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Spruce Biosciences Reports Second Quarter 2025 Financial Results and Provides Corporate Updates

Integrated Long-Term Clinical Data of Tralesinidase Alfa Enzyme Replacement Therapy (TA-ERT) Demonstrates Profound and Durable Efficacy and Safety in Patients with Sanfilippo Syndrome Type B (MPS IIIB)

Biologics License Application Submission of TA-ERT for MPS IIIB Anticipated in First Quarter of 2026

First Patient Dosed in Phase 2 TAMARIND Trial of Tildacerfont for Major Depressive Disorder (MDD) with Topline Results Anticipated in 1H 2026

Nasdaq Capital Market Relisting Anticipated Following Compliance with Minimum Bid Price for 20 Consecutive Trading Days

SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)-- Spruce Biosciences, Inc. (OTCQB: SPRB), a late-stage biopharmaceutical company focused on developing and commercializing novel therapies for neurological disorders with significant unmet medical need, today reported financial results for the second quarter ended June 30, 2025 and provided corporate updates.

鈥淲e remain steadfast in our efforts to advance TA-ERT as a potential first-to-market treatment for children diagnosed with Sanfilippo Syndrome Type B (MPS IIIB). We have a strong sense of urgency to deliver on our commitment to patients and families suffering with MPS IIIB and remain on track to submit the biologics license application under the accelerated approval pathway in the first quarter of 2026,鈥� said Javier Szwarcberg, M.D., M.P.H., Chief Executive Officer of Spruce Biosciences. 鈥淭he integrated long-term clinical data of TA-ERT reinforces its potentially transformative clinical impact and compelling value proposition. TA-ERT has the potential to be the first disease-modifying therapy to treat MPS IIIB and could provide a novel option for families impacted by this devastating condition.鈥�

Corporate Updates

• Integrated Long-Term Clinical Data of TA-ERT Demonstrates Profound and Durable Efficacy and Safety in Patients with MPS IIIB. Earlier today, Spruce announced integrated group-level efficacy data for cerebral spinal fluid heparan-sulfate non-reducing end (CSF HS-NRE), cortical grey matter volume (CGMV), and Bayley-III Cognitive Raw Score (BSID-C), the cognitive subscale of the Bayley Scales of Infant and Toddler Development - Third Edition, as well as safety data over a five-year period from clinical studies 201, 202, and 401. Data from treated patients (n=22) in the studies 201, 202, and 401 was compared with data from untreated patients with MPS IIIB in natural history studies 901 and 902.
  
  Integrated group-level data from clinical studies 201, 202, and 401 demonstrate that TA-ERT therapy significantly reduced to normal or near normal CSF HS-NRE levels over a five-year period. At 240 weeks, CSF HS-NRE decreased 91.5 ng/mL from baseline (95% CI: -102.10, -80.90; p<0.0001).
  
  TA-ERT was also associated with stabilized cognition. Untreated children in the natural history studies showed a decline in cognition beginning at approximately five years of age that progressively worsened over time, while cognition in the TA-ERT treated group remained stable. Using a model-based approach, the mean (95% CI) BSID-C over six to 10 years of age was significantly higher in patients treated with TA-ERT, relative to untreated, age-matched children, with differences evident at six years of age (group difference: 10.67, 95% CI: 3.23, 18.11; p=0.005). At 10 years of age, the difference in BSID-C scores between groups increased to 34.66 (95% CI: 24.38, 44.93; p<0.0001).
  
  TA-ERT therapy was also associated with stabilization of CGMV, relative to the decline in CGMV observed in untreated children due to the progressive neurodegenerative nature of MPS IIIB. While CGMV should increase with age in children up to five years of age, there was an average loss of ~32 mL over 48 weeks in untreated children with MPS IIIB observed in study 901. Consistent with TA-ERT鈥檚 mechanism of action, decreases in CGMV were observed during the initial 24 weeks of TA-ERT treatment, likely reflecting intracellular clearance of cerebral spinal fluid heparan sulfate (CSF HS) and CSF HS-NRE. CGMV stabilized from weeks 48 to 240 with TA-ERT treatment.
  
  TA-ERT therapy exposure for up to 7.3 years has demonstrated an adequate safety profile in a serious and fatal disease for which no treatment is currently available.
  

• First Patient Dosed in Phase 2 TAMARIND Trial of Tildacerfont for MDD with Topline Results Anticipated in 1H 2026. In 2024, Spruce entered into a license, development, and option agreement (the 鈥淗MNC Agreement鈥�) with HMNC Holding GmbH (HMNC). Under the terms of the HMNC Agreement, HMNC will fund and conduct a Phase 2 proof-of-concept study of tildacerfont, a potent and highly selective, oral, small-molecule antagonist of the CRF₁ receptor, in patients with MDD who will be screened using Cortibon, HMNC鈥檚 proprietary genetic test. HMNC has initiated the Phase 2 TAMARIND study, which will explore the efficacy of 400mg twice-daily tildacerfont versus placebo in improving depressive symptoms in MDD patients. TAMARIND targets a biologically distinct subtype of MDD patients linked to hypothalamic-pituitary-adrenal (HPA) axis dysregulation. Tildacerfont has the potential to address hyperactive brain corticotropin-releasing factor neurotransmission and aberrant functioning of the HPA axis in patients with MDD by blocking the CRF₁ receptor. Additionally, by utilizing genetic markers, HMNC鈥檚 companion diagnostic aims to identify MDD patients who are more likely to respond to CRF₁ receptor antagonism. Topline results from TAMARIND are anticipated in the first half of 2026.

