Exhibit 99.4
Proactive email for CMC vendors
Hello [—]
As a follow up to multiple discussions we’ve had over the last few months, I wanted to make sure that you were aware of an important announcement that bluebird made earlier today. In short, we have entered into an agreement to be acquired and taken private by Carlyle and SK Capital. This marks a significant and positive step in our journey to bring life-changing gene therapies to patients impacted by severe genetic diseases, as Carlyle and SK Capital will provide bluebird primary capital to scale bluebird’s commercial delivery of gene therapies.
We expect that, upon closing, David Meek – the former CEO of Mirati Therapeutics, FerGene, and Ipsen and current Chairman of Sobi and uniQure – will step into the role of CEO. I would value the chance to walk you through some of the implications of this announcement and appreciate if you can offer a few time slots today or tomorrow for a short call.
While this update does not impact ongoing critical delivery activities, it is likely that there will be some meetings cancelled or moved today as we complete internal communications. We might need to ask for a little grace as we ensure that information is shared and processed internally.
Thank you for your continued collaboration and commitment to our shared mission for patients.
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ADDITIONAL INFORMATION AND WHERE TO FIND IT
The tender offer for the outstanding shares of bluebird bio referenced in this communication has not yet commenced. This communication is not an offer to buy nor a solicitation of an offer to sell any securities of bluebird bio. The solicitation and the offer to buy shares of bluebird bio common stock will only be made pursuant to a Tender Offer Statement on Schedule TO, including an offer to purchase, a letter of transmittal and other related materials that Beacon Parent Holdings, L.P. (“Parent”) and Beacon Merger Sub, Inc. (“Merger Sub”) intend to file with the Securities and Exchange Commission. In addition, bluebird bio will file with the SEC a Solicitation/Recommendation Statement on Schedule 14D-9 with respect to the tender offer. Once filed, investors will be able to obtain a free copy of these materials and other documents filed by Parent, Merger Sub and bluebird bio with the SEC at the website maintained by the SEC at www.sec.gov. Investors may also obtain, at no charge, any such documents filed with or furnished to the SEC by bluebird bio under the “investors & media” section of bluebird bio’s website at www.bluebirdbio.com.
INVESTORS AND SECURITY HOLDERS ARE ADVISED TO READ THESE DOCUMENTS WHEN THEY BECOME AVAILABLE, INCLUDING THE SOLICITATION/RECOMMENDATION STATEMENT ON SCHEDULE 14D-9 OF BLUEBIRD BIO AND ANY AMENDMENTS THERETO, AS WELL AS ANY OTHER DOCUMENTS RELATING TO THE TENDER OFFER AND THE MERGER THAT ARE FILED WITH THE SEC, CAREFULLY AND IN THEIR ENTIRETY PRIOR TO MAKING ANY DECISIONS WITH RESPECT TO WHETHER TO TENDER THEIR SHARES INTO THE TENDER OFFER BECAUSE THEY CONTAIN IMPORTANT INFORMATION, INCLUDING THE TERMS AND CONDITIONS OF THE TENDER OFFER.