ESS Tech, Inc. — fact timeline

Raffi Garabedian was appointed as Audit Committee Member at ESS Tech, Inc..

“Raffi Garabedian will replace Mr. Hossfeld on the Audit Committee, effective as of June 12, 2026.”

Rich Hossfeld resigned as Director at ESS Tech, Inc..

“On June 12, 2026, Rich Hossfeld notified ESS Tech, Inc. (the “Company”) that he is resigning from the board of directors (the “Board”) of the Company and Audit Committee of the Board (the “Audit Committee”), effective as of June 12, 2026.”

ESS Tech, Inc. received a nyse deficiency notice notice regarding minimum bid price (rules 802.01C).

“June 9, 2026, ESS Tech, Inc. (the “Company”) received a written notice (the “Notice”) from the New York Stock Exchange (“NYSE”) indicating that the Company did not satisfy the continued listing standard set forth in Section 802.01C of the NYSE Listed Company Manual (“Section 802.01C”), as the average closing price of the Company’s common stock was less than $1.00 per share over a consecutive 30 trading-day period. As of June 8, 2026, the 30 trading-day average closing share price of the Company's common stock was $0.98. The Notice is a notice of deficiency, not delisting, and does not currentl”

ESS Tech, Inc. shareholders approved Advisory vote on the frequency of future advisory votes on the compensation of the Company’s named executive officers at the 2026-05-29 meeting.

“At the Annual Meeting, the Company’s stockholders approved, on an advisory basis, every one year as the frequency of future stockholder advisory votes on the compensation of the Company’s named executive officers.”

ESS Tech, Inc. shareholders approved Advisory vote on the compensation of the Company’s named executive officers at the 2026-05-29 meeting.

“At the Annual Meeting, the Company’s stockholders approved, on an advisory basis, the compensation of the Company’s named executive officers.”

ESS Tech, Inc. shareholders approved Ratification of the appointment of KPMG LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026 at the 2026-05-29 meeting.

“At the Annual Meeting, the Company’s stockholders ratified the appointment of KPMG LLP to serve as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026.”

ESS Tech, Inc. shareholders approved Election of two Class II directors at the 2026-05-29 meeting.

“At the Annual Meeting, the Company’s stockholders elected two Class II directors to the Board to serve until the 2029 annual meeting of stockholders and until their respective successors have been duly elected and qualified.”

ESS Tech, Inc. reported first quarter ended March 31, 2026 results: revenue $128 thousand, net income $(15.9) million, EPS $(0.54) per share.

“the Company continued its leadership and organizational reset focused on governance, execution, and financial discipline. First Quarter 2026 Financial Highlights • Revenue was $128 thousand for the three months ended March 31, 2026, compared with $0.6 million in the prior-year period due to fewer deliveries of equipment to customers. • Total operating expenses”

ESS Tech, Inc. reported year ended December 31, 2025 results: revenue $1.6 million, net income Net loss for the year ended December 31, 2025, was $63.4 million.

“Revenue was $1.6 million for the year ended December 31, 2025. The company’s business has been focused on the development and commercialization of its LDES systems. ◦ ESS delivered and recognized revenue from completed and in-process Energy Warehouses and Energy Centers (plus related equipment), engineering services for a site deployment, and extended warranty services, primarily offset by revenue reductions tied to settling and winding down legacy contracts as the Company shifted to the Energy Base offering and by lower overall sales volumes year over year. • Net loss for the year ended December 31, 2025, was $63.4 million”

ESS Tech, Inc. entered into Purchase Agreement with certain institutional investors valued at approximately $13.5 million (effective 2026-01-29).

“On January 29, 2026, ESS Tech, Inc. (the “Company”) signed a securities purchase agreement (the “Purchase Agreement”) with certain institutional investors identified on the signature pages thereto (the “Purchasers”) pursuant to which the Company agreed to issue and sell in a registered direct offering registered under the Securities Act of 1933, as amended (the “Securities Act”), an aggregate of 3,471,428 shares (the “Shares”) of the Company’s common stock (“Common Stock”), Pre-Funded Warrants to purchase an aggregate of 5,100,000 shares of Common Stock at an exercise price of $0.00001 per share (the “Pre-Funded Warrants”), and the 5,100,000 shares of Common Stock underlying the Pre-Funded Warrants (“Pre-Funded Warrant Shares”) at an offering price of $1.75 per Share or $1.74999 per Pre-Funded Warrant, as applicable (the “Registered Direct Offering”).”

