{"transactions":[{"id":1193322,"issuer":{"id":277,"kind":"organization","name":"Bridger Aerospace Group Holdings, Inc.","symbol":"BAER"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-03-24T21:23:45.000Z","date":"2025-03-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":17672,"price":1.53,"value":27038.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares withheld by the Issuer in connection with the reporting person's net share settlement to satisfy tax liability upon the vesting of 50,000 shares of restricted stock units. No shares were sold by the reporting person to satisfy this tax liability."},{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld by the Issuer in connection with the reporting person's net share settlement to satisfy tax liability upon the vesting of 50,000 shares of restricted stock units. No shares were sold by the reporting person to satisfy this tax liability."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Represents the closing price per share as of the transaction date. The Reporting Person has provided to the Company and undertakes to provide to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares withheld."}],"balance_after":451791,"source":{"system":"sec-edgar","filing":"0001683168-25-001838","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1409319/000168316825001838/ownership.xml","form_type":"4"}},{"id":1403448,"issuer":{"id":277,"kind":"organization","name":"Bridger Aerospace Group Holdings, Inc.","symbol":"BAER"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-09-18T19:16:53.000Z","date":"2024-09-18","kind":"sale","planned":false,"acquired":false,"shares":8808,"price":2.69,"value":23693.52,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"hese shares were sold to pay for tax obligations incurred by the Reporting Person as a result of the Reporting Peron's federal tax withholding obligations in connection with the settlement of previously-granted and vested restricted stock units"},{"field":"shares","element":"transactionShares","label":"F1","text":"hese shares were sold to pay for tax obligations incurred by the Reporting Person as a result of the Reporting Peron's federal tax withholding obligations in connection with the settlement of previously-granted and vested restricted stock units"},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $2.56 to $2.80. The Reporting Person has provided to the Company, and undertakes to provide to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range."}],"balance_after":469463,"source":{"system":"sec-edgar","filing":"0001683168-24-006505","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1409319/000168316824006505/ownership.xml","form_type":"4"}},{"id":1403447,"issuer":{"id":277,"kind":"organization","name":"Bridger Aerospace Group Holdings, Inc.","symbol":"BAER"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-09-18T19:16:53.000Z","date":"2024-09-17","kind":"sale","planned":false,"acquired":false,"shares":2998,"price":2.64,"value":7914.72,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"hese shares were sold to pay for tax obligations incurred by the Reporting Person as a result of the Reporting Peron's federal tax withholding obligations in connection with the settlement of previously-granted and vested restricted stock units"},{"field":"shares","element":"transactionShares","label":"F1","text":"hese shares were sold to pay for tax obligations incurred by the Reporting Person as a result of the Reporting Peron's federal tax withholding obligations in connection with the settlement of previously-granted and vested restricted stock units"},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $2.53 to $2.72. The Reporting Person has provided to the Company, and undertakes to provide to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range."}],"balance_after":478271,"source":{"system":"sec-edgar","filing":"0001683168-24-006505","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1409319/000168316824006505/ownership.xml","form_type":"4"}},{"id":1403446,"issuer":{"id":277,"kind":"organization","name":"Bridger Aerospace Group Holdings, Inc.","symbol":"BAER"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-09-18T19:16:53.000Z","date":"2024-09-16","kind":"sale","planned":false,"acquired":false,"shares":18731,"price":2.59,"value":48513.29,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"hese shares were sold to pay for tax obligations incurred by the Reporting Person as a result of the Reporting Peron's federal tax withholding obligations in connection with the settlement of previously-granted and vested restricted stock units"},{"field":"shares","element":"transactionShares","label":"F1","text":"hese shares were sold to pay for tax obligations incurred by the Reporting Person as a result of the Reporting Peron's federal tax withholding obligations in connection with the settlement of previously-granted and vested restricted stock units"},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Represents a weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $2.41 to $2.81. The Reporting Person has provided to the Company, and undertakes to provide to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range."}],"balance_after":481269,"source":{"system":"sec-edgar","filing":"0001683168-24-006505","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1409319/000168316824006505/ownership.xml","form_type":"4"}},{"id":2285478,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":9322,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."}],"balance_after":0,"derivative":{"expiration_date":"2024-12-31","underlying":"Common Stock","underlying_shares":9322},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285477,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":7601,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each performance stock unit (\"PSU\") became fully vested and was cancelled and entitled the holder of such PSU to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer Common Stock equal to the greater of (i) the target number of shares of Issuer Common Stock with respect to such PSU as defined and set forth in the applicable award agreement and (ii) the number of shares of Issuer Common Stock determined based upon the actual level of achievement through the latest practicable date prior to the effective time of the merger multiplied by (b) the Merger Consideration."