Oslo, Norway, 29 April 2026 - Oncoinvent ASA (ONCIN), a biotech company
developing a receptor-independent alpha radiopharmaceutical to eradicate cancer
cells in the abdominal cavity after surgery with a single, targeted dose, is
hosting a live webcast at 8:00 AM CET today, Wednesday, 29 April 2026.

  · Presenters: CEO Øystein Soug, CFO Ramzi Amri
  · Time: 8:00am CET
  · Webcast link: https://qcnl.tv/p/ZTQdC_4834AF6CKrux8XCw

Highlights:

  · Recruited and randomized 37 patients (accumulated, ITT*) into the ovarian
Phase 2 trial
  · Secured new patent expanding protection for Radspherin[®]
  · Published positive final data from Phase 1 trial of Radspherin[®] to treat
ovarian cancer
    · Journal: Gynecologic Oncology
    · Conference: ESGO European Gynaecological Oncology Congress 2026

  · Appointed Dr Ramzi Amri as CFO

The presentation material and the recording of the webcast will be made
available at www.oncoinvent.com.

Oncoinvent reports its financial results on a half-yearly basis, complemented by
quarterly business updates to keep stakeholders informed and ensure ongoing
transparency.

For further information, please contact:

Oystein Soug, Chief Executive Officer
Email: IR@oncoinvent.com

About Oncoinvent

Oncoinvent is developing Radspherin[®], a receptor-independent alpha radiation
therapy that leverages the unique anatomy of the abdominal cavity to destroy
residual micrometastases using a single, highly localized dose of alpha
radiation. The initial clinical focus is treatment of ovarian and colorectal
cancer patients after surgical removal of the primary tumor and visible
metastases in the peritoneum, the thin membrane lining the abdominal cavity and
covering the abdominal organs.

This radiopharmaceutical is designed to prevent or delay recurrence in the
peritoneal cavity, keeping patients disease-free for longer than the current
standard of care and thereby also impacting overall survival. It is broadly
applicable to any cancer that spreads to the peritoneum, e.g. ovarian,
colorectal, and gastric cancers. Radspherin[®] stands out for its simplicity,
excellent safety profile, and seamless integration into existing surgical
workflows. Oncoinvent's product is easy to use, avoids systemic delivery and
significant toxicity. It is also differentiated in being simple to manufacture,
scalable, and supply de-risked.

Data from two trials in ovarian (phase 1) and colorectal (phase 1/2a) cancers,
are highly promising, showing an excellent safety profile and meaningful signals
of efficacy. Interim data from an ongoing, randomized, controlled phase 2
ovarian cancer trial is expected in 2026. With cost-effective manufacturing,
blockbuster potential, active pharma partnership momentum, plus strong
endorsements from leading experts, Oncoinvent is built for scale and commercial
success, and is set to become the new standard for post-surgical cancer care.
The Company was founded by the originators of Algeta and Xofigo (acquired by
Bayer).