ESS Tech, Inc. amended Note Amendment with YA II PN, LTD., an investment fund managed by Yorkville Advisors Global, L.P. valued at $10 million (effective 2025-12-04).

“On December 4, 2025, ESS Tech, Inc. (the “Company”) and YA II PN, LTD., an investment fund managed by Yorkville Advisors Global, L.P. (“Yorkville”), entered into Amendment No. 2 (the “Note Amendment”) to the promissory note, originally issued on October 14, 2025, and as amended on October 31, 2025 (the “First Note Amendment”), by and between the Company and Yorkville (the “Note”).”

ESS Tech, Inc. issued up to 1,052,104 shares of warrant to YA II PN, LTD., an investment fund managed by Yorkville Advisors Global, L.P. for exercise price of $9.98 per share.

“the Company issued to Yorkville a warrant exercisable for an aggregate number of up to 1,052,104 shares of the Company’s common stock (the “Warrant”). The Warrant has an exercise price of $9.98 per share”

ESS Tech, Inc. incurred loan of up to $40 million with YA II PN, LTD. at 3% per annum maturing October 14, 2026.

“On October 14, 2025, ESS Tech, Inc. (the “Company”) entered into an unsecured promissory note with YA II PN, LTD., an investment fund managed by Yorkville Advisors Global, L.P. (“Yorkville”) in the aggregate principal amount of up to $40 million”

ESS Tech, Inc. incurred lease obligation of $10,518,419.91 with UOP LLC maturing seven years.

“On July 10, 2025, the Company entered into a Sale and Leaseback Agreement (the “UOP Sale and Leaseback Agreement”) with UOP LLC (“UOP”), an affiliate of a greater than 5% stockholder of the Company, pursuant to which UOP has agreed to purchase the stack assembly line 1 used to build power module stacks for the Company’s products, including the Energy Base, for a purchase price of $10,518,419.91 (comprised of $4,000,000 in cash and $6,518,419.91 applied to certain pre-payments from UOP), and to lease such equipment back to the Company.”

ESS Tech, Inc. received a nyse noncompliance notice notice regarding market value (rules 802.01B).

“March 24, 2025, ESS Tech, Inc. (the “ Company ”) received a written notice (the “ Notice ”) from the New York Stock Exchange (the “ NYSE ”) indicating that the Company is no longer in compliance with NYSE’s continued listing standards set forth in Section 802.01B (the “ Minimum Market Capitalization Standard ”) due to the fact that the Company’s average global market capitalization over a consecutive 30 trading-day period was less than $50 million and, at the same time, its stockholders’ equity was less than $50 million. As described in the Notice, as of March 21, 2025, the Company’s 30 tradin”

Kelly F. Goodman was appointed as Interim Chief Executive Officer and Principal Executive Officer at ESS Tech, Inc..

“In connection with Mr. Dresselhuys’ departure, Kelly F. Goodman, the Company’s current Vice President of Legal and Corporate Secretary, will be appointed as the interim Chief Executive Officer and Principal Executive Officer of the Company, effective February 13, 2025, until her successor is duly appointed and qualified.”

Eric Dresselhuys departed as Chief Executive Officer at ESS Tech, Inc..

“On February 13, 2025, Eric Dresselhuys, Chief Executive Officer of ESS Tech, Inc. (the “Company”), separated from the Company and resigned as a member of Company’s Board of Directors (the “Board”).”

ESS Tech, Inc. reported first quarter ended March 31, 2024 results: revenue 2.7 Million.

“ESS Tech, Inc. Announces First Quarter 2024 Financial Results Q1 Revenue of $2.7 Million”

ESS Tech, Inc. reported fourth quarter and full year ended December 31, 2023 results: revenue $7.5M for FY 2023.

