A variety of methods were used in the log P challenge. There were 33 blind submissions collected from 17 groups (Tables of participants and their predictions can be found in the SAMPL7 GitHub Repository and in the Supporting Information.). In the SAMPL6 octanol-water log P challenge there were 91 blind submissions collected from 27 participating groups. In the SAMPL5 Cyclohexane-Water log D challenge, there were 76 submissions from 18 participating groups , so participation was lower than previous iterations. This modestly decreased participation (by one group) was likely in part because of COVID-19-related disruptions and because this challenge had to be conducted on a short timescale with relatively limited publicity because the experimental data was not generated specifically for SAMPL, and thus staging of the SAMPL7 challenge required delaying submission of an experimental study which was already complete.