| 2026-05-26 | 8-K | 10.1 | Form of Indemnification Agreement |
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| 2026-05-06 | 10-Q | 10.1 | Restated and Amended Richards Bay Chloride Slag Sales Agreement by and between Richards Bay Titanium (Proprietary) Limited (acting through its sales agent) and Kronos (US), Inc. effective January 1, 2016, as amended through Amendment dated February 13, 2026 (and effective January 1, 2026) between Richards Bay Titanium (Proprietary) Limited (acting through its sales agent Rio Tinto Iron and Titanium Canada Inc.) and Kronos (US), Inc. |
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| 2025-09-15 | 8-K | 10.2 | ADDITIONAL NOTES PRIORITY JOINDER AGREEMENT |
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| 2025-09-15 | 8-K | 10.1 | THIRD SUPPLEMENTAL INDENTURE |
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| 2025-03-06 | 10-K | 10.26 | Consent Decree effective February 10, 2025, among NL Industries, Inc., the United States of America (on behalf of several agencies) and certain other plaintiff parties and defendant parties, relating to the Raritan Bay Slag Superfund Site. |
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| 2024-11-06 | 10-Q | 10.7 | Amendment to Purchase and Sale Agreement dated August 13, 2024, by and between Kronos Louisiana, Inc., Kronos Worldwide, Inc., Venator Investments, Ltd., Venator Materials PLC. and Louisiana Pigment Company, L.P, amending Purchase Agreement dated as of July 16, 2024. |
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| 2024-11-06 | 10-Q | 10.6 | Joinder No. 1 dated as of August 7, 2024, joining Louisiana Pigment Company, L.P. and Kronos LPC, LLC to the Guaranty and Security Agreement dated as of April 20, 2021, as amended. |
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| 2024-11-06 | 10-Q | 10.5 | First Amendment to Guaranty and Security Agreement, entered into as of July 17, 2024, by and among Kronos Worldwide, Inc., Kronos Louisiana, Inc., Kronos (US), Inc., Kronos International, Inc. and Wells Fargo Bank, National Association as administrative agent and lender, amending Guaranty and Security Agreement dated as of April 20, 2021. |
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| 2024-11-06 | 10-Q | 10.4 | Pledge Amendment dated as of August 8, 2024, to the Pledge Agreement dated as of September 13, 2017, executed by Kronos Louisiana, Inc. and Kronos LPC, LLC regarding additional pledged securities. |
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| 2024-11-06 | 10-Q | 10.3 | Joinder No. 1 dated as of August 8, 2024, to the Pledge Agreement dated as of September 13, 2017, joining Louisiana Pigment Company, L.P. and Kronos LPC, LLC to the Pledge Agreement. |
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| 2024-11-06 | 10-Q | 10.2 | Second Supplemental Indenture dated as of August 8, 2024, among Louisiana Pigment Company, L.P. and Kronos LPC, LLC (as new guarantors under the Indenture dated as of February 12, 2024, as amended), Kronos International, Inc., and Deutsche Bank Trust Company Americas, as trustee, collateral agent, paying agent, transfer agent and registrar. |
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| 2024-11-06 | 10-Q | 10.1 | Supplemental Indenture No. 2, dated as of August 8, 2024, among Louisiana Pigment Company, L.P. and Kronos LPC, LLC (as new guarantors under the Indenture dated as of September 13, 2017, as amended), Kronos International, Inc., and Deutsche Bank Trust Company Americas, as trustee, collateral agent, paying agent, transfer agent and registrar. |
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| 2024-08-07 | 10-Q | 10.5 | First Amendment to Unsecured Subordinated Term Promissory Note dated February 12, 2024, executed by Kronos Worldwide, Inc. and Contran Corporation as of August 7, 2024. |
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| 2024-03-06 | 10-K | 10.13 | Cancellation of Unsecured Revolving Demand Promissory Note between Valhi, Inc. and Kronos Worldwide, Inc. dated February 21, 2024. |
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| 2023-08-02 | 10-Q | 10.1 | NL Industries, Inc. 2023 Non-Employee Director Stock Plan. |
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| 2023-03-08 | 10-K | 10.12 | Unsecured Revolving Demand Promissory Note dated December 31, 2022 in the principal amount of $25.0 million executed by Valhi, Inc. and payable to the order of Kronos Worldwide, Inc. |
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| 2022-11-09 | 8-K | 10.2 | First Amendment to Back-to-Back Loan Agreement between NL Industries, Inc., as Borrower, and NLKW Holding, LLC, as Lender, dated as of November 9, 2022. |
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| 2022-11-09 | 8-K | 10.1 | First Amendment to Loan Agreement between NLKW Holding, LLC, as Borrower, and Valhi, Inc., as Lender, dated as of November 9, 2022. |
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| 2022-03-09 | 10-K | 10.12 | Unsecured Revolving Demand Promissory Note dated December 31, 2021 in the principal amount of $30.0 million executed by Valhi, Inc. and payable to the order of Kronos Worldwide, Inc. |
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| 2021-05-05 | 10-Q | 10.2 | Guaranty and Security Agreement dated as of April 20, 2021, by and among Kronos Worldwide, Inc., Kronos Louisiana, Inc., Kronos (US), Inc., Kronos Canada, Inc., Kronos International, Inc. and Wells Fargo Bank, National Association as administrative agent and lender. |
