Sareum Holdings PLC

("Sareum" or the "Company")

Half-Year Report for the Six Months Ended 31 December 2023

Cambridge, UK, 28 March 2024 - Sareum Holdings plc (AIM: SAR), a biotechnology company developing next generation kinase inhibitors for autoimmune disease and cancer, announces its unaudited results for the six months ended 31 December 2023.

Sareum also provides a broader update on its operational activities and pipeline progress.

OPERATIONAL HIGHLIGHTS - INCLUDING POST-PERIOD UPDATES

SDC-1801 (autoimmune disease)

SDC-1801 is a TYK2/JAK1 inhibitor being developed as a potential new therapeutic for a range of autoimmune diseases with an initial focus on psoriasis, an autoimmune condition affecting the skin.

·    After the period end, Sareum announced the completion of the single ascending dose (SAD) element and the food effect study of a Phase 1a clinical trial for the lead programme SDC-1801.

·    Preliminary blinded safety, tolerability and pharmacokinetics data from the trial indicate a favourable profile and support once daily oral dosing of patients.

·    These preliminary results indicate that SDC-1801 has the potential to achieve therapeutically effective dose levels with no serious adverse events.

·    The multiple ascending dose (MAD) study of SDC-1801 is ongoing and topline data from the Phase 1a clinical trial are expected to be available during Q2 2024.

·    Sareum's intellectual property portfolio has been strengthened with patent grants in China in June 2023 and Japan in November 2023. Post-period, in March 2024, the European Patent Office has issued a Notice of Allowance for a patent relating to SDC‐1801.

SDC-1802 (cancer immunotherapy)

SDC-1802 is a TYK2/JAK1 inhibitor being developed for cancer immunotherapy.

·    Sareum continued to work on the translational studies needed to support development of SDC-1802 during the period, in order define the optimal cancer application before completing toxicology and manufacturing studies, but the Company will now focus its resources on the clinical development of SDC-1801.

SRA737 (cancer)

SRA737 is a clinical-stage oral, selective Checkpoint kinase 1 inhibitor that targets cancer cell replication and DNA damage repair mechanisms.

·    After the period end, on 2 January 2024, Sareum announced the Company's co-development partner, the CRT Pioneer Fund ("CPF"), has entered into a development and commercialisation licence agreement for SRA737 with a private biopharma company based in the United States.

·    Under the terms of Sareum's co-development agreements with CPF and Cancer Research Technology Ltd, Sareum is entitled to receive 27.5% of any income arising from this licensing of the SRA737 programme.

·    Post period end, Sareum earned US$137,500 pursuant to the upfront fee payable under the Licensing Agreement. The Company is also entitled to receive 27.5% of any future payments payable by the Licensee Company (including any Consideration Shares received), under the terms of the Licensing Agreement.

FINANCIAL HIGHLIGHTS

•     Cash at 31 December 2023 of £0.4m (£2.9m as of 31 December 2022 and £1.0m as of 30 June 2023).

•     Loss on ordinary activities after taxation for the six months ended 31 December 2023 of £2.5m, reflecting increased investment in clinical studies and a finance charge resulting from the Riverfort facility (2022: loss of £1.4m).

•     Post period end a UK R&D tax credit of £0.4m received in January 2024.

•     Post period end, the Company is today announcing a conditional equity fundraise of up to £1.5m (before expenses), via the issue of a total of up to 15,000,000 new ordinary shares of 1.25 pence each in the capital of the Company ("Ordinary Shares") at a price of 10 pence per new Ordinary Share (the "Placing Price") (the "Fundraise").

•     Up to £0.3m of the total Fundraise will be offered to retail shareholders via the Winterflood Retail Access Platform through the issue of new Ordinary Shares at the Placing Price.

Dr Tim Mitchell, Chief Executive Officer of Sareum, commented:

"Sareum is making steady progress with the ongoing trial of SDC-1801 and the data we have seen so far support our confidence that it has the potential to deliver therapeutically effective dose levels with no serious adverse events.