}],"balance_after":0,"derivative":{"expiration_date":"2022-12-31","underlying":"Common Stock","underlying_shares":7601},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285476,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":31600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":35.3,"exercise_date":"2022-01-03","expiration_date":"2031-01-03","underlying":"Common Stock","underlying_shares":31600},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285475,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":9900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":57.04,"exercise_date":"2021-01-01","expiration_date":"2030-01-01","underlying":"Common Stock","underlying_shares":9900},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285474,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":6100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":63.85,"exercise_date":"2020-01-01","expiration_date":"2029-01-01","underlying":"Common Stock","underlying_shares":6100},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285473,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":6900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":51,"exercise_date":"2019-01-01","expiration_date":"2028-01-01","underlying":"Common Stock","underlying_shares":6900},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285472,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":49.15,"exercise_date":"2018-01-01","expiration_date":"2027-01-01","underlying":"Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285471,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":2300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":35.05,"exercise_date":"2017-01-03","expiration_date":"2026-01-03","underlying":"Common Stock","underlying_shares":2300},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285470,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":8500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"kind","element":"transactionCoding","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the Merger Agreement, at the effective time of the merger, each outstanding stock option of the Issuer  became fully vested and was cancelled and entitled the holder of such option to receive in exchange therefor an amount in cash equal to (a) the number of shares of Issuer common stock subject to the option multiplied by (b) the excess of the Merger Consideration over the per-share exercise price of such option."}],"balance_after":0,"derivative":{"exercise_price":49.97,"exercise_date":"2016-03-09","expiration_date":"2025-03-09","underlying":"Common Stock","underlying_shares":8500},"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2285469,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2022-05-03T16:28:16.000Z","date":"2022-05-02","kind":"disposition_to_issuer","acquired":false,"shares":45547,"price":48,"value":2186256.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Pursuant to the Agreement and Plan of Merger (the \"Merger Agreement\"), entered into on February 8, 2022, by and among the Issuer, Republic Services, Inc. (\"Parent\") and Bronco Acquisition Corp. (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on February 10, 2022). At the effective time of the merger, each Issuer share of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $48.00 per share in cash without interest (\"Merger Consideration\")."},{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the Agreement and Plan of Merger (the \"Merger Agreement\"), entered into on February 8, 2022, by and among the Issuer, Republic Services, Inc. (\"Parent\") and Bronco Acquisition Corp. (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on February 10, 2022). At the effective time of the merger, each Issuer share of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $48.00 per share in cash without interest (\"Merger Consideration\")."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-22-010677","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922010677/rdgdoc.xml","form_type":"4"}},{"id":2446157,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2022-01-05T16:30:26.000Z","date":"2022-01-03","kind":"grant","acquired":true,"shares":9322,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each Performance Stock Unit (\"PSU\") represents a contingent right to receive one share of the Company's common stock (\"Target PSUs\"). The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. Based on actual results, each Executive will be eligible to receive 0% to 200% of the Target PSUs. The PSUs will be earned over a 3-year period beginning January 1, 2022, cliff vesting on December 31, 2024. After the payout is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2022 to December 31, 2024 relative to the percentage change in the price of the common stock of certain companies in the environmental and facilities industry."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each Performance Stock Unit (\"PSU\") represents a contingent right to receive one share of the Company's common stock (\"Target PSUs\"). The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. Based on actual results, each Executive will be eligible to receive 0% to 200% of the Target PSUs. The PSUs will be earned over a 3-year period beginning January 1, 2022, cliff vesting on December 31, 2024. After the payout is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2022 to December 31, 2024 relative to the percentage change in the price of the common stock of certain companies in the environmental and facilities industry."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Each Performance Stock Unit (\"PSU\") represents a contingent right to receive one share of the Company's common stock (\"Target PSUs\"). The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. Based on actual results, each Executive will be eligible to receive 0% to 200% of the Target PSUs. The PSUs will be earned over a 3-year period beginning January 1, 2022, cliff vesting on December 31, 2024. After the payout is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2022 to December 31, 2024 relative to the percentage change in the price of the common stock of certain companies in the environmental and facilities industry."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Each Performance Stock Unit (\"PSU\") represents a contingent right to receive one share of the Company's common stock (\"Target PSUs\"). The number of PSU's to which an Executive will be entitled will be determined based on a 1-year measurement period from January 1, 2022 to December 31, 2022 based on achievement of established targets with respect to the Company's revenue growth and net debt leverage, each weighted at 50% of the Target PSUs. Based on actual results, each Executive will be eligible to receive 0% to 200% of the Target PSUs. The PSUs will be earned over a 3-year period beginning January 1, 2022, cliff vesting on December 31, 2024. After the payout is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2022 to December 31, 2024 relative to the percentage change in the price of the common stock of certain companies in the environmental and facilities industry."