Having a look at https://github.com/pandas-dev/pandas/milestone/69?closed=1, it seems there's some contributors (e.g. dsaxton , srvanrell) who aren't listed in the whatsnew page: https://pandas.pydata.org/docs/whatsnew/v1.0.1.html > A total of 7 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time. > > Guillaume Lemaitre > > Jeff Reback > > Joris Van den Bossche > > Kaiqi Dong > > MeeseeksMachine > > Pandas Development Team > > Tom Augspurger