Biggest changeThe following table presents the components of restructuring, impairment and other costs of terminated program, as further described and disclosed in Note 11 to our Consolidated Financial Statements (in thousands): Year Ended December 31, 2022 Clinical trial expense, other third-party and employee costs for the wind down of the bempegaldesleukin program $ 31,693 Severance and benefit expense 30,904 Impairment of right-of-use assets and property, plant and equipment 65,761 Loss (gain) on sale or disposal of other property, plant and equipment, net (3,326) Contract termination and other restructuring costs 10,898 Restructuring, impairment and other costs of terminated program $ 135,930 For nine-month period ended December 31, 2022, we recorded a reduction of expense of $20.8 million for the net reimbursement from BMS, primarily for clinical trial expense, other third-party and employee costs for the wind down of the bempegaldesleukin program.
Biggest changeIn connection with these events, we reported the following costs in Restructuring, impairment and ther costs of terminated program as further described and disclosed in Note 8 to our Consolidated Financial Statements (in thousands): Year Ended December 31, 2023 2022 2022 Restructuring Plan 2023 Restructuring Plan Total 2022 Restructuring Plan Clinical trial expense, other third-party and employee costs for the wind down of the bempegaldesleukin program $ 5,492 $ — $ 5,492 $ 31,693 Severance and benefit expense — 7,885 7,885 30,904 Impairment of right-of-use assets and property, plant and equipment 14,728 20,600 35,328 65,761 Loss (gain) on sale or disposal of other property, plant and equipment, net — 1,300 1,300 (3,326 ) Contract termination and other restructuring costs 1,919 34 1,953 10,898 Restructuring, impairment and costs of terminated program $ 22,139 $ 29,819 $ 51,958 $ 135,930 • Clinical trial expense, other third-party and employee costs for the wind down of the bempegaldesleukin program: The expense decreased for the year ended December 31, 2023 as compared to the year ended December 31, 2022, as we continued to wind down the bempegaldesleukin program.
However, we have sold the majority of our rights to receive royalties under these arrangements, including: • 2012 Purchase and Sale Agreement: In 2012, we sold all of our rights to receive royalties from CIMZIA ® (for the treatment of Crohn’s disease and other autoimmune indications) and MIRCERA ® (for the treatment of anemia associated with chronic kidney disease) under our collaborations with UCB Pharma and F.
However, we have sold the majority of our rights to receive royalties under these arrangements, including: • 2012 Purchase and Sale Agreement: In 2012, we sold all of our rights to receive royalties from CIMZIA ® (for the treatment of Crohn’s disease and other autoimmune indications) and MIRCERA ® (for the treatment of anemia associated with chronic kidney disease) under our collaborations with UCB Pharma (UCB) and F.
Collaborative Arrangements When we enter into collaboration agreements with pharmaceutical and biotechnology partners, we assess whether the arrangements fall within the scope of Accounting Standards Codification (ASC) 808, Collaborative Arrangements (ASC 808) based on whether the arrangements involve joint operating activities and whether both parties have active participation in the 52 arrangement and are exposed to significant risks and rewards.
Collaborative Arrangements When we enter into collaboration agreements with pharmaceutical and biotechnology partners, we assess whether the arrangements fall within the scope of Accounting Standards Codification (ASC) 808, Collaborative Arrangements (ASC 808) based on whether the arrangements involve joint operating activities and whether both parties have active participation in the arrangement and are exposed to significant risks and rewards.
However, due to the collaborative nature of our joint development and commercialization of bempegaldesleukin, we recognize the reimbursements we receive from BMS for their share of the costs that we incur for the development, manufacturing and commercialization of bempegaldesleukin as a reduction of research and development expense; general and administrative expense; or restructuring, impairment and other costs of terminated program, as applicable.
However, due to the collaborative nature of our joint development and commercialization of bempegaldesleukin, we recognize the reimbursements we receive from BMS for their share of the costs that we incur for the development, manufacturing and commercialization of bempegaldesleukin as a reduction of research and development expense; general and administrative expense; or restructuring, impairment and costs of terminated program, as applicable.
This negotiation was implemented through the Letter Agreement between RPI and us, which permitted us to enter into the Settlement Agreement with UCB in October 53 2021.
This negotiation was implemented through the Letter Agreement between RPI and us, which permitted us to enter into the Settlement Agreement with UCB in October 2021.
Debt Modification As discussed in Note 7 to our Consolidated Financial Statements, to resolve UCB’s challenges to our patents and their resulting obligation to pay us the royalties on net sales of CIMZIA ® which we had sold to RPI, RPI and UCB negotiated a reduction in the royalty term and decreased royalty rates over the remaining term.
Debt Modification As discussed in Note 5 to our Consolidated Financial Statements, to resolve UCB’s challenges to our patents and their resulting obligation to pay us the royalties on net sales of CIMZIA ® which we had sold to RPI, RPI and UCB negotiated a reduction in the royalty term and decreased royalty rates over the remaining term.
We apply our deep understanding of immunology and unparalleled expertise in polymer chemistry to create innovative drug candidates and use our drug development expertise to advance these molecules through preclinical and clinical development . Our pipeline of clinical-stage immunomodulatory agents targets the treatment of autoimmune diseases (e.g. rezpegaldesleukin) and cancer (e.g. NKTR-255).
We apply our deep understanding of immunology and unparalleled expertise in polymer chemistry to create innovative drug candidates and use our drug development expertise to advance these molecules through preclinical and clinical development. Our pipeline of clinical-stage and preclinical-stage immunomodulatory agents targets the treatment of autoimmune diseases (e.g. rezpegaldesleukin and NKTR-0165, respectively) and cancer (e.g. NKTR-255).
The level of license, collaboration and other revenue depends in part upon the estimated recognition period of the upfront payments allocated to continuing performance obligations, the achievement of milestones and other contingent events, the continuation of existing collaborations, the amount of research and development work, and entering into new collaboration agreements, if any.
The amount of revenue depends in part upon the estimated recognition period of the upfront payments allocated to continuing performance obligations, the achievement of milestones and other contingent events, the continuation of existing collaborations, the amount of research and development work, and entering into new collaboration agreements, if any.
For a discussion of these and some of the other key risks and uncertainties affecting our business, see Item 1A “Risk Factors.” With respect to financing our near-term business needs, as set forth below in “Key Developments and Trends in Liquidity and Capital Resources,” we estimate we have working capital to fund our current business plans through at least the next twelve months.
For a discussion of these and some of the other key risks and uncertainties affecting our business, see Item 1A “Risk Factors.” 42 Table of Contents With respect to financing our near-term business needs, as set forth below in “Key Developments and Trends in Liquidity and Capital Resources,” we estimate we have working capital to fund our current business plans through at least the next twelve months.
For our vacant office space on Third St., however, there is significant uncertainty as to whether or when we will be able to enter into a sublease as well as the economic terms of such subleases, if any.
Accordingly, for our vacant office space on Third St., there is significant uncertainty as to whether or when we will be able to enter into a sublease as well as the economic terms of such subleases, if any.
In addition to our drug candidates that we plan to evaluate in clinical development during 2023 and beyond, we believe it is vitally important to continue our substantial investment in a pipeline of new drug candidates to continue to build the value of our drug candidate pipeline and our business.
In addition to our drug candidates that we plan to evaluate in clinical development during 2024 and beyond, we believe it is vitally important to continue our substantial investment in a pipeline of new drug candidates to continue to build the value of our drug candidate pipeline and our business.
Since no active, traded markets exist for arrangements of this nature, we concluded that the 2020 Purchase and Sale Arrangement was economically similar enough to the modified 2012 Purchase and Sale Agreement to use as a basis for the discount rate because the products under both arrangements are well established drugs and the duration of the arrangements are similar.
Since no 51 Table of Contents active, traded markets exist for arrangements of this nature, we concluded that the 2020 Purchase and Sale Arrangement was economically similar enough to the modified 2012 Purchase and Sale Agreement to use as a basis for the discount rate because the products under both arrangements are well established drugs and the duration of the arrangements are similar.
We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form our basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. We evaluate our estimates on an ongoing basis.
We base our estimates on historical experience and on various other assumptions that we believe to be reasonable under the circumstances, the results of which form our basis for making judgments about the carrying value of assets and 49 Table of Contents liabilities that are not readily apparent from other sources. We evaluate our estimates on an ongoing basis.
Accordingly, if our estimates for the time to enter the sublease and estimated free rent periods were longer (shorter), the impairment charge would be higher (lower), and if our estimates for the rental rates were lower (higher), the impairment charge would be higher (lower).
