X0206 3 2017-01-27 0 0001609212 AMG Pantheon Master Fund, LLC N/A 0001696461 Garfunkle Matt C/O PANTHEON VENTURES (US) LP 600 MONTGOMERY STREET SAN FRANCISCO CA 94111 0 0 0 1 Managing Director (1) Units of Beneficial Ownership 0 D Matt Garfunkle is a Managing Director of Pantheon (US) LLC and portfolio manager of the fund and does not beneficially own any securities in the fund. Pantheon (US) LLC is the General Partner of Pantheon Ventures (US) LP, the investment adviser of the fund. By: /s/ Matt Garfunkle 2017-02-07