X0202 SCHEDULE 13D 0001017645 XXXXXXXX LIVE Common stock, par value $0.0001 per share 06/05/2026 false 0001850351 53229X101 Liftoff Mobile, Inc.

900 MIDDLEFIELD ROAD REDWOOD CITY CA 94063

Michael Gosk (212) 715-4000 c/o General Atlantic Service Company, LP 55 East 52nd Street, 33rd Floor New York NY 10055 0001017645 N GENERAL ATLANTIC, L.P. b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y General Atlantic (SPV) GP, LLC b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 OO Y General Atlantic Partners 100, L.P. b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y General Atlantic (LFT), L.P. b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y General Atlantic Partners (Lux) SCSp b OO N N4 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y General Atlantic GenPar, L.P. b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y GAP Coinvestments III, LLC b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 OO Y GAP Coinvestments IV, LLC b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 OO Y GAP Coinvestments V, LLC b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 OO Y GAP Coinvestments CDA, L.P. b OO N DE 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y General Atlantic GenPar (Lux) SCSp b OO N N4 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y General Atlantic (Lux) S.a r.l. b OO N N4 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 HC Y General Atlantic GenPar (Bermuda), L.P. b OO N D0 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Y GAP (Bermuda) L.P. b OO N D0 0.00 25315646.00 0.00 25315646.00 25315646.00 N 15.0 PN Common stock, par value $0.0001 per share Liftoff Mobile, Inc. 900 MIDDLEFIELD ROAD REDWOOD CITY CA 94063 This Schedule 13D (this "Statement") relates to the beneficial ownership of the Reporting Persons (defined below) of the common stock, par value $0.0001 per share (the "common stock") of Liftoff Mobile, Inc., a company incorporated in Delaware (the "Company"), whose principal executive offices are located at 900 Middlefield Road, Redwood City, CA 94063. The Reporting Persons were initially eligible to file a Schedule 13G under Rule 13d-1(d) of the Exchange Act. On June 5, 2026, the Reporting Persons acquired shares of the Company's common stock in connection with the Company's initial public offering (the "IPO"). These shares of common stock, together with all other acquisitions by the Reporting Persons of shares of common stock during the preceding twelve months, exceed 2 percent of the outstanding shares of common stock. Therefore, the Reporting Persons are no longer eligible to file a Schedule 13G under Rule 13d-1(d) and are now filing this Statement. This Statement is being filed by a "group," as defined in Rule 13d-5 of the General Rules and Regulations promulgated under the Exchange Act. The members of the group are: (i) General Atlantic, L.P., a Delaware limited partnership ("GA LP"); (ii) General Atlantic (SPV) GP, LLC, a Delaware limited liability corporation ("GA SPV"); (iii) General Atlantic Partners 100, L.P., a Delaware limited partnership ("GAP 100"); (iv) General Atlantic (LFT), L.P., a Delaware limited partnership ("GA LFT"); (v) General Atlantic Partners (Lux), SCSp, a Luxembourg special limited partnership ("GAP Lux"); (vi) General Atlantic GenPar, L.P., a Delaware limited partnership ("GA GenPar"); (vii) GAP Coinvestments III, LLC, a Delaware limited liability corporation ("GAPCO III"); (viii) GAP Coinvestments IV, LLC, a Delaware limited liability corporation ("GAPCO IV"); (ix) GAP Coinvestments V, LLC, a Delaware limited liability corporation ("GAPCO V"); (x) GAP Coinvestments CDA, L.P., a Delaware limited partnership ("GAPCO CDA"); (xi) General Atlantic GenPar (Lux), SCSp, a Luxembourg special limited partnership ("GA GenPar Lux"); (xii) General Atlantic (Lux) S.a r.l., a Luxembourg company ("GA Lux"); (xiii) General Atlantic GenPar (Bermuda), L.P., a Bermuda limited partnership ("GenPar Bermuda"); and (xiv) GAP (Bermuda) L.P., a Bermuda limited partnership ("GAP Bermuda"). Each of the foregoing is referred to as a Reporting Person and collectively as the "Reporting Persons." GAP 100 and GAP Lux are collectively referred to as the "GA Funds." GAPCO III, GAPCO IV, GAPCO V and GAPCO CDA are collectively referred to as the "Sponsor Coinvestment Funds." The address of GenPar Bermuda and GAP Bermuda is Clarendon House, 2 Church Street, Hamilton HM 11, Bermuda. The address of GAP Lux, GA GenPar Lux and GA Lux is 412F, Route d'Esch, L-1471 