Filed by S&P Global Inc.

pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: IHS Markit Ltd.

Commission File No.: 001-36495

Date: December 17, 2020

The following communication is being filed in connection with the proposed merger of S&P Global Inc. and IHS Markit Ltd.

The below video script is drawn from an End-of-Year 2020 video communication sent to certain S&P Global employees by Martina Cheung, President of S&P Global Market Intelligence.

“I want to take a moment to address everyone in Market Intelligence regarding the leadership changes announced yesterday. We are in such a unique and exciting moment in our company’s history. Over the past two weeks, I joined many of you during your town halls, and I was so encouraged by the enthusiasm displayed across the MI community about the news of this merger.”

“It’s a point in time that will bring about change, but also opportunities for our business, our people and our customers. Most importantly, we’re in this incredible position thanks to all of your collective efforts. I want to reiterate how proud I am of everyone in Market Intelligence for delivering on such an incredible year. You all stepped up and challenged yourselves in ways that were previously unimaginable and helped build the foundation for our journey ahead. You have given the leadership team the utmost confidence that Market Intelligence is ready for its next chapter.”

“Yesterday, Doug [Peterson] announced a few changes to S&P Global leadership that I want to expand on. In relation to the MI Operating Committee, I want to congratulate Saugata Saha, MI’s CFO, who will lead S&P Global Platts effective January 1. Saugata has been an instrumental part of my leadership team in MI and I am thrilled for his next chapter. I’m also happy to share the news that Jason Gibson, CFO of Indices, will be taking over for Saugata as the new Chief Financial Officer for Market Intelligence and Platts. Jason brings a wealth of experience from our Index business and I look forward to welcoming him on the MI OpCo in January. With these changes already under way, I have also decided not to fill the MI Chief Operating Officer role at this time.

“I would also like to expand on updates regarding my role in the coming year. First, effective immediately until the close of the IHS merger, I will co-lead the Integration Management Office, along with Jonathan Gear, CFO of IHS Markit. My priorities in this role will be to establish the rigorous and discipline principles, processes and governance that will guide S&P Global’s decision-making from planning through delivery. The integration workstreams will comprise of nominated members from across both S&P Global and IHS Markit to help shape the new organization. I’m excited to share that Greg Gartland will lead the integration on behalf of Market Intelligence, along with a partner on the IHS side nominated by Adam Kansler.”

“Second, I am excited to share that I will also lead a new S&P Global ESG organization. This new enterprise ESG group will combine cross-divisional ESG assets, led by a leadership team who will accelerate our growth in the ESG market. I shared details earlier on my ESG leadership team. And you will hear more about our strategy and plans in January.”

“Lastly, upon close of the deal, I will move to become President of S&P Global Ratings and Adam Kansler, President of Financial Services with IHS Markit, will become the new President of Market Intelligence. I’ve had the pleasure of getting to know Adam extensively through the due-diligence process and he can’t wait to get to know everybody in Market Intelligence. Between MI and IHS Financial Services, we’ve had more than 20 years of innovation and growth. And Adam echoes my enthusiasm in the massive potential that our combined businesses will bring. You will all get to know Adam more in the coming year, but I will also share some of my thoughts on him. Adam is an incredibly thoughtful leader who very knowledgeable about our clients and the markets we serve. will be entering this role with energy and excitement and like you, he will come to this with an open mind and innovative aspirations. I will continue my role as President of MI until the deal closes and will work closely with Adam and the rest of the leadership team on a smooth transition.“

“We have a long road ahead that will bring change but also open doors to so many new opportunities. Until the deal closes, S&P Global and IHS Markit will continue to operate as two separate companies, and deliver for our respective customers, shareholders and colleagues. I’d like to reiterate how much pride I have in everything we accomplished this year. Despite the circumstances and the level of change, we maintained focused on executing for our customers. I have been so proud to lead an incredibly resilient group of people and I feel extremely confident in the future of Market Intelligence. I wish you all a happy holiday season and let’s make sure to carry our focus and momentum into 2021! Thank you.”

