Results of Operations and Financial Condition. On May 12, 2026, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the first quarter ended March 31, 2026 and a business update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act…

Results of Operations and Financial Condition. On March 12, 2026, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the fourth quarter and full year ended December 31, 2025 and a business update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Sec…

Results of Operations and Financial Condition. On November 12, 2025, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2025 and a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Ex…

Costs Associated with Exit or Disposal Activities. On October 1, 2025, Bolt Biotherapeutics, Inc., a Delaware corporation (the “Company”), implemented a restructuring plan pursuant to which it will reduce overall operating expenses to preserve cash. The restructuring plan includes a reduction of the Company’s current workforce by approximately 20 employees, or approximately 50% of the Company’s workforce. The Company estimates that it will incur aggregate pre-tax charges between approximately…

Other Events On October 1, 2025, the Company announced an update on the ongoing Phase 1 dose escalation study of BDC-4182, a next-generation Boltbody™ ISAC clinical candidate targeting claudin 18.2, a clinically validated target in oncology. A strong immune response was observed at the initial dose levels and the Company is in the process of modifying the clinical trial protocol to allow for step-up dosing, which has been successfully used commercially for T-cell engagers. BDC-4182 preclinica…

Results of Operations and Financial Condition. On August 14, 2025, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the second quarter ended June 30, 2025 and a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange…

Results of Operations and Financial Condition. On May 12, 2025, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the first quarter ended March 31, 2025 and a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Ac…

Results of Operations and Financial Condition. On March 24, 2025, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the fourth and full year ended December 31, 2024 and a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities…

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. As previously disclosed, on July 2, 2024, the Listing Qualifications Department of The Nasdaq Stock Market LLC (“Nasdaq”) notified Bolt Biotherapeutics, Inc. (the “Company”) that, based on the previous 30 consecutive business days, its common stock no longer met the minimum $1.00 bid price per share requirement for continued listing on The Nasdaq Global Select Market under Nasdaq Listing Rule…

Director — Dr. Mahendra Shah, Ph.D.: Dr. Shah resigned due to personal reasons and was succeeded by Dr. Jakob Dupont, M.D.

Results of Operations and Financial Condition. On November 12, 2024, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2024 and a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Ex…

Director — James Healy, M.D., Ph.D.: Dr. James Healy resigned as a member of the Board and was succeeded by Dr. Jakob Dupont.

Results of Operations and Financial Condition. On August 13, 2024, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the second quarter ended June 30, 2024 and a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange…

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing. On July 2, 2024, Bolt Biotherapeutics, Inc. received a written notice from the Listing Qualifications Department of The Nasdaq Stock Market, LLC (“Nasdaq”) notifying us that on July 1, 2024, the average closing price of our common stock over the prior 30 consecutive trading days had fallen below $1.00 per share, which is the minimum average closing price required to maintain listing on the Nas…

Results of Operations and Financial Condition. On May 14, 2024, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the first quarter ended March 31, 2024 and a corporate update. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Ac…

above, Edith A. Perez, M.D. is stepping down as the Company’s Chief Medical Officer of the Company, effective as of May 15, 2024, as the Company is eliminating the position of Chief Medical Officer. Dr. Perez will continue to be an employee of the Company through July 15, 2024, at which time she will become an advisor to the Company pursuant to a consulting agreement entered into on May 13, 2024 (the “Perez Consulting Agreement”). Pursuant to the Perez Consulting Agreement, the Company and Dr…

Director, CEO — Edgar G. Engleman, M.D.: Dr. Engleman resigned from the Board and CEO position as part of a reduction-in-force.

Results of Operations and Financial Condition. On March 21, 2024, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the fourth quarter and year ended December 31, 2023. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 193…

Results of Operations and Financial Condition. On November 9, 2023, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the third quarter ended September 30, 2023. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as a…

Results of Operations and Financial Condition. On August 7, 2023, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the second quarter ended June 30, 2023. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended…

Results of Operations and Financial Condition. On May 11, 2023, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the first quarter ended March 31, 2023. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit is furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended,…

Results of Operations and Financial Condition. On March 29, 2023, Bolt Biotherapeutics, Inc. (the “Company”) issued a press release announcing its financial results for the fourth quarter ended December 31, 2022. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference.

Director — Laura Berner: Laura Berner was appointed as a Class I director of the Company.

Results of Operations and Financial Condition. On November 10, 2022, Bolt Biotherapeutics, Inc. issued a press release announcing its financial results for the third quarter ended September 30, 2022. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit are furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or oth…

Results of Operations and Financial Condition. On August 10, 2022, Bolt Biotherapeutics, Inc. issued a press release announcing its financial results for the second quarter ended June 30, 2022. A copy of the press release is furnished herewith as Exhibit 99.1 and incorporated herein by reference. The information contained herein and the accompanying exhibit are furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise…