ImmunoGen Announces Virtual 2020 Annual Meeting of Shareholders - Seite 2

Instructions on how to connect to the Annual Meeting and participate via the Internet, including how to demonstrate proof of stock ownership, ask questions, and vote, are posted at www.virtualshareholdermeeting.com/IMGN2020.

Shareholders will also be able to submit questions through the platform being used for the Annual Meeting. Shareholders may ask questions that are confined to matters properly presented at the Annual Meeting and of general concern to the Company.

The Annual Meeting will begin promptly at 9:00 a.m. Eastern on June 17, 2020. Shareholders are encouraged to access the Annual Meeting prior to the start time. Online access will open approximately at 8:45 a.m. Eastern, and shareholders should allow ample time to log in to the Annual Meeting and test their computer audio system. The Company recommends that shareholders carefully review in advance the procedures needed to gain admission to the Annual Meeting.

Whether or not a shareholder plans to attend the Annual Meeting, the Company urges shareholders to vote and submit their proxy in advance of the Annual Meeting by one of the methods described in the proxy materials for the Annual Meeting.

A notice regarding this change to a virtual meeting format (the “Notice”) is being filed with the Securities and Exchange Commission together with this press release. Additional information regarding the Annual Meeting, shareholder participation and voting is provided in the Notice, which all shareholders are urged to read.

Technical Difficulties

If shareholders encounter any difficulties accessing the virtual meeting during the check-in or meeting time, please call the technical support number that will be posted on the virtual Annual Meeting log in page.

The virtual Annual Meeting platform is fully supported across browsers (Internet Explorer, Firefox, Chrome, and Safari) and devices (desktops, laptops, tablets, and cell phones) running the most updated version of applicable software and plugins. Shareholders should ensure that they have a strong internet connection wherever they intend to participate in the Annual Meeting. Shareholders should also give themselves plenty of time to log in and ensure that they can hear streaming audio prior to the start of the Annual Meeting.

ABOUT IMMUNOGEN

ImmunoGen is developing the next generation of antibody-drug conjugates (ADCs) to improve outcomes for cancer patients. By generating targeted therapies with enhanced anti-tumor activity and favorable tolerability profiles, we aim to disrupt the progression of cancer and offer our patients more good days. We call this our commitment to “target a better now.”

Learn more about who we are, what we do, and how we do it at www.immunogen.com.

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