Will add UNLOXCYT™ (cosibelimab-ipdl), the first and only FDA-approved anti-PD-L1 treatment for metastatic or locally advanced cutaneous squamous cell carcinoma (cSCC) to Sun Pharma’s global onco-derm franchise

Will leverage Sun Pharma’s global presence to accelerate patient access to UNLOXCYT™ (cosibelimab-ipdl)

Upfront cash payment of $4.10 per share of common stock, representing aggregate upfront consideration of up to $355 million

Stockholders will also receive a contingent value right for up to $0.70 per share on achievement of a milestone

Acquisition is subject to approval by Checkpoint’s stockholders and other customary closing conditions

MUMBAI, India and WALTHAM, MA, USA I March 9, 2025 I Sun Pharmaceutical Industries Limited (Reuters: SUN.BO, Bloomberg: SUNP IN, NSE: SUNPHARMA, BSE: 524715 (together with its subsidiaries and/or associated companies, “Sun Pharma”)) and Checkpoint Therapeutics, Inc. (Nasdaq: CKPT) (“Checkpoint”) today announced that they have entered into an agreement by which Sun Pharma will acquire Checkpoint, an immunotherapy and targeted oncology company.

Checkpoint is a Nasdaq-listed commercial-stage company focused on developing novel treatments for patients with solid tumor cancers. Checkpoint has received approval from the U.S. Food & Drug Administration (FDA) for UNLOXCYT™ (cosibelimab-ipdl) for the treatment of adults with metastatic cutaneous squamous cell carcinoma (cSCC) or locally advanced cSCC who are not candidates for curative surgery or curative radiation.

Dilip Shanghvi, Chairman & Managing Director of Sun Pharma, said, “Combining UNLOXCYT, an FDA-approved anti-PD-L1 treatment for advanced cutaneous squamous cell carcinoma, with Sun Pharma’s global presence means patients with cSCC may soon have access to an important, new treatment option. The acquisition further bolsters our innovative portfolio in onco-derm therapy.”

“I am proud of the dedication and passion of our team at Checkpoint that allowed us to achieve the first and only FDA-approved anti-PD-L1 treatment for patients with advanced cSCC, and we are excited to enter this transaction with Sun Pharma as the next step to bringing UNLOXCYT to cSCC patients in need of a differentiated immunotherapy treatment option,” said James Oliviero, President and Chief Executive Officer of Checkpoint. “Sun Pharma is aligned with Checkpoint’s commitment to improving the lives of skin cancer patients, and I believe this transaction will maximize value for our stockholders and provide accelerated access to UNLOXCYT in the United States, Europe and other markets worldwide.”

Transaction Summary

Upon completion of the transaction, Sun Pharma will acquire all outstanding shares of Checkpoint and Checkpoint stockholders will receive, for each share of common stock they hold, an upfront cash payment of $4.10, without interest, and a non-transferable contingent value right (CVR) entitling the stockholder to receive up to an additional $0.70 in cash, without interest, if cosibelimab is approved prior to certain deadlines in the European Union pursuant to the centralized approval procedure or in Germany, France, Italy, Spain or the United Kingdom, subject to the terms and conditions in the contingent value rights agreement. 

The upfront cash payment of $4.10 per share of common stock represents a premium of approximately 66.0% to Checkpoint’s closing share price on March 7, 2025, the last trading day prior to today’s announcement.

In connection with the transaction, Checkpoint, Sun Pharma and Fortress Biotech, Inc., Checkpoint’s controlling stockholder (“Fortress”; Nasdaq: FBIO), have entered into a royalty agreement, under which following the closing of the transaction Fortress would be entitled to receive royalty payments based on future sales of cosibelimab during a specified term, in lieu of royalty rights that were granted to Fortress in connection with its founding of Checkpoint.

In connection with the evaluation of Checkpoint’s strategic alternatives, the Checkpoint board of directors (the “Board”) formed a special committee of independent and disinterested directors (the “Special Committee”), which led the review and negotiations for this transaction. The Special Committee, with the assistance of its independent financial and legal advisors, conducted a comprehensive review of potential strategic alternatives available to Checkpoint and ultimately determined that the compelling and certain cash consideration and meaningful upside presented by the CVRs in this transaction provides superior risk-adjusted value relative to Checkpoint’s standalone prospects and other available alternatives. The Special Committee unanimously approved, and recommended that Checkpoint’s Board approve, the proposed transaction. After considering this recommendation, Checkpoint’s Board unanimously approved the proposed transaction. In arriving at its unanimous recommendation in favor of the transaction, the Special Committee considered several additional factors which will be outlined in public filings to be made by Checkpoint.

The transaction is expected to be completed in the second calendar quarter of 2025. The transaction is subject to customary closing conditions, including required regulatory approvals and approval by the holders of a majority of the voting power of outstanding shares of Checkpoint common stock, and by the holders of a majority of the shares of Checkpoint common stock that are not held by Fortress or by certain other affiliates of Checkpoint.

For the nine-month period ending September 2024, Checkpoint reported $0.04 million in revenue and a net loss of $27.3 million. The R&D expense for the nine-month period was $19.3 million. As of September 30, 2024, Checkpoint had a cash balance of $4.7 million, outstanding accounts payable and accrued expenses of $15.6 million, and outstanding accounts payable and accrued expenses – related party of $2.0 million.

In connection with the transaction, Fortress, which holds a majority of Checkpoint’s outstanding voting power, has agreed to vote in favor of the transaction.

Advisors

Barack Ferrazzano Kirschbaum & Nagelberg LLP and Allen Overy Shearman Sterling US LLP are serving as legal advisors to Sun Pharma.

Locust Walk is serving as the exclusive financial advisor to Checkpoint and lead financial advisor to Checkpoint on the transaction.

Cooley LLP and Morris, Nichols, Arsht & Tunnell LLP are serving as legal advisors to the Special Committee. Kroll, LLC is serving as financial advisor to the Special Committee.

Alston & Bird LLP is serving as legal advisor to Checkpoint.

About Cutaneous Squamous Cell Carcinoma

cSCC is the second-most common type of skin cancer in the United States, with an estimated annual incidence of approximately 1.8 million cases according to the Skin Cancer Foundation. Important risk factors for cSCC include chronic ultraviolet exposure and immunosuppressive conditions. While most cases are localized tumors amenable to curative resection, each year approximately 40,000 cases become advanced and an estimated 15,000 people in the United States die from this disease. In addition to being a life-threatening disease, cSCC causes significant functional morbidities and cosmetic deformities due to tumors that commonly arise in the head and neck region, and that invade blood vessels, nerves and vital organs, such as the eye or ear.

About Sun Pharmaceutical Industries Limited (CIN – L24230GJ1993PLC019050)

Sun Pharma is the world’s leading specialty generics company with a presence in specialty, generics and consumer healthcare products. It is the largest pharmaceutical company in India and is a leading generic company in the U.S. as well as global emerging markets. Sun Pharma’s high-growth global specialty portfolio spans innovative products in dermatology, ophthalmology, and onco-dermatology and accounts for over 18% of company sales. The company’s vertically integrated operations deliver high-quality medicines, trusted by physicians and consumers in over 100 countries. Its manufacturing facilities are spread across six continents. Sun Pharma is proud of its multicultural workforce drawn from over 50 nations. For further information, please visit www.sunpharma.com and follow us on LinkedIn & X (Formerly Twitter).

About Checkpoint Therapeutics, Inc.

Checkpoint is a commercial-stage immunotherapy and targeted oncology company focused on the acquisition, development and commercialization of novel treatments for patients with solid tumor cancers. Checkpoint has received approval from the U.S. FDA for UNLOXCYT™ (cosibelimab-ipdl) for the treatment of adults with metastatic cSCC or locally advanced cSCC who are not candidates for curative surgery or curative radiation. Additionally, Checkpoint is evaluating its lead investigational small-molecule, targeted anti-cancer agent, olafertinib (formerly CK-101), a third-generation epidermal growth factor receptor (EGFR) inhibitor, as a potential new treatment for patients with EGFR mutation-positive non-small cell lung cancer. Checkpoint is headquartered in Waltham, MA and was founded by Fortress. For more information, visit www.checkpointtx.com.

INDICATION and IMPORANT SAFETY INFORMATION

INDICATION

UNLOXCYT (cosibelimab-ipdl) is indicated for the treatment of adults with metastatic cutaneous squamous cell carcinoma (“cSCC”) or locally advanced cSCC who are not candidates for curative surgery or curative radiation.

IMPORTANT SAFETY INFORMATION

Severe and Fatal Immune-Mediated Adverse Reactions

  • Immune-mediated adverse reactions listed herein may not include all possible severe and fatal immune-mediated adverse reactions. Immune-mediated adverse reactions, which can be severe or fatal, can occur in any organ system or tissue, and occur at any time after starting a PD-1/PD-L1–blocking antibody, including UNLOXCYT. While immune-mediated adverse reactions usually manifest during treatment, they can also manifest after discontinuation of PD-1/PD-L1–blocking antibodies. Immune-mediated adverse reactions affecting more than one body system can occur simultaneously.
  • Monitor closely for signs and symptoms of immune-mediated adverse reactions. Evaluate liver enzymes, creatinine, and thyroid function tests at baseline and periodically during treatment. In cases of suspected immune-mediated adverse reactions, initiate appropriate workup to exclude alternative etiologies, including infection. Institute medical management promptly, including specialty consultation as appropriate.
  • Withhold or permanently discontinue UNLOXCYT depending on the severity of the adverse reaction (see Dosage and Administration in Prescribing Information). In general, if UNLOXCYT requires interruption or discontinuation, administer systemic corticosteroids (1 to 2 mg/kg/day prednisone or equivalent) until improvement to Grade 1 or less. Upon improvement to Grade 1 or less, initiate corticosteroid taper and continue to taper over at least 1 month. Consider administration of other systemic immunosuppressants in patients whose immune-mediated adverse reaction is not controlled with corticosteroids.

Immune-Mediated Pneumonitis

  • UNLOXCYT can cause immune-mediated pneumonitis. In patients treated with other PD-1/PD-L1–blocking antibodies, the incidence of pneumonitis is higher in patients who have received prior thoracic radiation. Immune-mediated pneumonitis occurred in 1% (3/223, Grade 2) of patients receiving UNLOXCYT.

Immune-Mediated Colitis

  • UNLOXCYT can cause immune-mediated colitis, which may present with diarrhea, abdominal pain, and lower gastrointestinal bleeding. Cytomegalovirus infection/reactivation has occurred in patients with corticosteroid-refractory immune-mediated colitis treated with PD-1/PD-L1–blocking antibodies. In cases of corticosteroid-refractory colitis, consider repeating infectious workup to exclude alternative etiologies. Immune-mediated colitis occurred in 0.4% (1/223, Grade 1) of patients receiving UNLOXCYT.

Immune-Mediated Hepatitis

  • UNLOXCYT can cause immune-mediated hepatitis.

Immune-Mediated Endocrinopathies

Adrenal Insufficiency

  • UNLOXCYT can cause primary or secondary adrenal insufficiency. For Grade 2 or higher adrenal insufficiency, initiate symptomatic treatment per institutional guidelines, including hormone replacement as clinically indicated. Withhold or permanently discontinue UNLOXCYT depending on severity. Adrenal insufficiency occurred in 0.9% (2/223) of patients receiving UNLOXCYT, including Grade 2 in 0.4% (1/223) of patients.

Hypophysitis

  • UNLOXCYT can cause immune-mediated hypophysitis. Hypophysitis can present with acute symptoms associated with mass effect such as headache, photophobia, or visual field cuts. Hypophysitis can cause hypopituitarism. Initiate hormone replacement as clinically indicated. Withhold or permanently discontinue UNLOXCYT depending on severity.

Thyroid Disorders

  • UNLOXCYT can cause immune-mediated thyroid disorders. Thyroiditis can present with or without endocrinopathy. Hypothyroidism can follow hyperthyroidism. Initiate hormone replacement or medical management of hyperthyroidism as clinically indicated. Withhold or permanently discontinue UNLOXCYT depending on severity. Hypothyroidism occurred in 10% (22/223) of patients receiving UNLOXCYT, including Grade 2 in 5% (10/223) of patients. Hyperthyroidism occurred in 5% (12/223) of patients receiving UNLOXCYT, including Grade 2 in 0.4% (1/223) of patients.

Type 1 Diabetes Mellitus, Which Can Present with Diabetic Ketoacidosis

  • UNLOXCYT can cause type 1 diabetes mellitus, which can present with diabetic ketoacidosis. Monitor patients for hyperglycemia or other signs and symptoms of diabetes. Initiate treatment with insulin as clinically indicated. Withhold or permanently discontinue UNLOXCYT depending on severity.

Immune-Mediated Nephritis with Renal Dysfunction

  • UNLOXCYT can cause immune-mediated nephritis.

Immune-Mediated Dermatologic Adverse Reactions

  • UNLOXCYT can cause immune-mediated rash or dermatitis. Bullous and exfoliative dermatitis, including Stevens-Johnson syndrome (SJS), toxic epidermal necrolysis (TEN), and drug rash with eosinophilia and systemic symptoms (DRESS), have occurred with PD-1/PD-L1–blocking antibodies. Topical emollients and/or topical corticosteroids may be adequate to treat mild to moderate non-bullous/exfoliative rashes. Withhold or permanently discontinue UNLOXCYT depending on severity. Immune-mediated dermatologic adverse reactions occurred in 7% (15/223) of patients receiving UNLOXCYT, including Grade 3 in 0.9% (2/223) of patients and Grade 2 in 4% (9/223) of patients.

Other Immune-Mediated Adverse Reactions

  • The following clinically significant immune-mediated adverse reactions occurred in <1% of the 223 patients who received UNLOXCYT or were reported with the use of other PD-1/PD-L1–blocking antibodies. Severe or fatal cases have been reported for some of these adverse reactions.
    • Cardiac/Vascular: Myocarditis, pericarditis, vasculitis.
    • Nervous System: Meningitis, encephalitis, myelitis and demyelination, myasthenic syndrome/myasthenia gravis (including exacerbation), Guillain-Barre syndrome, nerve paresis, autoimmune neuropathy.
    • Ocular: Uveitis, iritis, other ocular inflammatory toxicities. Some cases can be associated with retinal detachment. Various grades of visual impairment to include blindness can occur. If uveitis occurs in combination with other immune-mediated adverse reactions, consider a Vogt-Koyanagi-Harada–like syndrome, as this may require treatment with systemic steroids to reduce the risk of permanent vision loss.
    • Gastrointestinal: Pancreatitis, including increases in serum amylase and lipase levels, gastritis, duodenitis.
    • Musculoskeletal and Connective Tissue: Myositis/polymyositis, rhabdomyolysis and associated sequelae including renal failure, arthritis, polymyalgia rheumatica.
    • Endocrine: Hypoparathyroidism.
    • Other (Hematologic/Immune): Autoimmune hemolytic anemia, aplastic anemia, hemophagocytic lymphohistiocytosis, systemic inflammatory response syndrome, histiocytic necrotizing lymphadenitis (Kikuchi lymphadenitis), sarcoidosis, immune thrombocytopenia, solid organ transplant rejection, other transplant (including corneal graft) rejection.

Infusion-Related Reactions

  • UNLOXCYT can cause severe or life-threatening infusion-related reactions. Infusion-related infusion reactions were reported in 11% (24/223) of patients, including Grade 2 in 5.8% (13/223) of patients receiving UNLOXCYT.
  • Monitor patients for signs and symptoms of infusion-related reactions. Interrupt or slow the rate of infusion or permanently discontinue UNLOXCYT based on severity of reaction. Consider premedication with an antipyretic and/or an antihistamine for patients who have had previous systemic reactions to infusions of therapeutic proteins.

Complications of Allogeneic HSCT

  • Fatal and other serious complications can occur in patients who receive allogeneic hematopoietic stem cell transplantation (HSCT) before or after being treated with a PD-1/PD-L1–blocking antibody. Transplant-related complications include hyperacute graft-versus-host disease (GVHD), acute GVHD, chronic GVHD, hepatic veno-occlusive disease after reduced intensity conditioning, and steroid-requiring febrile syndrome (without an identified infectious cause). These complications may occur despite intervening therapy between PD-1/PD-L1 blockade and allogeneic HSCT. Follow patients closely for evidence of transplant-related complications and intervene promptly. Consider the benefit versus risks of treatment with a PD-1/PD-L1–blocking antibody prior to or after an allogeneic HSCT.

Embryo-Fetal Toxicity

  • Based on its mechanism of action, UNLOXCYT can cause fetal harm when administered to a pregnant woman. Animal studies have demonstrated that inhibition of the PD-1/PD-L1 pathway can lead to increased risk of immune-mediated rejection of the developing fetus, resulting in fetal death. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential to use effective contraception during treatment with UNLOXCYT and for 4 months after the last dose.

Common Adverse Reactions

The most common adverse reactions (≥10%) were fatigue, musculoskeletal pain, rash, diarrhea, hypothyroidism, constipation, nausea, headache, pruritus, edema, localized infection, and urinary tract infection.

Please see full Prescribing Information.

SOURCE: Sun Pharmaceutical Industries