Pension and other postretirement benefit obligations may materially impact our earnings, stockholders’ equity and cash flows from operations, and could have significant adverse impacts in future periods.
We maintain defined benefit pension and other postretirement benefits plans for some of our employees. Potential pension contributions include discretionary contributions to improve the plans’ funded status. The extent of future contributions depends heavily on market factors such as the discount rate and the actual return on plan assets. We estimate future contributions to these plans using assumptions with respect to these and other items. Changes to those assumptions could have a significant effect on future contributions, annual pension and other postretirement costs, the value of plan assets and our benefit obligations.
Significant changes in actual return on pension assets, discount rates, and other factors could adversely affect our results of operations and require cash pension contributions in future periods. Changes in discount rates and actual asset returns different than our expected asset returns can result in significant non-cash actuarial gains or losses which we record in the fourth quarter of each fiscal year and, if applicable, in any quarter in which an interim re-measurement is triggered. With regard to cash pension contributions, funding requirements for our pension plans are largely dependent upon interest rates, actual investment returns on pension assets and the impact of legislative or regulatory changes related to pension funding obligations.
We also provide other postretirement benefits to certain of our employees, consisting principally of health care, dental and life insurance for eligible retirees and qualifying dependents. Our estimates of future costs associated with these benefits are also subject to assumptions, including estimates of the level of medical cost increases and discount rates.
For a discussion regarding how our financial statements can be affected by pension and other postretirement plan accounting policies, see Part II, Item 7, “Management's Discussion and Analysis—Critical Accounting Policies and Estimates—Pension and Other Postretirement Benefits” in our Annual Report on Form 10-K for the year ended December 31, 2018.
We are a party to legal proceedings, investigations and other claims or disputes, which are costly to defend and, if determined adversely to us, could require us to pay fines or damages, undertake remedial measures or prevent us from taking certain actions, any of which could adversely affect our business.
We are, and in the future may be, a party to legal proceedings, investigations and other claims or disputes, which may relate to subjects including commercial transactions, intellectual property, securities, employee relations, or compliance with applicable laws and regulations.
For instance, we are currently defending against a claim in arbitration that we improperly terminated a contract with a Ukrainian customer in response to the force majeure event caused by the annexation of Crimea, and seeking recovery from us in the amount of approximately $227 million. This matter is scheduled to be heard by the arbitration panel in December 2019. In addition, in January 2019, a Maxar stockholder filed a putative class action lawsuit in the Federal District Court of Colorado, naming Maxar and members of management as defendants alleging, among other things, that our public disclosures were false or misleading in violation of the Securities and Exchange Act of 1934 and seeking monetary damages. An amended consolidated complaint was filed in that case in October 2019. Also in January 2019, a Maxar stockholder resident in Canada issued a putative class action lawsuit in the Ontario Superior Court of Justice against Maxar and members of management claiming misrepresentations in Maxar’s public disclosures and seeking monetary damages under Canadian securities laws. In October 2019, a Maxar stockholder filed a putative class action lawsuit in California state court, naming Maxar and certain members of management and the board of directors as defendants. The lawsuit is based upon many of the same underlying factual allegations as the federal putative class action, but asserts claims under the Securities Act of 1933.
These legal proceedings could result in substantial costs and diversion of management’s attention and resources and could harm our stock price, business, prospects, results of operations and financial condition. These and other legal proceedings and investigations are inherently uncertain and we cannot predict their duration, scope, outcome or consequences. There can be no assurance that these or any such matters that have been or may in the future be brought against us will be resolved favorably. In connection with any government investigations, in the event the government