In this study we identify, and classify into families, transcription factors (TFs) and other transcriptional regulators (TRs) in genome sequences available from the Stramenopile group. For this we exploit the presence of protein domains and their combinations to build rules in the form of boolean rules, that are specific for each family of TFs and TRs. We found a correlation between the family size and some traits that has been described to be involved in the complexity of organisms. Furthermore, we found specific gains, losses and families that shows higher abundance in different lineages, which may be involved in the regulation of specific traits for some Stramenopile species.