Luxembourg. The address of GAP 100, GA SPV, GA GenPar, GA LFT and GA LP and each of the Sponsor Coinvestment Funds is c/o General Atlantic Service Company, L.P., 55 East 52nd Street, 33rd Floor, New York, NY 10055. Each of the Reporting Persons is engaged in acquiring, holding and disposing of interests in various companies for investment purposes. The following investment funds share beneficial ownership of the common stock held of record by GA LFT: the GA Funds and the Sponsor Coinvestment Funds. The general partner of GAP 100 is GA GenPar. GA LP, which is controlled by the Partnership Committee of GASC MGP, LLC (the "Partnership Committee"), is the managing member of GAPCO III, GAPCO IV, and GAPCO V, the general partner of GAPCO CDA and GA GenPar, and is the sole member of GA SPV. The general partner of GA LFT is GA SPV. The general partner of GAP Lux is GA GenPar Lux, and the general partner of GA GenPar Lux is GA Lux. The sole shareholder of GA Lux is GenPar Bermuda. GAP Bermuda, which is ultimately controlled by the Partnership Committee, is the general partner of GenPar Bermuda. As of the date hereof, there are six members of the Partnership Committee. Each of the members of the Partnership Committee disclaims ownership of the shares except to the extent that he has a pecuniary interest therein. The information required by General Instruction C to Schedule 13D is attached hereto as Schedule A and is hereby incorporated by reference. The present principal occupation or employment of each of the members of the Partnership Committee is as a managing director of GA LP. See Item 2(a). See Item 2(a). None of the Reporting Persons and none of the individuals listed on Schedule A have, during the last five years, been (i) convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors) or (ii) a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws. See Item 2(d). See Item 2(a). In connection with the pricing of the IPO on June 3, 2026, 425,000 shares of Series A Redeemable Convertible Preferred Stock of the Company held directly by GA LFT converted into 24,011,299 shares of common stock. In addition, GA LFT purchased 1,304,347 shares of common stock on June 5, 2026 at a price of $23.00 per share in the IPO. The funds to purchase the shares of common stock were obtained from contributions from the GA Funds and Sponsor Coinvestment Funds. The Reporting Persons acquired the common stock reported herein for investment purposes. Consistent with such purposes, the Reporting Persons may engage in communications with, without limitation, one or more shareholders of the Company, management of the Company, one or more members of the board of directors of the Company, and may make suggestions concerning the Company's operations, prospects, business and financial strategies, strategic transactions, assets and liabilities, business and financing alternatives, the composition of the board of directors of the Company and such other matters as the Reporting Persons may deem relevant to their investment in the common stock. The Reporting Persons expect that they will, from time to time, review their investment position in the common stock or the Company and may, depending on the Company's performance and other market conditions, increase or decrease their investment position in the common stock. The Reporting Persons may, from time to time, make additional purchases of common stock either in the open market or in privately-negotiated transactions, depending upon the Reporting Persons' evaluation of the Company's business, prospects and financial condition, the market for the common stock, other opportunities available to the Reporting Persons, general economic conditions, stock market conditions and other factors. Depending upon the factors noted above, the Reporting Persons may also decide to hold or dispose of all or part of their investments in the common stock and/or enter into derivative transactions with institutional counterparties with respect to the Company's securities, including the common stock. Except as set forth in this Item 4 or Item 6 below, the Reporting Persons have no present plans or proposals that relate to, or that would result in, any of the actions specified in clauses (a) through (j) of Item 4 of Schedule 13D of the Exchange Act. The percentages used herein are calculated based on an aggregate of 169,330,527 shares of common stock reported by the Company to be outstanding as reflected in the Company's prospectus filed under