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Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":9.11,"expiration_date":"2022-01-18","underlying":"Common Stock","underlying_shares":14100},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211938,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":16900,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":4.59,"expiration_date":"2023-01-23","underlying":"Common Stock","underlying_shares":16900},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211937,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":20000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":6.72,"expiration_date":"2024-01-22","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211936,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":36500,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":6.205,"expiration_date":"2024-05-29","underlying":"Common Stock","underlying_shares":36500},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211935,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":31700,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":3.975,"expiration_date":"2025-01-21","underlying":"Common Stock","underlying_shares":31700},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211934,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":47900,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":5.15,"expiration_date":"2025-05-28","underlying":"Common Stock","underlying_shares":47900},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211933,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":199300,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":1.74,"expiration_date":"2026-01-20","underlying":"Common Stock","underlying_shares":199300},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211932,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":173700,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This option was fully vested and exercisable at the time of the Merger."}],"balance_after":0,"derivative":{"exercise_price":9.78,"expiration_date":"2027-01-18","underlying":"Common Stock","underlying_shares":173700},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211931,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":281600,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"Two-thirds of this option was vested at the time of the Merger. The option was converted into an option to purchase 112,640 Cliffs common shares at an exercise price of $16.39 per share, with the remaining one-thirds of the option vesting on January 17, 2021."}],"balance_after":0,"derivative":{"exercise_price":6.56,"expiration_date":"2028-01-17","underlying":"Common Stock","underlying_shares":281600},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211930,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":407143,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"One-third of this option was vested at the time of the Merger. The option was converted into an option to purchase 162,857 Cliffs common shares at an exercise price of $6.64 per share, with the remaining two-thirds of the option vesting in two equal installments on January 23, 2021 and January 23, 2022."}],"balance_after":0,"derivative":{"exercise_price":2.655,"expiration_date":"2029-01-23","underlying":"Common Stock","underlying_shares":407143},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211929,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Employee Stock Option (Right to Buy)","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":402100,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the terms of the Merger Agreement, each stock option of the Issuer outstanding immediately prior to the effective time of the Merger (whether vested or unvested), other than certain options that were canceled in exchange for a cash payment, was automatically converted into an option to purchase a number of Cliffs common shares equal to the total number of shares of Common Stock subject to such option immediately prior to the effective time of the Merger, multiplied by the Exchange Ratio, and at a per-share exercise price equal to the per-share exercise price applicable to the option immediately prior to the effective time of the Merger, divided by the Exchange Ratio."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option, which would have vested in three equal installments beginning on January 22, 2021, was converted into an option to purchase 160,840 Cliffs common shares at an exercise price of $7.58 per share on the same vesting terms."}],"balance_after":0,"derivative":{"exercise_price":3.03,"expiration_date":"2030-01-22","underlying":"Common Stock","underlying_shares":402100},"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211928,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":829,"ownership":{"direct":false,"nature":"By Father"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects disposition in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated December 2, 2019 (the \"Merger Agreement\"), among the Issuer, Cleveland-Cliffs Inc. (\"Cliffs\") and Pepper Merger Sub Inc. (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer (the \"Merger\"), with the Issuer surviving the Merger as a wholly owned subsidiary of Cliffs, and each share of the Issuer's common stock, par value $0.01 per share (the \"Common Stock\"), outstanding immediately prior to the effective time of the Merger was converted into the right to receive 0.400 (the \"Exchange Ratio\") of a common share of Cliffs, together with cash in lieu of any fractional Cliffs common shares. The closing price of a share of Common Stock on March 12, 2020 (the last trading day prior to the Merger) was $1.55, and the closing price of a Cliffs common share on the same date was $4.06."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects disposition in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated December 2, 2019 (the \"Merger Agreement\"), among the Issuer, Cleveland-Cliffs Inc. (\"Cliffs\") and Pepper Merger Sub Inc. (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer (the \"Merger\"), with the Issuer surviving the Merger as a wholly owned subsidiary of Cliffs, and each share of the Issuer's common stock, par value $0.01 per share (the \"Common Stock\"), outstanding immediately prior to the effective time of the Merger was converted into the right to receive 0.400 (the \"Exchange Ratio\") of a common share of Cliffs, together with cash in lieu of any fractional Cliffs common shares. The closing price of a share of Common Stock on March 12, 2020 (the last trading day prior to the Merger) was $1.55, and the closing price of a Cliffs common share on the same date was $4.06."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The Reporting Person has control over his elderly father's investment portfolio that holds shares of Common Stock of the Issuer."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000918160-20-000052","document":"wf-form4_158413871221962.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/918160/000091816020000052/wf-form4_158413871221962.xml","form_type":"4"}},{"id":3211927,"issuer":{"id":150673,"kind":"organization","name":"AK STEEL HOLDING CORP","symbol":"AKS"},"owners":[{"id":30686,"kind":"person","name":"Newport Roger K","position":1,"cik":"0001298509","reported_name":"Newport Roger K","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Common Stock","published_at":"2020-03-13T18:32:10.000Z","date":"2020-03-13","kind":"disposition_to_issuer","acquired":false,"shares":834709.259,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Reflects disposition in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated December 2, 2019 (the \"Merger Agreement\"), among the Issuer, Cleveland-Cliffs Inc. (\"Cliffs\") and Pepper Merger Sub Inc. (\"Merger Sub\"), pursuant to which Merger Sub merged with and into the Issuer (the \"Merger\"), with the Issuer surviving the Merger as a wholly owned subsidiary of Cliffs, and each share of the Issuer's common stock, par value $0.01 per share (the \"Common Stock\"), outstanding immediately prior to the effective time of the Merger was converted into the right to receive 0.400 (the \"Exchange Ratio\") of a common share of Cliffs, together with cash in lieu of any fractional Cliffs common shares. The closing price of a share of Common Stock on March 12, 2020 (the last trading day prior to the Merger) was $1.55, and the closing price of a Cliffs common share on the same date was $4.06."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Reflects disposition in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated December 2, 2019 (the \"Merger Agreement\"), among the Issuer, Cleveland-Cliffs Inc. (\"Cliffs\") and Pepper Merger Sub Inc. 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