Impinj CFO has 1,739 RSUs vest, 685 shares withheld

IMPINJ INC (PI) reported that its Chief Financial Officer, Cary Baker, had 1,739 Restricted Stock Units convert into an equal number of shares of common stock on August 20, 2026, as part of a prior RSU grant.

Rhea-AI Filing Summary

IMPINJ INC (PI) reported that its Chief Financial Officer, Cary Baker, had 1,739 Restricted Stock Units convert into an equal number of shares of common stock on August 20, 2026, as part of a prior RSU grant. In connection with this vesting, 685 shares of common stock were remitted to Impinj in an exempt disposition under Rule 16b-3(e) to satisfy tax withholding obligations at a price of $159.73 per share. Following the transaction, Baker held 5,219 RSUs representing additional contingent rights to receive Impinj common stock from the same grant, which originally totaled 6,958 RSUs.

Insider Trade Summary

1,739 shares exercised/converted

Exercise 3 txns

Insider Baker Cary

Role CHIEF FINANCIAL OFFICER

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units F2, F3	1,739	$0.00	$0.00
Exercise	Common Stock	1,739	$0.00	$0.00
Tax Withholding	Common Stock F1	685	$159.73	$109K

Holdings After Transaction: Restricted Stock Units — 5,219 contracts (Direct); Common Stock — 89,280 shares (Direct)

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 6,958 RSUs. One-fourth of these vested on August 20, 2026.

Key Figures

RSUs converted: 1,739 Restricted Stock Units Shares remitted for taxes: 685 shares Tax withholding price per share: $159.73 per share +2 more

5 metrics

RSUs converted 1,739 Restricted Stock Units RSUs converting into common stock on August 20, 2026

Shares remitted for taxes 685 shares Common shares delivered to Impinj to satisfy tax withholding obligations

Tax withholding price per share $159.73 per share Price applied to the 685 shares remitted for tax withholding

Original RSU grant 6,958 RSUs RSUs granted to the reporting person on August 20, 2025

RSUs held after transaction 5,219 RSUs Restricted Stock Units remaining following the August 20, 2026 vesting event

Key Terms

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

3 terms

Restricted Stock Units financial

"The reporting person was granted 6,958 RSUs"

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"

FAQ

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

What insider equity transaction did PI’s CFO report on this Form 4?

Cary Baker, CFO of IMPINJ INC (PI), reported the vesting and conversion of 1,739 RSUs into common stock on August 20, 2026, plus an exempt disposition of 685 shares back to Impinj to satisfy tax withholding obligations.

How many IMPINJ (PI) shares were withheld for taxes in the CFO’s Form 4?

The filing states that 685 shares of Impinj common stock were remitted to the issuer in an exempt disposition under Rule 16b-3(e) to satisfy tax withholding obligations, at a price of $159.73 per share.

What RSU grant underlies the Form 4 transactions for PI’s CFO?

The Form 4 notes that on August 20, 2025, the reporting person was granted 6,958 RSUs, and that one-fourth of these units vested on August 20, 2026, leading to the conversion of 1,739 RSUs into common stock.

How many RSUs does the PI CFO still hold after this vesting event?

After the August 20, 2026 vesting and conversion of 1,739 RSUs, the filing reports that Cary Baker holds 5,219 RSUs, which represent contingent rights to receive an equal number of shares of Impinj common stock.

Was the PI CFO’s tax-related share disposition part of open-market selling?

No. The Form 4 describes the 685-share disposition as an exempt transaction under Rule 16b-3(e), in which shares were remitted to Impinj to satisfy tax withholding obligations arising from RSU vesting.

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

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Available on EDGAR 08/21/2026 - 07:11 PM EDT Accepted by SEC EDGAR 08/21/2026 - 07:10 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^*

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)
08/20/2026

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		1,739	A	$0	89,965	D
Common Stock	08/20/2026		F(1)		685	D	$159.73	89,280	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
Restricted Stock Units	$0(2)	08/20/2026		M			1,739	(3)	(3)	Common Stock	1,739	$0	5,219	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 6,958 RSUs. One-fourth of these vested on August 20, 2026.

	/s/ Yukio Morikubo, Attorney in fact for Cary Baker	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)