Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. On October 20, 2026, SenesTech, Inc. (the “Company”) received a letter from the listing qualifications staff (the “Staff”) of The Nasdaq Stock Market LLC (“Nasdaq”) providing notification that the bid price for the Company’s common stock had closed below $1.00 per share for the previous 30 consecutive business days and the Company’s common stock no longer meets the minimum bid price requiremen…

Results of Operations and Financial Condition. On October 15, 2026, SenesTech, Inc. (the "Company") issued a press release announcing preliminary revenue for the three months ended September 30, 2026. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference. The preliminary revenue information included in the press release is unaudited and subject to the completion of the Company’s normal quarter-end financial reporting p…

Results of Operations and Financial Condition. On August 5, 2026 , we announced our financial results for the second quarter ended June 30, 2026 . A copy of our press release announcing these financial results and certain other information is attached as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference. The information in this Item 2.02 (including Exhibit 99.1) shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 19…

Results of Operations and Financial Condition. On August 3, 2026, SenesTech, Inc. (the "Company") issued a press release discussing, among other things, the growth of its e-commerce business during the second quarter of 2026. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference. The information contained in this Item 2.02, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed "filed" for p…

Results of Operations and Financial Condition. On May 12, 2026 , we announced our financial results for the first quarter ended March 31, 2026 . A copy of our press release announcing these financial results and certain other information is attached as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference. The information in this Item 2.02 (including Exhibit 99.1) shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934…

President and Chief Executive Officer — Michael Edell: Michael Edell was promoted to President and Chief Executive Officer, succeeding Joel L. Fruendt.

Results of Operations and Financial Condition. On March 12, 2026 , we announced our financial results for the fourth quarter and fiscal year ended December 31, 2025 . A copy of our press release announcing these financial results and certain other information is attached as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference . The information in this Item 2.02 (including Exhibit 99.1) is furnished and shall not be deemed “filed” for purposes of Section 18 of t…

President and CEO — Joel L. Fruendt: Joel L. Fruendt is retiring as President and CEO with a named successor to be appointed.

President and CEO — Joel L. Fruendt: The President and CEO is retiring, creating a significant leadership transition.

Interim Chief Operating Officer — Michael Edell: Appointment of Michael Edell as Interim Chief Operating Officer with specific terms and conditions.

and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing. We do not have, and expressly disclaim, any obligation to release publicly any updates or any changes in our expectations or any changes in events, conditio…

Interim Chief Operating Officer — Michael Edell: Michael Edell was appointed as Interim Chief Operating Officer.

Other Events. On September 24, 2025, we filed a prospectus supplement (the “Prospectus Supplement”) to register an additional $7,580,675 of shares (the “Shares”) of our common stock, par value $0.001 per share (“Common Stock”), issuable pursuant to the At The Market Offering Agreement between the Company and H.C. Wainwright & Co., LLC (the “Sales Agent”), dated June 20, 2024 (the “Sales Agreement”). Prior to the date hereof, we have sold an aggregate of $3,048,894.72 shares of our Common Stoc…

and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing. We do not have, and expressly disclaim, any obligation to release publicly any updates or any changes in our expectations or any changes in events, conditio…

Unregistered Sales of Equity Securities We are offering and selling the New Warrants, the Placement Agent Warrants, the New Warrant Shares and the shares of Common Stock issuable upon the exercise of the Placement Agent Warrants pursuant to the exemption from the registration requirements of the Securities Act available under Section 4(a)(2). Neither the issuance of the New Warrants, the Placement Agent Warrants, nor the New Warrant Shares or the shares of Common Stock issuable upon the exerc…

Entry into a Material Definitive Agreement. On August 4, 2025, we entered into inducement offer letter agreements (the “Inducement Letters”) with certain holders (the “Holders”) of certain of our existing warrants to purchase up to 1,458,872 shares of our common stock, par value $0.001 per share (the “Common Stock”), originally issued to the Holders on July 1, 2025, at an exercise price of $4.15 per share (the “Existing Warrants”). Pursuant to the Inducement Letters, the Holders agreed to exe…

Director — Lynn Y. Graham: The company expanded its board by adding an independent director.

Entry into a Material Definitive Agreement. On June 30, 2025, we entered into inducement offer letter agreements (the “Inducement Letters”) with certain holders (the “Holders”) of certain of our existing warrants to purchase up to 1,458,872 shares of our common stock, par value $0.001 per share (the “Common Stock”), originally issued to the Holders on March 11, 2025, at an exercise price of $2.90 per share (the “Existing Warrants”). Pursuant to the Inducement Letters, the Holders agreed to ex…

Unregistered Sales of Equity Securities We are offering and selling the New Warrants, the Placement Agent Warrants, the New Warrant Shares and the shares of Common Stock issuable upon the exercise of the Placement Agent Warrants pursuant to the exemption from the registration requirements of the Securities Act available under Section 4(a)(2). Neither the issuance of the New Warrants, the Placement Agent Warrants, nor the New Warrant Shares or the shares of Common Stock issuable upon the exerc…

Other Events. On June 30, 2025, we filed a prospectus supplement (the “Prospectus Supplement”) to register an additional $711,227 of shares (the “Shares”) of our common stock, par value $0.001 per share (“Common Stock”), issuable pursuant to the At The Market Offering Agreement between the Company and H.C. Wainwright & Co., LLC (the “Sales Agent”), dated June 20, 2024 (the “Sales Agreement”). Prior to the date hereof, we have sold an aggregate of $2,854,827.84 shares of our Common Stock throu…

and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing. We do not have, and expressly disclaim, any obligation to release publicly any updates or any changes in our expectations or any changes in events, conditio…

and shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such a filing. We do not have, and expressly disclaim, any obligation to release publicly any updates or any changes in our expectations or any changes in events, conditio…

Entry into a Material Definitive Agreement. On March 9, 2025, we entered into inducement offer letter agreements (the “Inducement Letters”) with certain holders (the “Holders”) of certain of our existing warrants to purchase up to 374,718 shares of our common stock, par value $0.001 per share (the “Common Stock”), originally issued to the Holders on August 23, 2024, at an exercise price of $4.35 per share (the “Existing Warrants”). Pursuant to the Inducement Letters, the Holders agreed to exe…

Unregistered Sales of Equity Securities. We are offering and selling the New Warrants, the Placement Agent Warrants, the New Warrant Shares and the shares of Common Stock issuable upon the exercise of the Placement Agent Warrants pursuant to the exemption from the registration requirements of the Securities Act available under Section 4(a)(2). Neither the issuance of the New Warrants, the Placement Agent Warrants, nor the New Warrant Shares or the shares of Common Stock issuable upon the exer…

Director — Joshua M. Moss: The company appointed Joshua M. Moss as an independent director and increased the board size to six members.