Filed by J1 Holdings Inc.

Pursuant to Rule 425 under the Securities Act of 1933,

as amended, and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934, as amended

Subject Company: Altimeter Growth Corp.

Commission File No.: 001-39573

CEO Email to Grabbers

Dear Grabbers,

From MyTeksi to GrabTaxi and now Grab, we’ve been on an incredible journey together. Today, we embark on yet another chapter of our journey as we take our first step towards going public.

Why now?

We’ve always said that we’ll become a publicly traded company when we’re ready, and that we’ll act in the best interest of our partners, community, Grabbers and stakeholders. We believe the time is now. We’ve found a great partner in Altimeter, a leading technology and growth investor. Like us, they are excited about Grab’s mission and what we are building in Southeast Asia. Coupled with their track record in backing iconic tech companies like Alibaba, Airbnb, Booking.com, Facebook, Roblox and Snowflake, there’s no better partner we can ask for in going public with.

It’s extremely humbling that this is expected to be the largest-ever equity offering in the U.S. for a Southeast Asian company. On our investor bench, we are also thankful to have the support of prominent tech and growth investors such as funds and accounts managed or advised by Blackrock, Counterpoint Global (Morgan Stanley), Fidelity International, Fidelity Management and Research LLC, Janus Henderson Investors, Nuveen and T.Rowe Price Associates, Inc., and even three sovereign wealth funds such as Mubadala, Permodalan Nasional Berhad and Temasek.

As we now step up to the world stage, we remain firmly committed to creating economic empowerment for everyone in Southeast Asia. As a further mark of that commitment, we’ve launched the GrabForGood Fund—an endowment fund seeded with an initial funding of US$275 million in cash and Grab shares. This fund will enable our partners and communities to share in and benefit from our continued growth and long term success.

You made this possible.

In under a decade, we’ve transformed a single-city mobility company into Southeast Asia’s leading superapp, changed how people move, eat, pay, invest, and so much more, all across the region, and enabled millions of driver-, delivery-, merchant-, and agent-partners to earn a living. None of this would have been possible without each and every one of you. The progress we’ve made thus far, and the recognition we are receiving is testament to the great work and stellar execution of this amazing OneGrab team.

We’re just getting started.

While this first major step to become a publicly traded company is an important milestone that should be celebrated, it comes with new potential distractions that we need to learn how to manage going forward—news on our plans to go public, the company’s valuation and eventually, the inevitable up AND down fluctuations of our stock price. These short term considerations must not distract us from our longer term mission. We’re just touching the tip of the iceberg in terms of the impact we can and will make on Southeast Asia. So let’s maintain our Day 1 mentality and stay laser focused on outserving our stakeholders with Heart, Honour, Hunger and Humility!

The immediate road ahead.

There’s still a lot of work to be done before we can ring the NASDAQ bell in Q3 2021. My ask of every Grabber is to keep up the great work and focused execution of our mission in accordance with the Grab Way. Additionally, please take very seriously all the new policies, protocols and training we will be rolling out for all of us as we prepare to transition into life as a public company, starting with the communications guidelines attached. We’ve organised a global All Hands tomorrow, 14 Apr, 11.30am SGT, where we will share more details too. Look forward to seeing, and celebrating this announcement with you!