“ESS Tech, Inc. (“ESS,” “ESS, Inc.” or the “Company”) (NYSE:GWH), a leading manufacturer of long-duration energy storage systems (LDES) for commercial and utility-scale applications, today announced financial results for its fourth quarter and full year ended December 31, 2023.”

ESS Tech, Inc. received a nyse deficiency notice notice regarding minimum bid price (rules 802.01C).

“March 6, 2024, ESS Tech, Inc. (the “Company”) received a written notice (the “Notice”) from the New York Stock Exchange (“NYSE”) indicating that the Company did not satisfy the continued listing standard set forth in Section 802.01C of the NYSE’s Listed Company Manual (“Section 802.01C”), as the average closing price of the Company’s common stock was less than $1.00 per share over a consecutive 30 trading-day period. As of March 5, 2024, the 30 trading-day average closing share price of the security was $0.94. The Notice is a notice of deficiency, not delisting, and does not currently affect t”

ESS Tech, Inc. reported financial results for third quarter ended September 30, 2023.

“On November 7, 2023 , ESS Tech, Inc. (the “Company”) issued a press release announcing financial results for the quarter ended September 30, 2023.”

ESS Tech, Inc. entered into Master Supply Agreement with UOP valued at equipment supplied by the Company; initial performance warrant to issue up to 775,760 shares of Comm (effective 2023-09-21).

“the Company and UOP also entered into a Master Supply Agreement, pursuant to which UOP may purchase equipment supplied by the Company (the “Supply Agreement”).”

Michael R. Niggli resigned as Founding Chairman at ESS Tech, Inc..

“Michael R. Niggli resigned as Chairman of the Board and the Board appointed Harry Quarls as a member of the Board and as Chairman of the Board.”

Harry Quarls was appointed as Chairman of the Board at ESS Tech, Inc..

“the Board appointed Harry Quarls as a member of the Board and as Chairman of the Board.”

ESS Tech, Inc. reported the second quarter ended June 30, 2023 results: revenue $2.8 million.

“today announced financial results for its second quarter ended June 30, 2023. “I’m proud of the progress ESS made in the second quarter, recognizing record revenue of $2.8 million”

ESS Tech, Inc. reported the quarter ended June 30, 2023 results: revenue $2.8 million.

“as expressly set forth by specific reference in such a filing. --- EX-99.1 (EX-99.1) --- ESS Tech, Inc. Announces Second Quarter 2023 Financial Results Record Revenue of $2.8 Million Delivered Energy WarehousesTM to Four New Customers Announces Partnership with LEAG WILSONVILLE, Ore. – August 8, 2023 – ESS Tech, Inc . (“ESS,” “ESS, Inc.” or the “Company”) (”

ESS Tech, Inc.: Stockholders approved an amendment to the Company's Certificate of Incorporation to add officer exculpation provisions in accordance with recent changes to Delaware law (effective 2023-05-19).

“As disclosed in Item 5.07 below, at the Annual Meeting of the Company, the Company’s stockholders approved an amendment to Article IX of the Company’s Certificate of Incorporation (“Charter”), to provide for exculpation of certain officers to the fullest extent permitted by the Delaware General Corporation Law. The Board previously approved the amendment to the Charter subject to stockholder approval. The Charter amendment became effective upon the filing of the Certificate of Amendment to the Charter with the Secretary of State of the State of Delaware on May 19, 2023.”

ESS Tech, Inc. shareholders approved Ratification of Appointment of KPMG LLP as Independent Registered Public Accounting Firm for Fiscal Year Ending December 31, 2023 at the 2023-05-19 meeting.

“Proposal 3: Ratification of the Appointment of KPMG LLP as the Company’s Independent Registered Public Accounting Firm At the Annual Meeting, the Company’s stockholders ratified the appointment of KPMG LLP to serve as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2023. The table below sets forth the final voting results for this proposal: Votes For Votes Against Abstentions 107,964,372 12,911 19,804,719”

ESS Tech, Inc. shareholders approved Amendment to Certificate of Incorporation to Reflect Recently Adopted Delaware Law Provisions Regarding Officer Exculpation at the 2023-05-19 meeting.

