[purplebutterfly]

It seems fairly common to the point that 401k vesting horizons are something that can be expected. Filtering on "Vesting" against the Bloomberg data, 2 of the top 10 have similar conditions (with MasterCard requiring 4 years instead of 3, though their match is considerably better than Amazon's). Outside of the top 10 there is still a healthy representation of companies that do not immediately vest.

Well-funded 401k matching plans that vest immediately certainly help with mobility, for those who care to stick around for the match!