PI

SEC source: 0001415889-25-001433 · form4-01142025_090159.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: 334,326

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $139.98 to $140.97, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-25-001429 · form4-01142025_090148.xml · nonDerivative · entry 3

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,586

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

F3 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $141.12 to $141.47, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-25-001429 · form4-01142025_090148.xml · nonDerivative · entry 2

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,756

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $139.98 to $140.965, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-25-001438 · form4-01142025_090150.xml · derivative · entry 4

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,250

Underlying: Common Stock · 1,250 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.

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On April 12, 2021, the reporting person was granted 20,000 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

F5 · derivative.expiration_date: On April 12, 2021, the reporting person was granted 20,000 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

SEC source: 0001415889-25-001438 · form4-01142025_090150.xml · nonDerivative · entry 1

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,430

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: 0001415889-25-001436 · form4-01142025_090140.xml · derivative · entry 4

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 938

Underlying: Common Stock · 937 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.

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On April 12, 2021, the reporting person was granted 15,000 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

F5 · derivative.expiration_date: On April 12, 2021, the reporting person was granted 15,000 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

SEC source: 0001415889-25-001436 · form4-01142025_090140.xml · nonDerivative · entry 1

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,044

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: 0001415889-25-001433 · form4-01142025_090159.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: 3,125

Underlying: Common Stock · 3,125 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.

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On April 12, 2021, the reporting person was granted 50,000 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

F5 · derivative.expiration_date: On April 12, 2021, the reporting person was granted 50,000 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

SEC source: 0001415889-25-001433 · form4-01142025_090159.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: 334,697

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: 0001415889-25-001429 · form4-01142025_090148.xml · derivative · entry 4

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,094

Underlying: Common Stock · 1,094 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.

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On April 12, 2021, the reporting person was granted 17,500 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

F5 · derivative.expiration_date: On April 12, 2021, the reporting person was granted 17,500 RSUs, one fourth of which vested on April 12, 2022, with an additional one-sixteenth of such RSUs vesting every three months thereafter. One-sixteenth of these RSUs vested on January 12, 2025.

SEC source: 0001415889-25-001429 · form4-01142025_090148.xml · nonDerivative · entry 1

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,924

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: 0001415889-24-030169 · form4-12262024_101221.xml · nonDerivative · entry 3

PHELAN CATHAL G · CIK 0001259761 · Director · CHIEF INNOVATION OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,979

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units.

F3 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $146.17 to $146.37, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-24-030169 · form4-12262024_101221.xml · nonDerivative · entry 2

PHELAN CATHAL G · CIK 0001259761 · Director · CHIEF INNOVATION OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,152

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units.

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $144.9701 to $145.7301 inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-24-030168 · form4-12262024_101248.xml · nonDerivative · entry 4

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,830

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

SEC source: 0001415889-24-030168 · form4-12262024_101248.xml · nonDerivative · entry 3

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 60,840

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $145.715 to $146.33, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-24-030167 · form4-12262024_101231.xml · nonDerivative · entry 4

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,180

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

SEC source: 0001415889-24-030167 · form4-12262024_101231.xml · nonDerivative · entry 3

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,185

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $145.4101 to $146.33, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-24-030166 · form4-12262024_101255.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: 331,572

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $145.50 to $146.37, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-24-030164 · form4-12262024_091251.xml · nonDerivative · entry 3

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,107

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units ("RSUs").

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $145.4101 to $146.37, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-24-030169 · form4-12262024_101221.xml · derivative · entry 4

PHELAN CATHAL G · CIK 0001259761 · Director · CHIEF INNOVATION OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,719

Underlying: Common Stock · 413 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.

F4 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 6,610 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

F5 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 6,610 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

SEC source: 0001415889-24-030169 · form4-12262024_101221.xml · nonDerivative · entry 1

PHELAN CATHAL G · CIK 0001259761 · Director · CHIEF INNOVATION OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,189

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: 0001415889-24-030168 · form4-12262024_101248.xml · derivative · entry 6

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,759

Underlying: Common Stock · 529 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 8,460 RSU. One-sixteenth of these RSUs vested on December 23, 2024.

