Exhibit 99.1

Bristol-Myers Squibb Company Announces Extension of the Expiration Date for Exchange Offers for Celgene Corporation Notes

NEW YORK, June 28, 2019 – Bristol-Myers Squibb Company (NYSE:BMY) (“Bristol-Myers Squibb) announced today the extension of the expiration date of the offers to exchange (the “Exchange Offers”) notes (the “Celgene Notes”) issued by Celgene Corporation (NASDAQ:CELG) (“Celgene”) for up to $19,850,000,000 aggregate principal amount of new notes to be issued by Bristol-Myers Squibb Company (the “Bristol-Myers Squibb Notes”) and cash and the related consent solicitations (the “Consent Solicitations”) being made by Bristol-Myers Squibb on behalf of Celgene to adopt certain proposed amendments (the “Amendments”) to the indentures governing the Celgene Notes. Bristol-Myers Squibb hereby extends such expiration date from 5:00 p.m., New York City time, on July 8, 2019, to 5:00 p.m., New York City time, on September 30, 2019 (as the same may be further extended, the “Expiration Date”).

On the early participation date of May 1, 2019, requisite consents were received and supplemental indentures were executed, eliminating substantially all restrictive covenants and certain events of default and other provisions in each of the indentures governing the Celgene Notes. Such supplemental indentures will only become operative upon the settlement date of the Exchange Offers.

The Exchange Offers and Consent Solicitations are being made pursuant to the terms and subject to the conditions set forth in the confidential offering memorandum and consent solicitation statement dated April 17, 2019 and the related letter of transmittal hereby, each as amended by the press releases dated May 1, 2019 and May 24, 2019 and as amended hereby, and are conditioned upon the closing of Bristol-Myers Squibb’s acquisition of Celgene (the “Merger”), which condition may not be waived by Bristol-Myers Squibb, and certain other conditions that may be waived by Bristol-Myers Squibb.

The settlement date for the Exchange Offers is expected to occur promptly after the Expiration Date and on or about the closing date of the Merger. The closing of the Merger is expected to occur at the end of 2019 or the beginning of 2020. As a result, the Expiration Date may be further extended one or more times. Bristol-Myers Squibb will provide notice of any such extension in advance of the Expiration Date.

Except as described in this press release, all other terms of the Exchange Offers and Consent Solicitations remain unchanged.

As of 5:00 p.m., New York City time, on June 27, 2019, the principal amounts of Celgene Notes set forth in the table below had been validly tendered and not validly withdrawn:

Documents relating to the Exchange Offers and Consent Solicitations will only be distributed to eligible holders of Celgene Notes who complete and return an eligibility form confirming that they are either a “qualified institutional buyer” under Rule 144A or not a “U.S. person” and outside the United States under Regulation S for purposes of applicable securities laws. Except as amended by the press releases dated May 1, 2019 and May 24, 2019 and as amended hereby, the complete terms and conditions of the Exchange Offers and Consent Solicitations are described in the confidential offering memorandum and consent solicitation statement dated April 17, 2019 and the related letter of transmittal, copies of which may be obtained by contacting Global Bondholder Services Corporation, the exchange agent and information agent in connection with the Exchange Offers and Consent Solicitations, at (866) 470 3900 (U.S. toll-free) or (212) 430 3774 (banks and brokers). The eligibility form is available electronically at:  https://gbsc-usa.com/eligibility/bristol-myers .

This press release does not constitute an offer to sell or purchase, or a solicitation of an offer to sell or purchase, or the solicitation of tenders or consents with respect to, any security. No offer, solicitation, purchase or sale will be made in any jurisdiction in which such an offer, solicitation or sale would be unlawful. The Exchange Offers and Consent Solicitations are being made solely pursuant to the confidential offering memorandum and consent solicitation statement dated April 17, 2019, as amended by the press releases dated May 1, 2019 and May 24, 2019 and as amended hereby, and the related letter of transmittal and only to such persons and in such jurisdictions as are permitted under applicable law.

The Bristol-Myers Squibb Notes offered in the Exchange Offers have not been registered under the Securities Act of 1933, as amended, or any state securities laws. Therefore, the Bristol-Myers Squibb Notes may not be offered or sold in the United States absent registration or an applicable exemption from the registration requirements of the Securities Act of 1933, as amended, and any applicable state securities laws.

Cautionary Statement Regarding Forward-Looking Statements

This press release contains certain “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, regarding, among other things, the research, development and commercialization of pharmaceutical products and the Merger. You can identify these forward-looking statements by the fact that they use words such as “should,” “expect,” “anticipate,” “estimate,” “target,” “may,” “project,” “guidance,” “intend,” “plan,” “believe” and others words and terms of similar meaning and expression in connection with any discussion of the Merger, future operating or financial performance. All statements that are not statements of historical facts are, or may be deemed to be, forward-looking statements. Such forward-looking statements are based on historical performance and current expectations and projections about our future financial results, goals, plans and objectives and involve inherent risks, assumptions and uncertainties, including internal or external factors that could delay, divert or change any of them in the next several years, that are difficult to predict, may be beyond our control and could cause our future financial results, goals, plans and objectives to differ materially from those expressed in, or implied by, the statements.

Important risk factors could cause actual future results and other future events to differ materially from those currently estimated by management, including, but not limited to, the risks that: the completion of the Merger may not occur on the anticipated terms and timing or at all; a condition to the closing of the Merger may not be satisfied; the combined company will have substantial indebtedness following the completion of the Merger; Bristol-Myers Squibb is unable to achieve the synergies and value creation contemplated by the Merger; Bristol-Myers Squibb is unable to promptly and effectively integrate Celgene’s businesses; management’s time and attention is diverted on transaction related issues; disruption from the transaction makes it more difficult to maintain business, contractual and operational relationships; the credit ratings of the combined company decline following the Merger; legal proceedings are instituted against Bristol-Myers Squibb, Celgene or the combined company; Bristol-Myers Squibb, Celgene or the combined company is unable to retain key personnel; and the announcement or the consummation of the Merger has a negative effect on the market price of the capital stock of Bristol-Myers Squibb and Celgene or on Bristol-Myers Squibb’s and Celgene’s operating results. No forward-looking statement can be guaranteed.

Forward-looking statements in this press release should be evaluated together with the many risks and uncertainties that affect Bristol-Myers Squibb’s and Celgene’s respective business and market, particularly those identified in the cautionary statement and risk factors discussion in Bristol-Myers Squibb’s and Celgene’s respective Annual Reports on Form 10-K for the year ended December 31, 2018, as updated by their subsequent Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other filings with the Securities and Exchange Commission. The forward-looking statements included in this press release are made only as of the date of this document and except as otherwise required by applicable law, Bristol-Myers Squibb undertakes no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events, changed circumstances or otherwise.

Contacts

Media:

Carrie L. Fernandez

609-252-5222

carrie.fernandez@bms.com

Investors:

Tim Power

609-252-7509

timothy.power@bms.com