X0306 4 2021-08-12 0 0001592386 Virtu Financial, Inc. VIRT 0001711970 North Island Ventures, LLC 667 MADISON AVE NEW YORK NY 10065 0 0 1 0 0001711953 North Island Holdings I, LP C/O ORDINAL VENTURES, LLC 667 MADISON AVE NEW YORK NY 10065 0 0 1 0 0001711954 North Island Holdings I GP, LP C/O ORDINAL VENTURES, LLC 667 MADISON AVE NEW YORK NY 10065 0 0 1 0 0001713500 North Island L.L.C. C/O GLENN H. HUTCHINS 667 MADISON AVE NEW YORK NY 10065 0 0 1 0 0001713499 West Meadow Group LLC C/O ROBERT GREIFELD 667 MADISON AVE NEW YORK NY 10065 0 0 1 0 0001027038 HUTCHINS GLENN H 667 MADISON AVE NEW YORK NY 10065 1 0 1 0 0001214669 GREIFELD ROBERT 667 MADISON AVE NEW YORK NY 10065 1 0 1 0 Class A common stock, par value $0.00001 per share 2021-08-12 4 S 0 1500000 26.15 D 19859243 I See footnotes On August 12, 2021, Ordinal Holdings I, LP sold 1,500,000 shares of the Issuer's Class A common stock, par value $0.00001 per share for approximately $26.15 per share to the Issuer. These shares are owned directly by Ordinal Holdings I, LP. The sole general partner of Ordinal Holdings I, LP is Ordinal Holdings I GP, LP. The sole general partner of Ordinal Holdings I GP, LP is Ordinal Ventures, LLC. Messrs. Hutchins and Greifeld, directly and/or indirectly through Tide Mill L.L.C. and West Meadow Group LLC, respectively, each control 50% of the membership interests in Ordinal Ventures, LLC. Each of Ordinal Holdings I GP, LP, Ordinal Ventures, LLC, Tide Mill L.L.C., and West Meadow Group LLC and Messrs. Hutchins and Greifeld may be deemed to beneficially own the shares beneficially owned by Ordinal Holdings I, LP, but each (other than the Ordinal Holdings I, LP to the extent of its direct holdings) disclaims beneficial ownership of such shares, except to the extent of such Reporting Person's pecuniary interest therein. (continued in Footnote 4) (continued from Footnote 3) The filing of this statement shall not be deemed to be an admission that, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the Reporting Persons are the beneficial owners of any securities reported herein. Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person. (see attachment for signatures) 2021-08-16