X0306 4 2021-10-26 0 0001866692 Amplitude, Inc. AMPL 0001640275 Institutional Venture Management XV, LLC 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001640274 Institutional Venture Partners XV, L.P. 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001300134 Chaffee Todd C 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001843938 Dash Somesh 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001140932 FOGELSONG NORMAN A 300 SAND HILL ROAD, BUILDING2, SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001299975 Harrick Stephen J 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001644264 Liaw Eric 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001553254 Maltz Jules A. 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001359524 Miller J Sanford 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 0001299965 Phelps Dennis B 300 SAND HILL ROAD, BUILDING 2 SUITE 250 MENLO PARK CA 94025 0 0 1 0 Class A Common Stock 2021-10-26 4 J 0 1146373 0.00 D 5610451 I See footnote Class A Common Stock 2021-10-26 4 J 0 6098 0.00 D 29835 I See footnote Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by IVP XV LP to its general partner and limited partners without additional consideration. The general partner further distributed the shares received in this distribution to its members on a pro rata basis for no consideration. These shares are owned directly by Institutional Venture Partners XV, L.P. (IVP XV LP"), of which Institutional Venture Management XV, LLC ("IVM XV") is the sole general partner and exercises voting and investment power over these shares. The managing directors of IVM XV are Todd C. Chaffee, Somesh Dash, Norman A. Fogelsong, Stephen J. Harrick, Eric Liaw, Jules A. Maltz, J. Sanford Miller and Dennis B. Phelps, Jr. The reporting persons disclaim beneficial ownership of these securities, except to the extent of their respective proportionate pecuniary interest therein and this report shall not be deemed an admission that any reporting person is the beneficial owner of such securities for Section 16 or any other purpose. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by IVP XV EF to its general partner and limited partners without additional consideration. The general partner further distributed the shares received in this distribution to its members on a pro rata basis for no consideration. These shares are owned directly by Institutional Venture Partners XV Executive Fund, L.P. ("IVP XV EF"), of which IVM XV is the sole general partner and exercises voting and investment power over these shares. The managing directors of IVM XV are Todd C. Chaffee, Somesh Dash, Norman A. Fogelsong, Stephen J. Harrick, Eric Liaw, Jules A. Maltz, J. Sanford Miller and Dennis B. Phelps, Jr. The reporting persons disclaim beneficial ownership of these securities, except to the extent of their respective proportionate pecuniary interest therein and this report shall not be deemed an admission that any reporting person is the beneficial owner of such securities for Section 16 or any other purpose. 1 of 2: The number of joint filers exceeds the EDGAR maximum of 10 joint filers per Form. This Form 4 is being filed in conjunction with a Form 4 being filed by Institutional Venture Partners XV Executive Fund, L.P. /s/ Tracy Hogan, as Attorney-in-Fact for Institutional Venture Management XV, LLC 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Institutional Venture Partners XV, L.P. 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Todd C. Chaffee 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Somesh Dash 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Norman A. Fogelsong 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Stephen J. Harrick 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Eric Liaw 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Jules A. Maltz 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for J. Sanford Miller 2021-10-28 /s/ Tracy Hogan, as Attorney-in-Fact for Dennis B. Phelps, Jr. 2021-10-28