PI

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: 0001705407-25-000004 · form4-12232025_111212.xml · derivative · entry 7

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,370

Underlying: Common Stock · 596 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 9,545 RSUs. One-sixteenth of these vested on December 23, 2025.

F5 · derivative.expiration_date: On March 23, 2024, the reporting person was granted 9,545 RSUs. One-sixteenth of these vested on December 23, 2025.

SEC source: 0001705407-25-000004 · form4-12232025_111212.xml · derivative · entry 6

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,396

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.

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 7,665 RSUs. One-sixteenth of these vested on December 23, 2025.

F4 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 7,665 RSUs. One-sixteenth of these vested on December 23, 2025.

SEC source: 0001705407-25-000004 · form4-12232025_111212.xml · derivative · entry 5

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 782

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.

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 12,500 RSUs. One-sixteenth of these vested on December 23, 2025.

F3 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 12,500 RSUs. One-sixteenth of these vested on December 23, 2025.

SEC source: 0001705407-25-000004 · form4-12232025_111212.xml · nonDerivative · entry 4

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,603

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: 0001705407-25-000004 · form4-12232025_111212.xml · nonDerivative · entry 3

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 82,335

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: 0001705407-25-000004 · form4-12232025_111212.xml · nonDerivative · entry 2

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,739

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: 0001705407-25-000004 · form4-12232025_111212.xml · nonDerivative · entry 1

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,260

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: 0002003074-25-000051 · primary_doc.xml · nonDerivative · entry 3

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,132,152

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 maybe deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000051 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,266,781

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 maybe deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000051 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,317,354

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 maybe deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000046 · primary_doc.xml · nonDerivative · entry 3

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,412,699

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 bedeemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000046 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,497,303

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 bedeemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000046 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,497,343

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 bedeemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000042 · primary_doc.xml · nonDerivative · entry 3

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,499,837

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000042 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,501,210

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000042 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,504,377

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000039 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,545,598

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000039 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,587,472

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000036 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,618,530

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 maybe deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000036 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,640,827

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 maybe deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0001705407-25-000003 · form4-11262025_091147.xml · nonDerivative · entry 1

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 80,479

SEC source: 0002003074-25-000034 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,675,383

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 bedeemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000034 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnote

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: 1,721,493

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 bedeemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000031 · primary_doc.xml · nonDerivative · entry 2

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnotes

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: 1,753,445

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000031 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnotes

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: 1,756,491

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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, MENLO MF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

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: 0002003074-25-000027 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnotes

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: 1,764,572

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra Cayman and 100% of the share capitalof 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, MENLOMF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000025 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnotes

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: 1,768,344

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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 deemedto share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF,MENLOMF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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, Sylebra Cayman andGibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0001969449-25-000002 · form4-11072025_111136.xml · nonDerivative · entry 1

WASHINGTON MIRON · CIK 0001969449 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,040

SEC source: 0002003074-25-000023 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnotes

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: 1,798,344

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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,MENLOMF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000022 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnotes

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: 1,804,590

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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,MENLOMF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

SEC source: 0002003074-25-000018 · primary_doc.xml · nonDerivative · entry 1

SYLEBRA CAPITAL LLC · CIK 0002003074 · See Footnotes

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: 1,827,747

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 Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment 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 of Sylebra 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,MENLOMF, and other advisory clients.

F2 · ownership.nature: These securities are held by SCP MF, MENLO MF, and/or 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,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

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: 0001821687-25-000005 · form4-10222025_091058.xml · derivative · entry 1

Valdez Arthur L Jr · CIK 0001821687 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,220

Underlying: Common Stock · 1,220 shares

Expires not disclosed

F1 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Impinj common stock.

F2 · derivative.exercise_date: The restricted stock units will fully vest on October 20, 2026.

F2 · derivative.expiration_date: The restricted stock units will fully vest on October 20, 2026.

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: 0001705407-25-000002 · form4-09242025_040905.xml · derivative · entry 7

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,966

Underlying: Common Stock · 597 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 9,545 RSUs. One-sixteenth of these vested on September 23, 2025.

F5 · derivative.expiration_date: On March 23, 2024, the reporting person was granted 9,545 RSUs. One-sixteenth of these vested on September 23, 2025.

SEC source: 0001705407-25-000002 · form4-09242025_040905.xml · derivative · entry 6

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,875

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.

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 7,665 RSUs. One-sixteenth of these vested on September 23, 2025.

F4 · derivative.expiration_date: On March 23, 2023, the reporting person was granted 7,665 RSUs. One-sixteenth of these vested on September 23, 2025.

SEC source: 0001705407-25-000002 · form4-09242025_040905.xml · derivative · entry 5

Baker Cary · CIK 0001705407 · CHIEF FINANCIAL OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,563

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.

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 12,500 RSUs. One-sixteenth of these vested on September 23, 2025.

F3 · derivative.expiration_date: On March 23, 2022, the reporting person was granted 12,500 RSUs. One-sixteenth of these vested on September 23, 2025.