Innate Pharma Reports Third Quarter 2025 Business Update and Financial Results

Regulatory News:

Innate Pharma SA (Euronext Paris: IPH; Nasdaq: IPHA) (“Innate” or the “Company”) today announced its business update and financial results for the first nine months of 2025.

“This quarter highlights strong execution across our key programs,” said Jonathan Dickinson, Chief Executive Officer of Innate Pharma. “With FDA clearance to initiate TELLOMAK-3, we are advancing lacutamab toward its confirmatory Phase 3 and potential accelerated approval in Sézary syndrome. We remain on track for dose-escalation data, from IPH4502, our Nectin-4 ADC, in the first half of 2026, followed by monalizumab PACIFIC-9 results in the second half of 2026. Together, these milestones position us well to deliver meaningful value for patients and shareholders as we continue to advance our differentiated portfolio.”

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1 Including short term investments (€6.1 million) and non-current financial instruments (€10.4 million).

Webcast and conference call will be held today at 2:00pm CET (8:00am ET)   The live webcast will be available at the following link: https://events.q4inc.com/attendee/424851735   Analysts may also join via telephone, click here to register   This information can also be found on the Investors section of the Innate Pharma website, www.innate-pharma.com. A replay of the webcast will be available on the Company website for 90 days following the event.

Pipeline highlights:

Strategic focus

As previously announced, Innate Pharma is prioritizing its investment on what it believes are its highest-value clinical assets, IPH4502, lacutamab, and monalizumab (partnered with AstraZeneca); and advancing the next Antibody Drug Conjugates (ADCs) toward development, leveraging its pipeline of innovative targets.

Lacutamab (anti-KIR3DL2 antibody):

Cutaneous T Cell Lymphoma

• The Company announced on November 10 that the U.S. Food and Drug Administration (FDA) has completed its review of the confirmatory Phase 3 protocol for lacutamab in cutaneous T-cell lymphomas (CTCL), with no further comments, clearing the trial to proceed.
• The planned confirmatory Phase 3 trial, TELLOMAK-3, is an open-label, randomized study designed to demonstrate the efficacy of lacutamab in patients with Sézary syndrome and Mycosis fungoides, who failed at least one prior line of systemic therapy. The trial will include two independent cohorts: one enrolling patients with Sézary syndrome post-mogamulizumab treatment randomized 1:1 to receive lacutamab or romidepsin, and one enrolling patients with Mycosis fungoides randomized 1:1 to receive lacutamab or mogamulizumab. The primary endpoint of the study for both cohorts is progression-free survival (PFS) evaluated by blinded central review.
• Data from the Phase 2 TELLOMAK trial in CTCL demonstrated durable activity, a favorable safety profile, and improvements in patients’ quality of life. With this feedback from FDA, the Company is progressing towards the initiation of the confirmatory Phase 3 TELLOMAK-3 trial in H1 2026. FDA provided encouraging initial feedback on Innate Pharma’s proposed regulatory pathway, which could potentially include Accelerated Approval for Sézary syndrome, once the Phase 3 trial is underway.
• The Company held a KOL event on October 28, 2025 on lacutamab and provided updates on the planned Phase 3 trial, the regulatory pathway in CTCL, and the commercial opportunity for lacutamab.

Peripheral T Cell lymphoma (PTCL)