• Nasdaq Capital Market Relisting Anticipated Following Compliance with Minimum Bid Price for 20 Consecutive Trading Days. The company implemented a 1-for-75 reverse stock split of its issued and outstanding shares of common stock (鈥淩everse Stock Split鈥�). The Reverse Stock Split was intended to bring the company into compliance with the minimum bid price requirement for continued listing on the Nasdaq Capital Market. The company鈥檚 common stock began trading on a split-adjusted basis on the OTCQB on August 7, 2025. The company鈥檚 common stock will resume trading on the Nasdaq Capital Market so long as the company remains in compliance with the minimum bid price requirement under Nasdaq Listing Rule 5450(a)(1) for 20 consecutive trading days.

Second Quarter 2025 Financial Results

• Cash and Cash Equivalents: Cash and cash equivalents as of June 30, 2025 were $16.4 million. Cash and cash equivalents are expected to allow the company to fund its current operating plan through the end of 2025.

• Research and Development (R&D) Expenses: R&D expenses for the three and six months ended June 30, 2025 were $(0.4) million and $10.4 million, respectively, compared to $8.1 million and $18.4 million for the same periods in 2024. R&D expenses for the three months ended June 30, 2025 include a reduction in recorded liabilities of $3.3 million and increase in receivables of $0.7 million associated with the acquisition of TA-ERT. R&D expenses for the six months ended June 30, 2025 also include a reduction in recorded liabilities of $3.4 million and increase in receivables of $0.7 million associated with the acquisition of TA-ERT, offset by $5.7 million in costs related to the acquisition of SPR202, an anti-corticotrophin releasing hormone monoclonal antibody for the treatment of congenital adrenal hyperplasia.

• General and Administrative (G&A) Expenses: G&A expenses for the three and six months ended June 30, 2025 were $3.1 million and $6.8 million, respectively, compared to $3.6 million and $7.9 million for the same periods in 2024, primarily driven by a decrease in stock-based compensation expense.

• Total Operating Expenses: Total operating expenses for the three and six months ended June 30, 2025 were $2.7 million and $17.2 million, respectively, compared to $11.6 million and $26.3 million for the same periods in 2024. Operating expenses include non-cash stock-based compensation expenses of $(0.1) million and $0.5 million for the three and six months ended June 30, 2025, respectively, compared to $1.7 million and $3.2 million for the same periods in 2024.

• Net Loss: Net loss for the three and six months ended June 30, 2025 was $2.1 million and $16.1 million, respectively, compared to $9.2 million and $20.8 million for the same periods in 2024.

About Spruce Biosciences

Spruce Biosciences is a late-stage biopharmaceutical company focused on developing and commercializing novel therapies for neurological disorders with significant unmet medical need. To learn more, visit and follow us on , , and.

Forward-Looking Statements

Statements contained in this press release regarding matters that are not historical facts are 鈥渇orward-looking statements鈥� within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include statements regarding, among other things, the ability to seek accelerated approval of TA-ERT for MPS IIIB based on existing clinical data; the timing and likelihood of regulatory filings and approvals for TA-ERT, including the anticipated biologics license application submission of TA-ERT for MPS IIIB in the first quarter of 2026; the potentially transformative clinical impact and compelling value proposition for TA-ERT; TA-ERT鈥檚 potential to be the first disease-modifying therapy to treat MPS IIIB as a novel treatment option; Spruce鈥檚 expectation that topline results from the TAMARIND study will be available in the first half of 2026; and the resumption of trading on the Nasdaq Capital Market. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Words such as 鈥渁nticipate鈥�, 鈥渨ill鈥�, 鈥減otential鈥�, 鈥渋ntend鈥�, 鈥渆xpect鈥� and similar expressions are intended to identify forward-looking statements. These forward-looking statements are based upon Spruce鈥檚 current expectations and involve assumptions that may never materialize or may prove to be incorrect. Actual results could differ materially from those anticipated in such forward-looking statements as a result of various risks and uncertainties, which include, without limitation, risks and uncertainties associated with Spruce鈥檚 business in general, the impact of geopolitical and macroeconomic events, and the other risks described in Spruce鈥檚 filings with the U.S. Securities and Exchange Commission. All forward-looking statements contained in this press release speak only as of the date on which they were made and are based on management鈥檚 assumptions and estimates as of such date. Spruce undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made, except as required by law.

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Media

Katie Beach Oltsik

Inizio Evoke Comms

(937) 232-4889

[email protected]

[email protected]

Investors

Samir Gharib

President and CFO

Spruce Biosciences, Inc.

[email protected]

Source: Spruce Biosciences, Inc.