5. PATENT AND TECHNOLOGY LICENSE AGREEMENTS

License Agreement with Eisai

In September 2021, Citius Pharma entered into an asset purchase agreement with Dr. Reddy’s Laboratories SA, a subsidiary of Dr. Reddy’s Laboratories, Ltd. (collectively, “Dr. Reddy’s”) and a license agreement with Eisai Co., Ltd. (“Eisai”) to acquire an exclusive license of E7777 (denileukin diftitox), an oncology immunotherapy for the treatment of CTCL, a rare form of non-Hodgkin lymphoma. Citius Pharma renamed E7777 as I/ONTAK and also obtained the trade name of LYMPHIR for the product. Citius Pharma assigned these agreements to us effective April 1, 2022.. The Company received a BLA approval from the FDA for LYMPHIR in August 2024.

Under the terms of these agreements, Citius Pharma acquired Dr. Reddy’s exclusive license for E7777 from Eisai and other related assets owned by Dr. Reddy’s (which are now owned by Citius Oncology). The exclusive license rights include rights to develop and commercialize E7777 in all markets except for Japan and certain parts of Asia. Additionally, we retained an option on the right to develop and market the product in India. Eisai retains exclusive development and marketing rights for the agent in Japan, China, Korea, Taiwan, Hong Kong, Macau, Indonesia, Thailand, Malaysia, Brunei, Singapore, India (subject to the India option prior to FDA approval), Pakistan, Sri Lanka, Philippines, Vietnam, Myanmar, Cambodia, Laos, Afghanistan, Bangladesh, Bhutan, Nepal, Mongolia, and Papua New Guinea. Citius Pharma paid Dr. Reddy’s a $40 million upfront payment, which represents the acquisition date fair value of the in-process research and development acquired from Dr. Reddy’s. Dr. Reddy’s is entitled to up to $40 million in development milestone payments related to CTCL approvals in the U.S. and other markets, up to $70 million in development milestones for additional indications, as well as commercial milestone payments and low double-digit tiered royalties on net product sales (within a range of 10% to 15%), and up to $300 million for commercial sales milestones. Citius Oncology also must pay on a fiscal quarter basis tiered royalties equal to low double-digit percentages of net product sales (within a range of 10% to 15%). The royalties will end on the earlier of (i) the 15-year anniversary of the first commercial sale of the latest indication that received regulatory approval in the applicable country and (ii) the date on which a biosimilar product results in the reduction of net sales in the applicable product by 50% in two consecutive quarters, as compared to the four quarters prior to the first commercial sale of the biosimilar product. Citius Oncology will also pay to Dr. Reddy’s an amount equal to a low-thirties percentage of any sublicense upfront consideration or milestone payments (or the like) received by us and the greater of (i) a low-thirties percentage of any sublicensee sales-based royalties or (ii) a mid-single digit percentage of such licensee’s net sales. Citius Pharma is a guarantor of Citius Oncology’s payment obligations under these agreements.

At the time of the FDA approval for LYMPHIR, a $27.5 million milestone payment became payable to Dr. Reddy’s under the terms of the asset purchase agreement for which a balance of $22.5 million remains due as of March 31, 2025. Pending further discussions with Dr. Reddy’s, Dr. Reddy’s agreed to a partial deferral without penalty of this milestone payment.

Under the license agreement, Eisai was to receive a $5.9 million milestone payment upon FDA approval, which is included in license payable at March 31, 2025, and additional commercial milestone payments related to the achievement of net product sales thresholds and an aggregate of up to $22 million related to the achievement of net product sales thresholds. Citius Oncology was also required to reimburse Eisai for up to $2.65 million of its costs to complete the Phase 3 pivotal clinical trial for LYMPHIR for the CTCL indication and reimburse Eisai for all reasonable costs associated with the preparation of a Biologics License Application (“BLA”) for LYMPHIR. Eisai was responsible for completing the CTCL clinical trial, and chemistry, manufacturing, and controls (“CMC”) activities through the filing of the BLA for LYMPHIR with the FDA. The BLA was approved by the FDA on August 8, 2024. We are responsible for development costs associated with potential additional indications.

On March 28, 2025, Citius Oncology and Eisai entered into a letter agreement that amended the license agreement to provide for a payment schedule to Eisai for the milestone payment and certain unpaid invoices. Citius Oncology has agreed to pay Eisai on or before July 15, 2025, an aggregate amount of $2,535,318 and thereafter on the 15^th of each of the next four months to pay Eisai $2,350,000 and make a final payment of $2,197,892 to Eisai on or before December 15, 2025, in each case with interest on each obligation from its original due date through the date of actual payment under the letter agreement at the rate of 2% per annum. The parties released each other from any and all claims, losses, damages, costs and expenses that arise from or related to the failure of Citius Oncology to pay the milestone payment or the other incurred costs under the license agreement except for any claims arising out of a breach of the letter agreement. All other terms of the license agreement remain in full force and effect.

