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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D/A 0001085146-24-002696 0002003074 XXXXXXXX LIVE 6 Common Stock 12/15/2025 false 0001114995 453204109 IMPINJ INC 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 Matthew Whitehead 332-242-8518 3000 EL CAMINO REAL BUILDING 5 SUITE 450 Palo Alto CA 94306 0002003074 N SYLEBRA CAPITAL LLC WC N DE 0.00 1132152.00 0.00 1132152.00 1132152.00 N 3.76 IA HC 0001627436 N Sylebra Capital Ltd WC N K3 0.00 1132152.00 0.00 1132152.00 1132152.00 N 3.76 IA HC 0001745666 N Sylebra Capital Management, Ltd WC N E9 0.00 1132152.00 0.00 1132152.00 1132152.00 N 3.76 IA HC 0001745725 N Gibson Daniel Patrick WC N B9 0.00 1132152.00 0.00 1132152.00 1132152.00 N 3.76 IN Common Stock IMPINJ INC 400 FAIRVIEW AVENUE NORTH SUITE 1200 SEATTLE WA 98109 This Amendment on Schedule 13D/A amends the Schedule 13D filed by the Reporting Persons with the Securities and Exchange Commission on June 10, 2024, as amended from time to time (the "Schedule 13D"), relating to the shares of common stock, par value $0.001 per share ("Common Stock"), of Impinj, Inc.(the "Issuer"). The principal executive offices of the Issuer are located at: 400 Fairview Avenue North, Suite 1200, Seattle WA 98109. Except as specifically provided herein, this Amendment does not modify any of the information previously reported in the Schedule 13D. Unless otherwise indicated herein, capitalized terms used but not defined in this Amendment shall have the same meanings herein as are ascribed to such terms in the Schedule 13D. Sylebra Capital LLC ("Sylebra US") hereby files this Amendment on behalf of the Reporting Persons pursuant to the Agreement with Respect to Schedule 13D (the Joint Filing Agreement) attached to this Statement as Exhibit 1. Sylebra US and Sylebra Capital Limited ("Sylebra HK") 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. The term Affiliated Investment Entities refers to SCP MF, MENLO MF and the 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 the 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 the Affiliated Investment Entities. Sylebra US, Sylebra HK, Sylebra Cayman and Gibson are each referred to herein individually as a Reporting Person and collectively as the Reporting Persons. SYLEBRA CAPITAL LLC - 3000 El Camino Real, Building 5, Suite 450, Palo Alto, CA 94306 Sylebra Capital Ltd - 20th Floor, 256 Hennessy Road, Wan Chai, Hong Kong Sylebra Capital Management, Ltd - c/o Walkers Corporate Limited, 190 Elgin Avenue, George Town Grand Cayman KY1-9008, Cayman Islands Gibson Daniel Patrick - 3000 El Camino Real, Building 5, Suite 450, Palo Alto, CA 94306 SYLEBRA CAPITAL LLC - Investment Sub-Adviser Sylebra Capital Ltd - Investment Sub-Adviser Sylebra Capital Management, Ltd - Investment Manager Gibson Daniel Patrick - (i) director and owner of Sylebra Capital Limited and Sylebra Capital Management and (ii) a sole member of Sylebra Capital LLC SYLEBRA CAPITAL LLC - None Sylebra Capital Ltd - None Sylebra Capital Management, Ltd - None Gibson Daniel Patrick - None SYLEBRA CAPITAL LLC - None Sylebra Capital Ltd - None Sylebra Capital Management, Ltd - None Gibson Daniel Patrick - None SYLEBRA CAPITAL LLC - Delaware, US Sylebra Capital Ltd - Hong Kong Sylebra Capital Management, Ltd - Cayman Islands Gibson Daniel Patrick - Antiqua and Barbuda N/A as this was a disposal of securities. N/A as this was a disposal of securities. The disposal of shares was conducted in the ordinary course of portfolio management. SYLEBRA CAPITAL LLC - 1,132,152; 3.76% Sylebra Capital Ltd - 1,132,152; 3.76% Sylebra Capital Management, Ltd - 1,132,152; 3.76% Gibson Daniel Patrick - 1,132,152; 3.76% SYLEBRA CAPITAL LLC - 1,132,152 Sylebra Capital Ltd - 1,132,152 Sylebra Capital Management, Ltd - 1,132,152 Gibson Daniel Patrick - 1,132,152 Please refer to exhibit 2 in relation to the transactions with respect to the Issuers common stock within the last 60 days by the Reporting Persons. No person other than the Reporting Persons has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Issuer's Common Stock. 12/4/2025 Except for the Joint Filing Agreement attached hereto as Exhibit 1, to the knowledge of the Reporting Persons, there are no contracts, arrangements, understandings or relationships (legal or otherwise) among the Reporting Persons or, to the knowledge of any of the Reporting Persons, any other person or entity referred to in Item 2, or between such persons and any other person, with respect to any securities of the Issuer, including, but not limited to, transfer or voting of any of the securities, finders fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or loss, or the giving or withholding of proxies. Exhibit 1 Joint Filing Agreement, dated as of December 16, 2025 by and among the Reporting Persons. Exhibit 2 - Transaction history. SYLEBRA CAPITAL LLC /s/ Matthew Whitehead Matthew Whitehead, Authorized Signatory 12/17/2025 Sylebra Capital Ltd /s/ Matthew Whitehead Matthew Whitehead, Authorized Signatory 12/17/2025 Sylebra Capital Management, Ltd /s/ Matthew Whitehead Matthew Whitehead, Authorized Signatory 12/17/2025 Gibson Daniel Patrick /s/ Daniel Patrick Gibson Daniel Patrick Gibson, Individual 12/17/2025