DIORIO CHRIS PH.D.

SEC source: 0001677721-26-000020 · form4-10132026_081013.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 346,265

F1 · kind: The disposition of shares reported by Dr. Diorio was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026.

SEC source: 0001677721-26-000018 · form4-09242026_100921.xml · derivative · entry 6

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,904

Underlying: Common Stock · 1,817 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2026.

F4 · derivative.expiration_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2026.

SEC source: 0001677721-26-000018 · form4-09242026_100921.xml · derivative · entry 5

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,448

Underlying: Common Stock · 1,224 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F3 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2026.

F3 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2026.

SEC source: 0001677721-26-000018 · form4-09242026_100921.xml · nonDerivative · entry 3

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 356,265

F1 · kind: 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.

SEC source: 0001677721-26-000018 · form4-09242026_100921.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 357,462

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000018 · form4-09242026_100921.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 355,645

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000016 · form4-09152026_080948.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 354,421

F1 · kind: The disposition of shares reported by Dr. Diorio was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026.

SEC source: 0001677721-26-000014 · form4-08212026_110843.xml · derivative · entry 4

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,262

Underlying: Common Stock · 3,753 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F3 · derivative.exercise_date: On August 20, 2025, the reporting person was granted 15,015 RSUs. One-fourth of these vested on August 20, 2026.

F3 · derivative.expiration_date: On August 20, 2025, the reporting person was granted 15,015 RSUs. One-fourth of these vested on August 20, 2026.

SEC source: 0001677721-26-000014 · form4-08212026_110843.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 364,421

F1 · kind: 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.

SEC source: 0001677721-26-000014 · form4-08212026_110843.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 365,898

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000012 · form4-08182026_080835.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 362,145

F1 · kind: The disposition of shares reported by Dr. Diorio was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026.

SEC source: 0001677721-26-000011 · form4-07142026_080705.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 372,145

F1 · kind: The disposition of shares reported by Dr. Diorio was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026.

SEC source: 0001677721-26-000009 · form4-06242026_090620.xml · derivative · entry 6

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,721

Underlying: Common Stock · 1,817 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on June 23, 2026.

F4 · derivative.expiration_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on June 23, 2026.

SEC source: 0001677721-26-000009 · form4-06242026_090620.xml · derivative · entry 5

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,672

Underlying: Common Stock · 1,223 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F3 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on June 23, 2026.

F3 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on June 23, 2026.

SEC source: 0001677721-26-000009 · form4-06242026_090620.xml · nonDerivative · entry 3

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 382,145

F1 · kind: 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.

SEC source: 0001677721-26-000009 · form4-06242026_090620.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,342

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000009 · form4-06242026_090620.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 381,525

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000007 · form4-06162026_090649.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 380,302

F1 · kind: The disposition of shares reported by Dr. Diorio was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026.

SEC source: 0001677721-26-000006 · form4-06092026_050601.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 390,302

F1 · kind: For estate planning purposes, on May 26, 2026 (the "Transfer Date"), Dr. Chris Diorio ("Dr. Diorio") received 180,000 shares of the issuer's common stock from the 2012 Diorio Descendants Irrevocable Trust (the "Diorio Trust") in exchange for the simultaneous transfer by Dr. Diorio of 180,000 shares of the issuer's common stock to the Diorio Trust. The estimated per-share value was $156.675, the average of the high and low sales prices of a share of the issuer's common stock on the Transfer Date.

F2 · kind: The exchange of shares reported by Dr. Diorio was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026.

F1 · price: For estate planning purposes, on May 26, 2026 (the "Transfer Date"), Dr. Chris Diorio ("Dr. Diorio") received 180,000 shares of the issuer's common stock from the 2012 Diorio Descendants Irrevocable Trust (the "Diorio Trust") in exchange for the simultaneous transfer by Dr. Diorio of 180,000 shares of the issuer's common stock to the Diorio Trust. The estimated per-share value was $156.675, the average of the high and low sales prices of a share of the issuer's common stock on the Transfer Date.

SEC source: 0001677721-26-000006 · form4-06092026_050601.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 570,302

F1 · kind: For estate planning purposes, on May 26, 2026 (the "Transfer Date"), Dr. Chris Diorio ("Dr. Diorio") received 180,000 shares of the issuer's common stock from the 2012 Diorio Descendants Irrevocable Trust (the "Diorio Trust") in exchange for the simultaneous transfer by Dr. Diorio of 180,000 shares of the issuer's common stock to the Diorio Trust. The estimated per-share value was $156.675, the average of the high and low sales prices of a share of the issuer's common stock on the Transfer Date.

F2 · kind: The exchange of shares reported by Dr. Diorio was effected pursuant to a Rule 10b5-1 trading plan adopted on February 23, 2026.

F1 · price: For estate planning purposes, on May 26, 2026 (the "Transfer Date"), Dr. Chris Diorio ("Dr. Diorio") received 180,000 shares of the issuer's common stock from the 2012 Diorio Descendants Irrevocable Trust (the "Diorio Trust") in exchange for the simultaneous transfer by Dr. Diorio of 180,000 shares of the issuer's common stock to the Diorio Trust. The estimated per-share value was $156.675, the average of the high and low sales prices of a share of the issuer's common stock on the Transfer Date.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · derivative · entry 9

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,806

Underlying: Common Stock · 24,806 shares

Expires not disclosed

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F6 · derivative.exercise_date: 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.

F6 · derivative.expiration_date: 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.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · derivative · entry 8

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,538

Underlying: Common Stock · 1,817 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on March 23, 2026.

F5 · derivative.expiration_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on March 23, 2026.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · derivative · entry 7

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,895

Underlying: Common Stock · 1,224 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on March 23, 2026.

F4 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on March 23, 2026.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · derivative · entry 6

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,594 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F3 · derivative.exercise_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on March 23, 2026.

F3 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on March 23, 2026.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · nonDerivative · entry 4

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 390,302

F1 · kind: 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.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · nonDerivative · entry 3

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 392,520

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 390,703

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000005 · form4-03242026_080342.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 389,479

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-26-000004 · form4-02232026_090258.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 386,885

F2 · kind: 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 the PSUs.

SEC source: 0001677721-26-000004 · form4-02232026_090258.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 394,320

F1 · shares: On March 23, 2023, the Reporting Person was granted performance restricted stock units (PSUs). The PSUs vested upon the Reporting Person's satisfaction of certain performance criteria. On February 18, 2026, the Issuer's Board of Directors determined the level at which the corporate performance goals were attained, resulting in the vesting of 21,734 shares of Common Stock underlying the PSUs.

SEC source: 0001677721-26-000002 · form4-02192026_090257.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 372,586

SEC source: 0001677721-25-000009 · form4-12232025_111256.xml · derivative · entry 8

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,355

Underlying: Common Stock · 1,817 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on December 23, 2025.

F5 · derivative.expiration_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on December 23, 2025.

SEC source: 0001677721-25-000009 · form4-12232025_111256.xml · derivative · entry 7

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,119

Underlying: Common Stock · 1,224 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on December 23, 2025.

F4 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on December 23, 2025.

SEC source: 0001677721-25-000009 · form4-12232025_111256.xml · derivative · entry 6

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,594

Underlying: Common Stock · 2,594 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F3 · derivative.exercise_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on December 23, 2025.

F3 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on December 23, 2025.

SEC source: 0001677721-25-000009 · form4-12232025_111256.xml · nonDerivative · entry 4

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 374,422

F1 · kind: 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.

SEC source: 0001677721-25-000009 · form4-12232025_111256.xml · nonDerivative · entry 3

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 376,640

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-25-000009 · form4-12232025_111256.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 374,823

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-25-000009 · form4-12232025_111256.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 373,599

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-25-000008 · form4-11202025_101122.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 371,005

F1 · kind: Represents shares of common stock that the Reporting Person donated as a gift to a donor advised fund.

SEC source: 0001677721-25-000007 · form4-10302025_101038.xml · derivative · entry 3

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 23,500 shares

Expires 2028-06-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The option became fully vested on June 11, 2022.

SEC source: 0001677721-25-000007 · form4-10302025_101038.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 378,005

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-25-000006 · form4-09242025_040907.xml · derivative · entry 8

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,172

Underlying: Common Stock · 1,818 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2025.

F5 · derivative.expiration_date: On March 23, 2024, the reporting person was granted 29,075 RSUs. One-sixteenth of these vested on September 23, 2025.

SEC source: 0001677721-25-000006 · form4-09242025_040907.xml · derivative · entry 7

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,343

Underlying: Common Stock · 1,224 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2025.

F4 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these vested on September 23, 2025.

SEC source: 0001677721-25-000006 · form4-09242025_040907.xml · derivative · entry 6

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,188

Underlying: Common Stock · 2,594 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F3 · derivative.exercise_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on September 23, 2025.

F3 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these vested on September 23, 2025.

SEC source: 0001677721-25-000006 · form4-09242025_040907.xml · nonDerivative · entry 4

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 354,505

F1 · kind: 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.

SEC source: 0001677721-25-000006 · form4-09242025_040907.xml · nonDerivative · entry 3

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 356,724

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-25-000006 · form4-09242025_040907.xml · nonDerivative · entry 2

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 354,906

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-25-000006 · form4-09242025_040907.xml · nonDerivative · entry 1

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 353,682

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001677721-25-000005 · form4-09192025_090952.xml · derivative · entry 5

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,500

Underlying: Common Stock · 7,036 shares

Expires 2028-06-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: The option became fully vested on June 11, 2022.

SEC source: 0001677721-25-000005 · form4-09192025_090952.xml · derivative · entry 4

DIORIO CHRIS PH.D. · CIK 0001677721 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 47,039 shares

Expires 2027-08-11

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The option became fully vested on July 3, 2021.