Filed by InterXion Holding N.V.
Pursuant to Rule 425 under the Securities Act of 1933
Subject Company: InterXion Holding N.V.
Filer’s SEC File No.: 001-35053

Press release 14 February 2020
Leading Independent Proxy Advisory Firm ISS Recommends InterXion
Shareholders Vote “FOR” All Proposals Related to ProposedStock-for-Stock Combination with Digital Realty
InterXion Urges Shareholders to Vote “FOR” All Merger-Related Proposals Today
Amsterdam – 14 February 2020 - InterXion Holding N.V. (NYSE: INXN), a leading European provider of carrier and cloud-neutral colocation data centre services, today announced that leading independent proxy advisory firm, Institutional Shareholder Services (“ISS”), recommends that InterXion shareholders vote “FOR” all proposals related to the Company’s proposed strategicstock-for-stock combination with Digital Realty Trust, Inc. (NYSE: DLR) at the Extraordinary General Meeting of InterXion (the “EGM”) scheduled for 27 February 2020.
At the EGM, InterXion shareholders will consider proposals related to the reorganization of InterXion following completion of Digital Realty’s exchange offer for InterXion shares. The exchange offer is the process by which InterXion’s shareholders are being offered the opportunity to exchange their shares. The proposals to be voted on at the EGM are in respect of customary Dutch transaction formalities to be taken following the completion of the exchange offer which enable Digital Realty to become the sole owner of all of InterXion’s business operations after successfully completing the exchange offer.
In recommending that InterXion shareholders vote“FOR” all proposals to be presented at the EGM, ISS noted in its report dated 14 February 2020, “Approval of the presented resolutions would allow shareholders to retain the optionality of tendering their shares into the offer”1.
1 | Permission to use neither sought nor obtained. |