Forward-Looking Statements

This communication contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These forward-looking statements, which are based on current expectations, estimates and projections about future business and operating results, the industry and markets in which S&P Global Inc. (“S&P Global”) and IHS Markit Ltd. (“IHS Markit”) operate and beliefs of and assumptions made by S&P Global management and IHS Markit management, involve uncertainties that could significantly affect the financial or operating results of S&P Global, IHS Markit or the combined company. Words such as “expects,” “anticipates,” “intends,” “plans,” “believes,” “seeks,” “estimates,” “will, ” “should,” “may,” “projects,” “could,” “would,” “target,” “estimates” or variations of such words and other similar expressions are intended to identify such forward-looking statements, which generally are not historical in nature, but not all forward-looking statements include such identifying words. Such forward-looking statements include, but are not limited to, projections of earnings, statements of plans for future operations or expected revenues, statements about the benefits of the transaction involving S&P Global and IHS Markit, including future financial and operating results, the combined company’s plans, objectives, expectations and intentions. All statements that address operating performance, events or developments that we expect or anticipate will occur in the future — including statements relating to creating value for shareholders, benefits of the proposed transaction to shareholders, employees, customers and other constituents of the combined company,

the outcome of contingencies, future actions by regulators, changes in business strategies and methods of generating revenue, the development and performance of each company’s services and products, integrating our companies, cost savings, the expected timetable for completing the proposed transaction, general conditions in the geographic areas where we operate and our respective effective tax rates, cost structure, dividend policy, cash flows or liquidity — are forward-looking statements.

These statements are not guarantees of future performance and are subject to risks, uncertainties and assumptions that could cause actual results to differ materially from those expressed in such forward-looking statements. We can give no assurance that our expectations will be attained and therefore, actual outcomes and results may differ materially from what is expressed or forecasted in such forward-looking statements. For example, these forward-looking statements could be affected by factors including, without limitation, risks associated with: (i) the satisfaction of the conditions precedent to consummation of the proposed transaction, including the ability to secure regulatory approvals on the terms expected, at all or in a timely manner; (ii) the ability of S&P Global and IHS Markit to obtain shareholder approval for the proposed transaction; (iii) uncertainty relating to the impact of the proposed transaction on the businesses of S&P Global and IHS Markit, including potential adverse reactions or changes to business relationships resulting from the announcement or completion of the proposed transaction and changes to existing business relationships during the pendency of the acquisition that could affect S&P Global’s and/or IHS Markit’s financial performance; (iv) the ability of S&P Global to successfully integrate IHS Markit’s operations and retain and hire key personnel; (v) the ability of S&P Global to implement its plans, forecasts and other expectations with respect to IHS Markit’s business after the consummation of the proposed transaction and realize expected synergies; (vi) business disruption following the proposed transaction; (vii) economic, financial, political and regulatory conditions, in the United States and elsewhere, and other factors that contribute to uncertainty and volatility, including the upcoming U.S. presidential transition, the United Kingdom’s withdrawal from the European Union, natural and man-made disasters, civil unrest, pandemics (e.g., the coronavirus (COVID-19) pandemic (the “COVID-19 pandemic”)), geopolitical uncertainty, and conditions that may result from legislative, regulatory, trade and policy changes associated with the current or subsequent U.S. administration; (viii) the ability of S&P Global and IHS Markit to successfully recover from a disaster or other business continuity problem due to a hurricane, flood, earthquake, terrorist attack, war, pandemic, security breach, cyber -attack, power loss, telecommunications failure or other natural or man-made event, including the ability to function remotely during long-term disruptions such as the COVID-19 pandemic; (ix) the impact of public health crises, such as pandemics (including the COVID-19 pandemic) and epidemics and any related company or governmental policies and actions to protect the health and safety of individuals or governmental policies or actions to maintain the functioning of national or global economies and markets, including any quarantine, “shelter in place,” “stay at home,” workforce reduction, social distancing, shut down or similar actions and policies; (x) the outcome of any potential litigation, government and regulatory proceedings, investigations and inquiries; (xi) changes in debt and equity markets, including credit quality and spreads; (xii) demand for investment products that track indices and assessments, and trading volumes of certain exchange-traded derivatives; (xiii) changes in financial markets, capital, credit and commodities markets and interest rates; (xiv) the possibility that the transaction may be more expensive to complete than anticipated, including as a result of unexpected factors or events; (xv) the parties’ ability to meet expectations regarding the accounting and tax treatments of the proposed transaction; and (xvi) those additional risks and factors discussed in reports filed with the Securities and Exchange Commission (the

