# EDGAR Filing Document

**Accession Number:** 0001819438
**File Stem:** 0001819438-26-000039
**Filing Date:** 2026-5
**Character Count:** 8285
**Document Hash:** 5a518d16148986d8136575942fe321a3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001819438-26-000039.hdr.sgml**: 20260529

**ACCESSION NUMBER**: 0001819438-26-000039

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260529

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**FILED AS OF DATE**: 20260529

**DATE AS OF CHANGE**: 20260529

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ESS Tech, Inc.
- **CENTRAL INDEX KEY:** 0001819438
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 981550150
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39525
- **FILM NUMBER:** 261046041

**BUSINESS ADDRESS:**
- **STREET 1:** 26440 SW PARKWAY AVE.
- **STREET 2:** BLDG. 83
- **CITY:** WILSONVILLE
- **STATE:** OR
- **ZIP:** 97070
- **BUSINESS PHONE:** (855) 423-9920

**MAIL ADDRESS:**
- **STREET 1:** 26440 SW PARKWAY AVE.
- **STREET 2:** BLDG. 83
- **CITY:** WILSONVILLE
- **STATE:** OR
- **ZIP:** 97070

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ACON S2 Acquisition Corp.
- **DATE OF NAME CHANGE:** 20200728

?xml version='1.0' encoding='ASCII'? wk-20260529

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d)**

**of the Securities Exchange Act of 1934**

**Date of report (Date of earliest event reported): May 29, 2026**

**ESS TECH, INC.**

**(Exact Name of Registrant as Specified in Charter)**

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| | | |
|:---|:---|:---|
| **Delaware** | **001-39525** | **98-1550150** |
| **(State or other jurisdiction**<br>**of incorporation)** | **(Commission**<br>**File Number)** | **(I.R.S. Employer**<br>**Identification Number)** |

---

---

| | |
|:---|:---|
| **26440 SW Parkway Ave., Bldg. 83**<br>**Wilsonville, Oregon** | **97070** |
| **(Address of principal executive offices)** | **(Zip code)** |

---

**(855) 423-9920**

**(Registrant's telephone number, including area code)**

**Not Applicable**

**(Former name or former address, if changed since last report)**

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the Registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br>**Symbol(s)** | **Name of each exchange**<br>**on which registered** |
| **Common Stock, $0.0001 par value per share** | **GWH** | **The New York Stock Exchange** |
| **Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $172.50** | **GWH.W** | **The New York Stock Exchange** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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**Item 5.07 Submission of Matters to a Vote of Security Holders.** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.On May 29, 2026, ESS Tech, Inc. (the "Company") held its 2026 Annual Meeting of Stockholders (the "Annual Meeting") exclusively online via live webcast. Of the 27,922,991 shares of common stock issued and outstanding as of the close of business on April 6, 2026, the record date for the determination of stockholders entitled to notice of, and to vote at, the Annual Meeting, 15,682,283 shares of common stock were present or represented by proxy at the Annual Meeting. At the Annual Meeting, the Company's stockholders (i) elected two Class II directors to the Company's board of directors (the "Board") to serve until the Company's 2029 annual meeting of stockholders, (ii) ratified the appointment of KPMG LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026, (iii) approved, on an advisory basis, the compensation of the Company's named executive officers, and (iv) 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, commonly known as "say-on-pay." The proposals are described in detail in the Company's definitive proxy statement on Schedule 14A (the "Proxy Statement"), filed with the Securities and Exchange Commission on April 15, 2026.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.The final voting results for each proposal are set forth below.

*Proposal 1: Election of Director*

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. The table below sets forth the final voting results for the director nominees:

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| | | | |
|:---|:---|:---|:---|
| **Nominees** | **Votes For** | **Votes Withheld** | **Broker Non-Votes** |
| &nbsp;&nbsp;Sandeep Nijhawan | 5,354,144 | 1,723,434 | 8,604,705 |
| &nbsp;&nbsp;Harry Quarls | 6,863,675 | 213,903 | 8,604,705 |

---

*Proposal 2: 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, 2026. The table below sets forth the final voting results for this proposal:

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| | | | |
|:---|:---|:---|:---|
| **Votes For** | **Votes Against** | **Abstentions** | **Broker Non-Votes** |
| 15,155,588 | 495,296 | 31,399 | 0 |

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*Proposal 3: Advisory Vote on the Compensation of the Company's Named Executive Officers*

At the Annual Meeting, the Company's stockholders approved, on an advisory basis, the compensation of the Company's named executive officers. The table below sets forth the final voting results for this proposal:

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| | | | |
|:---|:---|:---|:---|
| **Votes For** | **Votes Against** | **Abstentions** | **Broker Non-Votes** |
| 6,877,414 | 126,602 | 73,562 | 8,604,705 |

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*Proposal 4: Advisory Vote on the Frequency of Future Advisory Votes on the Compensation of the Company's Named Executive Officers*

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. Based on the recommendation of the Board in the Proxy Statement and the voting results for Proposal No. 4, the Company will include a say-on-pay proposal in its proxy statement every year until the next required advisory vote on the frequency of a say-on-pay vote. The table below sets forth the final voting results for this proposal:

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| | | | | |
|:---|:---|:---|:---|:---|
| **1 Year** | **2 Years** | **3 Years** | **Abstentions** | **Broker Non-Votes** |
| 6,871,222 | 92,412 | 88,562 | 25,382 | 8,604,705 |

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**SIGNATURE** 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.

Dated: May 29, 2026

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| | |
|:---|:---|
| **ESS TECH, INC.** | **ESS TECH, INC.** |
| By: | /s/ Kate Suhadolnik |
| Name: | Kate Suhadolnik |
| Title: | Chief Financial Officer |

---