Accordingly, if our estimates for the time to enter the sublease and estimated free rent periods were longer (shorter), the impairment charge would be greater (smaller), and if our estimates for the rental rates were lower (higher), the impairment charge would be greater (smaller).
Given the current office lease market rental conditions in San Francisco and the larger Bay Area, our estimates are subject to significant uncertainty.
Given the current office and life sciences lease market rental conditions in San Francisco and the larger Bay Area, our estimates are subject to significant uncertainty.
We have concluded that our collaboration agreements with BMS and Lilly fall within the scope of ASC 808. We concluded that the upfront and milestone payments under these arrangements fall within the scope of ASC 606 and therefore recognize these payments as revenue in license, collaboration and other revenue.
We have concluded that our collaboration agreements with BMS and Lilly fall within the scope of ASC 808. We concluded that the upfront and milestone payments under these arrangements fall within the scope of ASC 606 and therefore 50 Table of Contents recognize these payments as revenue in license, collaboration and other revenue.
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations The following discussion contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those discussed here.
Item 7. Management’s Discussion and Analysi s of Financial Condition and Results of Operations The following discussion contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those discussed here.
For the remaining three quarters of 2022, we reported direct employee costs supporting the wind down of the bempegaldesleukin program in restructuring, impairment and other costs of terminated program.
For the remaining three quarters of 2022 and all of 2023, we reported direct employee costs supporting the wind down of the bempegaldesleukin program in restructuring, impairment and costs of terminated program.
Cash flows from invest i ng activities During the years ended December 31, 2022 and 2021, the maturities and sales of our investments, net of purchases, totaled $358.3 million and $217.8 million, respectively, which we used to fund our operations.
Cash flows from invest i ng activities During the years ended December 31, 2023 and 2022, the maturities and sales of our investments, net of purchases, totaled $139.2 million and $358.3 million, respectively, which we used to fund our operations.
As part of our impairment evaluation of each vacated space, we separately compared the estimated undiscounted income to the net book value of the related long-term assets, which include right-of-use assets and certain property, plant and equipment, primarily leasehold improvements (collectively, sublease assets).
As part of our evaluation of each sublease space, we separately compare the estimated undiscounted sublease income, as described above, for each sublease to the net book value of the related long-term assets, which include right-of-use assets and certain property, plant and equipment, primarily for leasehold improvements (collectively, sublease assets).
Determination of these key assumptions is complex and highly judgmental. For certain impairment charges, we used the terms of active sublease negotiations or agreements to estimate sublease income. However, for our facility at 360 Third.
Determination of these key assumptions is complex and highly judgmental. For certain impairment charges, we used the terms of active sublease negotiations or agreements to estimate sublease income.
We generally do not believe that we would update the transaction price before events that are outside of our control occur, such as the release of clinical trial results, regulatory acceptance of a BLA or similar filing or regulatory approval.
Due to the significant uncertainties involved with clinical development and regulatory approval, we generally do not believe that we would update the transaction price before events that are outside of our control occur, such as the release of clinical trial results, regulatory acceptance of a BLA or similar filing or regulatory approval.
Our discovery research organization is identifying new drug candidates across a wide range of molecule classes, including small molecules and large proteins, peptides and antibodies. We also plan from time to time to evaluate opportunities to in-license potential drug candidates from third parties to add to our drug discovery and 46 development pipeline.
We continue our interest in identifying new drug candidates across a wide range of molecule classes, including small molecules and large proteins, peptides and antibodies, across multiple therapeutic areas. We also plan from time to time to evaluate opportunities to in-license potential drug candidates from third parties to add to our drug discovery and development pipeline.
At December 31, 2022, we had approximately $505.0 million in cash and investments in marketable securities. Results of Operations Years Ended December 31, 2022 and 2021 The results of operations for the years ended December 31, 2022 and 2021 is presented below.
At December 31, 2023, we had approximately $329.4 million in cash and investments in marketable securities. Results of Operations The results of operations for the years ended December 31, 2023 and 2022 is presented below.
Cash flows from operating activities Cash flows used in operating activities for the years ended December 31, 2022 and 2021 totaled $304.0 million and $412.7 million, respectively.
Cash flows from operating activities Cash flows used in operating activities for the years ended December 31, 2023 and 2022 totaled $192.6 million and $304.0 million, respectively.
We are continuing our oncology clinical collaboration with Merck KGaA and Pfizer Inc. to evaluate the maintenance regimen of NKTR-255 in combination with 42 avelumab, a PD-L1 inhibitor, in patients with locally advanced or metastatic urothelial carcinoma in the Phase II JAVELIN Bladder Medley study.
We are continuing our oncology clinical collaboration with Merck KGaA to evaluate the maintenance regimen of NKTR-255 in combination with avelumab, a PD-L1 inhibitor, in patients with locally advanced or metastatic urothelial carcinoma in the Phase II JAVELIN Bladder Medley study. We expect to receive topline data from the study in the second half of 2024.
The following table presents expenses incurred for clinical and regulatory services, clinical supplies, and preclinical study support provided by third parties as well as contract manufacturing costs for each of our drug candidates.
The following table presents expenses incurred for direct third-party costs, including clinical and regulatory services, contract manufacturing, clinical supplies, and preclinical study support for each of our drug candidates.
As discussed in Note 11, in connection with our 2022 Restructuring Plan, we have consolidated our San Francisco operations in our Mission Bay Facility, and we have vacated our Third St. Facility and certain laboratory and office spaces at our Mission Bay Facility.
As discussed in Note 8, in connection with our 2022 and 2023 Restructuring Plan, we have consolidated our San Francisco operations in our Mission Bay Facility, and we have vacated our Third St. Facility and certain laboratory and office spaces at our Mission Bay Facility. We have decided to sublease all of our leased spaces in the Third St.
In the future, we have the opportunity to receive up to $250.0 million in milestone payments under our collaboration agreement with Lilly. 50 Our current business is subject to significant uncertainties and risks as a result of, among other factors, clinical and regulatory outcomes for rezpegaldesleukin and NKTR-255; the sales levels for those products (for both wholly owned products such as NKTR-255 and for licensed products such as rezpegaldesleukin for which we are entitled to royalties), if and when they are approved; whether, when and on what terms we are able to enter into new collaboration transactions; expenses being higher than anticipated; unplanned expenses and the need to satisfy contingent liabilities, including litigation matters and indemnification obligations; and cash receipts, including sublease income, being lower than anticipated.
Our current business is subject to significant uncertainties and risks as a result of, among other factors, clinical and regulatory outcomes for rezpegaldesleukin and NKTR-255; the sales levels for those products, if and when they are approved; whether, when and on what terms we are able to enter into new collaboration transactions; expenses being higher 48 Table of Contents than anticipated, unplanned expenses and the need to satisfy contingent liabilities, including litigation matters and indemnification obligations; and cash receipts, including sublease income, being lower than anticipated.
In addition to our collaboration with Lilly, we have received upfront and milestone payments under a number of other previous collaboration agreements, several of which have resulted in approved drugs, for which we may continue to manufacture the polymer reagents used in the production of the drug products and may be entitled to royalties for net sales of these approved drugs.
Several of our historical collaboration agreements have resulted in approved drugs, for which we may continue to manufacture the polymer reagents used in the production of the drug products and may be entitled to royalties for net sales of these approved drugs.
St., which represents the substantial majority of our impairment charges for the year ended December 31, 2022, we developed our estimates of the time to enter into a sublease and sublease payments, including estimated free rent periods, based on current real estate trends and market conditions.
However, for the most significant impairment charges we recorded, we developed our estimates of the time to enter into a sublease and sublease payments, including estimated free rent periods, based on current real estate trends and market conditions.
Under the BMS Collaboration Agreement, BMS generally bears 67.5% of development costs for bempegaldesleukin in combination with Opdivo ® and 35% of costs for manufacturing bempegaldesleukin. 45 As discussed in Note 1 to our Consolidated Financial Statements, in April 2022, BMS and we decided to discontinue development of bempegaldesleukin in combination with Opdivo ® and will wind down the various clinical trials under the BMS Collaboration Agreement, and we also decided to discontinue all other development of bempegaldesleukin.
As discussed in Note 1 to our Consolidated Financial Statements, in April 2022, BMS and we decided to discontinue development of bempegaldesleukin in combination with Opdivo ® , and we have also decided to discontinue all other development of bempegaldesleukin. BMS and we have each substantially wound down our respective clinical trials under the BMS Collaboration Agreement.
We cannot forecast with any degree of certainty which of our drug candidates will be subject to future collaborations or how such arrangements would affect our development plans or capital requirements.
