Table of Contents cash funding obligations (or the timing of such contributions) could have a material adverse effect on our cash flows, credit rating, cost of borrowing, financial position and/or results of operations. For example, following the completion of the triennial review of the U.K. pension plan with the plan's trustees in 2014, we made a GBP 150 million contribution to our U.K. pension plan in January 2015, based on the underfunded status of the plan and the evaluation of the plan's performance and long-term obligations. In addition, we made pension plan contributions during 2017 of approximately $310 million, including $200 million of discretionary contributions to the U.S. pension plan. We depend on key personnel, the loss of whom could harm our business.  The loss of the services and expertise of any key employee could harm our business. Our future success depends on our ability to identify, attract and retain qualified personnel on a timely basis. Turnover of senior management can adversely impact our stock price, our results of operations and our client relationships and may make recruiting for future management positions more difficult. In addition, we must successfully integrate any new management personnel that we hire within our organization, or who join our organization as a result of an acquisition, in order to achieve our operating objectives, and changes in other key management positions may temporarily affect our financial performance and results of operations as new management becomes familiar with our business. Due to a high concentration of workers represented by unions or trade councils in Canada, Europe, and the U.S., we could be significantly affected by labor strikes, work stoppages or other employee-related issues. As of December 31, 2018, approximately 50%, 35%, and 30% of our Canadian, European and U.S. workforces, respectively, are represented by trade unions or councils. Stringent labor laws in certain of our key markets expose us to a greater risk of loss should we experience labor disruptions in those markets. A prolonged labor strike, work stoppage or other employee-related issue, could have a material adverse effect on our business and financial results. For example, in the first quarter of 2017, our Toronto brewery unionized employees commenced a labor strike initiated from on-going negotiations of the collective bargaining agreement. This labor strike resulted in slower than expected production at the Toronto brewery in the first quarter of 2017. From time to time, our collective bargaining agreements come due for renegotiation, and, if we are unable to timely complete negotiations, affected employees may strike, which could have an adverse effect on our business and financial results. Because of our reliance on third-party service providers and internal and outsourced systems for our information technology and certain other administrative functions, we could experience a disruption to our business. We rely extensively on information services providers worldwide for our information technology functions including network, help desk, hardware and software configuration. Additionally, we rely on internal networks and information systems and other technology, including the internet and third-party hosted services, to support a variety of business processes and activities, including procurement and supply chain, manufacturing, distribution, invoicing and collection of payments. We use information systems for certain human resource activities and to process our employee benefits, as well as to process financial information for internal and external reporting purposes and to comply with various reporting, legal and tax requirements. As information systems are critical to many of our operating activities, our business may be impacted by system shutdowns, service disruptions, obsolescence, or security breaches. Additionally, if one of our service providers were to fail and we were unable to find a suitable replacement in a timely manner, we could be unable to properly administer our outsourced functions. A breach of our information systems could cause material financial or reputational harm.  Our internal and outsourced systems may also be the target of cyber-attacks or other breaches to our security, which, if successful, could expose us to the loss of key business, employee, customer or vendor information and disruption of our operations. If our information systems suffer severe damage, disruption or shutdown, we could experience delays in reporting our financial results and we may lose revenue and profits as a result of our inability to timely prepare, distribute, invoice and collect payments from our customers. Misuse, leakage or falsification of information could result in a violation of data privacy laws and regulations, such as the European Union's General Data Protection Regulation, or damage our reputation and credibility. In addition, we may suffer financial and reputational damage because of lost or misappropriated confidential information and may become subject to legal action and increased regulatory oversight or consumers may avoid our brands due to negative publicity. We could also be required to spend significant financial and other resources to remedy the damage caused by a security breach or to repair or replace networks and information systems, which could have a material adverse effect on our business and financial results. If the Pentland Trust and the Coors Trust do not agree on a matter submitted to our stockholders or if a super-majority of our board of directors do not agree on certain actions, generally the matter will not be approved, even if beneficial to us or favored by other stockholders or a majority of our board of directors. Pentland Securities (1981) Inc. (the "Pentland Trust") (a company controlled by the Molson family and related parties) and the Adolph Coors, Jr. Trust (the "Coors Trust"), which together control more than 90% of our Class A common stock and Class A exchangeable shares, have a voting trust agreement through which they have combined their voting power over the shares of our Class A common stock and the Class A exchangeable shares that they own. If these two stockholders do not agree to vote in favor of a matter submitted to a stockholder vote (other than the election of directors), the voting trustees are required to vote all of the Class A common stock 28