The term of the license agreement will continue until (i) March 30, 2026, if there has not been a commercial sale of a licensed product in the territory, or (ii) if there has been a first commercial sale of a licensed product in the territory by March 30, 2026, the 10-year anniversary of the first commercial sale on a country-by-country basis. The term of the license may be extended for additional 10-year periods for all countries in the territory by notifying Eisai and paying an extension fee equal to $10 million. Either party may terminate the license agreement upon written notice if the other party is in material breach of the agreement, subject to cure within the designated time periods. Either party also may terminate the license agreement immediately upon written notice if the other party files for bankruptcy or takes related actions or is unable to pay its debts as they become due. Additionally, either party will have the right to terminate the agreement if the other party directly or indirectly challenges the patentability, enforceability or validity of any licensed patent.

Under the purchase agreement with Dr. Reddy’s, we are required to (i) use commercially reasonable efforts to make commercially available products in the CTCL indication, peripheral T-cell lymphoma indication and immuno-oncology indication, (ii) initiate two investigator initiated immuno-oncology trials (both of which have been initiated), (iii) use commercially reasonable efforts to achieve each of the approval milestones, and (iv) complete each specified immuno-oncology investigator trial on or before the four-year anniversary of the effective date of the definitive agreement. Additionally, we are required to commercially launch a product in a territory within six months of receiving regulatory approval for such product in each such jurisdiction.

As part of the definitive agreement with Dr. Reddy’s, Citius Pharmaceuticals acquired method of use patents in which LYMPHIR is administered in combination with the programmed cell death protein 1 (“PD-1”) pathway inhibitor drug class. PD-1 plays a vital role in inhibiting immune responses and promoting self-tolerance through modulating the activity of T-cells, activating apoptosis of antigen-specific T cells and inhibiting apoptosis of regulatory T cells.

The following patents were acquired and subsequently transferred to us:

Upon FDA approval of LYMPHIR in August 2024, the Company was subject to approval milestone payments totaling $33.4 million. The Company paid $5.0 million prior to year end and the remaining balance is reflected as a License Payable on the balance sheet. The $33.4 million was recorded as in-process research and development asset and will be subject to amortization over the regulatory exclusivity period commencing upon revenue generation.

4. PATENT AND TECHNOLOGY LICENSE AGREEMENTS

In September 2021, Citius Pharmaceuticals entered into and transferred to the Company an asset purchase agreement with Dr. Reddy’s Laboratories SA, a subsidiary of Dr. Reddy’s Laboratories, Ltd. (collectively, “Dr. Reddy’s”) and a license agreement with Eisai Co., Ltd. (“Eisai”) to acquire its exclusive license for E7777 (denileukin diftitox), a late-stage oncology immunotherapy for the treatment of CTCL, a rare form of non-Hodgkin lymphoma. Citius Pharmaceuticals assigned these agreements to us effective April 1, 2022. We have obtained the trade name of LYMPHIR for E7777.

Under the terms of these agreements, Citius Pharmaceuticals acquired Dr. Reddy’s exclusive license for LYMPHIR from Eisai and other related assets owned by Dr. Reddy’s. The exclusive license includes rights to develop and commercialize LYMPHIR in all markets except for Japan and certain parts of Asia. Additionally, we retained an option on the right to develop and market the product in India. Eisai retains exclusive development and marketing rights for the agent in Japan and Asia. Citius Pharmaceuticals paid $40 million upfront payment which represents the acquisition date fair value of the in-process research and development acquired from Dr. Reddy’s. Dr. Reddy’s is entitled to up to $40 million in development milestone payments related to CTCL approvals in the U.S. and other markets, up to $70 million in development milestones for additional indications, as well as commercial milestone payments and low double-digit tiered royalties on net product sales, and up to $300 million for commercial sales milestones. We also must pay on a fiscal quarter basis tiered royalties equal to low double-digit percentages of net product sales. The royalties will end on the earlier of (i) the 15-year anniversary of the first commercial sale of the latest indication that received regulatory approval in the applicable country and (ii) the date on which a biosimilar product results in the reduction of net sales in the applicable product by 50% in two consecutive quarters, as compared to the four quarters prior to the first commercial sale of the biosimilar product. We are also required pay to Dr. Reddy’s an amount equal to a low-thirties percentage of any sublicense upfront consideration or milestone payments (or the like) received by us and the greater of (i) a low-thirties percentage of any sublicensee sales-based royalties or (ii) a mid-single digit percentage of such licensee’s net sales.

