X0206 3 2017-10-18 0 0001713952 Mosaic Acquisition Corp. MOSC 0001380393 Fortress Investment Group LLC 1345 AVENUE OF THE AMERICAS 46TH FLOOR NEW YORK NY 10105 true 0001427188 FIG Asset Co. LLC 1345 AVENUE OF THE AMERICAS 46TH FLOOR NEW YORK NY 10105 true 0001427223 Principal Holdings I LP 1345 AVENUE OF THE AMERICAS 46TH FLOOR NEW YORK NY 10105 true 0001719691 Fortress Mosaic Sponsor LLC 1345 AVENUE OF THE AMERICAS 46TH FLOOR NEW YORK NY 10105 true Class F ordinary shares, par value $0.0001 per share Class A ordinary shares, par value $0.0001 per share 4297500 I See Explanation of Responses Fortress Mosaic Sponsor LLC ("Sponsor") directly owns 4,297,500 Class F ordinary shares, par value $0.0001 per share (the "Class F Shares"), of Mosaic Acquisition Corp. (the "Issuer"), including 562,500 Class F Shares that are subject to forfeiture if the underwriters of the Issuer's initial public offering do not exercise in full an option granted to it to cover over-allotments. Pursuant to the Amended and Restated Memorandum and Articles of Association of the Issuer, the Class F Shares have no expiration date and (i) are convertible into Class A ordinary shares, par value $0.0001 per share ("Class A Shares"), of the Issuer at any time at the option of the holder on a one-for-one basis and (ii) will automatically convert into Class A Shares at the time of the Issuer's initial business combination on a one-for-one basis, in each case, subject to adjustment. The managing member of the Sponsor is Principal Holdings I LP ("Holdings"), whose general parter is FIG Asset Co. LLC ("FIG"), whose sole member is Fortress Investment Group LLC ("Fortress" and, together with Sponsor, Holdings and FIG, "the Reporting Persons"). Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any. Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests. Exhibit 99.1 Joint Filer Information, incorporated herein by reference. /s/ David N. Brooks, Authorized Signatory, FORTRESS INVESTMENT GROUP LLC 2017-10-18 /s/ David N. Brooks, Authorized Signatory, FIG ASSET CO. LLC 2017-10-18 /s/ David N. Brooks, Authorized Signatory, PRINCIPAL HOLDINGS I LP 2017-10-18 /s/ David N. Brooks, Authorized Signatory, FORTRESS MOSAIC SPONSOR LLC 2017-10-18