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Exhibit 99.4

TCO Transaction Announcement Business Partner Letter

Dear NAME,

I am reaching out with important news about the future of our company. You may have seen our announcement that we have entered into an agreement to become a private company and form a joint venture with Simon Property Group. This transaction represents the beginning of an exciting new chapter in our company’s history. For all of the details, you can read the press release here.

In terms of next steps, the transaction is expected to close in mid-2020. Until that time, we will continue to operate as two independent companies. After the transaction is completed, your point of contact at Taubman will stay the same and we look forward to continuing our relationship with you. We intend to maintain our headquarters location in Bloomfield Hills and operate much as we do today – under the same management team, and with the same commitment to our Taubman values and brand – with Bobby Taubman continuing as Taubman Chairman, President and Chief Executive Officer.

In short, it is largely business as usual here, and we look forward to continuing our work with you as normal. Please do not hesitate to contact me if you have any questions.

From everyone at Taubman, thank you for your continued partnership and trust – we look forward to accelerating our mutual success.

Sincerely,

NAME

Forward Looking Statements

This communication contains certain “forward-looking” statements as that term is defined by Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Statements that are predictive in nature, that depend on or relate to future events or conditions, or that include words such as “believes”, “anticipates”, “expects”, “may”, “will”, “would,” “should”, “estimates”, “could”, “intends”, “plans” or other similar expressions are forward-looking statements. Forward-looking statements involve significant known and unknown risks and uncertainties that may cause actual results in future periods to differ materially from those projected or contemplated in the forward-looking statements as a result of, but not limited to, the following factors: the failure to receive, on a timely basis or otherwise, the required approvals by Taubman’s shareholders; the risk that a condition to closing of the transaction may not be satisfied; Simon’s and Taubman’s ability to consummate the transaction; the possibility that the anticipated benefits from the transaction will not be fully realized; the ability of Taubman to retain key personnel and maintain relationships with business partners pending the consummation of the transaction; and the impact of legislative, regulatory and competitive changes and other risk factors relating to the industries in which Simon and Taubman operate, as detailed from time to time in each of Simon’s and Taubman’s reports filed with the SEC. There can be no assurance that the transaction will in fact be consummated.

Additional information about these factors and about the material factors or assumptions underlying such forward-looking statements may be found under Item 1.A in Taubman’s Annual Report on Form 10-K for the fiscal year ended December 31, 2018. Taubman cautions that the foregoing list of important factors that may affect future results is not exhaustive. When relying on forward-looking statements to make decisions with respect to the proposed transaction, shareholders and others should carefully consider the foregoing factors and other uncertainties and potential events. All subsequent written and oral forward-looking statements concerning the proposed transaction or other matters attributable to Taubman or any other person acting on their behalf are expressly qualified in their entirety by the cautionary statements referenced above. The forward-looking statements contained herein speak only as of the date of this communication. Taubman does not undertake any obligation to update or revise any forward-looking statements for any reason, even if new information becomes available or other events occur in the future, except as may be required by law.

CONFIDENTIAL

Additional Information and Where to Find It

This communication is being made in respect of the proposed transaction involving Taubman and Simon. In connection with the proposed transaction, Taubman intends to file relevant materials with the Securities and Exchange Commission (the “SEC”), including a preliminary proxy statement on Schedule 14A. Promptly after filing its definitive proxy statement with the SEC, Taubman will mail the definitive proxy statement and a proxy card to each shareholder of Taubman entitled to vote at the special meeting relating to the proposed transaction. This communication is not a substitute for the proxy statement or any other document that Taubman may file with the SEC or send to its shareholders in connection with the proposed transaction. BEFORE MAKING ANY VOTING DECISION, SHAREHOLDERS OF TAUBMAN ARE URGED TO READ THESE MATERIALS (INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) AND ANY OTHER RELEVANT DOCUMENTS IN CONNECTION WITH THE PROPOSED TRANSACTION THAT TAUBMAN WILL FILE WITH THE SEC WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT TAUBMAN AND THE PROPOSED TRANSACTION. The definitive proxy statement, the preliminary proxy statement and other relevant materials in connection with the proposed transaction (when they become available), and any other documents filed by TAUBMAN with the SEC, may be obtained free of charge at the SEC’s website (http://www.sec.gov) or at Taubman’s website (www.taubman.com).

Participants in the Solicitation

Taubman and certain of its directors, executive officers and employees may be considered participants in the solicitation of proxies in connection with the proposed transaction. Information regarding the persons who may, under the rules of the SEC, be deemed participants in the solicitation of the shareholders of Taubman in connection with the transaction, including a description of their respective direct or indirect interests, by security holdings or otherwise, is included in the Proxy Statement described above filed with the SEC. Additional information regarding Taubman’s directors and executive officers is also included in Taubman’s proxy statement on Schedule 14A for its 2019 Annual Meeting of Shareholders, which was filed with the SEC on April 30, 2019, or its Annual Report on Form 10-K for the year ended December 31, 2018, which was filed with the SEC on February 28, 2019. These documents are available free of charge as described above.

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