FIRST SOLAR, INC. — Major Shareholding Notification 2025

May 15, 2025

xml version="1.0" encoding="UTF-8"? SCHEDULE 13G 0001446580 XXXXXXXX LIVE Common stock, $0.001 par value per share 03/31/2025 0001274494 First Solar, Inc. 336433107 350 West Washington Street Suite 600 Tempe AZ 85288 Rule 13d-1(b) SIG Brokerage, LP DE 810 6363027 810 6363027 6363027 5.9 BD PN With respect to Row 5 through Row 9 above, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person. Susquehanna Investment Group PA 101361 6363027 101361 6363027 6363027 5.9 BD PN With respect to Row 5 through Row 9 above, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person. Susquehanna Securities, LLC DE 6260856 6363027 6260856 6363027 6363027 5.9 BD OO With respect to Row 5 through Row 9 above, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person. First Solar, Inc. 350 West Washington Street, Suite 600, Tempe, Arizona 85288 This statement is filed by the entities listed below, who are collectively referred to herein as "Reporting Persons" with respect to the shares of Common stock, $0.001 par value per share (the "Shares"), of First Solar, Inc. (the "Company"). (i) SIG Brokerage, LP (ii) Susquehanna Investment Group (iii) Susquehanna Securities, LLC The address of the principal business office of each of SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC is: 401 E. City Avenue Suite 220 Bala Cynwyd, PA 19004 Citizenship is set forth in Row 4 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. N BD The information required by this Item 4(a) is set forth in Row 9 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The number of Shares reported as beneficially owned by Susquehanna Investment Group includes options to buy 63,300 Shares. The number of Shares reported as beneficially owned by Susquehanna Securities, LLC includes options to buy 5,344,500 Shares. The Company's Proxy Statement on Schedule 14A, filed on April 4, 2025, indicates that there were 107,240,417 Shares outstanding as of March 20, 2025. 5.9 The information required by this Item 4(c)(i) is set forth in Row 5 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The information required by this Item 4(c)(ii) is set forth in Row 6 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The information required by this Item 4(c)(iii) is set forth in Row 7 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. The information required by this Item 4(c)(iv) is set forth in Row 8 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person. Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. EXHIBIT INDEX EXHIBIT DESCRIPTION _ _ 99 Joint Filing Agreement SIG Brokerage, LP /s/ Brian Sopinsky Brian Sopinsky, Assistant Secretary 05/15/2025 Susquehanna Investment Group /s/ Brian Sopinsky Brian Sopinsky, General Counsel 05/15/2025 Susquehanna Securities, LLC /s/ Brian Sopinsky Brian Sopinsky, Secretary 05/15/2025