Effective January 30, 2017, Kronos Worldwide, Inc., certain of its North American subsidiaries and Wells Fargo entered into a Third Amendment to the Revolving Facility. The registrant, certain of its North American subsidiaries and Wells Fargo had previously entered into two non-substantive amendments to the Revolving Facility. Under the Third Amendment, among other things: The maturity date of the Revolving Facility was extended to the earlier of (i) January 30, 2022 and (ii) 90 days prior to the maturity date of the registrant's existing term loan indebtedness (or 90 days prior to the maturity date of any indebtedness incurred in a permitted refinancing of such existing term loan indebtedness); and The percentage of outstanding, non-past-due receivables from certain large North American customers that are incorporated into the borrowing base computation under the Revolving Facility was increased from 40% to 60%.