PI) shares does the CFO hold after this Form 4 sale?

After the reported sale, Cary Baker holds 88,226 shares of IMPINJ common stock directly. This post-transaction ownership figure reflects his position immediately following the August 10, 2026 sale.

What role does Cary Baker hold at IMPINJ (PI) in this insider filing?

Cary Baker is identified as the Chief Financial Officer of IMPINJ INC in the filing. The reported Form 4 transaction reflects his personal direct holdings of the company’s common stock.

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

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Accepted by SEC EDGAR 08/12/2026 - 04:50 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).

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)
08/10/2026

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	08/10/2026		S(1)		1,429	D	$185	88,226	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	08/12/2026
	** 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)