ACLS ▼ -5.2% - Axcelis Technologies, Inc. $ACLS - Axcelis Announces Sponsorship and Participation in the 25th International Conference on Ion Implantation and Annealing Technology 2026 Axcelis Technologies fell 5.2% today following its announcement of sponsorship and participation in the 25th International Conference on Ion Implantation and Annealing Technology in 2026. The company's stock move did not correlate with promotional news of industry engagement, suggesting the decline was driven by factors outside the headline announcement. 14-SEP-2026 08:04 AM ET