“SEC”) by S&P Global and IHS Markit from time to time, including those discussed under the heading “Risk Factors” in their respective most recently filed Annual Reports on Form 10-K and subsequent Quarterly Reports on Form 10-Q. While the list of factors presented here is considered representative, this list should not be considered to be a complete statement of all potential risks and uncertainties. Unlisted factors may present significant additional obstacles to the realization of forward-looking statements. Consequences of material differences in results as compared with those anticipated in the forward-looking statements could include, among other things, business disruption, operational problems, financial loss, legal liability to third parties and similar risks, any of which could have a material adverse effect on S&P Global’s or IHS Markit’s consolidated financial condition, results of operations, credit rating or liquidity. Except to the extent required by applicable law or regulation, each of S&P Global and IHS Markit disclaims any duty to update any forward-looking statements contained in this communication or to otherwise update any of the above-referenced factors.

No Offer or Solicitation

This communication is not intended to and shall not constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote of approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Important Information About the Transaction and Where to Find It

In connection with the proposed transaction, S&P Global and IHS Markit will file relevant materials with the SEC, including a registration statement on Form S-4 filed by S&P Global to register the shares of S&P Global common stock to be issued in connection with the proposed transaction. The registration statement will include a joint proxy statement/prospectus which will be sent to the shareholders of S&P Global and IHS Markit seeking their approval of their respective transaction-related proposals. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT ON FORM S-4 AND THE RELATED JOINT PROXY STATEMENT/PROSPECTUS, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS AND ANY OTHER RELEVANT DOCUMENTS THAT ARE FILED OR TO BE FILED WITH THE SEC IN CONNECTION WITH THE PROPOSED TRANSACTION, CAREFULLY AND IN THEIR ENTIRETY BECAUSE THEY CONTAIN OR WILL CONTAIN IMPORTANT INFORMATION ABOUT S&P GLOBAL, IHS MARKIT AND THE PROPOSED TRANSACTION.

Investors and security holders may obtain copies of these documents free of charge through the website maintained by the SEC at www.sec.gov or from S&P Global at its website, or from IHS Markit at its website. Documents filed with the SEC by S&P Global will be available free of charge by accessing S&P Global’s website at www.spglobal.com under the heading Investor Relations, or, alternatively, by directing a request by telephone to 866-436-8502 (domestic callers) or 212-438-2192 (international callers) or by mail to S&P Global at Investor Relations, S&P Global Inc., 55 Water Street, New York, NY 10041, and documents filed with the SEC by IHS Markit will be available free of charge by accessing IHS Markit’s website at www.ihsmarkit.com under the heading Investor Relations or, alternatively, by directing a request by telephone to 303-790-0600 or by mail to IHS Markit at IHS Markit Investor Relations and Corporate Communications, 15 Inverness Way East, Englewood, CO 80112.

Participants in the Solicitation

S&P Global, IHS Markit and certain of their respective directors and executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies from the shareholders of S&P Global and IHS Markit in respect of the proposed transaction under the rules of the SEC. Information about IHS Markit’s directors and executive officers is available in IHS Markit’s Form 10-K for the year ended November 30, 2019, proxy statement dated February 28, 2020 for its 2020 Annual General Meeting of Shareholders, and certain of its Current Reports on Form 8-K. Information about S&P Global’s directors and executive officers is available in S&P Global’s Form 10-K for the year ended December 31, 2019, proxy statement dated March 30, 2020 for its 2020 Annual Meeting of Shareholders, and certain of its Current Reports on Form 8-K. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the joint proxy statement/prospectus and other relevant materials to be filed with the SEC regarding the transaction when they become available. Investors should read the joint proxy statement/prospectus carefully when it becomes available before making any voting or investment decisions. You may obtain free copies of these documents from S&P Global or IHS Markit using the sources indicated above.