Rule 424(b)(4) filed with the U.S. Securities and Exchange Commission (the "SEC") on June 4, 2026, after giving effect to the IPO (including the exercise in full of the underwriters' over-allotment option as announced by the Company on June 5, 2026). By virtue of the fact that (i) the GA Funds and the Sponsor Coinvestment Funds contributed the capital to fund the purchases, and share beneficial ownership of, the common stock held of record by GA LFT, (ii) the general partner of GA LFT is GA SPV, (iii) the general partner of GAP Lux is GA GenPar Lux, and the general partner of GA GenPar Lux is GA Lux., (iv) the sole shareholder of GA Lux is GenPar Bermuda, (v) GAP Lux has appointed Carne Global Fund Management (Luxembourg) S.A. (the "AIFM") as the alternative investment fund manager of GAP Lux pursuant to an alternative investment fund management agreement to undertake all functions required of an external alternative investment fund manager under the Luxembourg law of 12 July 2013 on alternative investment fund managers, as amended from time to time and GAP Lux has also entered into a delegated portfolio management and distribution agreement with the AIFM and GASC MGP, LLC ("GASC") in order to appoint GASC to act as the portfolio manager of GAP Lux, (vi) the general partner of GAP 100 is GA GenPar, and the general partner of GA GenPar is GA LP, (vii) GA LP, which is controlled by the Partnership Committee, is the managing member of GAPCO III, GAPCO IV, and GAPCO V, the general partner of GAPCO CDA, and is the sole member of GA SPV, (viii) GAP Bermuda, which is ultimately controlled by the Partnership Committee, is the general partner of GenPar Bermuda and (ix) GASC, with respect to GAP Lux, is controlled by the Partnership Committee, the Reporting Persons may be deemed to have the power to vote and direct the disposition of the common stock owned of record by GA LFT. As a result, as of the date hereof, each of the Reporting Persons may be deemed to beneficially own the shares of common stock indicated on row (11) on such Reporting Person's cover page included herein. Each of the Reporting Persons has the shared power to vote or direct the vote and the shared power to dispose or to direct the disposition of the shares of common stock indicated on row (8) on such Reporting Person's cover page that may be deemed to be beneficially owned by each of them. Except as set forth in Item 3, or otherwise herein, to the knowledge of the Reporting Persons with respect to the persons named in response to Item 5(a), none of the persons named in response to Item 5(a) has effected any transactions during the past 60 days. No person other than the persons listed is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, any securities owned by any member of the group. Not applicable. Please see Item 5(a), which is hereby incorporated by reference. The GA Funds, the Sponsor Coinvestment Funds and the members of the Partnership Committee may, from time to time, consult among themselves and coordinate the voting and disposition of shares of common stock held of record by GA LFT as well as such other action taken on behalf of the Reporting Persons with respect to the common stock held by the Reporting Persons as they deem to be in the collective interest of the Reporting Persons. The Reporting Persons entered into a Joint Filing Agreement on June 12, 2026 (the "Joint Filing Agreement"), pursuant to which they have agreed to file this Statement jointly in accordance with the provisions of Rule 13d-1(k)(1) under the Exchange Act. A copy of the Joint Filing Agreement is attached hereto as Exhibit 1. In connection with the IPO, the Company, GA LFT and the other stockholders of the Company named therein entered into that certain Registration Rights Agreement (the "Registration Rights Agreement"), dated as of June 3, 2026. The Registration Rights Agreement grants the Reporting Persons certain customary demand registration and piggyback registration rights with respect to shares of common stock, in each case subject to the terms and conditions of the Registration Rights Agreement. The foregoing description of the Registration Rights Agreement does not purport to be complete and is qualified in its entirety by reference to the Registration Rights Agreement. A copy of the Registration Rights Agreement is filed as Exhibit 2 hereto and is incorporated herein by reference. In addition, GA LFT entered into a customary lock-up agreement with the underwriters in the