NeuroBo Pharmaceuticals Reports Third Quarter 2024 Financial Results and Provides Corporate Update Reported Positive Top-Line Data From the SAD Part 1 of Its Phase 1 Clinical Trial Evaluating DA-1726 for the Treatment of

NeuroBo Pharmaceuticals Reports Third Quarter 2024 Financial Results

and Provides Corporate Update

Reported Positive Top-Line Data From the SAD Part 1 of Its Phase 1 Clinical Trial Evaluating DA-1726 for the Treatment of Obesity, Revealing Favorable Safety, Tolerability and Dose-Linear Pharmacokinetics

$21.7 Million in Cash at End of Third Quarter Expected to Fund the Company Into the Third Quarter of 2025

Top-Line Results from the Phase 2a Trial of DA-1241 for the Treatment of MASH Expected in December of 2024

Top-Line Data From the MAD Part 2 of the Phase 1 Trial of DA-1726 Expected in the First Quarter of 2025

Entered into a Joint Research Agreement, Together With Dong-A ST and ImmunoForge to Develop a Long-Acting Once-Monthly Formulation of DA-1726

CAMBRIDGE, Mass., November 7, 2024 - NeuroBo Pharmaceuticals, Inc. (Nasdaq: NRBO), a clinical-stage biotechnology company focused on transforming cardiometabolic diseases, today announced financial results for the third quarter ended September 30, 2024 and provided a corporate update.

"The third quarter was punctuated by the positive top-line results from the single ascending dose (SAD) Part 1 of our Phase 1 clinical trial of DA-1726, a novel, dual oxyntomodulin (OXM) analog agonist that functions as a glucagon-like peptide-1 receptor (GLP1R) and glucagon receptor (GCGR), for the treatment of obesity, revealing it to be safe and tolerable as well as demonstrating dose-linear pharmacokinetics (PK)," stated Hyung Heon Kim, President and Chief Executive Officer of NeuroBo. "Based on the excellent safety data from the SAD Part 1, we are currently engaged in the addition of one or more cohorts to further investigate the maximum tolerated dose, enabling us to fully harness the potential of DA-1726. Based on the pre-clinical data available, along with DA-1726's balanced activation of GLP1R and glucagon receptors, which enhances energy expenditure, we maintain our belief that it can emerge as a best-in-class obesity treatment, offering a more favorable tolerability profile compared to existing GLP-1 agonists and those in late-stage clinical trials. Importantly, the drug's strong safety profile also enabled the accelerated initiation of the multiple ascending dose (MAD) study, for which we expect to report top-line results from the planned cohorts during the first quarter of 2025.

"To further differentiate DA-1726, early in the quarter, we signed a joint research agreement, together with our collaboration partner, Dong-A ST and ImmunoForge, to develop a long-acting once monthly formulation of the drug. Additionally, we continue to plan for an early proof-of-concept, multicenter, randomized, double-blind, placebo-controlled Part 3 of the Phase 1 clinical trial to evaluate the efficacy and safety of DA-1726 in obese, otherwise healthy subjects, reflecting our strong commitment to rapidly advancing the clinical development of this promising cardiometabolic asset. Part 3 is anticipated to begin upon the completion of Part 2."

Mr. Kim continued, "After recently announcing the last patient last visit in our Phase 2a clinical trial for DA-1241, a novel G-Protein-Coupled Receptor 119 (GPR119) agonist, in subjects with presumed metabolic dysfunction-associated steatohepatitis (MASH), our next clinical milestone is the full data readout expected in December of this year. As a reminder, the trial is exploring the efficacy of DA-1241 independently, as well as in combination with sitagliptin, a DPP-4 inhibitor, which we believe will show synergistic effects compared to DA-1241, alone. Based on pre-clinical and clinical evidence generated to date, we continue to believe that DA-1241 has the potential to be a safe and effective treatment for MASH."

Third Quarter 2024 and Subsequent Highlights

Anticipated Clinical Milestones

Third Quarter Financial and Operating Results

R&D expenses were approximately $17.5 million for the nine months ended September 30, 2024, as compared to approximately $5.3 million for the nine months ended September 30, 2023. The approximately $12.2 million increase was primarily related to increased R&D activities related to Phase 2a clinical trial for DA-1241 and a Phase 1 trial for DA-1726 for the nine months ended September 30, 2024 when R&D activities were starting to ramp up following the acquisition of DA-1241 and DA-1726 in the fourth quarter of 2022. Specifically, the $12.2 million increase in R&D expenses was attributable to (i) $11.2 million in higher expenditures for clinical trials, investigational drug manufacturing costs, non-clinical and preclinical services, and consulting and (ii) $1.0 million in higher employee compensation and benefits. Included in R&D expenses for the nine months ended September 30, 2024 was $4.3 million of investigational drug manufacturing costs and non-clinical and preclinical expenses incurred under the Shared Services Agreement with Dong-A ST as compared to $2.2 million for the nine months ended September 30, 2023.

