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Innate Pharma Sobi pact closes, $75M upfront

Strategic lacutamab partnership with Sobi becomes effective, bringing Innate Pharma a USD 75 million upfront payment and launching the TELLOMAK-3 Phase 3 trial.

(Neutral)
(Neutral)
Form Type
6-K

Rhea-AI Filing Summary

Innate Pharma S.A. (IPHA) reports that its previously announced strategic partnership with Sobi for the T‑cell lymphoma drug candidate lacutamab is now effective, following expiration of applicable antitrust waiting periods and completion of other closing conditions. Transaction closing triggers a USD 75 million upfront payment to Innate and the initiation of the TELLOMAK-3 confirmatory Phase 3 study in cutaneous T‑cell lymphoma, with first patient expected in Q1 2027. Under the agreement, Innate will conduct TELLOMAK-3 to support applications for full approvals in Sézary syndrome and mycosis fungoides, while Sobi receives exclusive global commercialization rights to lacutamab upon potential accelerated approval and may assume full global development rights after positive Phase 3 results.

Positive

  • Partnership effectiveness with Sobi triggers a USD 75 million upfront payment to Innate Pharma, strengthening near-term liquidity.
  • Closing of the deal also launches the TELLOMAK-3 confirmatory Phase 3 trial in cutaneous T‑cell lymphoma, advancing lacutamab toward potential full approvals.
  • Sobi gains exclusive global commercialization rights to lacutamab upon potential accelerated approval, aligning a commercial partner behind the program.

Negative

  • None.

Filing Explained

Beyond the partnership update, this Form 6-K and Exhibit 99.1 are incorporated into Innate Pharma’s Form F-3 and Form S-8 registration statements, excluding the CEO quotation, webcast reference, and related links.

Upfront payment USD 75 million Triggered upon closing of the strategic partnership with Sobi for lacutamab
TELLOMAK-3 trial phase Phase 3 Confirmatory study in cutaneous T-cell lymphoma initiated upon transaction closing
First patient timing Q1 2027 Expected timing for first patient in TELLOMAK-3 confirmatory Phase 3 study
confirmatory Phase 3 study medical
"marks the initiation of the TELLOMAK-3 confirmatory Phase 3 study"
A confirmatory phase 3 study is a large clinical trial designed to provide definitive evidence that a medicine or medical device is effective and safe for its intended use, typically using randomized, controlled methods and predefined endpoints. It matters to investors because successful results are usually needed for regulatory approval and commercial launch, so the study’s outcome can strongly affect a product’s market value and a developer’s future revenue prospects.
cutaneous T-cell lymphoma medical
"TELLOMAK-3 Phase 3 confirmatory trial in cutaneous T-cell lymphoma"
Cutaneous T-cell lymphoma is a rare type of skin cancer that develops when certain immune system cells grow uncontrollably, causing skin patches, rashes, or tumors. While it primarily affects health, its rarity and complexity can influence medical research funding and pharmaceutical development, which may impact investment opportunities in healthcare and biotech sectors. Understanding such diseases helps investors gauge potential risks and innovations in medical treatments.
Sézary syndrome medical
"support applications for full approvals in key jurisdictions in Sézary syndrome"
mycosis fungoides medical
"full approvals in key jurisdictions in Sézary syndrome and mycosis fungoides"
Mycosis fungoides is a rare type of blood cancer in which a subtype of immune cells accumulates in the skin, producing persistent patches, thicker plaques, or tumors that can slowly progress and sometimes spread beyond the skin. It matters to investors because treatment options vary from topical creams and light therapy to systemic and targeted drugs, so new clinical results, approvals, or therapies can materially change demand, pricing and company prospects—like a new tool reshaping an established market.
antibody-drug conjugates (ADCs) medical
"Its proprietary pipeline is centered on antibody-drug conjugates (ADCs)"
Antibody-drug conjugates (ADCs) are advanced medicines that combine a targeted antibody with a powerful drug, acting like a guided missile to deliver treatment directly to cancer cells while sparing healthy tissue. This precision approach can improve effectiveness and reduce side effects, making ADCs a promising area of biotech innovation. For investors, advancements in ADC technology can signal potential growth opportunities in the pharmaceutical and healthcare sectors.
accelerated approval regulatory
"exclusive global rights to commercialize lacutamab upon potential accelerated approval"
Accelerated approval is a process that allows new medical treatments to be approved more quickly than usual if they address serious or life-threatening conditions and show promising early results. For investors, it signals that a treatment may reach the market sooner, potentially boosting a company's prospects, but it also involves some uncertainty since full evidence of effectiveness is still being gathered.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Innate Pharma (IPHA) announce regarding its partnership with Sobi?