IPO (the "Lock-Up Agreement"), pursuant to which it agreed, subject to specified exceptions, not to offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose of any shares of common stock, or any options or warrants to purchase any shares of common stock, or any securities convertible into, exchangeable for or that represent the right to receive shares of common stock, whether now owned or hereinafter acquired, owned directly by GA LFT (including holding as a custodian) or with respect to which GA LFT has beneficial ownership within the rules and regulations of the SEC, for a period commencing on February 5, 2026 and ending 180 days after June 3, 2026, the date of the final prospectus with respect to the IPO. The foregoing description of the Lock-Up Agreement does not purport to be complete and is qualified in its entirety by reference to the Lock-Up Agreement. A copy of the Lock-Up Agreement is filed as Exhibit 3 hereto and is incorporated herein by reference. Further, in connection with the IPO, the Company and GA LFT entered into that certain Stockholders Agreement (the "Stockholders Agreement"), dated as of June 3, 2026. The Stockholders Agreement grants the Reporting Persons certain governance rights, including the right to designate one (1) individual as a director to the Company's board of directors if GA LP and its affiliates beneficially own at least 5% of the outstanding shares of common stock. In addition, if GA LP and its affiliates together beneficially own at least 2% of the outstanding shares of common stock, GA LP and its affiliates will have the right to appoint a non-voting observer to attend meetings of the Company's board of directors. Although General Atlantic may be permitted to designate a director pursuant to the foregoing provisions, there is no requirement that General Atlantic designate such director. Such director may be removed only with the consent of General Atlantic. General Atlantic has certain customary information rights pursuant to the Stockholders Agreement. The foregoing description of the Stockholders Agreement does not purport to be complete and is qualified in its entirety by reference to the Stockholders Agreement. A copy of the Stockholders Agreement is filed as Exhibit 4 hereto and is incorporated herein by reference. Except as described above, there are no contracts, arrangements, understandings or relationships (legal or otherwise) between the Reporting Persons or, to the best of their knowledge, any of the persons named in Schedule A hereto and any other person with respect to any securities of the Company, including, but not limited to, transfer or voting of any securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or losses, or the giving or withholding of proxies. Exhibit 1: Agreement relating to the filing of the joint acquisition statements as required by Rule 13d-1(k)(1) under the Exchange Act. Exhibit 2: Registration Rights Agreement between the Company and General Atlantic (LFT), L.P. and certain other shareholders of the Company party thereto, dated as of June 3, 2026 (incorporated by reference to exhibit 10.1 to the Company's Current Report on Form 8-K, filed with the SEC on June 8, 2026). Exhibit 3: Lock-Up Agreement between the Representatives named therein and General Atlantic (LFT), L.P., dated as of February 5, 2026. Exhibit 4: Stockholders Agreement between the Company and General Atlantic (LFT), L.P., dated as of June 3, 2026 (incorporated by reference to exhibit 10.3 to the Company's Current Report on Form 8-K, filed with the SEC on June 8, 2026). GENERAL ATLANTIC, L.P. /s/ Michael Gosk 06/12/2026 General Atlantic (SPV) GP, LLC /s/ Michael Gosk 06/12/2026 General Atlantic Partners 100, L.P. /s/ Michael Gosk 06/12/2026 General Atlantic (LFT), L.P. /s/ Michael Gosk 06/12/2026 General Atlantic Partners (Lux) SCSp /s/ Ingrid van der Hoorn 06/12/2026 /s/ William Blackwell 06/12/2026 General Atlantic GenPar, L.P. /s/ Michael Gosk 06/12/2026 GAP Coinvestments III, LLC /s/ Michael Gosk 06/12/2026 GAP Coinvestments IV, LLC /s/ Michael Gosk 06/12/2026 GAP Coinvestments V, LLC /s/ Michael Gosk 06/12/2026 GAP Coinvestments CDA, L.P. /s/ Michael Gosk 06/12/2026 General Atlantic GenPar (Lux) SCSp /s/ Ingrid van der Hoorn 06/12/2026 /s/ William Blackwell 06/12/2026 General Atlantic (Lux) S.a r.l. /s/ Ingrid van der Hoorn 06/12/2026 /s/ William Blackwell 06/12/2026 General Atlantic GenPar (Bermuda), L.P. /s/ Michael Gosk 06/12/2026 GAP (Bermuda) L.P. /s/ Michael Gosk 06/12/2026