}],"balance_after":9322,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":9322},"source":{"system":"sec-edgar","filing":"0001437749-22-000419","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922000419/rdgdoc.xml","form_type":"4"}},{"id":2446156,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2022-01-05T16:30:26.000Z","date":"2022-01-03","kind":"grant","acquired":true,"shares":9322,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock vesting annually and ratably over three years from the date of issuance."}],"balance_after":45547,"source":{"system":"sec-edgar","filing":"0001437749-22-000419","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774922000419/rdgdoc.xml","form_type":"4"}},{"id":2908840,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2021-01-13T15:42:52.000Z","date":"2021-01-12","kind":"tax_withholding","acquired":false,"shares":2281,"price":36.33,"value":82868.73,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F1","text":"Date on which the number of shares to be withheld was determined upon election of the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Closing price of US Ecology, Inc. common stock on December 31, 2020; upon which the number of shares withheld was determined."}],"balance_after":36225,"source":{"system":"sec-edgar","filing":"0001437749-21-000646","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774921000646/rdgdoc.xml","form_type":"4"}},{"id":2917665,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2021-01-06T15:53:29.000Z","date":"2021-01-04","kind":"grant","acquired":true,"shares":31600,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Issued pursuant to the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan, vesting annually and ratably over three years from the date of issuance."}],"balance_after":31600,"derivative":{"exercise_price":35.3,"exercise_date":"2022-01-03","expiration_date":"2031-01-03","underlying":"Common Stock","underlying_shares":31600},"source":{"system":"sec-edgar","filing":"0001437749-21-000251","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774921000251/rdgdoc.xml","form_type":"4"}},{"id":2917664,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2021-01-06T15:53:29.000Z","date":"2021-01-04","kind":"grant","acquired":true,"shares":8900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock issued pursuant to the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan, vesting annually and ratably over three years from the date of issuance."}],"balance_after":38506,"source":{"system":"sec-edgar","filing":"0001437749-21-000251","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774921000251/rdgdoc.xml","form_type":"4"}},{"id":3079849,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2020-07-20T15:52:01.000Z","date":"2020-07-16","kind":"grant","acquired":true,"shares":7601,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Grant of Performance Stock Units. Each Performance Stock Unit represents a contingent right to receive one share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the Performance Stock Units. The actual number of shares to be delivered in settlement of the Performance Stock Units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the two and one-half year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the Performance Stock Units. The Performance Stock Units will settle as soon as practicable after December 31, 2022."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Grant of Performance Stock Units. Each Performance Stock Unit represents a contingent right to receive one share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the Performance Stock Units. The actual number of shares to be delivered in settlement of the Performance Stock Units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the two and one-half year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the Performance Stock Units. The Performance Stock Units will settle as soon as practicable after December 31, 2022."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Grant of Performance Stock Units. Each Performance Stock Unit represents a contingent right to receive one share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the Performance Stock Units. The actual number of shares to be delivered in settlement of the Performance Stock Units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the two and one-half year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the Performance Stock Units. The Performance Stock Units will settle as soon as practicable after December 31, 2022."}],"balance_after":7601,"derivative":{"exercise_price":0,"expiration_date":"2022-12-31","underlying":"Common Stock","underlying_shares":7601},"source":{"system":"sec-edgar","filing":"0001437749-20-015409","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920015409/rdgdoc.xml","form_type":"4"}},{"id":3312102,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2020-01-14T16:55:20.000Z","date":"2020-01-10","kind":"exercise","acquired":false,"shares":1182,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."},{"field":"deemedExecutionDate","element":"deemedExecutionDate","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."},{"field":"shares","element":"transactionShares","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."}],"balance_after":0,"derivative":{"exercise_price":0,"expiration_date":"2019-12-31","underlying":"Common Stock","underlying_shares":1182},"source":{"system":"sec-edgar","filing":"0001437749-20-000634","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920000634/rdgdoc.xml","form_type":"4"}},{"id":3312101,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2020-01-14T16:55:20.000Z","date":"2020-01-10","kind":"tax_withholding","acquired":false,"shares":3529,"price":57.49,"value":202882.21,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F2","text":"Date on which the number of shares to be withheld was determined upon election of the reporting person."},{"field":"shares","element":"transactionShares","label":"F3","text":"Number of shares withheld was determined based on the closing price of US Ecology, Inc. common stock on December 31, 2019 and January 10, 2020 . Price indicated is a weighted average of the closing price of stock; 2,878 shares at $57.91 per share and 651 shares at $55.65 per share."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Number of shares withheld was determined based on the closing price of US Ecology, Inc. common stock on December 31, 2019 and January 10, 2020 . Price indicated is a weighted average of the closing price of stock; 2,878 shares at $57.91 per share and 651 shares at $55.65 per share."