• Biologics License Application (BLA) for lovo-cel for sickle cell disease submitted to FDA 
• First commercial infusions completed for both ZYNTEGLO^® and SKYSONA^® 
• Ended quarter with $364M in cash, cash equivalents, marketable securities and restricted cash 

SOMERVILLE, Mass. / May 09, 2023 / Business Wire / bluebird bio, Inc. (NASDAQ: BLUE) (“bluebird bio” or the “Company”) today reported financial results and business highlights for the first quarter ended March 31, 2023, including recent commercial and operational progress, and regulatory updates.

"The first quarter of 2023 saw us continue to establish and scale the commercial model for ex-vivo gene therapy in the US through the launches of ZYNTEGLO and SKYSONA and lay the foundation for revenue generation for years to come for bluebird," said Andrew Obenshain, chief executive officer, bluebird bio. "Additionally, with the submission of the lovo-cel BLA for sickle cell disease in April, bluebird has taken a pivotal step towards realizing its most significant opportunity yet -- bringing a transformative gene therapy to individuals living with sickle cell disease."

RECENT HIGHLIGHTS

lovo-cel (lovotibeglogene autotemcel) BLA Submitted

• On April 24, 2023, bluebird bio announced it submitted its Biologics License Application (BLA) to the U.S. Food and Drug Administration (FDA) for lovo-cel for patients with sickle cell disease (SCD) who are 12 years and older and have a history of vaso-occlusive events. The Company has requested Priority Review, which, if granted, would shorten the FDA’s review of the application to six months from the time of filing, versus a standard review timeline of 10 months.

ZYNTEGLO^® (betibeglogene autotemcel) Commercial Launch

• In the weeks since the Company’s last commercial update, bluebird continues to build on the launch of ZYNTEGLO for beta-thalassemia. To date, there have been six patient starts (cell collections) for ZYNTEGLO.

• The first commercial ZYNTEGLO infusion has been completed and the Company anticipates recognizing revenue in Q2 2023.

• Payer uptake continues to be positive and to date, the Company has received zero ultimate denials for ZYNTEGLO; prior authorization approvals for drug product remain consistent at approximately two weeks.

• As previously communicated, patient starts remain the key commercial metric during the first year of the ZYNTEGLO launch. bluebird does not expect to provide ZYNTEGLO revenue projections for 2023.

SKYSONA^® (elivaldogene autotemcel) Commercial Launch

• First commercial infusion with SKYSONA was completed in March 2023. In total, cell collection has been completed for three patients.

• Since approval, bluebird has activated three qualified treatment centers (QTCs) to administer SKYSONA for patients with cerebral adrenoleukodystrophy (CALD). Two additional QTCs on the West Coast are anticipated in 2023.

UPCOMING ANTICIPATED MILESTONES

LOVO-CEL

• The Company anticipates BLA acceptance of lovo-cel for SCD in Q2 2023.
• The Company continues to anticipate commercial launch in early 2024, if approved. bluebird estimates approximately 20,000 individuals living with sickle cell disease (or 1/5 of the SCD population in the US) may be eligible for gene therapy.

ZYNTEGLO

• The Company is on track to scale to 40-50 QTCs by the end of 2023. bluebird’s QTC network is designed to maximize its commercial opportunity in beta-thalassemia and to prioritize proximity to individuals with living with SCD in anticipation of a 2024 commercial launch for lovo-cel, if approved by the FDA.

SKYSONA

• The Company continues to anticipate 5-10 patient starts this year as previously guided.

FIRST QUARTER 2023 FINANCIAL RESULTS

• Cash Position: The Company’s cash, cash equivalents, marketable securities and restricted cash balance was approximately $364 million, as of March 31, 2023. As bluebird bio launches two first-in-class gene therapies and readies its third investigational gene therapy for SCD for the commercial setting, full-year 2023 cash burn is expected to be in the range of $270-$300 million, as previously guided. Based on current operating plans, bluebird expects its cash, cash equivalents, marketable securities and restricted cash will be sufficient to meet bluebird’s planned operating expenses and capital expenditure requirements into the fourth quarter of 2024. This runway includes approximately $45 million of restricted cash, which is currently unavailable for use. Please see our Quarterly Report on Form 10-Q for the quarter ended March 31, 2023 for further information regarding our cash runway guidance and other financial results.

• Revenue, net: Total revenue, net was $2.4 million for the three months ended March 31, 2023, compared to $1.9 million for the three months ended March 31, 2022. The increase of $0.4 million was primarily due to SKYSONA product revenue.

