S-3 S-3 EX-FILING FEES 0001819438 ESS Tech, Inc. N/A N/A 0.0001381 0.0001381 0.0001381 0.0001381 0.0001381 0.0001381 0.0001381 0.0001381 0001819438 2025-11-13 2025-11-13 0001819438 1 2025-11-13 2025-11-13 0001819438 2 2025-11-13 2025-11-13 0001819438 3 2025-11-13 2025-11-13 0001819438 4 2025-11-13 2025-11-13 0001819438 5 2025-11-13 2025-11-13 0001819438 6 2025-11-13 2025-11-13 0001819438 7 2025-11-13 2025-11-13 0001819438 8 2025-11-13 2025-11-13 0001819438 9 2025-11-13 2025-11-13 0001819438 10 2025-11-13 2025-11-13 0001819438 11 2025-11-13 2025-11-13 iso4217:USD xbrli:pure xbrli:shares

Calculation of Filing Fee Tables

S-3

ESS Tech, Inc.

Table 1: Newly Registered and Carry Forward Securities ☐Not Applicable

Security Type

Security Class Title

Fee Calculation or Carry Forward Rule

Amount Registered

Proposed Maximum Offering Price Per Unit

Maximum Aggregate Offering Price

Fee Rate

Amount of Registration Fee

Carry Forward Form Type

Carry Forward File Number

Carry Forward Initial Effective Date

Filing Fee Previously Paid in Connection with Unsold Securities to be Carried Forward

Newly Registered Securities
Equity Common Stock, par value $0.0001 per share 457(o)
Equity Preferred Stock, par value $0.0001 per share 457(o)
Debt Debt Securities 457(o)
Equity Depositary Shares 457(o)
Equity Warrants 457(o)
Other Subscription Rights 457(o)
Other Purchase Contracts 457(o)
Other Units 457(o)
Fees to be Paid 1 Unallocated (Universal) Shelf 457(o) $ 300,000,000.00 0.0001381 $ 41,430.00
Fees to be Paid 2 Equity Common Stock, par value $0.0001 per share Other 129,312 $ 4.16 $ 537,937.92 0.0001381 $ 74.29
Fees to be Paid 3 Equity Common Stock, par value $0.0001 per share 457(o) 1,052,104 $ 4.16 $ 4,376,752.64 0.0001381 $ 604.43
Fees Previously Paid
Carry Forward Securities
Carry Forward Securities

Total Offering Amounts:

$ 304,914,690.56

$ 42,108.72

Total Fees Previously Paid:

$ 0.00

Total Fee Offsets:

$ 0.00

Net Fee Due:

$ 42,108.72

Offering Note

1

An indeterminate aggregate initial offering price and number of securities of each identified class is being registered as may from time to time be offered, issued or sold at indeterminate prices. In addition, an indeterminate number of securities that may be issued upon exercise, settlement, conversion or exchange of any offered securities, or pursuant to anti-dilution adjustments, is being registered. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities.

2

Represents shares that may be sold by the selling stockholders identified in the registration statement. Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(c) under the Securities Act based on the average of the high and low prices of the registrant's common stock on the New York Stock Exchange on November 7, 2025.

3

See Note 2a.

Table 2: Fee Offset Claims and Sources ☑Not Applicable
Registrant or Filer Name Form or Filing Type File Number Initial Filing Date Filing Date Fee Offset Claimed Security Type Associated with Fee Offset Claimed Security Title Associated with Fee Offset Claimed Unsold Securities Associated with Fee Offset Claimed Unsold Aggregate Offering Amount Associated with Fee Offset Claimed Fee Paid with Fee Offset Source
Rules 457(b) and 0-11(a)(2)
Fee Offset Claims N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Fee Offset Sources N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Rule 457(p)
Fee Offset Claims N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Fee Offset Sources N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
Table 3: Combined Prospectuses ☑Not Applicable

Security Type

Security Class Title

Amount of Securities Previously Registered

Maximum Aggregate Offering Price of Securities Previously Registered

Form Type

File Number

Initial Effective Date

N/A N/A N/A N/A N/A N/A N/A N/A