Innate Pharma announced that its strategic partnership with Sobi for lacutamab in T‑cell lymphoma is now effective after antitrust waiting periods expired and other conditions were completed, triggering the USD 75 million upfront payment and initiation of the TELLOMAK-3 Phase 3 trial.

How much upfront cash does Innate Pharma (IPHA) receive from the Sobi deal?

Transaction closing triggers a USD 75 million upfront payment to Innate Pharma from Sobi, as part of their strategic partnership to develop and commercialize lacutamab in T‑cell lymphoma.

What is the TELLOMAK-3 study mentioned by Innate Pharma (IPHA)?

TELLOMAK-3 is a confirmatory Phase 3 trial in cutaneous T‑cell lymphoma conducted by Innate Pharma. It is intended to support applications for full approvals in Sézary syndrome and mycosis fungoides, with the first patient expected in Q1 2027.

What rights does Sobi obtain over lacutamab in the Innate Pharma (IPHA) agreement?

Sobi receives exclusive global rights to commercialize lacutamab upon potential accelerated approval and may assume full global development rights following positive Phase 3 results, under its strategic partnership with Innate Pharma.

What role does Innate Pharma (IPHA) retain in lacutamab development?

Innate Pharma is responsible for conducting the TELLOMAK-3 Phase 3 confirmatory trial in cutaneous T‑cell lymphoma, which is expected to support full approval applications in Sézary syndrome and mycosis fungoides.

When is the first patient in TELLOMAK-3 expected to be enrolled, according to Innate Pharma (IPHA)?

Innate Pharma states that the first patient in the TELLOMAK-3 confirmatory Phase 3 study is expected in Q1 2027, following the effectiveness of the partnership with Sobi.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

Date of report: September 16, 2026
Commission File Number: 001-39084
Innate Pharma S.A.
(Translation of registrant's name into English)

Innate Pharma S.A.
117 Avenue de Luminy—BP 30191
13009 Marseille, France
+ 33 (0) 4 30 30 30
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F [ X ]    Form 40-F [ ]

INCORPORATION BY REFERENCE

This Report on Form 6-K and Exhibit 99.1 to this Report on Form 6-K (excluding the quotation from Jonathan Dickinson, Chief Executive Officer at Innate Pharma, the reference to the live webcast, and the related Internet and telephone links) shall be deemed to be incorporated by reference into the registration statement on Form F-3 (File No. 333-276164) and registration statement on Form S-8 (File No. 333-282031) of Innate Pharma S.A. (including any prospectuses forming a part of such registration statements) and to be a part thereof from the date on which this report is furnished, to the extent not superseded by documents or reports subsequently filed or furnished.




EXHIBIT INDEX

Exhibit    Description

99.1    Press Release dated September 16, 2026




SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

INNATE PHARMA S.A.