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| 2021-05-05 | 10-Q | 10.1 | Credit Agreement dated as of April 20, 2021 by and among Kronos Worldwide, Inc., Kronos Louisiana, Inc., Kronos (US), Inc., Kronos Canada, Inc., Kronos Europe NV, Kronos Titan GmbH and Wells Fargo Bank, National Association as administrative agent and lender. |
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| 2021-03-10 | 10-K | 10.12 | Unsecured Revolving Demand Promissory Note dated December 31, 2020 in the principal amount of $40.0 million executed by Valhi, Inc. and payable to the order of Kronos Worldwide, Inc. |
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| 2020-03-11 | 10-K | 10.25 | Tax Agreement among NL Industries, Inc., Valhi, Inc. and Contran Corporation dated as of January 1, 2020. |
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| 2020-03-11 | 10-K | 10.24 | Tax Agreement between Valhi, Inc. and Kronos Worldwide, Inc. dated as of January 1, 2020. |
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| 2020-03-11 | 10-K | 10.12 | Unsecured Revolving Demand Promissory Note dated December 31, 2019 in the original principal amount of $60.0 million executed by Valhi, Inc. and payable to the order of Kronos Worldwide, Inc. |
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| 2019-05-09 | 10-Q | 10.1 | Registration Agreement dated March 11, 2019 between NL Industries, Inc. and Valhi, Inc. |
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| 2019-03-11 | 10-K | 10.20 | Second Amended and Restated Agreement Regarding Shared Insurance among CompX International Inc., Contran Corporation, Kronos Worldwide, Inc., NL Industries, Inc. and Valhi, Inc. dated January 25, 2019. |
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| 2019-03-11 | 10-K | 10.12 | Unsecured Revolving Promissory Note dated December 31, 2018 in the original principal amount of $60.0 million executed by Valhi, Inc. and payable to the order of Kronos Worldwide, Inc. |
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| 2018-03-12 | 10-K | 10.12 | Eleventh Amended and Restated Unsecured Revolving Promissory Note dated December 31, 2017 in the original principal amount of $60.0 million executed by Valhi, Inc. and payable to the order of Kronos Worldwide, Inc. |
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| 2016-11-15 | 8-K | 10.4 | BACK-TO-BACK PLEDGE AND SECURITY AGREEMENT |
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| 2016-11-15 | 8-K | 10.3 | BACK-TO-BACK LOAN AGREEMENT |
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| 2016-11-15 | 8-K | 10.2 | PLEDGE AND SECURITY AGREEMENT |
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| 2016-11-15 | 8-K | 10.1 | LOAN AGREEMENT BETWEEN NLKW HOLDINGS, LLC, AS BORROWER, AND VALHI, INC. AS LENDER |
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| 2016-05-26 | 8-K | 10.1 | EXHIBIT 10.1 TO NL FORM 8-K DATED MAY 26, 2016 |
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| 2016-03-10 | 10-K | 10.35 | Sixth Amended and Restated Unsecured Revolving Demand Promissory Note dated December 31, 2015 in the original principal amount of $40.0 million executed by NL Industries, Inc. and payable to the order of Valhi, Inc. |
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| 2016-03-10 | 10-K | 10.29 | First Amended and Restated Agreement Regarding Shared Insurance among CompX International Inc., Contran Corporation, Keystone Consolidated Industries, Inc., Kronos Worldwide, Inc., NL Industries, Inc. and Valhi, Inc. dated October 15, 2015. |
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| 2015-03-12 | 10-K | 10.35 | Fifth Amended and Restated Unsecured Revolving Demand Promissory Note dated December 31, 2014 in the original principal amount of $40.0 million executed by NL Industries, Inc. and payable to the order of Valhi, Inc. |
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| 2014-03-12 | 10-K | 10.45 | Fourth Amended and Restated Unsecured Revolving Demand Promissory Note dated December 31, 2013 in the original principal amount of $40.0 million executed by NL Industries, Inc. and payable to the order of Valhi, Inc. |
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| 2013-03-12 | 10-K | 10.42 | Third Amended and Restated Unsecured Revolving Demand Promissory Note dated December 31, 2012 in the original principal amount of $40.0 million executed by NL Industries, Inc. and payable to the order of Valhi, Inc. |
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| 2013-03-12 | 10-K | 10.40 | Amended and Restated Tax Agreement among NL Industries, Inc., Valhi, Inc. and Contran Corporation effective December 1, 2012 subsidiaries of the Registrant. |
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| 2012-03-06 | 10-K | 10.44 | SECOND AMENDED AND RESTATED UNSECURED REVOLVING DEMAND PROMISSORY NOTE |
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| 2011-03-07 | 10-K | 10.46 | NL 2010 10K EX 10.46 |
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| 2010-08-03 | 10-Q | 10.35 | EXHIBIT REINSTATED AND AMENDED SETTLEMENT AGREEMENT |
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| 2010-03-10 | 10-K | 10.40 | NL INDUSTRIES, INC. 10K09 EXHIBIT 10.40 |
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| 2010-03-10 | 10-K | 10.39 | NL INDUSTRIES, INC. 10K09 EXHIBIT 10.39 |
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| 2010-03-10 | 10-K | 10.38 | NL INDUSTRIES, INC. 10K09 EXHIBIT 10.38 |
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| 2010-03-10 | 10-K | 10.35 | NL INDUSTRIES, INC. 10K09 EXHIBIT 10.35 |
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