“Proposal 2: Amendment to our Certificate of Incorporation to Reflect Recently Adopted Delaware Law Provisions Regarding Officer Exculpation At the Annual Meeting, the Company’s stockholders approved the amendment of its Charter to reflect recently adopted Delaware law provisions regarding officer exculpation. The table below sets forth the final voting results for this proposal: Votes For Votes Against Abstentions Broker Non-Votes 103,895,988 1,158,390 94,154 22,633,470”

ESS Tech, Inc. shareholders approved Election of Class II Directors at the 2023-05-19 meeting.

“Proposal 1: Election of Directors At the Annual Meeting, the Company’s stockholders elected two Class II directors to the Board to serve until the 2026 annual meeting of stockholders and until their respective successors have been duly elected and qualified. The table below sets forth the final voting results for each director nominee: Nominee Votes For Votes Withheld Broker Non-Votes Sandeep Nijhawan 104,646,990 501,542 22,633,470 Kyle Teamey 93,451,674 11,696,858 22,633,470”

Craig Evans resigned as President at ESS Tech, Inc..

“On May 17, 2023, in connection with the end of his term with the Company’s board of directors ("Board"), Craig Evans, Co-Founder and President of ESS Tech, Inc. (the “Company”) tendered his resignation as President to be effective as of the commencement of the 2023 annual meeting of stockholders (the "Annual Meeting") held on May 19, 2023.”

ESS Tech, Inc. reported financial results for first quarter of 2023 ended March 31, 2023.

“On May 9, 2023 , ESS Tech, Inc. (the “Company”) issued a press release announcing financial results for the quarter ended March 31, 2023.”

ESS Tech, Inc. reported financial results for fourth quarter and full year ended December 31, 2022.

“ESS Tech, Inc. issued a press release announcing financial results for the quarter and year ended December 31, 2022.”

Claudia Gast resigned as Director at ESS Tech, Inc..

“On November 25, 2022, Claudia Gast resigned as a member of the Board of Directors”

ESS Tech, Inc. reported third quarter of 2022 ended September 30, 2022 results: revenue $189 thousand.

“quarter, which should increase our annual production capacity to over 750 MWh. The fully-automated manufacturing line is expected to be operational before year end. • Recognized $189 thousand in revenue in the third quarter on one Energy WarehouseTM that was delivered to partner TerraSol Energies in the second quarter. This unit was deployed by Sycamore International,”

Anthony Rabb was appointed as Chief Financial Officer at ESS Tech, Inc..

“On November 3, 2022, the Company announced the appointment of Anthony Rabb as Chief Financial Officer of the Company, effective November 4, 2022”

Amir Moftakhar resigned as Chief Financial Officer at ESS Tech, Inc..

“On November 3, 2022, Amir Moftakhar, Chief Financial Officer of the Company tendered his resignation as Chief Financial Officer to be effective as of November 4, 2022.”

Amir Moftakhar changed role as principal accounting officer (interim) at ESS Tech, Inc..

“In connection with Mr. Bodner’s resignation, Amir Moftakhar, the Company’s Chief Financial Officer, will assume the role and responsibilities of principal accounting officer on an interim basis as of the effective date of Mr. Bodner’s resignation.”

Jeff Bodner resigned as Chief Accounting Officer at ESS Tech, Inc..

“On August 24, 2022, Jeff Bodner, Chief Accounting Officer of ESS Tech, Inc. (the “Company”) tendered his resignation from the Company, to be effective as of September 12, 2022.”

Claudia Gast was appointed as Director at ESS Tech, Inc..

“On February 16, 2022, the Board appointed Claudia Gast as a director of the Company, effective February 17, 2022.”

Shirley Speakman resigned as Director at ESS Tech, Inc..

“On February 14, 2022, Shirley Speakman notified ESS Tech, Inc. (the “Company”) that, effective February 17, 2022, she is resigning from the Company’s Board of Directors (the “Board”) to focus her time on early stage company investing.”

Alexi Wellman was appointed as director at ESS Tech, Inc..

“the board of directors of New ESS (the “ Board ”) increased the size of the Board from eight to nine directors and appointed Alexi Wellman as an independent director, effective immediately.”