Date: September 16, 2026    By:    /s/ JONATHAN DICKINSON     Name:    Jonathan Dickinson
Title:    Chief Executive Officer



EXHIBIT 99.1


INNATE AND SOBI ANNOUNCE PARTNERSHIP IS NOW EFFECTIVE FOLLOWING COMPLETION OF CLOSING CONDITIONS

Marseille, France, September 16, 2026


The partnership between Sobi and Innate is now effective, following expiration of the anti-trust waiting periods and completion of other conditions

Transaction closing triggers the USD 75 million upfront payment and marks the initiation of the TELLOMAK-3 confirmatory Phase 3 study, with first patient expected in Q1 2027

Innate Pharma SA (Euronext Paris: IPH; Nasdaq: IPHA) (“Innate” or the “Company”) today announced that the previously announced strategic partnership with Sobi is now effective following the expiration of applicable antitrust waiting periods and completion of other conditions.

As announced on August 10, 2026, Innate Pharma entered a strategic partnership with Sobi to license lacutamab in T-cell lymphoma. Transaction closing triggers the USD 75 million upfront payment and marks the initiation of the TELLOMAK-3 confirmatory Phase 3 study, with first patient expected in Q1 2027.

Under the agreement, Innate is conducting the TELLOMAK-3 Phase 3 confirmatory trial in cutaneous T-cell lymphoma. The TELLOMAK-3 study will subsequently support applications for full approvals in key jurisdictions in Sézary syndrome and mycosis fungoides, the most common subtype. Sobi will receive exclusive global rights to commercialize lacutamab upon potential accelerated approval and will be eligible to assume full global development rights following positive Phase 3 results.

About Innate Pharma
Innate Pharma S.A. is a global, clinical-stage biotechnology company developing immunotherapies for cancer patients. Leveraging its expertise in antibody-engineering and innovative target identification, Innate Pharma is developing innovative and differentiated next-generation antibody therapeutics.
Innate Pharma is advancing a portfolio of differentiated potential first- and/or best-in-class assets, focused on areas of high unmet medical need. Its proprietary pipeline is centered on antibody-drug conjugates (ADCs), led by IPH4502, a differentiated Nectin-4 ADC in clinical development for solid tumors, and supported by a preclinical portfolio of next-generation ADC candidates. In parallel, Innate is advancing two partnered late-stage assets: lacutamab, developed with Sobi for T-cell lymphomas, and monalizumab, developed with AstraZeneca for non-small cell lung cancer (NSCLC).
Innate Pharma has established collaborations with leading biopharmaceutical companies, including Sobi, Sanofi and AstraZeneca, as well as renowned academic and research institutions, to advance innovation in immuno-oncology.
Headquartered in Marseille, France, Innate Pharma is listed on Euronext Paris and Nasdaq in the US.
Learn more about Innate Pharma at www.innate-pharma.com and follow us on LinkedIn and X.

Information about Innate Pharma shares
ISIN code: FR0010331421
Ticker code: Euronext Paris: IPH | Nasdaq: IPHA



LEI: 9695002Y8420ZB8HJE29

Disclaimer on forward-looking information and risk factors
For a discussion of risks and uncertainties, please refer to the Risk Factors (“Facteurs de Risque") section of the Universal Registration Document filed with the French Financial Markets Authority (“AMF”), which is available on the AMF website http://www.amf-france.org or on Innate Pharma’s website, and public filings and reports filed with the U.S. Securities and Exchange Commission (“SEC”), including the Company’s Annual Report on Form 20-F for the year ended December 31, 2025, and subsequent filings and reports filed with the AMF or SEC, or otherwise made public by the Company. References to the Company’s website and the AMF website are included for information only and the content contained therein, or that can be accessed through them, are not incorporated by reference into, and do not constitute a part of, this press release.
This press release and the information contained herein do not constitute an offer to sell or a solicitation of an offer to buy or subscribe to shares in Innate Pharma in any country.

Contacts
Stéphanie Cornen
VP, Investor Relations & Corporate Communications
stephanie.cornen@innate-pharma.fr 

Investor Relations 
investors@innate-pharma.fr 

Media 
communication@innate-pharma.fr 


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