}],"balance_after":29606,"source":{"system":"sec-edgar","filing":"0001437749-20-000634","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920000634/rdgdoc.xml","form_type":"4"}},{"id":3312100,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2020-01-14T16:55:20.000Z","date":"2020-01-10","kind":"exercise","acquired":true,"shares":1182,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2019 (as calculated on January 10, 2020) based on US Ecology Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities industry (weighted at 50%). The target number of shares available was 2,000 and the maximum number of shares available was 4,000 or 200% of target."}],"balance_after":33135,"source":{"system":"sec-edgar","filing":"0001437749-20-000634","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920000634/rdgdoc.xml","form_type":"4"}},{"id":3325394,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2020-01-03T16:45:33.000Z","date":"2020-01-02","kind":"grant","acquired":true,"shares":9900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Issued pursuant to the Amended and Restated US Ecology, Inc. Omnibus Plan, vesting annually and ratably over three years from the date of issuance."}],"balance_after":9900,"derivative":{"exercise_price":57.04,"exercise_date":"2021-01-01","expiration_date":"2030-01-01","underlying":"Common Stock","underlying_shares":9900},"source":{"system":"sec-edgar","filing":"0001437749-20-000172","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920000172/rdgdoc.xml","form_type":"4"}},{"id":3325393,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2020-01-03T16:45:33.000Z","date":"2020-01-02","kind":"grant","acquired":true,"shares":4400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock issued pursuant to the Amended and Restated US Ecology, Inc. Omnibus Plan, vesting annually and ratably over three years from the date of issuance."}],"balance_after":31953,"source":{"system":"sec-edgar","filing":"0001437749-20-000172","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774920000172/rdgdoc.xml","form_type":"4"}},{"id":3384184,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":2847,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":2847,"derivative":{"exercise_price":0,"expiration_date":"2021-12-31","underlying":"Common Stock","underlying_shares":2847},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384183,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":2400,"derivative":{"exercise_price":0,"expiration_date":"2020-12-31","underlying":"Common Stock","underlying_shares":2400},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384182,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":2000,"derivative":{"exercise_price":0,"expiration_date":"2019-12-31","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384181,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":6100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":6100,"derivative":{"exercise_price":63.85,"exercise_date":"2020-01-01","expiration_date":"2029-01-01","underlying":"Common Stock","underlying_shares":6100},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384180,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":6900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":6900,"derivative":{"exercise_price":51,"exercise_date":"2019-01-01","expiration_date":"2028-01-01","underlying":"Common Stock","underlying_shares":6900},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384179,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":6000,"derivative":{"exercise_price":49.15,"exercise_date":"2018-01-02","expiration_date":"2027-01-01","underlying":"Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384178,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":2300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These Options are fully vested and exercisable."}],"balance_after":2300,"derivative":{"exercise_price":35.05,"exercise_date":"2017-01-04","expiration_date":"2026-01-03","underlying":"Common Stock","underlying_shares":2300},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384177,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":8500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These Options are fully vested and exercisable."}],"balance_after":8500,"derivative":{"exercise_price":49.97,"exercise_date":"2016-03-10","expiration_date":"2025-03-09","underlying":"Common Stock","underlying_shares":8500},"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384176,"issuer":{"id":127674,"kind":"organization","name":"US Ecology, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2019-11-01T13:02:40.000Z","date":"2019-11-01","kind":"grant","acquired":true,"shares":27553,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Acquired pursuant to that certain Agreement and Plan of Merger, dated as of June 23, 2019 (\"Merger Agreement\"), by and among US Ecology Holdings, Inc. (f/k/a US Ecology, Inc.) (\"Parent\"), NRC Group Holdings Corp., US Ecology, Inc. (f/k/a US Ecology Parent, Inc.) (\"Holdco\"), ECOL Merger Sub, Inc. (\"ECOL Merger Sub\") and Rooster Merger Sub, Inc., in a merger transaction in which ECOL Merger Sub merged with and into Parent, and each issued and outstanding share of Parent's common stock was converted into the right to receive, and became exchangeable for, one share of common stock, par value $0.01 of Holdco."}],"balance_after":27553,"source":{"system":"sec-edgar","filing":"0001437749-19-021248","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1783400/000143774919021248/rdgdoc.xml","form_type":"4"}},{"id":3384212,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":2847,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Parent's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Parent's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":0,"derivative":{"exercise_price":0,"expiration_date":"2021-12-31","underlying":"Common Stock","underlying_shares":2847},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384211,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":0,"derivative":{"exercise_price":0,"expiration_date":"2020-12-31","underlying":"Common Stock","underlying_shares":2400},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384210,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each PSU represents a contingent right to receive one share of Parent common stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on Parent's total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the PSUs. If earned, PSUs will vest ratably on the anniversary of the date of original issuance for a period of three years. The PSUs will settle as soon as practicable after the expiration date."