Ecovyst (ECVT) 8-K Entry into a Material Definitive Agreement

Exhibit 99.1

Information Relating to Part II.

Item 14. - Other Expenses of Issuance and Distribution

The expenses in connection with the offer and sale of shares of common stock of PQ Group Holdings Inc., registered pursuant to the Registration Statement on Form S-3 (Registration No. 333-255514) filed on April 26, 2021, other than underwriting discounts and commissions, are set forth in the following table. All amounts are estimated except the Securities and Exchange Commission registration fee.

Securities and Exchange Commission registration fee	$	21,956.40
FINRA filing fee		—
Blue sky fees and expenses		10,000
Printing and engraving expenses		50,000
Accounting fees and expenses		415,000
Legal fees and expenses		460,000
Transfer agent and registrar fees		8,200
Miscellaneous fees and expenses		34,843.60
TOTAL	$	1,000,000