Twenty journals lost their impact factors in this year’s Journal Citation Reports for excessive self-citation and citation stacking. Nearly half of the journals on the list are from well-known publishers MDPI, Sage, Springer, Taylor & Francis and Wiley.

Many institutions use the controversial metric as an indicator of journal quality. And suppressing a journal’s impact factor can have negative effects on the publication and the authors who publish papers in it. In 2024, Clarivate suppressed 17 impact factors, a substantial increase from 2023’s four. The publishers of some of these journals disagree with the Clarivate's decision, while others have launched internal investigations.

Source https://retractionwatch.com/2025/06/18/clarivate-impact-factor-suppression-list-2025-self-citation-stacking/

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