"More broadly, we're increasingly encouraged by the potential of the TYK2/JAK1 class, both from a scientific and commercial perspective."

"With the additional funding that will be announced today, we are well placed to complete the Phase 1a clinical trial of SDC-1801."

"We look forward to the topline data from the MAD part of our Phase 1a clinical trial in Q2 2024, and to continuing to progress this promising molecule through clinical development."  

For further information, please contact: 

About Sareum

Sareum (AIM: SAR) is a biotechnology company developing next generation kinase inhibitors for autoimmune disease and cancer.

The Company is focused on developing next generation small molecules which modify the activity of the JAK kinase family and have best-in-class potential. Its lead candidate, SDC-1801, simultaneously inhibits TYK2 and JAK1. SDC-1801 is a potential treatment for a range of autoimmune diseases, and is planned to enter clinical development with an initial focus on psoriasis.

Sareum is also developing SDC-1802, a TYK2/JAK1 inhibitor with a potential application for cancer immunotherapy.

Sareum Holdings plc is based in Cambridge, UK, and is quoted on the AIM market of the London Stock Exchange, trading under the ticker SAR. For further information, please visit the Company's website at www.sareum.com

CHAIRMAN'S STATEMENT

Sareum has made good progress during and after this period progressing its lead clinical asset, SDC-1801, through a Phase 1a study. The single ascending dose (SAD) part and the food effect study of SDC-1801 have progressed well, giving the Company continued confidence over the clinical momentum in the trial and optimism as we move towards the completion the study.

The multiple ascending dose (MAD) portion of SDC-1801 is nearing completion. Sareum aims to conclude this part of the trial by  the end of Q2 2024. Subject to data review, additional funding and/or potential licencing opportunities, we endeavour to be in a position to commence a Phase 2a study in psoriasis patients before the end of 2024.

It is becoming increasingly clear that the TYK2/JAK1 class offers great potential for the treatment of autoimmune disease, with potential for broad coverage and increased efficacy across key targets, lower toxicity and potentially stronger efficacy. We believe SDC-1801 has the potential to be a best-in-class TYK2/JAK1 inhibitor for autoimmune diseases and we're excited about its progress in this ongoing clinical study. While the MAD study is still in progress, interim data shows that levels of SDC-1801 in blood are already in the expected therapeutic range, and achieve concentrations greater than those predicted to reduce signalling of cytokines dependent on TYK2 and/or JAK1 activity by 50% for a sustained period following once daily oral dosing. Safety data remains blinded, but no serious adverse events have been reported to date.

We were also encouraged that, after the period end, Sareum's co-development partner, the CPF entered into a development and commercialisation license agreement for SRA737 with a private biopharma company based in the US.  We are delighted that a partner has been identified to take this molecule forward into further development.

We look forward to providing further updates in due course.  

PROGRAMME UPDATES

SDC-1801

SDC-1801 is a TYK2/JAK1 inhibitor being developed as a potential new therapeutic for a range of autoimmune diseases with an initial focus on psoriasis, an autoimmune condition affecting the skin.

SDC-1801 is currently in a Phase 1a trial, designed to investigate the safety, tolerability, pharmacokinetics and pharmacodynamics of an oral formulation of SDC-1801 in healthy subjects (trial ID ACTRN12623000416695p). This is a randomised, placebo-controlled trial with single and multiple ascending oral dose studies. This trial includes a single ascending dose study (Part 1), a multiple ascending dose study (Part 2) and a food effects study (Part 3).

Dosing of the final subjects in the SAD part of the trial has now concluded and the safety review committee for the trial has reviewed available data. The SAD study randomised participants in a 3:1 ratio to a single dose of SDC-1801 or placebo in six dose cohorts. Preliminary blinded safety, tolerability and pharmacokinetics data from the trial indicate a favourable profile and support one daily oral dosing of patients. These preliminary results indicate that SDC-1801 has the potential to achieve therapeutically effective dose levels with no serious adverse events.

