Organon & Co.

17. Third-Party Arrangements

On June 2, 2021, Organon and Merck entered into a Separation and Distribution Agreement (the “Separation and Distribution Agreement”). Pursuant to the Separation and Distribution Agreement, Merck agreed to spin off the Organon products into Organon, a new, publicly-traded company (the “Separation”).

The Separation and Distribution Agreement, contains provisions that, among other things, relate to (i) assets, liabilities and contracts to be transferred, assumed and assigned to each of Organon and Merck as part of the Separation, (ii) cross-indemnities principally designed to place financial responsibility for the obligations and liabilities of the Organon business with Organon and financial responsibility for the obligations and liabilities of Merck’s remaining business with Merck, (iii) procedures with respect to claims subject to indemnification and related matters, (iv) the allocation between Organon and Merck of rights and obligations under existing insurance policies with respect to occurrences prior to completion of the Distribution, as well as the right to proceeds and the obligation to incur certain deductibles under certain insurance policies, and (v) procedures governing Organon’s and Merck’s obligations and allocations of liabilities with respect to ongoing litigation matters that may implicate each of Merck’s business and Organon’s business.

Agreements that Organon entered into with Merck that govern aspects of Organon’s relationship with Merck following the Separation include:

•Interim Operating Agreements - Merck and Organon entered into a series of interim operating model (“IOM”) agreements, pursuant to which Merck and certain of its affiliates that held licenses, permits and other rights in connection with marketing, import and/or distribution of Organon products in various jurisdictions prior to the Separation, continue to market, import and distribute such products until such time as the relevant licenses and permits are transferred to Organon or its affiliates, while permitting Organon (or Merck, as applicable) to recognize revenue relating to the sale of its respective products, to the extent practicable. Under such IOM agreements and in accordance with the Separation and Distribution Agreement, the relevant Merck entity will continue operations in the affected market on behalf of Organon, with Organon receiving all of the economic benefits and burdens of such activities. Organon began receiving these economic benefits as of June 2, 2021. Based on the terms of the IOM agreements, the Company determined it is the Principal under these arrangements. Organon holds all risks and rewards of ownership inclusive of risk of loss, market risk and benefits related to the inventory. Additionally, Organon has control in pricing, has the ability to direct Merck regarding decisions over inventory, and is responsible for all credit and collections risks and losses associated with the related receivables. As such, Organon recognizes these sales on a gross basis. As of December 31, 2025, only one jurisdiction remains under an IOM agreement.

•Manufacturing and Supply Agreements - Merck and Organon and/or their applicable affiliates entered into a number of manufacturing and supply agreements pursuant to which the relevant Merck entity (a) manufactures and supplies certain active pharmaceutical ingredients for the relevant Organon entity, (b) toll manufactures and supplies certain formulated pharmaceutical products for such Organon entity, and (c) packages and labels certain finished pharmaceutical products for such Organon entity. Similarly, the relevant Organon entity (a) manufactures and supplies certain formulated pharmaceutical products for the relevant Merck entity, and (b) packages and labels certain finished pharmaceutical products for such Merck entity. Certain of these Manufacturing and Supply Agreements have terminated or expired, including agreements that no are longer required following Organon’s acquisition of the Oss Biotech manufacturing facility in the Netherlands from Merck in July 2025.

•Tax Matters Agreement - The TMA allocates responsibility for all U.S. federal income, state and foreign income, franchise, capital gain, withholding and similar taxes, as well as all non-income taxes. The TMA also provides for cooperation between Merck and Organon with respect to tax matters, the exchange of information and the retention of records that may affect the tax liabilities of the parties to the TMA. Merck generally is responsible for any income taxes reportable on an originally filed consolidated, combined or unitary return that includes Merck or any of its subsidiaries (and Organon and/or any of its subsidiaries) for any periods or portions thereof ending on or prior to the Distribution. Organon generally is responsible for any income taxes that are reportable on originally filed returns that include only Organon and/or any of its subsidiaries, for all tax periods. Additionally, as a general matter, Merck is responsible for certain income and non-income taxes imposed as the direct result of the Separation or of an internal separation transaction. Organon is responsible for certain taxes that exclusively relate to Organon’s business and for taxes resulting from any breach of certain representations or covenants that Organon made in the TMA. Certain amounts are estimates and subject to possible adjustment in future periods.

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•Other agreements that Organon entered into with Merck include the Intellectual Property License Agreements and Regulatory Agreements.

The amounts due under such agreements were:

Sales and cost of sales resulting from the manufacturing and supply agreements with Merck were: