Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 UNITED STATES SECURITIES AND EXCHANGE COMMISSION For the quarterly period ended June 30, 2023 ☐ TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER 001-39555 GREENWICH LIFESCIENCES, INC. (Exact Name of registrant as specified in its charter) (State or other jurisdiction (I.R.S. Employer of incor ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-Q (Mark One) ☒ QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 ☐ TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to COMMISSION FILE NUMBER 001-39555 GREENWICH LIFESCIENCES, INC. (Exact Name of registrant as specified in its charter) (State or other jurisdiction of incorporation or orga ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period from to Commission File Number: 001-39555 GREENWICH LIFESCIENCES, INC. (Exact name of registrant as specified in its charter) Delaware 20-5473709 (State or other jurisdict ...

GREENWICH LIFESCIENCES Planned GP2 Phase III Clinical Trial A Breakthrough Targeted Immunotherapy to Prevent Breast Cancer Recurrences NASDAQ: GLSI Snehal Patel, CEO David McWilliams, Chairman © 2020 GLSI Image: T-cells targeting cancer cell Safe Harbor Statement This document is the property of Greenwich LifeSciences, Inc., (the "Company" or "Greenwich LifeSciences"). This document is non-directive in nature (contains no recommendations regarding financial actions related to the Company). This document is ...