Results of Operations and Financial Condition On August 7, 2026, Ultralife Corporation issued a press release regarding the financial results for its second quarter ended June 30, 2026. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On May 8, 2026, Ultralife Corporation issued a press release regarding the financial results for its first quarter ended March 31, 2026. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On March 10, 2026, Ultralife Corporation issued a press release regarding the financial results for its fourth quarter ended December 31, 2025. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On November 18, 2025, Ultralife Corporation issued a press release regarding the financial results for its third quarter ended September 30, 2025. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Changes in Registrant ’ s Certifying Accountant. (a) Replacement of Previous Independent Registered Public Accounting Firm On August 22, 2025, the Audit and Finance Committee (the “ Committee ”) of the Board of Directors (the “ Board ”) of Ultralife Corporation, Inc. (the “ Company ”) approved the replacement of Freed Maxick P.C. (“ FM ”) as the Company’s independent registered public accounting firm, due to the acquisition of certain assets of FM by Withum Smith+Brown, PC (“ Withum ”), effec…

Results of Operations and Financial Condition On August 7, 2025, Ultralife Corporation issued a press release regarding the financial results for its second quarter ended June 30, 2025. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On May 9, 2025, Ultralife Corporation issued a press release regarding the financial results for its first quarter ended March 31, 2025. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On April 1, 2025, Ultralife Corporation issued a press release regarding the financial results for its fourth quarter and full year ended December 31, 2024. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On November 8, 2024, Ultralife Corporation issued a press release regarding the financial results for its third quarter ended September 30, 2024. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Entry into a Material Definitive Agreement Stock Purchase Agreement for Shares of Electrochem Solutions, Inc. On September 27, 2024, Ultralife Corporation, a Delaware corporation (“Ultralife” or the “Company”), entered into a stock purchase agreement (the “Agreement”) with Greatbatch Ltd., a New York corporation (the “Seller”) and a subsidiary of Integer Holdings Corporation, relating to the acquisition by the Company of all the issued and outstanding shares of Electrochem Solutions, Inc., a…

Results of Operations and Financial Condition On July 25, 2024, Ultralife Corporation issued a press release regarding the financial results for its second quarter ended June 30, 2024. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On April 25, 2024, Ultralife Corporation issued a press release regarding the financial results for its first quarter ended March 31, 2024. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On February 15, 2024, Ultralife Corporation issued a press release regarding the financial results for its fourth quarter and full year ended December 31, 2023. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On October 26, 2023, Ultralife Corporation issued a press release regarding the financial results for its third quarter ended September 30, 2023. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On July 27, 2023, Ultralife Corporation issued a press release regarding the financial results for its second quarter ended June 30, 2023. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On April 27, 2023, Ultralife Corporation issued a press release regarding the financial results for its first quarter ended March 31, 2023. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Results of Operations and Financial Condition On March 2, 2023, Ultralife Corporation issued a press release regarding the financial results for its fourth quarter ended December 31, 2022. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference.

Other Matters During the Company’s fourth quarter earnings conference call on March 2, 2023, the Company announced the following: On January 25, 2023, during performance of their daily, morning information technology security procedures, our Information Technology Team discovered an unauthorized entry into our information technology systems for our Newark, N.Y. and Virginia Beach locations. The accounts in question were immediately disabled by our IT Team, and the Company’s Information Securi…

Director — Janie Goddard: Ms. Janie Goddard was appointed as an independent director of the Company.

CEO — Michael D. Popielec: Mr. Popielec is leaving the Company and resigning from his position as CEO.

Results of Operations and Financial Condition On October 27, 2022, Ultralife Corporation issued a press release regarding the financial results for its third quarter ended September 30, 2022. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference. The information set forth in this Form 8-K and the attached exhibit is being furnished to and not filed with the Securities and Exchange Commission and shall not be deemed as incorporated by refe…

Results of Operations and Financial Condition On July 28, 2022, Ultralife Corporation issued a press release regarding the financial results for its second quarter ended June 30, 2022. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by this reference. The information set forth in this Form 8-K and the attached exhibit is being furnished to and not filed with the Securities and Exchange Commission and shall not be deemed as incorporated by reference i…