}],"balance_after":0,"derivative":{"expiration_date":"2019-12-31","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384209,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":6100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":0,"derivative":{"exercise_price":63.85,"exercise_date":"2020-01-01","expiration_date":"2029-01-01","underlying":"Common Stock","underlying_shares":6100},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384208,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":6900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":0,"derivative":{"exercise_price":51,"exercise_date":"2019-01-01","expiration_date":"2028-01-01","underlying":"Common Stock","underlying_shares":6900},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384207,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Options vest ratably on the anniversary of the date of original issuance for a period of three years. Upon vesting, the reporting person will receive a number of shares of common stock equal to the number of Options that have vested."}],"balance_after":0,"derivative":{"exercise_price":49.15,"exercise_date":"2018-01-02","expiration_date":"2027-01-01","underlying":"Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384206,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":2300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These Options are fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":35.05,"exercise_date":"2017-01-04","expiration_date":"2026-01-03","underlying":"Common Stock","underlying_shares":2300},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384205,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Stock Options","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":8500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"shares","element":"transactionShares","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"All outstanding derivative securities of Parent, which include Options and Performance Stock Units (\"PSUs\"), were assumed by Holdco pursuant to the Merger Agreement and were converted into an equivalent number of Options and PSUs, respectively, of Holdco at an equivalent exercise price and under the same terms and conditions as the original award."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These Options are fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":49.97,"exercise_date":"2016-03-10","expiration_date":"2025-03-09","underlying":"Common Stock","underlying_shares":8500},"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3384204,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2019-11-01T11:55:43.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":false,"shares":27553,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Disposed pursuant to that certain Agreement and Plan of Merger, dated as of June 23, 2019 (\"Merger Agreement\"), by and among US Ecology Holdings, Inc. (f/k/a US Ecology, Inc.) (\"Parent\"), NRC Group Holdings Corp., US Ecology, Inc. (f/k/a US Ecology Parent, Inc.) (\"Holdco\"), ECOL Merger Sub, Inc. (\"ECOL Merger Sub\") and Rooster Merger Sub, Inc., in a merger transaction in which ECOL Merger Sub merged with and into Parent, and each issued and outstanding share of Parent's common stock was converted into the right to receive, and became exchangeable for, one share of common stock, par value $0.01 of Holdco."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001437749-19-021203","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919021203/rdgdoc.xml","form_type":"4"}},{"id":3616742,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2019-03-05T16:01:58.000Z","date":"2019-03-01","kind":"grant","acquired":true,"shares":2847,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Company's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. The PSUs will settle as soon as practicable after December 31, 2021."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Company's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. The PSUs will settle as soon as practicable after December 31, 2021."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Each performance stock unit (\"PSU\") represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the PSUs. The actual number of shares to be delivered in settlement of the PSUs earned during the performance period will be based on achievement of established targets with respect to the Company's Adjusted Earnings Per Share and Return on Invested Capital, each weighted at 50% of the target PSUs. After the payout under the PSUs is determined, the number of shares to be provided is subject to modification based on the percentage change in the price of the Company's common stock from January 1, 2019 to December 31, 2021, relative to the percentage change in the price of the common stock of certain peer group companies. The PSUs will settle as soon as practicable after December 31, 2021."}],"balance_after":2847,"derivative":{"expiration_date":"2021-12-31","underlying":"Common Stock","underlying_shares":2847},"source":{"system":"sec-edgar","filing":"0001437749-19-004058","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919004058/rdgdoc.xml","form_type":"4"}},{"id":3699693,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Unit","published_at":"2019-01-09T16:20:44.000Z","date":"2019-01-07","kind":"exercise","acquired":false,"shares":3426,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2018 (as calculated on January 7, 2019) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 2,400 and the maximum number of shares available was 4,800 or 200% of target."},{"field":"deemedExecutionDate","element":"deemedExecutionDate","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2018 (as calculated on January 7, 2019) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 2,400 and the maximum number of shares available was 4,800 or 200% of target."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2018 (as calculated on January 7, 2019) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 2,400 and the maximum number of shares available was 4,800 or 200% of target."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2018 (as calculated on January 7, 2019) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 2,400 and the maximum number of shares available was 4,800 or 200% of target."