Godspeed,

Anthony

Forward-Looking Statements

This document includes “forward-looking statements” within the meaning of the federal securities laws with respect to the proposed transaction between Grab Holdings Inc. (“Grab”), J1 Holdings Inc. (“PubCo”) and Altimeter Growth Corp. (“AGC”), and also contains certain financial forecasts and projections. All statements other than statements of historical fact contained in this document, including, but not limited to, statements as to future results of operations and financial position, planned products and services, business strategy and plans, objectives of management for future operations of Grab, market size and growth opportunities, competitive position, technological and market trends and the potential benefits and expectations related to the terms and timing of the proposed transactions, are forward-looking statements. Some of these forward-looking statements can be identified by the use of forward-looking words, including “anticipate,” “expect,” “suggests,” “plan,” “believe,” “intend,” “estimates,” “targets,” “projects,” “should,” “could,” “would,” “may,” “will,” “forecast” or other similar expressions. All forward-looking statements are based upon estimates and forecasts and reflect the views, assumptions, expectations, and opinions of AGC and Grab, which are all subject change due to various factors including, without limitation, changes in general economic conditions as a result of COVID-19. Any such estimates, assumptions, expectations, forecasts, views or opinions, whether or not identified in this document, should be regarded as indicative, preliminary and for illustrative purposes only and should not be relied upon as being necessarily indicative of future results.

The forward-looking statements and financial forecasts and projections contained in this document are subject to a number of factors, risks and uncertainties. Potential risks and uncertainties that could cause the actual results to differ materially from those expressed or implied by forward-looking statements include, but are not limited to, changes in domestic and foreign business, market, financial, political and legal conditions; the timing and structure of the business combination; changes to the proposed structure of the business combination that may be required or appropriate as a result of applicable laws or regulations; the inability of the parties to successfully or timely consummate the business combination, the PIPE investment and other transactions in connection therewith, including as a result of the COVID-19 pandemic or the risk that any regulatory approvals are not obtained, are delayed or are subject to unanticipated conditions that could adversely affect the combined company or the expected benefits of the business combination or that the approval of the shareholders of AGC or Grab is not obtained; the risk that the business combination disrupts current plans and operations of AGC or Grab as a result of the announcement and consummation of the business combination; the ability of Grab to grow and manage growth profitably and retain its key employees including its chief executive officer and executive team; the inability to obtain or maintain the listing of the post-acquisition company’s securities on Nasdaq following the business combination; failure to realize the anticipated benefits of business combination; risk relating to the uncertainty of the projected financial information with respect to Grab; the amount of redemption requests made by AGC’s shareholders and the amount of funds available in the AGC trust account; the overall level of demand for Grab’s services; general economic conditions and other factors affecting Grab’s business; Grab’s ability to implement its business strategy; Grab’s ability to manage expenses; changes in applicable laws and governmental regulation and the impact of such changes on Grab’s business, Grab’s exposure to litigation claims and other loss contingencies; the risks associated with negative press or reputational harm; disruptions and other impacts to Grab’s business, as a result of the COVID-19 pandemic and government actions and restrictive measures implemented in response; Grab’s ability to protect patents, trademarks and other intellectual property rights; any breaches of, or interruptions in, Grab’s technology infrastructure; changes in tax laws and liabilities; and changes in legal, regulatory, political and economic risks and the impact of such changes on Grab’s business. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of PubCo’s registration statement on Form F-4, the proxy statement/consent solicitation statement/prospectus discussed below, AGC’s Quarterly Report on Form 10-Q and other documents filed by PubCo or AGC from time to time with the U.S. Securities and Exchange Commission (the “SEC”). These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. In addition, there may be additional risks that neither AGC nor Grab presently know, or that AGC or Grab currently believe are immaterial, that could also cause actual results to differ from those contained in the forward-looking statements. Forward-looking statements reflect AGC’s and Grab’s expectations, plans, projections or forecasts of future events and view. If any of the risks materialize or AGC’s or Grab’s assumptions prove incorrect, actual results could differ materially from the results implied by these forward-looking statements.

Forward-looking statements speak only as of the date they are made. AGC and Grab anticipate that subsequent events and developments may cause their assessments to change. However, while PubCo, AGC and Grab may elect to update these forward-looking statements at some point in the future, PubCo, AGC and Grab specifically disclaim any obligation to do so, except as required by law. The inclusion of any statement in this document does not constitute an admission by Grab nor AGC or any other person that the events or circumstances described in such statement are material. These forward-looking statements should not be relied upon as representing AGC’s or Grab’s assessments as of any date subsequent to the date of this document. Accordingly, undue reliance should not be placed upon the forward-looking statements. In addition, the analyses of Grab and AGC contained herein are not, and do not purport to be, appraisals of the securities, assets or business of the Grab, AGC or any other entity.

