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The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":666324,"source":{"system":"sec-edgar","filing":"0000899243-18-024973","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318024973/doc4.xml","form_type":"4"}},{"id":3810373,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-09-21T00:05:05.000Z","date":"2018-09-18","kind":"sale","acquired":false,"shares":37113,"price":17.85,"value":662467.05,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares sold on September 18, 2018 were sold in multiple transactions at prices ranging from $17.80 to $17.90, inclusive. The shares sold on September 19, 2018 were sold in multiple transactions at prices ranging from $17.81 to $18.03, inclusive. The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":682534,"source":{"system":"sec-edgar","filing":"0000899243-18-024973","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318024973/doc4.xml","form_type":"4"}},{"id":3812272,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-09-18T23:50:39.000Z","date":"2018-09-17","kind":"sale","acquired":false,"shares":21302,"price":17.84,"value":380027.68,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares sold on September 14, 2018 were sold in multiple transactions at prices ranging from $17.80 to $17.83, inclusive. The shares sold on September 17, 2018 were sold in multiple transactions at prices ranging from $17.80 to $17.94, inclusive. The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":719647,"source":{"system":"sec-edgar","filing":"0000899243-18-024697","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318024697/doc4.xml","form_type":"4"}},{"id":3812271,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-09-18T23:50:39.000Z","date":"2018-09-14","kind":"sale","acquired":false,"shares":3290,"price":17.81,"value":58594.9,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares sold on September 14, 2018 were sold in multiple transactions at prices ranging from $17.80 to $17.83, inclusive. The shares sold on September 17, 2018 were sold in multiple transactions at prices ranging from $17.80 to $17.94, inclusive. The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":740949,"source":{"system":"sec-edgar","filing":"0000899243-18-024697","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318024697/doc4.xml","form_type":"4"}},{"id":3817790,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-09-12T20:25:56.000Z","date":"2018-09-11","kind":"sale","acquired":false,"shares":2939,"price":17.92,"value":52666.88,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares sold on September 10, 2018 were sold in multiple transactions at prices ranging from $17.90 to $17.93, inclusive. The shares sold on September 11, 2018 were sold in multiple transactions at prices ranging from $17.90 to $17.935, inclusive.  The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":744239,"source":{"system":"sec-edgar","filing":"0000899243-18-024277","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318024277/doc4.xml","form_type":"4"}},{"id":3817789,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-09-12T20:25:56.000Z","date":"2018-09-10","kind":"sale","acquired":false,"shares":1800,"price":17.91,"value":32238.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares sold on September 10, 2018 were sold in multiple transactions at prices ranging from $17.90 to $17.93, inclusive. The shares sold on September 11, 2018 were sold in multiple transactions at prices ranging from $17.90 to $17.935, inclusive.  The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":747178,"source":{"system":"sec-edgar","filing":"0000899243-18-024277","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318024277/doc4.xml","form_type":"4"}},{"id":3826908,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-09-05T00:14:05.000Z","date":"2018-08-30","kind":"sale","acquired":false,"shares":13041,"price":17.93,"value":233825.13,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $17.90 to $17.99, inclusive. The shares that were sold on August 28, 2018, as previously reported on Form 4 on August 30, 2018, were sold in multiple transactions at prices ranging from $17.90 to $17.98, inclusive. The shares that were sold on August 29, 2018, as previously reported on Form 4 on August 30, 2018, were sold in multiple transactions at prices ranging from $17.90 to $17.91, inclusive. The reporting person undertakes to provide to PQ Group Holdings Inc., any security holder of PQ Group Holdings Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein."}],"balance_after":748978,"source":{"system":"sec-edgar","filing":"0000899243-18-023770","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318023770/doc4.xml","form_type":"4"}},{"id":3829340,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-08-30T20:54:52.000Z","date":"2018-08-29","kind":"sale","acquired":false,"shares":900,"price":17.9056,"value":16115.04,"ownership":{"direct":true},"balance_after":762019,"source":{"system":"sec-edgar","filing":"0000899243-18-023554","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318023554/doc4.xml","form_type":"4"}},{"id":3829339,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2018-08-30T20:54:52.000Z","date":"2018-08-28","kind":"sale","acquired":false,"shares":3405,"price":17.9399,"value":61085.3595,"ownership":{"direct":true},"balance_after":762919,"source":{"system":"sec-edgar","filing":"0000899243-18-023554","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924318023554/doc4.xml","form_type":"4"}},{"id":4191680,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Stock Option (right to buy)","published_at":"2017-10-04T21:12:15.000Z","date":"2017-10-02","kind":"grant","acquired":true,"shares":55762,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option vests in three equal annual installments beginning on October 2, 2018."}],"balance_after":55762,"derivative":{"exercise_price":16.97,"expiration_date":"2027-10-02","underlying":"Common Stock","underlying_shares":55762},"source":{"system":"sec-edgar","filing":"0000899243-17-023539","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924317023539/doc4.xml","form_type":"4"}},{"id":4191679,"issuer":{"id":4897,"kind":"organization","name":"Ecovyst Inc.","symbol":"ECVT"},"owners":[{"id":163482,"kind":"person","name":"Ferrall Paul","position":1,"cik":"0001718007","reported_name":"Ferrall Paul","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"See Remarks"}}],"security":"Common Stock","published_at":"2017-10-04T21:12:15.000Z","date":"2017-10-02","kind":"grant","acquired":true,"shares":70713,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":766324,"source":{"system":"sec-edgar","filing":"0000899243-17-023539","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1708035/000089924317023539/doc4.xml","form_type":"4"}}]}