}],"balance_after":0,"derivative":{"expiration_date":"2018-12-31","underlying":"Common Stock","underlying_shares":3426},"source":{"system":"sec-edgar","filing":"0001437749-19-000610","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919000610/rdgdoc.xml","form_type":"4"}},{"id":3699692,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2019-01-09T16:20:44.000Z","date":"2019-01-09","kind":"tax_withholding","acquired":false,"shares":4393,"price":63.67,"value":279702.31,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F2","text":"Date on which number of shares to be withheld was determined upon election of reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Number of shares withheld determined based on weighted average closing price of vested stock on January 7, 2019 (3,426 shares), January 3, 2019 (3,900 shares) and December 31, 2018 (1,300 shares)."}],"balance_after":27553,"source":{"system":"sec-edgar","filing":"0001437749-19-000610","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919000610/rdgdoc.xml","form_type":"4"}},{"id":3699691,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2019-01-09T16:20:44.000Z","date":"2019-01-07","kind":"exercise","acquired":true,"shares":3426,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2018 (as calculated on January 7, 2019) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 2,400 and the maximum number of shares available was 4,800 or 200% of target."}],"balance_after":31946,"source":{"system":"sec-edgar","filing":"0001437749-19-000610","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919000610/rdgdoc.xml","form_type":"4"}},{"id":3706740,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2019-01-04T15:57:14.000Z","date":"2019-01-02","kind":"grant","acquired":true,"shares":6100,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting annually over three years."}],"balance_after":6100,"derivative":{"exercise_price":63.85,"exercise_date":"2020-01-01","expiration_date":"2029-01-01","underlying":"Common Stock","underlying_shares":6100},"source":{"system":"sec-edgar","filing":"0001437749-19-000342","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919000342/rdgdoc.xml","form_type":"4"}},{"id":3706739,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2019-01-04T15:57:14.000Z","date":"2019-01-02","kind":"grant","acquired":true,"shares":3300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting annually over three years."}],"balance_after":28520,"source":{"system":"sec-edgar","filing":"0001437749-19-000342","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774919000342/rdgdoc.xml","form_type":"4"}},{"id":3849151,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2018-08-09T17:38:11.000Z","date":"2018-08-07","kind":"exercise","acquired":false,"shares":4600,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":2300,"derivative":{"exercise_price":35.05,"exercise_date":"2017-01-03","expiration_date":"2026-01-03","underlying":"Common Stock","underlying_shares":4600},"source":{"system":"sec-edgar","filing":"0001437749-18-015137","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918015137/rdgdoc.xml","form_type":"4"}},{"id":3849150,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2018-08-09T17:38:11.000Z","date":"2018-08-07","kind":"exercise","acquired":false,"shares":3120,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":27.97,"exercise_date":"2014-03-04","expiration_date":"2023-03-04","underlying":"Common Stock","underlying_shares":3120},"source":{"system":"sec-edgar","filing":"0001437749-18-015137","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918015137/rdgdoc.xml","form_type":"4"}},{"id":3849149,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2018-08-09T17:38:11.000Z","date":"2018-08-07","kind":"exercise","acquired":false,"shares":19367,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":25.25,"exercise_date":"2014-03-04","expiration_date":"2023-03-04","underlying":"Common Stock","underlying_shares":19367},"source":{"system":"sec-edgar","filing":"0001437749-18-015137","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918015137/rdgdoc.xml","form_type":"4"}},{"id":3849148,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-08-09T17:38:11.000Z","date":"2018-08-07","kind":"sale","acquired":false,"shares":27087,"price":70.031,"value":1896929.697,"ownership":{"direct":true},"balance_after":25220,"source":{"system":"sec-edgar","filing":"0001437749-18-015137","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918015137/rdgdoc.xml","form_type":"4"}},{"id":3849147,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-08-09T17:38:11.000Z","date":"2018-08-07","kind":"exercise","acquired":true,"shares":4600,"price":35.05,"value":161230.0,"ownership":{"direct":true},"balance_after":52307,"source":{"system":"sec-edgar","filing":"0001437749-18-015137","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918015137/rdgdoc.xml","form_type":"4"}},{"id":3849146,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-08-09T17:38:11.000Z","date":"2018-08-07","kind":"exercise","acquired":true,"shares":3120,"price":27.97,"value":87266.4,"ownership":{"direct":true},"balance_after":47707,"source":{"system":"sec-edgar","filing":"0001437749-18-015137","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918015137/rdgdoc.xml","form_type":"4"}},{"id":3849145,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-08-09T17:38:11.000Z","date":"2018-08-07","kind":"exercise","acquired":true,"shares":19367,"price":25.25,"value":489016.75,"ownership":{"direct":true},"balance_after":44587,"source":{"system":"sec-edgar","filing":"0001437749-18-015137","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918015137/rdgdoc.xml","form_type":"4"}},{"id":4000094,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-03-13T16:56:36.000Z","date":"2018-03-09","kind":"tax_withholding","acquired":false,"shares":800,"price":56.2,"value":44960.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Closing price of stock on March 9, 2018; used to determine number of shares tendered to satisfy tax withholding obligation."}],"balance_after":25220,"source":{"system":"sec-edgar","filing":"0001437749-18-004516","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918004516/rdgdoc.xml","form_type":"4"}},{"id":4102562,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Unit","published_at":"2018-01-10T15:49:24.000Z","date":"2018-01-08","kind":"exercise","acquired":false,"shares":1090,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2017 (as calculated on January 8, 2018) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 1,066 and the maximum number of shares available was 2,132 or 200% of target."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2017 (as calculated on January 8, 2018) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 1,066 and the maximum number of shares available was 2,132 or 200% of target."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2017 (as calculated on January 8, 2018) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 1,066 and the maximum number of shares available was 2,132 or 200% of target."