• SG&A Expenses: Selling, general and administrative expenses were $37.4 million for the three months ended March 31, 2023, compared to $36.1 million for the three months ended March 31, 2022. SG&A includes lease expense related to the 50 Binney Street; however, sublease income is presented in other income (expense), net. Excluding the lease expense for 50 Binney St., SG&A expenses were $27.8 million for the three months ended March 31, 2023, compared to $36.1 million for the three months ended March 31, 2022. This decrease is mainly attributable to costs related to employee compensation, benefits, and other head-count related expenses.

• R&D Expenses: Research and development expenses were $46.1 million for the three months ended March 31, 2023, compared to $77.9 million for the three months ended March 31, 2022. The decrease of $31.7 million was primarily due to decreased employee compensation, benefit and other headcount-related expenses and a decrease in R&D production costs in 2023.

• Gain from sale of priority review voucher: Operating expenses were offset by the one-time gain from sale of the Company’s second priority review voucher, for $92.9 million, net, in the first quarter of 2023.

• Net income (loss): Net income was $21.2 million for the three months ended March 31, 2023, compared to a net loss of $122.2 million for the three months ended March 31, 2022.

About bluebird bio, Inc.

bluebird bio is pursuing curative gene therapies to give patients and their families more bluebird days.

With a dedicated focus on severe genetic diseases, bluebird has industry-leading programs for sickle cell disease, β-thalassemia and cerebral adrenoleukodystrophy and is advancing research to apply new technologies to these and other diseases. We custom design each of our therapies to address the underlying cause of disease and have developed in-depth and effective analytical methods to understand the safety of our lentiviral vector technologies and drive the field of gene therapy forward.

Founded in 2010, bluebird has the largest and deepest ex-vivo gene therapy data set in the world—setting the standard for the industry. Today, bluebird continues to forge new paths, combining our real-world experience with a deep commitment to patient communities and a people-centric culture that attracts and grows a diverse flock of dedicated birds.

bluebird bio, ZYNTEGLO and SKYSONA are registered trademarks of bluebird bio, Inc. All rights reserved.

Forward-Looking Statements

This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. All statements that are not statements of historical facts are, or may be deemed to be, forward-looking statements, including our statements regarding the Company’s financial condition, results of operations, commercial revenue and key metrics, including the expected number of patient starts, and anticipated reporting and timing thereof; anticipated cash runway, including restricted cash; and anticipated cash burn for 2023 as well as statements regarding the Company’s plans and expectations for operations including expected timing relating to its regulatory approvals, plans to expand manufacturing capacity, anticipated growth of our QTC network and timing thereof, plans for future regulatory submissions, our expectations regarding the possible approval of lovo-cel by FDA, the expected timing relating to the potential acceptance and regulatory approval of our BLA for lovo-cel and the fact that a potential granting of Priority Review may shorten the FDA’s review of the BLA to six months, and the timing of commercial launch of lovo-cel, if approved. 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. 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 bluebird bio’s business, particularly those identified in the risk factors discussion in bluebird bio’s Annual Report on Form 10-K, as updated by our subsequent Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and other filings with the Securities and Exchange Commission. These risks include, but are not limited to: delays and challenges in our commercialization and manufacturing of our products, including risks associates with demonstrating analytical comparability with respect to our lovo-cel program; the risk that we may not realize expected cost savings from the restructuring, including the anticipated decrease in operational expenses, at the levels we expect; we may encounter additional delays in the development of our programs, including the imposition of new clinical holds, that may impact our ability to meet our expected timelines and increase our costs; the internal and external costs required for our ongoing and planned activities, and the resulting impact on expense and use of cash, has been, and may in the future be, higher than expected which has caused us, and may in the future cause us to use cash more quickly than we expect or change or curtail some of our plans or both; our expectations as to expenses, cash usage and cash needs may prove not to be correct for other reasons such as changes in plans or actual events being different than our assumptions; the risk that the efficacy and safety results from our prior and ongoing clinical trials will not continue or be seen in additional patients treated with our product candidates; the risk that additional insertional oncogenic or other reportable events associated with lentiviral vector, drug product, or myeloablation will be discovered or reported over time; the risk that our eli-cel, beti-cel and lovo-cel programs may be subject to further delays in their development, including but not limited to the imposition of new clinical holds; the risk that any one or more of our products or product candidates, including eli-cel and, beti-cel or lovo-cel, will not be successfully developed, approved or commercialized, as applicable. The forward-looking statements included in this document are made only as of the date of this document and except as otherwise required by applicable law, bluebird bio 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.