Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38221 | --- | --- | --- | |----------------------------------------------------------------------------------- ...

Ecovyst Inc. (NYSE:ECVT) Q2 2021 Results Conference Call August 5, 2021 11:00 AM ET Company Participants Nahla Azmy - Vice President of Investor Relations and Financial Communications Belgacem Chariag - Chairman, President and Chief Executive Officer Mike Feehan - Vice President and Chief Financial Officer Conference Call Participants David Begleiter - Deutsche Bank Angel Castillo - Morgan Stanley Aleksey Yefremov - KeyBanc Capital Markets Operator Good morning. My name is Britney, and I will be your conf ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38221 PQ Group Holdings Inc. Delaware 81-3406833 (State or other jurisdiction of incorporation or organizatio ...

PQ Group Holdings Inc. (PQG) Q1 2021 Earnings Conference Call May 6, 2021 11:00 AM ET Company Participants Nahla Azmy - Vice President of Investor Relations and Financial Communications Belgacem Chariag - President & Chief Executive Officer Michael Crews - Chief Financial Officer Conference Call Participants David Begleiter - Deutsche Bank Angel Castillo - Morgan Stanley Alex Yefremov - KeyBanc Capital Markets David Silver - C.L. King Operator Good morning. My name is Catherine and I'll be your conference o ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38221 PQ Group Holdings Inc. Delaware 81-3406833 (State or other jurisdiction of incorporation or organization)(I. ...

PQ Group Holdings Inc. (PQG) Q4 2020 Earnings Conference Call March 9, 2020 11:00 AM ET Company Participants Nahla Azmy - Head, Investor Relations Belgacem Chariag - Chairman, President and CEO Mike Crews - EVP and CFO Conference Call Participants David Begleiter - Deutsche Bank Roger Spitz - Bank of America Alex Yefremov - KeyBanc David Silver - CL King Operator Good morning. My name is Nikki and I will be your conference operator today. Welcome to the PQ Group Holdings Fourth Quarter and Full Year 2020 Ea ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-38221 PQ Group Holdings Inc. Delaware 81-3406833 (State or other jurisdiction of incorporation or organiz ...

PQ Group Holdings Inc. (PQG) Q3 2020 Earnings Conference Call October 30, 2020 10:30 AM ET Company Participants Nahla Azmy - Head, Investor Relations Belgacem Chariag - Chairman, President and Chief Executive Officer Mike Crews - Executive Vice President and Chief Financial Officer Conference Call Participants David Begleiter - Deutsche Bank John McNulty - BMO Capital Markets Chris Parkinson - Credit Suisse Dan Rizwan - Jefferies Angel Castillo - Morgan Stanley Operator [Abrupt start] And I'll be your confe ...

Table of Contents Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading symbol Name of each exchange on which registered Common stock, par value $0.01 per share PQG New York Stock Exchange UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE ...

PQ Group Holdings Inc. (PQG) Q2 2020 Results Conference Call July 30, 2020 11:00 AM ET Company Participants Nahla Azmy - VP, IR Belgacem Chariag - Chairman, President and CEO Mike Crews - EVP and CFO Conference Call Participants Kieran Christopher - Crédit Suisse Tom Glinski - Goldman Sachs Angel Castillo - Morgan Stanley Kendall Marthaler - Citi David Begleiter - Deutsche Bank Laurence Alexander - Jefferies Colton Bina - BMO Capital Markets David Silver - CL King Silke Kueck - JPMorgan Operator Good day, a ...