X0202 SCHEDULE 13D/A 0002025889 XXXXXXXX LIVE 6 Common Shares, without par value 05/07/2026 false 0001722606 59124U605 Metalla Royalty & Streaming Ltd.

543 Granville Street Suite 501 Vancouver A1 V6C 1X8

Tether Global Investments Fund 4420 4621 1793 Final Av. La Revolucion, Edif. Centro Corporativo Presidente Plaza, Nivel 12 San Salvador H3 00000 Daniel Woodard (212) 547-5400 McDermott Will & Schulte LLP One Vanderbilt Avenue New York NY 10017 0002025889 N Tether Global Investments Fund, S.I.C.A.F., S.A. OO Y H3 0.00 10266571.00 0.00 10266571.00 10266571.00 N 11.0 CO Note in relation to Items 8, 10 and 11: Includes 9,266,571 common shares, no par value ("Common Shares") of Metalla Royalty & Streaming Ltd. held by Tether International, S.A. de C.V., a controlled subsidiary of Tether Global Investments Fund, S.I.C.A.F., S.A., and 1,000,000 Common Shares held by Tether Investments, S.A. de C.V., a controlled subsidiary of Tether Global Investments Fund, S.I.C.A.F., S.A. Note in relation to Item 13: This percentage is calculated based upon 93,442,762 shares outstanding as of March 26, 2026, as reported in the Annual Information Report filed as an exhibit to the Form 40-F filed with the Securities and Exchange Commission on March 26, 2026. Y Tether International, S.A. de C.V. WC N H3 0.00 9266571.00 0.00 9266571.00 9266571.00 N 9.9 CO Note in relation to Item 13: This percentage is calculated based upon 93,442,762 shares outstanding as of March 26, 2026, as reported in the Annual Information Report filed as an exhibit to the Form 40-F filed with the Securities and Exchange Commission on March 26, 2026. 0002049832 N Tether Investments, S.A. de C.V. WC N H3 0.00 1000000.00 0.00 1000000.00 1000000.00 N 1.1 CO Note in relation to Item 13: This percentage is calculated based upon 93,442,762 shares outstanding as of March 26, 2026, as reported in the Annual Information Report filed as an exhibit to the Form 40-F filed with the Securities and Exchange Commission on March 26, 2026. 0002050373 N Giancarlo Devasini OO N L6 0.00 10266571.00 0.00 10266571.00 10266571.00 N 11.0 IN Note in relation to Items 8, 10 and 11: Includes 9,266,571 Common Shares held by Tether International, S.A. de C.V. a controlled subsidiary of Tether Global Investments Fund, S.I.C.A.F., S.A., and 1,000,000 Common Shares held by Tether Investments, S.A. de C.V., a controlled subsidiary of Tether Global Investments Fund, S.I.C.A.F., S.A. Mr. Devasini has a greater than 50% voting interest in Tether Global Investments Fund, S.I.C.A.F., S.A. The reporting person disclaims beneficial ownership of these shares except to the extent of the reporting person's pecuniary interest. Note in relation to Item 13: This percentage is calculated based upon 93,442,762 shares outstanding as of March 26, 2026, as reported in the Annual Information Report filed as an exhibit to the Form 40-F filed with the Securities and Exchange Commission on March 26, 2026. Common Shares, without par value Metalla Royalty & Streaming Ltd. 543 Granville Street Suite 501 Vancouver A1 V6C 1X8 This statement on Schedule 13D amends the Schedule 13D of Tether Holdings, S.A. de C.V., an El Salvador entity, Tether Investments, S.A. de C.V., an El Salvador entity ("Tether Investments") and Giancarlo Devasini that was originally filed with the Securities and Exchange Commission (the "SEC") on October 24, 2025, as amended by Amendment No. 1 filed on December 9, 2025, Amendment No. 2 filed on January 9, 2026, Amendment No. 3 filed on February 4, 2026, Amendment No. 4 filed on March 12, 2026 and Amendment No. 5 filed on March 26, 2026 (as amended, the "Schedule 13D") with respect to the common shares, without par value ("Common Shares") of Metalla Royalty & Streaming Ltd., a Canadian corporation (the "Issuer"). This amendment to the Schedule 13D is being filed by Tether Global Investments Fund, S.I.C.A.F., S.A. (f/k/a Tether Holdings, S.A. de C.V.), an El Salvador entity, Tether International, S.A. de C.V., an El Salvador entity, Tether Investments, and Giancarlo Devasini (collectively, the "Reporting Persons") and constitutes Amendment No. 6 to the Schedule 13D. Capitalized terms used but not defined herein have the meanings given to such terms in the Schedule 13D. Except as set forth herein, the Schedule13D is unmodified. The Reporting Persons beneficially own an aggregate of 10,266,571 Common Shares, representing 11.0% of the outstanding Common Shares. This percentage is calculated based on 93,442,762 shares outstanding as of March 26, 2026, as reported in the Annual Information Report filed as an exhibit to the Form 40-F filed with the Securities and Exchange Commission on March 26, 2026. Each of Tether Global Investments Fund, S.I.C.A.F., S.A. and Mr. Devasini has shared voting and dispositive power with respect to the beneficially owned 10,266,571 Common Shares. Tether International, S.A. de C.V. has shared voting and dispositive power with respect to 9,266,571 Common Shares. Tether Investments has shared voting and dispositive power with respect to 1,000,000 Common Shares. Schedule B sets forth the transactions in the Common Shares effected by the Reporting Persons since the Reporting Persons' most recent filing on March 26, 2026. None. Not applicable. Schedule A Executive Officers and Directors Schedule B Open Market Purchases 99.1 Agreement of filing persons relating to filing of joint statement per Rule 13d-1(k). Tether Global Investments Fund, S.I.C.A.F., S.A. /s/ Omar Rossi 05/11/2026 Tether International, S.A. de C.V. /s/ Giancarlo Devasini 05/11/2026 Tether Investments, S.A. de C.V. /s/ Giancarlo Devasini 05/11/2026 Giancarlo Devasini /s/ Giancarlo Devasini 05/11/2026