Impinj (PI) CFO reports RSU vesting, tax withholding and 7,627-unit grant

Rhea-AI Filing Summary

Impinj CFO Cary Baker reported routine equity compensation activity involving restricted stock units and common stock. On March 23, 2026, 1,858 RSUs vested and were converted into the same number of Impinj common shares. In connection with the vesting, 732 common shares were remitted to Impinj to satisfy tax withholding obligations under Rule 16b-3(e). Following these transactions, Baker directly held 89,003 shares of common stock.

Baker also received a new grant of 7,627 RSUs, each representing a right to one share of common stock. One-fourth of the shares subject to this new grant will vest on March 23, 2027, and 1/16 of the shares will vest each quarter thereafter, subject to continued service to Impinj.

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

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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)
03/23/2026

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	03/23/2026		M		782	A	$0	88,659	D
Common Stock	03/23/2026		M		479	A	$0	89,138	D
Common Stock	03/23/2026		M		597	A	$0	89,735	D
Common Stock	03/23/2026		F(1)		732	D	$101.17	89,003	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)	03/23/2026		M			782	(3)	(3)	Common Stock	782	$0	0	D
Restricted Stock Units	$0(2)	03/23/2026		M			479	(4)	(4)	Common Stock	479	$0	1,917	D
Restricted Stock Units	$0(2)	03/23/2026		M			597	(5)	(5)	Common Stock	597	$0	4,773	D
Restricted Stock Units	$0(2)	03/23/2026		A		7,627		(6)	(6)	Common Stock	7,627	$0	7,627	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 March 23, 2022, the reporting person was granted 12,500 RSUs. One-sixteenth of these vested on March 23, 2026.

4. On March 23, 2023, the reporting person was granted 7,665 RSUs. One-sixteenth of these vested on March 23, 2026.

5. On March 23, 2024, the reporting person was granted 9,545 RSUs. One-sixteenth of these vested on March 23, 2026.

6. One-fourth of the shares subject to the grant shall vest on March 23, 2027, and 1/16th of the shares subject to the grant shall vest each quarter thereafter, subject to the reporting person's continued service to the Issuer through such date.

	/s/ Yukio Morikubo, Attorney in fact for Cary Baker	03/24/2026
	** 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)

FAQ

What insider transactions did Impinj (PI) CFO Cary Baker report?

Cary Baker reported RSU vesting, related tax withholding, and a new RSU grant. On March 23, 2026, 1,858 RSUs vested into common shares and 732 shares were remitted to Impinj for tax obligations.

How many Impinj (PI) shares does the CFO hold after these transactions?

After the March 23, 2026 transactions, CFO Cary Baker directly holds 89,003 shares of Impinj common stock. This figure reflects the RSU vesting and the shares remitted to Impinj to cover tax withholding obligations.

What new RSU award did Impinj (PI) grant to its CFO?

Impinj granted Cary Baker 7,627 restricted stock units, each representing a right to one common share. This award adds to his equity-based compensation and vests over time, subject to his continued service with Impinj.

What is the vesting schedule for the CFO’s new Impinj (PI) RSU grant?

For the 7,627 new RSUs, one-fourth of the shares will vest on March 23, 2027. The remaining shares will vest in 1/16 increments each quarter thereafter, contingent on Baker’s continued service with the company.

Were any Impinj (PI) shares sold in the CFO’s Form 4 filing?

The filing shows no open-market sales. Instead, 732 common shares were remitted to Impinj in an exempt disposition under Rule 16b-3(e) to satisfy tax withholding obligations arising from RSU vesting.

How many RSUs vested for Impinj (PI) CFO Cary Baker on March 23, 2026?

On March 23, 2026, 1,858 restricted stock units vested for Cary Baker and were converted into common shares. This vesting stemmed from prior RSU grants made in 2022, 2023, and 2024, each with scheduled partial vesting on that date.