F5 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 8,460 RSU. One-sixteenth of these RSUs vested on December 23, 2024.

SEC source: 0001415889-24-030168 · form4-12262024_101248.xml · derivative · entry 5

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,813

Underlying: Common Stock · 1,562 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2022, the reporting person was granted 25,000 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

F4 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 25,000 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

SEC source: 0001415889-24-030168 · form4-12262024_101248.xml · nonDerivative · entry 2

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,656

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: 0001415889-24-030168 · form4-12262024_101248.xml · nonDerivative · entry 1

MECKLAI HUSSEIN · CIK 0001908089 · CHIEF OPERATING OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 61,127

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: 0001415889-24-030167 · form4-12262024_101231.xml · derivative · entry 6

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,759

Underlying: Common Stock · 529 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 8,460 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

F5 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 8,460 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

SEC source: 0001415889-24-030167 · form4-12262024_101231.xml · derivative · entry 5

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,688

Underlying: Common Stock · 937 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2022, the reporting person was granted 15,000 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

F4 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 15,000 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

SEC source: 0001415889-24-030167 · form4-12262024_101231.xml · nonDerivative · entry 2

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,760

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: 0001415889-24-030167 · form4-12262024_101231.xml · nonDerivative · entry 1

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,231

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: 0001415889-24-030166 · form4-12262024_101255.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: 11,014

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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

F5 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 19,580 RSUs. One-sixteenth of these RSUs vested on December 23, 2024.

SEC source: 0001415889-24-030166 · form4-12262024_101255.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: 12,969

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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these RSUs vested on Decenber 23, 2024.

F4 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 41,500 RSUs. One-sixteenth of these RSUs vested on Decenber 23, 2024.

SEC source: 0001415889-24-030166 · form4-12262024_101255.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: 333,076

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: 0001415889-24-030166 · form4-12262024_101255.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: 331,852

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: 0001415889-24-030164 · form4-12262024_091251.xml · derivative · entry 5

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,312

Underlying: Common Stock · 479 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F5 · derivative.exercise_date: On March 23, 2023, the reporting person was granted 7,665 RSUs, one sixteenth of which vested on December 23, 2024.

F5 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 7,665 RSUs, one sixteenth of which vested on December 23, 2024.

SEC source: 0001415889-24-030164 · form4-12262024_091251.xml · derivative · entry 4

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,907

Underlying: Common Stock · 781 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: On March 23, 2022, the reporting person was granted 12,500 RSUs, one sixteenth of which vested on December 23, 2024.

F4 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 12,500 RSUs, one sixteenth of which vested on December 23, 2024.

SEC source: 0001415889-24-030164 · form4-12262024_091251.xml · nonDerivative · entry 2

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,606

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: 0001415889-24-030164 · form4-12262024_091251.xml · nonDerivative · entry 1

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,127

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: 0001415889-24-027531 · form4-11222024_091139.xml · nonDerivative · entry 2

PHELAN CATHAL G · CIK 0001259761 · Director · CHIEF INNOVATION OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,776

F1 · kind: These shares were disposed of in non-discretionary transactions to cover the reporting person's tax withholding obligations in connection with the settlement of an award of restricted stock units.

F2 · price: The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $185.955 to $186.655 inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein.

SEC source: 0001415889-24-027531 · form4-11222024_091139.xml · derivative · entry 3

PHELAN CATHAL G · CIK 0001259761 · Director · CHIEF INNOVATION OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,375

Underlying: Common Stock · 1,375 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.

F3 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Impinj common stock.

F4 · derivative.exercise_date: One-fourth of the shares subject to the grant vested on February 20, 2024, and 1/16th of the shares subject to the grant vest each quarter thereafter, subject to the Reporting Person's continued service to the Issuer through such date.

F4 · derivative.expiration_date: One-fourth of the shares subject to the grant vested on February 20, 2024, and 1/16th of the shares subject to the grant vest each quarter thereafter, subject to the Reporting Person's continued service to the Issuer through such date.