}],"balance_after":0,"derivative":{"expiration_date":"2017-12-31","underlying":"Common Stock","underlying_shares":1090},"source":{"system":"sec-edgar","filing":"0001437749-18-000482","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918000482/rdgdoc.xml","form_type":"4"}},{"id":4102561,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-01-10T15:49:24.000Z","date":"2018-01-09","kind":"tax_withholding","acquired":false,"shares":560,"price":52.9,"value":29624.0,"ownership":{"direct":true},"footnotes":[{"field":"date","element":"transactionDate","label":"F2","text":"Date on which number of shares to be withheld was determined upon election of reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Number of shares withheld determined based on closing price of stock on January 8, 2018."}],"balance_after":26020,"source":{"system":"sec-edgar","filing":"0001437749-18-000482","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918000482/rdgdoc.xml","form_type":"4"}},{"id":4102560,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-01-10T15:49:24.000Z","date":"2018-01-08","kind":"exercise","acquired":true,"shares":1090,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The number of shares reported represents the shares earned during the three year performance period ending December 31, 2017 (as calculated on January 8, 2018) based on US Ecology, Inc.'s total shareholder return relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%). The target number of shares was 1,066 and the maximum number of shares available was 2,132 or 200% of target."}],"balance_after":26580,"source":{"system":"sec-edgar","filing":"0001437749-18-000482","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918000482/rdgdoc.xml","form_type":"4"}},{"id":4109688,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2018-01-04T12:50:09.000Z","date":"2018-01-02","kind":"grant","acquired":true,"shares":2400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Grant of Performance Stock Units.  Each performance stock unit represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the performance stock units.  The actual number of shares to be delivered in settlement  of the performance stock units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the performance stock units.  The performance stock units will settle as soon as practicable after December 31, 2020."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Grant of Performance Stock Units.  Each performance stock unit represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the performance stock units.  The actual number of shares to be delivered in settlement  of the performance stock units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the performance stock units.  The performance stock units will settle as soon as practicable after December 31, 2020."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F4","text":"Grant of Performance Stock Units.  Each performance stock unit represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the performance stock units.  The actual number of shares to be delivered in settlement  of the performance stock units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the performance stock units.  The performance stock units will settle as soon as practicable after December 31, 2020."}],"balance_after":2400,"derivative":{"expiration_date":"2020-12-31","underlying":"Common Stock","underlying_shares":2400},"source":{"system":"sec-edgar","filing":"0001437749-18-000236","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918000236/rdgdoc.xml","form_type":"4"}},{"id":4109687,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2018-01-04T12:50:09.000Z","date":"2018-01-02","kind":"grant","acquired":true,"shares":6900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"Issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting annually over three years."}],"balance_after":6900,"derivative":{"exercise_price":51,"exercise_date":"2019-01-01","expiration_date":"2028-01-01","underlying":"Common Stock","underlying_shares":6900},"source":{"system":"sec-edgar","filing":"0001437749-18-000236","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918000236/rdgdoc.xml","form_type":"4"}},{"id":4109686,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2018-01-04T12:50:09.000Z","date":"2018-01-02","kind":"grant","acquired":true,"shares":3900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting annually over three years."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Reflects a transfer of 9,000 shares exempt from Section 16 and occurring after the Reporting Person's Form 4 filed on August 28, 2017."}],"balance_after":25490,"source":{"system":"sec-edgar","filing":"0001437749-18-000236","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774918000236/rdgdoc.xml","form_type":"4"}},{"id":4224133,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-25","kind":"exercise","acquired":false,"shares":1058,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":19.71,"exercise_date":"2012-03-21","expiration_date":"2022-02-21","underlying":"Common Stock","underlying_shares":1058},"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224132,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":false,"shares":5609,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":19367,"derivative":{"exercise_price":25.25,"exercise_date":"2014-03-05","expiration_date":"2023-03-04","underlying":"Common Stock","underlying_shares":5609},"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224131,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":false,"shares":3420,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":1058,"derivative":{"exercise_price":19.71,"exercise_date":"2012-03-21","expiration_date":"2022-02-21","underlying":"Common Stock","underlying_shares":3420},"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224130,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":false,"shares":2392,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":16.18,"exercise_date":"2011-04-10","expiration_date":"2021-03-10","underlying":"Common Stock","underlying_shares":2392},"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224129,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":false,"shares":6600,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":20.63,"exercise_date":"2010-01-02","expiration_date":"2019-01-02","underlying":"Common Stock","underlying_shares":6600},"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224128,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":false,"shares":857,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":23.48,"exercise_date":"2008-12-06","expiration_date":"2017-12-06","underlying":"Common