Sotio

Czech biotechnology company

SOTIO

Industry| Biotechnology, Pharmaceutical
Founded| 2010
Founder| Petr Kellner
Headquarters|

Prague

Czech Republic

Key people

| Radek Spisek, Ph.D., CEO
Revenue| 176,068,000 Czech koruna (2021)

Operating income

| −319,386,000 Czech koruna (2021)

Net income

| −344,344,000 Czech koruna (2021)
Total assets| 6,689,850,000 Czech koruna (2021)

Number of employees

| 200
Website| https://www.sotio.com/

SOTIO Biotech[1] is a clinical-stage biotechnology company focused on research and development of next-generation cancer immunotherapies, with operations in Europe and North America.[2] The company has clinical programs which include a superagonist of the immuno-oncology target IL-15, a new generation of potent and stable antibody-drug conjugates (ADCs), a proprietary technology designed to improve on the efficacy of CAR T therapies and a platform to streamline and enhance personalized cell therapies.[3]

## Founding

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The company was founded in 2010 and in 2012 became part of PPF Group, established by Petr Kellner.[4] The CEO of the company is Radek Špíšek, who has been with the company since its beginning, initially functioning as Chief Scientific Officer.[5]

## Operations

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SOTIO operates globally, with offices in Prague, Czech Republic, Basel, Switzerland and Boston, USA.[6]

## Pipeline

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SOTIO is currently developing and testing multiple oncology products at different stages of preclinical and clinical development.[7]

### Immunocytokines

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SOTIO is developing SOT201, an immunocytokine fusing a proprietary IL-15 superagonist to an anti-PD-1 antibody. As a PD-1-targeted and cis-acting attenuated IL-15 agonist, SOT201 is designed to preferentially activate PD-1+CD8+ T cells, inducing superior anti-tumor effects and reinvigorating exhausted CD8+ T cells in PD-1 sensitive and resistant tumors. SOT201 entered the clinic in May 2024 with the Phase 1 VICTORIA-01 clinical trial.[8]

### BOXR

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SOTIO's BOXR cell therapy platform is designed to improve functionality of engineered T cells by discovering novel “bolt-on” transgenes that can be co-expressed with tumor-targeting receptors to overcome resistance and improve the function of T cells in the solid tumor microenvironment.[9]

Lead candidate BOXR1030 uniquely combines the BOXR-discovered GOT2 transgene, a critical enzyme involved in cellular metabolism, with CAR T technology. BOXR1030 is designed to improve CAR T therapy function in the microenvironment by enhancing T cell fitness in the solid tumor microenvironment. Tumor infiltrating lymphocytes isolated from the tumors of treated animals revealed that BOXR1030 cells were more resistant to dysfunction and had fewer markers of exhaustion as compared to the control CAR T cells.[10][11] BOXR1030 entered the clinic in 2023 with the Phase 1/2 DUET-01 clinical trial.[12]

### Antibody Drug Conjugates

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SOTIO is advancing a pipeline of antibody-drug conjugates (ADCs) to treat solid tumors through collaborations with Biocytogen, Synaffix, LigaChem, and NBE-Therapeutics.[13][14] Its two most advanced ADC therapeutic candidates are SOT109 (anti-CDH17 ADC) and SOT106 (anti-LRRC15 ADC).[15]

## Investments

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SOTIO has its own scientific research and development and also collaborates with other partners. In recent years, SOTIO and PPF have focused also on investing in biotechnology companies developing innovative anticancer treatments in Europe and the US.

At the end of 2020, PPF sold its stake in NBE-Therapeutics, a company developing innovative ADC products for the treatment of solid tumours, to the leading global pharmaceutical company Boehringer Ingelheim. This deal, the largest of its kind to be witnessed in Europe in ten years, showed the value of the ADCs that SOTIO maintains in its portfolio and that it continues to develop.

SOTIO is also managing PPF's investments in biotechnology companies Autolus Therapeutics and Cellestia Biotech.[16]

## References

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1. ^ SOTIO, Biotech. "The Company". Sotio. Retrieved 2022-03-15.
2. ^ "An In-Depth Look at Innovation on Cancer Research Day". BioSpace. Retrieved 2022-03-15.
3. ^ "SOTIO's Quest To Build A Global Biopharma". bioprocessonline.com. Retrieved 2022-03-15.
4. ^ "SOTIO Arms Dendritic Cells for Immunotherapy Against Cancer". WuXi XPress. Retrieved 2022-03-15.
5. ^ "Leadership". Sotio. Retrieved 2022-03-15.
6. ^ "Czech PPF Group biotech firms begin trials to extend lives of cancer patients". Radio Prague International. 2019-07-11. Retrieved 2022-03-15.
7. ^ "SOTIO Biotech Pipeline". Sotio. Retrieved 2022-03-15.
8. ^ s.r.o, ANDWEB. "SOTIO Showcases New Data on SOT201 Immunocytokine, VICTOR..." Sotio. Retrieved 2025-06-19.
9. ^ "Sotio licences Unum Therapeutics' CAR-T cell portfolio". european-biotechnology.com. 31 August 2020. Retrieved 2022-03-15.
10. ^ s.r.o, ANDWEB. "BOXR1030". Sotio. Retrieved 2025-06-29.
11. ^ "Personalized cell therapies offer hope for some of the toughest cancers". ScienceBoard.net. Retrieved 2022-03-15.
12. ^ s.r.o, ANDWEB. "SOTIO Presents Overview of DUET-01 Phase 1/2 Study at ASC..." Sotio. Retrieved 2025-06-29.
13. ^ "PPF Group | SOTIO Expands its Antibody-Drug Conjugate Pipeline with Exclusive Collaboration and License Agreement with LegoChem Biosciences". PPF Group. Retrieved 2025-06-29.
14. ^ Taylor, Nick Paul (2025-03-13). "Sotio takes up option on ADCs, Boehringer inks discovery pact". www.fiercebiotech.com. Retrieved 2025-06-29.
15. ^ Spencer, Diana (2025-05-07). "ADCs show best-in-class potential for treating solid tumours". Drug Discovery World (DDW). Retrieved 2025-06-29.
16. ^ "Sotio". PPF Group. Retrieved 2022-03-15.