Under the license agreement, Eisai is to receive a $5.9 million development milestone payment upon initial approval and additional commercial milestone payments related to the achievement of net product sales thresholds (which increases to $7 million in the event we have exercised our option to add India to the licensed territory prior to FDA approval) and an aggregate of up to $22 million related to the achievement of net product sales thresholds. Citius Pharma was also required to reimburse Eisai for up to $2.65 million of its costs to complete the Phase 3 pivotal clinical trial for LYMPHIR for the CTCL indication and reimburse Eisai for all reasonable costs associated with the preparation of a Biologics License Application, (the “BLA”) for LYMPHIR. Eisai was responsible for completing the CTCL clinical trial, and chemistry, manufacturing and controls (CMC) activities through the filing of a BLA for LYMPHIR with the FDA. The BLA was filed with the FDA on September 27, 2022. We will also be responsible for development costs associated with potential additional indications.

The term of the license agreement will continue until (i) if there has not been a commercial sale of a licensed product in the territory, the 10-year anniversary of the original license effective date, March 30, 2016, or (ii) if there has been a first commercial sale of a licensed product in the territory within the 10-year anniversary of the original license effective date, the 10-year anniversary of the first commercial sale on a country-by-country basis. The term of the license may be extended for additional 10-year periods for all countries in the territory by notifying Eisai and paying an extension fee equal to $10 million. Either party may terminate the license agreement upon written notice if the other party is in material breach of the agreement, subject to cure within the designated time periods. Either party also may terminate the license agreement immediately upon written notice if the other party files for bankruptcy or takes related actions or is unable to pay its debts as they become due. Additionally, either party will have the right to terminate the agreement if the other party directly or indirectly challenges the patentability, enforceability or validity of any licensed patent.

Also under the purchase agreement with Dr. Reddy’s, we are required to (i) use commercially reasonable efforts to make commercially available products in the CTCL indication, peripheral T-cell lymphoma indication and immuno-oncology indication, (ii) initiate two investigator initiated immuno-oncology trials (both of which have been initiated), (iii) use commercially reasonable efforts to achieve each of the approval milestones, and (iv) to complete each specified immuno-oncology investigator trial on or before the four-year anniversary of the effective date of the definitive agreement. Additionally, we are required to commercially launch a product in a territory within six months of receiving regulatory approval for such product in each such jurisdiction. 

On July 29, 2023, we received a Complete Response Letter, (“CRL”) from the FDA regarding the BLA seeking approval for LYMPHIR. The FDA has required that we incorporate enhanced product testing, and additional controls agreed to with the FDA during the market application review. The FDA raised no concerns relating to the safety and efficacy clinical data package.

On September 8, 2023, we announced that the FDA agreed with our plans to address the requirements outlined in the CRL. The guidance from the FDA provides a path for completing the necessary activities to support the resubmission of the BLA. No additional clinical efficacy or safety trials have been requested by FDA for the resubmission.

The Company remediated the issues raised in the CRL by the FDA and received a BLA approval in August 2024.

As part of the definitive agreement with Dr. Reddy’s, Citius Pharmaceuticals acquired method of use patents in which LYMPHIR is administered in combination with the programmed cell death protein 1 (“PD-1”) pathway inhibitor drug class. PD-1 plays a vital role in inhibiting immune responses and promoting self-tolerance through modulating the activity of T-cells, activating apoptosis of antigen-specific T cells and inhibiting apoptosis of regulatory T cells.

The following patents were acquired and subsequently transferred to Citius Oncology, Inc.:

US Provisional Application No. 63/070,645, which was filed on August 26, 2020, and subsequently published as US 2022/0062390 A1 on March 3, 2022, entitled Methods of Treating Cancer.

International Patent Application Number: PCT/IB2021/0576733, which was filed with the World Intellectual Property Organization on August 23, 2021, and subsequently published as WO 2022/043863 A1 on March 3, 2022, entitled, Combination for Use in Methods of Treating Cancer.

Upon approval of the product in August 2024, the Company was subject to milestone payments totaling $33.4 million. The Company paid $5.0 million prior to year end and the remaining balance is reflected as a License Payable on the balance sheet. The $33.4 million was recorded as in-process research and development asset and will be subject to amortization as further discussed in Note 3.