Ligand Pharmaceuticals Incorporated and Agenus Inc. announced that the companies have entered into a royalty financing agreement to support Agenus? key development initiatives in the ongoing BOT/BAL clinical development program, including its planned confirmatory Phase 3 trial in its lead indication of patients with metastatic, relapsed/refractory colorectal cancer not microsatellite instability-high (MSI-H) or deficient mismatch repair (dMMR), who are without active liver metastases (r/r MSS CRC NLM), along with other launch readiness activities. Under the terms of the agreement, Ligand will pay $75 million to Agenus at closing.

In addition, Ligand has the option to invest an additional $25 million on the same terms on a pro rata basis. In return for the initial $75 million payment, Ligand will receive 18.75% of the future royalties and 31.875% of the future milestone payments related to six of Agenus? clinical-stage partnered oncology programs, including BMS-986442 (Bristol Myers Squibb), AGEN2373 (Gilead Sciences), INCAGN2385 and INCAGN2390 (Incyte), MK-4830 (Merck), and UGN-301 (UroGen Pharma).

Ligand?s portion of the milestones related to these six programs has the potential to exceed $400 million, with royalties in the low single digits. In addition, Ligand will also receive a 2.625% royalty on future global net sales generated by BOT/BAL. The royalties and milestone payments owed to Ligand could be adjusted up or down based upon pre-determined future events and achievements of certain milestones.

As part of the agreement, the companies have also agreed to allow Agenus to syndicate up to an additional $125 million, potentially bringing the total capital infusion up to $200 million. This strategic collaboration will further validate BOT/BAL?s potential as a transformative treatment for patients with solid tumor malignancies and enhances Agenus? ability to advance this promising therapy.

Over 900 patients have been treated with BOT/BAL in clinical trials across nine different difficult to treat solid tumor cancers. The novel therapeutic regimen has demonstrated the potential to be combined with chemotherapy and other standard of care therapies, and as an immunotherapy-only combo in CRC, one of the most prevalent solid tumors globally. In April 2023, Agenus was granted Fast Track Designation from the U.S. Food and Drug Administration (FDA) for the investigation of the BOT/BAL combination in patients with r/r MSS CRC NLM.

Patients targeted with this designation are heavily pretreated with standard of care chemotherapy, anti-VEGF and anti-EGFR if RAS wild type.