Stock","underlying_shares":857},"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224127,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-25","kind":"sale","acquired":false,"shares":1058,"price":46.7,"value":49408.6,"ownership":{"direct":true},"balance_after":30590,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224126,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-25","kind":"exercise","acquired":true,"shares":1058,"price":19.71,"value":20853.18,"ownership":{"direct":true},"balance_after":31648,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224125,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"sale","acquired":false,"shares":5609,"price":46.87,"value":262893.83,"ownership":{"direct":true},"balance_after":30590,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224124,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":true,"shares":5609,"price":25.25,"value":141627.25,"ownership":{"direct":true},"balance_after":36199,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224123,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"sale","acquired":false,"shares":3420,"price":46.78,"value":159987.6,"ownership":{"direct":true},"balance_after":30590,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224122,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":true,"shares":3420,"price":19.71,"value":67408.2,"ownership":{"direct":true},"balance_after":34010,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224121,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"sale","acquired":false,"shares":2392,"price":46.78,"value":111897.76,"ownership":{"direct":true},"balance_after":30590,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224120,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":true,"shares":2392,"price":16.18,"value":38702.56,"ownership":{"direct":true},"balance_after":32982,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224119,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"sale","acquired":false,"shares":6600,"price":46.78,"value":308748.0,"ownership":{"direct":true},"balance_after":30590,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224118,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":true,"shares":6600,"price":20.63,"value":136158.0,"ownership":{"direct":true},"balance_after":37190,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224117,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"sale","acquired":false,"shares":857,"price":46.87,"value":40167.59,"ownership":{"direct":true},"balance_after":30590,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4224116,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-08-28T14:45:39.000Z","date":"2017-08-24","kind":"exercise","acquired":true,"shares":857,"price":23.48,"value":20122.36,"ownership":{"direct":true},"balance_after":31447,"source":{"system":"sec-edgar","filing":"0001437749-17-015374","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917015374/rdgdoc.xml","form_type":"4"}},{"id":4509212,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Performance Stock Units","published_at":"2017-01-03T19:25:15.000Z","date":"2017-01-02","kind":"grant","acquired":true,"shares":2000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Grant of Performance Stock Units.  Each performance stock unit represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the performance stock units.  The actual number of shares to be delivered in settlement  of the performance stock units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the performance stock units.  The performance stock units will settle as soon as practicable after December 31, 2019."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Grant of Performance Stock Units.  Each performance stock unit represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the performance stock units.  The actual number of shares to be delivered in settlement  of the performance stock units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the performance stock units.  The performance stock units will settle as soon as practicable after December 31, 2019."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"Grant of Performance Stock Units.  Each performance stock unit represents a contingent right to receive 1 share of US Ecology, Inc. Common Stock. The number of shares reported represents the target number of shares underlying the performance stock units.  The actual number of shares to be delivered in settlement  of the performance stock units earned during the performance period will be based on US Ecology, Inc.'s total shareholder return over the three year vesting period relative to the S&P 600 (weighted at 50%) and a peer group of certain companies in the environmental and facilities services industry (weighted at 50%) and could equal 200% of the target number of shares underlying the performance stock units.  The performance stock units will settle as soon as practicable after December 31, 2019."}],"balance_after":2000,"derivative":{"expiration_date":"2019-12-31","underlying":"Common Stock","underlying_shares":2000},"source":{"system":"sec-edgar","filing":"0001437749-17-000061","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917000061/rdgdoc.xml","form_type":"4"}},{"id":4509211,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock Option","published_at":"2017-01-03T19:25:15.000Z","date":"2017-01-02","kind":"grant","acquired":true,"shares":6000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting annually over three years."}],"balance_after":6000,"derivative":{"exercise_price":49.15,"exercise_date":"2018-01-02","expiration_date":"2027-01-01","underlying":"Common Stock","underlying_shares":6000},"source":{"system":"sec-edgar","filing":"0001437749-17-000061","document":"rdgdoc.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917000061/rdgdoc.xml","form_type":"4"}},{"id":4509210,"issuer":{"id":154125,"kind":"organization","name":"US Ecology Holdings, Inc.","symbol":"ECOL"},"owners":[{"id":81620,"kind":"person","name":"Gerratt Eric L","position":1,"cik":"0001409319","reported_name":"Gerratt Eric L","relationship":{"officer":true,"officer_title":"EVP and CFO"}}],"security":"Common Stock","published_at":"2017-01-03T19:25:15.000Z","date":"2017-01-02","kind":"grant","acquired":true,"shares":3300,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted stock issued pursuant to US Ecology, Inc. Omnibus Incentive Plan, vesting after the third year anniversary."}],"balance_after":30590,"source":{"system":"sec-edgar","filing":"0001437749-17-000061","document":"rdgdoc.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/742126/000143774917000061/rdgdoc.xml","form_type":"4"}}]}