SEC source: 0001415889-24-027531 · form4-11222024_091139.xml · nonDerivative · entry 1

PHELAN CATHAL G · CIK 0001259761 · Director · CHIEF INNOVATION OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,473

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: 0001415889-24-026897 · form4-11142024_111133.xml · derivative · entry 15

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,153

Underlying: Common Stock · 7,500 shares

Expires 2028-05-16

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.

F13 · derivative.exercise_date: One-fourth of the shares subject to the option vested on November 16, 2018, and 1/48th of the shares subject to the option vest on the 3rd day of each month thereafter

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · nonDerivative · entry 13

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 65,294

F1 · kind: The sales reported by Mr. Dossett were effected pursuant to a 10b5-1 trading plan effective August 13, 2024.

F12 · price: This transaction was executed in multiple trades at prices ranging from $184.20 to $184.88. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · nonDerivative · entry 12

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,050

F1 · kind: The sales reported by Mr. Dossett were effected pursuant to a 10b5-1 trading plan effective August 13, 2024.

F11 · price: This transaction was executed in multiple trades at prices ranging from $182.77 to $183.575. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · nonDerivative · entry 11

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 66,701

F1 · kind: The sales reported by Mr. Dossett were effected pursuant to a 10b5-1 trading plan effective August 13, 2024.

F10 · price: This transaction was executed in multiple trades at prices ranging from $181.66 to $182.41. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · nonDerivative · entry 10

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 67,606

F1 · kind: The sales reported by Mr. Dossett were effected pursuant to a 10b5-1 trading plan effective August 13, 2024.

F9 · price: This transaction was executed in multiple trades at prices ranging from $180.625 to $181.565. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · nonDerivative · entry 9

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 69,904

F1 · kind: The sales reported by Mr. Dossett were effected pursuant to a 10b5-1 trading plan effective August 13, 2024.

F8 · price: This transaction was executed in multiple trades at prices ranging from $179.615 to $180.52. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · nonDerivative · entry 8

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 71,602

F1 · kind: The sales reported by Mr. Dossett were effected pursuant to a 10b5-1 trading plan effective August 13, 2024.

F7 · price: This transaction was executed in multiple trades at prices ranging from $178.57 to $179.56. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · nonDerivative · entry 7

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 72,794

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: 0002003074-24-000023 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Remarks

Gibson Daniel Patrick · CIK 0001745725 · Director

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 2,129,260

F1 · ownership.nature: Sylebra Capital Limited (Sylebra HK) and Sylebra Capital LLC (Sylebra US) are the investment sub-advisers to Sylebra Capital Partners Master Fund, Ltd. (SCP MF),Sylebra Capital Parc Master Fund (PARC MF), Sylebra Capital Menlo Master Fund (MENLO MF), and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is theinvestment manager and parent of Sylebra HK. Sylebra Cayman owns 100% of the shares of Sylebra HK, and Daniel Patrick Gibson (Gibson) owns 100% of Class A shares ofSylebra Cayman and 100% of the share capital of Sylebra US. Gibson is a founder and Chief Investment Officer of Sylebra Cayman. In such capacities, Sylebra HK, Sylebra US, Sylebra Cayman and Gibson may be deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF,PARC MF, MENLOMF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, PARC MF, MENLO MF, and other advisory clients. Gibson is a member of the board of directors of the Issuer. Sylebra HK, Sylebra US,Sylebra Cayman and Gibson disclaim beneficial ownership of these securities, and this report shall not be deemed an admission that Sylebra HK, Sylebra US, SylebraCayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0001415889-24-026897 · form4-11142024_111133.xml · derivative · entry 14

DOSSETT JEFFREY · CIK 0001578147 · CHIEF REVENUE OFFICER

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,653

Underlying: Common Stock · 7,500 shares

Expires 2028-05-16

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.

F13 · derivative.exercise_date: One-fourth of the shares subject to the option vested on November 16, 2018, and 1/48th of the shares subject to the option vest on the 3rd day of each month thereafter