Top: Mean number of progenitors per galaxy and distribution of the number of progenitors as a function of the distance to the closest filament at z = 0, 1 (green), and 2 (red). Bottom: Fraction of major mergers, defined as galaxies with secondary progenitors with a stellar-mass ratio of at least 1:4, for the three redshifts as a function of the distance to the closest filament. The frequency of recent mergers increases near filaments at low redshift, but major mergers remain rare and are unlikely to dominate environmental trends.