Important Information for Investors and Stockholders In connection with the proposed transaction, Unity has filed with the SEC a registration statement on Form S-4 (File No. 333-266418) (the "Registration Statement") that was declared effective by the SEC on September 8, 2022. The Registration Statement includes a joint proxy statement of Unity and ironSource that also constitutes a prospectus of Unity, which joint proxy statement/prospectus was mailed or otherwise disseminated to Unity's and ironSource's respective shareholders, as applicable. Unity and ironSource also plan to file other relevant documents with the SEC regarding the proposed transaction. INVESTORS ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS, THE SUPPLEMENTAL DISCLOSURE PROVIDED IN THIS CURRENT REPORT ON FORM 8-K AND OTHER RELEVANT DOCUMENTS FILED WITH THE SEC IF AND WHEN THEY BECOME AVAILABLE CAREFULLY AND IN THEIR ENTIRETY, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION.