A decade of changes in OA and non-OA journal publication and production

This study examined trends in the publication of open access (OA) and non-OA journals and articles from 2011 to 2021 using SCImago Journal Rank (SJR) data. Results revealed that while the number of OA journals grew significantly, their share of total publications remained lower than non-OA journals. The number of non-OA publishers slightly decreased, while OA publishers increased rapidly. OA journal article production rose across all publisher sizes, with top publishers seeing the largest growth. Notably, MDPI emerged as a global leader in OA journal article publishing.