Non-IFRS Financial Measures

This document may also include references to non-IFRS financial measures. Such non-IFRS measures should be considered only as supplemental to, and not as superior to, financial measures prepared in accordance with IFRS, and such non-IFRS measures may be different from non-IFRS financial measures used by other companies.

Important Information About the Proposed Transactions and Where to Find It

This document relates to a proposed transaction between Grab and AGC. This document does not constitute an offer to sell or exchange, or the solicitation of an offer to buy or exchange, any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, sale or exchange would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. The proposed transactions will be submitted to shareholders of AGC for their consideration.

PubCo intends to file a registration statement on Form F-4 (the “Registration Statement”) with the SEC which will include preliminary and definitive proxy statements to be distributed to AGC’s shareholders in connection with AGC’s solicitation for proxies for the vote by AGC’s shareholders in connection with the proposed transactions and other matters as described in the Registration Statement, as well as the prospectus relating to the offer of the securities to be issued to Grab’s shareholders in connection with the completion of the proposed business combination. AGC and PubCo also will file other documents regarding the proposed transaction with the SEC.

After the Registration Statement has been filed and declared effective, AGC will mail a definitive proxy statement and other relevant documents to its shareholders as of the record date established for voting on the proposed transactions. This communication is not a substitute for the Registration Statement, the definitive proxy statement/prospectus or any other document that AGC will send to its shareholders in connection with the business combination. AGC’s shareholders and other interested persons are advised to read, once available, the preliminary proxy statement/prospectus and any amendments thereto and, once available, the definitive proxy statement/prospectus, in connection with AGC’s solicitation of proxies for its special meeting of shareholders to be held to approve, among other things, the proposed transactions, because these documents will contain important information about AGC, PubCo, Grab and the proposed transactions. Shareholders and investors may also obtain a copy of the preliminary or definitive proxy statement, once available, as well as other documents filed with the SEC regarding the proposed transactions and other documents filed with the SEC by AGC, without charge, at the SEC’s website located at www.sec.gov or by directing a request to AGC. The information contained on, or that may be accessed through, the websites referenced in this document is not incorporated by reference into, and is not a part of, this document.

INVESTMENT IN ANY SECURITIES DESCRIBED HEREIN HAS NOT BEEN APPROVED OR DISAPPROVED BY THE SEC OR ANY OTHER REGULATORY AUTHORITY NOR HAS ANY AUTHORITY PASSED UPON OR ENDORSED THE MERITS OF THE OFFERING OR THE ACCURACY OR ADEQUACY OF THE INFORMATION CONTAINED HEREIN. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

Participants in the Solicitation

AGC, PubCo and Grab and certain of their respective directors, executive officers and other members of management and employees may, under SEC rules, be deemed to be participants in the solicitations of proxies from AGC’s shareholders in connection with the proposed transactions. Information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of AGC’s shareholders in connection with the proposed transactions will be set forth in PubCo’s proxy statement/prospectus when it is filed with the SEC. You can find more information about AGC’s directors and executive officers in AGC’s final prospectus filed with the SEC on September 30, 2020. Additional information regarding the participants in the proxy solicitation and a description of their direct and indirect interests will be included in the proxy statement/prospectus when it becomes available. Shareholders, potential investors and other interested persons should read the proxy statement/prospectus carefully when it becomes available before making any voting or investment decisions. You may obtain free copies of these documents from the sources indicated above.

No Offer or Solicitation

This document is for informational purposes only and shall not constitute an offer to sell or the solicitation of an offer to buy any securities pursuant to the proposed transactions or otherwise, nor shall there be any sale of securities in any jurisdiction in which the offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such jurisdiction. No offer 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.