{"transactions":[{"id":677691,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-08-24T20:10:01.000Z","date":"2026-08-21","kind":"sale","planned":false,"acquired":false,"shares":3927,"price":0.4022,"value":1579.4394,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock."}],"balance_after":156830,"source":{"system":"sec-edgar","filing":"0002083724-26-000005","document":"form4-08242026_080856.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000208372426000005/form4-08242026_080856.xml","form_type":"4"}},{"id":764182,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-05-26T22:59:01.000Z","date":"2026-05-22","kind":"sale","planned":false,"acquired":false,"shares":1922,"price":0.9346,"value":1796.3012,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in sold Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.92  to $0.95, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock."}],"balance_after":160757,"source":{"system":"sec-edgar","filing":"0002083724-26-000004","document":"form4-05262026_100556.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000208372426000004/form4-05262026_100556.xml","form_type":"4"}},{"id":764181,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-05-26T22:59:01.000Z","date":"2026-05-21","kind":"sale","planned":false,"acquired":false,"shares":1735,"price":0.9181,"value":1592.9035,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units (\"RSUs\")."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in sold Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.9024  to $0.971, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock."}],"balance_after":162679,"source":{"system":"sec-edgar","filing":"0002083724-26-000004","document":"form4-05262026_100556.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000208372426000004/form4-05262026_100556.xml","form_type":"4"}},{"id":880079,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-27T02:45:53.000Z","date":"2026-02-20","kind":"sale","planned":false,"acquired":false,"shares":741,"price":1.54,"value":1141.14,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"These shares were sold to cover tax withholding obligations in connection with the vesting of restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock."}],"balance_after":164414,"source":{"system":"sec-edgar","filing":"0002083724-26-000003","document":"form4-02272026_020250.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000208372426000003/form4-02272026_020250.xml","form_type":"4"}},{"id":880078,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (right to buy)","published_at":"2026-02-27T02:43:13.000Z","date":"2026-02-13","kind":"grant","planned":false,"acquired":true,"shares":137500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"1/16th of the shares subject to the option shall vest on May 20, 2026 and 1/16th of the shares subject to the option shall vest quarterly thereafter, subject to the Reporting Person remaining a Service Provider to the issuer through each such vest date."}],"balance_after":137500,"derivative":{"exercise_price":1.44,"expiration_date":"2036-02-13","underlying":"Common Stock","underlying_shares":137500},"source":{"system":"sec-edgar","filing":"0002083724-26-000002","document":"form4-02272026_020210.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000208372426000002/form4-02272026_020210.xml","form_type":"4"}},{"id":880077,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-02-27T02:43:13.000Z","date":"2026-02-13","kind":"grant","planned":false,"acquired":true,"shares":137500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported shares are represented by restricted stock units (\"RSUs\"), which vest as to 1/16th of the RSUs on May 20, 2026 and 1/16th of the RSUs shall vest quarterly thereafter, subject to the Reporting Person remaining a Service Provider to the Issuer through each such vest date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock."}],"balance_after":165155,"source":{"system":"sec-edgar","filing":"0002083724-26-000002","document":"form4-02272026_020210.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000208372426000002/form4-02272026_020210.xml","form_type":"4"}},{"id":991619,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CFO"}}],"security":"Common Stock","published_at":"2025-11-21T23:18:33.000Z","date":"2025-11-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":1299,"price":2.4,"value":3117.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported shares were withheld by the Issuer upon vesting of RSUs to satisfy tax withholding obligations."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock."}],"balance_after":27655,"source":{"system":"sec-edgar","filing":"0002083724-25-000002","document":"wk-form4_1763767111.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000208372425000002/wk-form4_1763767111.xml","form_type":"4"}},{"id":1053045,"issuer":{"id":7856,"kind":"organization","name":"ESS Tech, Inc."},"owners":[{"id":20469,"kind":"person","name":"Suhadolnik Kate Eileen","position":1,"cik":"0002083724","reported_name":"Suhadolnik Kate Eileen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Interim CFO"}}],"security":"Common Stock","published_at":"2025-08-29T20:04:39.000Z","date":"2025-08-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":1232,"price":1.61,"value":1983.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported shares were withheld by the Issuer upon vesting of RSUs to satisfy tax withholding obligations."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"A portion of these securities are RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Common Stock."}],"balance_after":28954,"source":{"system":"sec-edgar","filing":"0001628280-25-041397","document":"wk-form4_1756497875.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2083724/000162828025041397/wk-form4_1756497875.xml","form_type":"4"}}]}