Imara Reports Second Quarter 2020 Financial Results and Business Highlights Initiated Phase 2b clinical trials of IMR-687 in sickle cell disease and beta-thalassemia; First patient dosed in Ardent Phase 2b sickle cell cl

Imara Reports Second Quarter 2020 Financial Results and Business Highlights

Initiated Phase 2b clinical trials of IMR-687 in sickle cell disease and beta-thalassemia; First patient dosed in Ardent Phase 2b sickle cell clinical trial

Reported Phase 2a interim safety and efficacy data at the European Hematology Association Annual Congress and promising clinical outcomes in an Open Label Extension Study that tests IMR-687 for longer duration

IMR-687 granted Orphan Drug, Fast Track and Rare Pediatric designations

by the FDA for beta-thalassemia

Company to host conference call and live webcast today at 8:30 a.m. ET

BOSTON, Mass., August 14, 2020 - Imara Inc. (Nasdaq: IMRA), a clinical-stage biopharmaceutical company dedicated to developing and commercializing novel therapeutics to treat patients suffering from rare inherited genetic disorders of hemoglobin, today reported financial results for the second quarter ended June 30, 2020 and reviewed recent business highlights.

"As we head into the second half of 2020, we are encouraged by several advancements across our programs that bring us closer to providing oral treatment options to patients with rare blood disorders," said Rahul Ballal, Ph.D., President and Chief Executive Officer of Imara. "We initiated our Phase 2b clinical trials for IMR-687 in both sickle cell disease and beta-thalassemia and dosed the first patient in our Ardent Phase 2b clinical trial for adult patients with sickle cell disease. We also reported encouraging Phase 2a interim clinical trial results with IMR-687 at the European Hematology Association Annual Congress and more recently observed promising clinical outcomes with longer duration IMR-687 treatment as part of our Phase 2a open label extension trial. In addition, we made important progress on the regulatory front as we were granted Orphan Drug, Fast Track and Rare Pediatric designations by the FDA for the treatment of patients with beta-thalassemia. Finally, we are leveraging IMR-687's differentiated mechanism of action and began preclinical studies to explore its potential for the treatment of heart failure with preserved ejection fraction, or HFpEF."

Dr. Ballal continued, "We look forward to further advancing patient recruitment activities for our Phase 2b clinical trials and expect to report top-line data from our ongoing Phase 2a clinical trial in sickle cell disease during the fourth quarter of 2020."

Recent Corporate Highlights and Updates

In addition, two adult patients with SCD have passed six-months of treatment in the Company's ongoing Phase 2a open label extension (OLE) clinical trial (one at six months and one at twelve months). A review of outcomes for these two patients indicate potential benefits of IMR-687 with respect to reported vaso-occlusive crises (VOCs) trends, healthcare facility use, and SCD associated biomarkers. Enrollment in the OLE has also recently increased as the Phase 2a trial is completing, with six of eight patients entering this four-year safety study since the beginning June 2020.

Second Quarter 2020 Financial Results

The Company currently expects that its full-year 2020 research and development expenses will range between $35 million and $40 million and that its full-year 2020 general and administrative expenses will range between $8 million and $10 million. The Company expects that its cash, cash equivalents and investments as of June 30, 2020 will be sufficient to enable it to fund its planned operations into mid-2022.

Conference Call and Webcast Information

Imara will host a conference call and live webcast today at 8:30 a.m. ET to discuss its second quarter 2020 financial results and other business updates.

The live webcast will be available under "Events and Presentations" in the Investors section of the company's website at imaratx.com. The conference call can be accessed by dialing 1 (833) 519-1307 (U.S. domestic) or +1 (914) 800-3873 (international) and referring to conference ID 9775635. A replay of the webcast will be archived on the Imara website following the presentation.

Imara Inc. is a clinical-stage biotechnology company dedicated to developing and commercializing novel therapeutics to treat patients suffering from rare inherited genetic disorders of hemoglobin. Imara is currently advancing IMR-687, a highly selective, potent small molecule inhibitor of PDE9 that is an oral, once-a-day, potentially disease-modifying treatment for sickle cell disease and beta-thalassemia. IMR-687 is being designed to have a multimodal mechanism of action that acts on red blood cells, white blood cells, adhesion mediators and other cell types. For more information, please visit www.imaratx.com.

Cautionary Note Regarding Forward-Looking Statements

Statements in this press release about future expectations, plans and prospects, as well as any other statements regarding matters that are not historical facts, may constitute "forward-looking statements" within the meaning of The Private Securities Litigation Reform Act of 1995. These statements include, but are not limited to, statements made by Dr. Ballal in this press release and statements relating to (i) the timing for reporting and the quality of data from the ongoing Phase 2a clinical trial evaluating IMR-687 in patients with sickle cell disease, (ii) the design and timing of the Company's clinical development program for IMR-687, including the open label extension clinical trial of IMR-687 in sickle cell disease and the recently initiated Phase 2b clinical trials in patients with sickle cell disease and beta-thalassemia, (iii) the Company's development plans and preclinical studies of IMR-687 in heart failure with preserved ejection fraction; (iv) the Company's beliefs regarding the strength of its clinical data, the therapeutic potential of IMR-687 and advancement of its clinical program, and (v) financial guidance regarding the Company's projected operating expenses and sufficiency of the Company's capital resources to fund its operations into mid-2022. The words "anticipate," "believe," "continue," "could," "estimate," "expect," "intend," "may," "plan," "potential," "predict," "project," "should," "target," "will," "would" and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors, including: the impact of extraordinary external events, such as the risks and uncertainties resulting from the impact of the COVID-19 pandemic on the Company's business, operations, strategy, goals and anticipated milestones, including its ongoing and planned research activities and ability to conduct and readout data from its ongoing Phase 2a clinical trial of IMR-687 in sickle cell disease and its ability to enroll, dose and readout data from its open label extension clinical trial of IMR-687 in sickle cell disease and its Phase 2b clinical trials of IMR-687 in sickle cell disease and beta-thalassemia; the Company's ability to advance the development of IMR-687 under the timelines it projects in current and future clinical trials, demonstrate in any current and future clinical trials the requisite safety and efficacy of IMR-687, replicate scientific and non-clinical data in clinical trials, obtain and

maintain necessary regulatory approvals, obtain, maintain and enforce necessary patent and other intellectual property protection, identify, enter into and maintain collaboration agreements with third parties, manage competition, manage expenses, raise the substantial additional capital needed to achieve its business objectives, attract and retain qualified personnel, and successfully execute on its business strategies; and other factors discussed in the "Risk Factors" section of the Company's most recent Quarterly Report on Form 10-Q, which is on file with the Securities and Exchange Commission and in other filings that the Company makes with the Securities and Exchange Commission in the future. Any forward-looking statements contained in this press release speak only as of the date hereof, and the Company expressly disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise.

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