The food effect study part of the trial has also been completed. The results of this study demonstrated no significant food effect on SDC-1801 blood levels, which will allow full flexibility in dose timing in future clinical studies.

The MAD study is nearing completion and topline data from the Phase 1a clinical trial are expected to be available during Q2 of 2024. If the results are satisfactory, the Company plans to assess funding and licensing options to further the development of SDC-1801 through a Phase 2a trial.

The goal of the proposed Phase 2a trial would be to recruit up to 24 psoriasis patients, with the study expected to be started by the end of 2024.

SDC-1802

SDC-1802 is a TYK2/JAK1 inhibitor being developed for cancer and cancer immunotherapy applications.

The Company is now prioritising existing resources on the clinical development of its lead product, SDC-1801.

FINANCIAL REVIEW

At 31 December 2023 Sareum had cash of £0.4m (2022: £2.9m) and subsequently received a UK R&D tax credit of £0.4m in January 2024.

The loss on ordinary activities after taxation for the six months ended 31 December 2023 was £2.5m (2022: loss of £1.4m), reflecting ongoing clinical trial preparation costs and a finance charge resulting from the Riverfort facility.

As announced on 12 March 2024, due to downward pressure on the Company's share price, Sareum was unable to draw down the third prepayment of £0.3m under the Equity Prepayment Facility with RiverFort entered into on 3 August 2023 (the "Facility"). The Company is today announcing a conditional equity fundraise of up to £1.5m (before expenses), via the issue of a total of up to 15,000,000 new Ordinary Shares at the Placing Price of 10 pence per new Ordinary Share (the "Fundraise").  The net proceeds from the Fundraise are intended to be used by the Company to complete its SDC-1801 Phase 1a clinical studies and, together with the receipt of anticipated R&D tax credits in the amount of £0.7m which is expected in September 2024, for general working capital purposes.

Furthermore, as part of the Company's ongoing steps to minimise its cash utilisation, certain Directors and advisers have agreed to settle cash amounts owed in new Ordinary Shares and the Directors have agreed to defer a portion of their salaries going forward, so as to ensure the completion of the SDC-1801 Phase 1a clinical trial can be achieved. Further details will be included in the Company's announcement regarding the Fundraise.

The Company has drawn £2.3m to date pursuant to the Facility from two prepayment deposits.   Any amounts drawn under the Facility are due for settlement by August 2025 (the "Maturity Date"), either by the issues of shares or repayment in cash. As at 31 December 2023 there was a balance of £1.6m remaining to be settled, and as of 26 March 2024 this balance was £1.1m. The Company expects to settle this by the issuance of shares or cash payment prior to the Maturity Date. No further drawdown are expected to be made under the Facility.

OUTLOOK

Sareum has successfully completed the SAD segment and the food effect study of its Phase 1a clinical trial for its leading program, SDC-1801. These initial findings suggest that SDC-1801 has the potential to reach therapeutically effective dosage levels without causing any serious adverse events.

The MAD portion of SDC-1801 is nearing completion. The Fundraise announced today along with certain cash cost savings being implemented, will provide the Company with sufficient capital to complete its Phase 1a clinical trial and topline data from the Phase 1a trial are expected to be available by the end of Q2 2024. If the results are satisfactory, the Company plans to assess funding and licensing options to further the development of SDC-1801 through a Phase 2a trial.

Our preclinical findings and the growing commercial and scientific momentum building around the TYK2/JAK1 class, support our continued excitement about the potential for SDC-1801 to be a superior option to approved oral therapies for the treatment of autoimmune diseases.

The Board of Sareum continues to apply a rigorous approach to capital allocation to the development of our assets, particularly in the current challenging economic environment, and maintains a clear focus on bringing these medicines to patients as efficiently as possible, while maximising value for shareholders.