G&A expenses were approximately $5.7 million for the nine months ended September 30, 2024, as compared to approximately $4.9 million for the nine months ended September 30, 2022. The approximately $0.8 million increase was primarily attributable to $0.9 million in higher employee compensation and benefits, partially offset by $0.1 million in lower legal and professional fees.

Total other income was approximately $0.8 million for the nine months ended September 30, 2024, as compared to approximately $3.1 million for the nine months ended September 30, 2023. The approximately $2.3 million decrease was primarily attributable to $2.8 million in lower gain related to the change in fair value of warrant liabilities, partially offset by $0.5 million of higher interest income earned on our cash balance.

Net loss for the nine months ended September 30, 2024, was approximately $22.4 million, or $3.24 per basic and diluted share, based on 6,922,338 weighted average shares of common stock, basic and diluted, compared with a net loss of approximately $7.2 million, or $1.41 per basic and diluted share, based on 5,064,670 weighted average shares of common stock, basic and diluted, for the nine months ended September 30, 2023.

About NeuroBo Pharmaceuticals

NeuroBo Pharmaceuticals, Inc. is a clinical-stage biotechnology company focused on transforming cardiometabolic diseases. The Company is currently developing DA-1726 for the treatment of obesity, and is developing DA-1241 for the treatment of Metabolic Dysfunction-Associated Steatohepatitis (MASH). DA-1726 is a novel oxyntomodulin (OXM) analogue that functions as a glucagon-like peptide-1 receptor (GLP1R) and glucagon receptor (GCGR) dual agonist. OXM is a naturally-occurring gut hormone that activates GLP1R and GCGR, thereby decreasing food intake while increasing energy expenditure, thus potentially resulting in superior body weight loss compared to selective GLP1R agonists. DA-1241 is a novel G-protein-coupled receptor 119 (GPR119) agonist that promotes the release of key gut peptides GLP-1, GIP, and PYY. In pre-clinical studies, DA-1241 demonstrated a positive effect on liver inflammation, lipid metabolism, weight loss, and glucose metabolism, reducing hepatic steatosis, hepatic inflammation, and liver fibrosis, while also improving glucose control.

For more information, please visit www.neurobopharma.com.

Forward Looking Statements

Certain statements in this press release may be considered forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as "believes", "expects", "anticipates", "may", "will", "should", "seeks", "approximately", "potential", "intends", "projects," "plans", "estimates" or the negative of these words or other comparable terminology (as well as other words or expressions referencing future events, conditions or circumstances) are intended to identify forward-looking statements. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to risks and uncertainties. Many factors could cause actual future events to differ materially from the forward-looking statements in this press release, including, without limitation, those risks

associated with NeuroBo's ability to execute on its commercial strategy; the timeline for regulatory submissions; the ability to obtain regulatory approval through the development steps of NeuroBo's current and future product candidates; the ability to realize the benefits of the license agreement with Dong-A ST Co. Ltd., including the impact on future financial and operating results of NeuroBo; the cooperation of NeuroBo's contract manufacturers, clinical study partners and others involved in the development of NeuroBo's current and future product candidates; potential negative interactions between NeuroBo's product candidates and any other products with which they are combined for treatment; NeuroBo's ability to initiate and complete clinical trials on a timely basis; NeuroBo's ability to recruit subjects for its clinical trials; whether NeuroBo receives results from NeuroBo's clinical trials that are consistent with the results of pre-clinical and previous clinical trials; impact of costs related to the license agreement, known and unknown, including costs of any litigation or regulatory actions relating to the license agreement; the effects of changes in applicable laws or regulations; the effects of changes to NeuroBo's stock price on the terms of the license agreement and any future fundraising; and other risks and uncertainties described in NeuroBo's filings with the Securities and Exchange Commission, including NeuroBo's most recent Annual Report on Form 10-K. Forward-looking statements speak only as of the date when made. NeuroBo does not assume any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

NeuroBo Pharmaceuticals, Inc.

Marshall H. Woodworth

Chief Financial Officer

Rx Communications Group

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NeuroBo Pharmaceuticals, Inc.

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NeuroBo Pharmaceuticals, Inc.

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