IR Contact Investor Relations Contact David Ryzhik Phone: 978-787-4000 investor.relations@axcelis.com Stock Listing Axcelis’ common stock is traded on the NASDAQ Global Select market under the symbol ACLS. Axcelis’ common stock CUSIP Number is 054540208. Independent Auditors Ernst & Young, LLP 200 Clarendon Street Boston, MA 02116 Transfer Agent & Registrar Computershare Trust Company