We cannot forecast with any degree of certainty which of our drug candidates will be subject to future collaborations or how such arrangements would affect our development plans or capital requirements. 46 Table of Contents General and Administrative Expense General and administrative expense includes the cost of administrative staffing, commercial, finance and legal activities.
We continue to advance our most promising research drug candidates into preclinical development with the objective of advancing these early-stage research programs to human clinical studies over the next several years. Our lead research program is focused on developing a tumor necrosis factor (TNF) receptor 2 (TNFR2) agonist antibody.
We continue to advance our most promising research drug candidates into preclinical development with the objective of advancing these early-stage research programs to human clinical studies over the next several years.
However, if the need arises to liquidate such securities before maturity, we may experience losses on liquidation. To date we have not experienced any liquidity issues with respect to these securities.
These investments are generally held to maturity, which, in accordance with our investment policy, is less than two years. However, if the need arises to liquidate such securities before maturity, we may experience losses on liquidation. To date we have not experienced any liquidity issues with respect to these securities.
Business. (2) In April 2022, BMS and we terminated the development of the bempegaldesleukin program. Accordingly, development expenses for bempegaldesleukin are reported in research and development expense for the first quarter of 2022 and for the full year of 2021.
Definitions are provided in Part I, Item 1. Business. (2) In April 2022, BMS and we terminated the development of the bempegaldesleukin program. We report development expenses for bempegaldesleukin in research and development expense for the first quarter of 2022.
Due to our expected net loss in 2023, we expect income tax expense to be lower for 2023 as compared to 2022. Liquidity and Capital Resources We have financed our operations primarily through revenue from upfront and milestone payments under our strategic collaboration agreements, royalties and product sales, as well as public and private placements of debt and equity securities.
We do not expect to recognize significant reclassification adjustments in 2024. Liquidity and Capital Resources We have financed our operations primarily through revenue from upfront and milestone payments under our strategic collaboration agreements, royalties and product sales, as well as public and private placements of debt and equity securities.
We may pursue various financing alternatives to fund the expansion of our business as appropriate. As a result of our 2022 Restructuring Plan, we have executed subleases for a portion of our excess laboratory spaces and are seeking to sublease additional laboratory and office space.
We may pursue various financing alternatives to fund the expansion of our business as appropriate. As a result of our 2022 and 2023 Restructuring Plans, we are seeking to sublease all of our laboratory and office space on Mission Bay Blvd.
As of December 31, 2022, we had approximately $505.0 million in cash and investments in marketable securities. We estimate that we have working capital to fund our current business plans for at least the next twelve months from the date of filing.
We estimate that we have working capital to fund our current business plans for at least the next twelve months from the date of filing.
For the remaining three quarters of 2022, we reported clinical trial expense, other third-party costs and employee costs for the wind down of the bempegaldesleukin program, net of the reimbursement from BMS, within restructuring, impairment and other costs of terminated program in our Consolidated Statement of Operations. We utilize our employee and infrastructure resources across multiple development and research programs.
Beginning with the second quarter of 2022, we report clinical trial expense, other third-party costs and employee costs for the bempegaldesleukin program, net of the reimbursement from BMS, within restructuring, impairment and costs of terminated program in our Consolidated Statement of Operations.
Clinical development successes and failures can have a disproportionately positive or negative impact on our scientific and medical prospects, financial condition and prospects, results of operations and market opportunities. We continue to actively monitor the ongoing COVID-19 pandemic and applicable government recommendations in light of new developments.
Clinical development successes and failures can have a disproportionately positive or negative impact on our scientific and medical prospects, financial condition and prospects, results of operations and market opportunities.
In addition, we initiated a Nektar-sponsored Phase 2/3 study to evaluate NKTR-255 following Yescarta® or Breyanzi® CD19 CAR-T cell therapy in patients with large B-cell lymphoma. Two ongoing investigator sponsored trials are evaluating NKTR-255 following treatment with a CAR-T cell therapy.
We initiated a Nektar-sponsored Phase 2/3 study to evaluate NKTR-255 following Yescarta ® or Breyanzi ® CD19 CAR-T cell therapy in patients with large B-cell lymphoma, and the Fred Hutchinson Cancer Center is evaluating NKTR-255 following Breyanzi ® CD19 CAR-T cell therapy in patients with relapsed/refractory large B-cell lymphoma as an investigator 41 Table of Contents sponsored study.
We do not expect significant license, collaboration and other revenue for 2023. The timing and future success of our drug development programs and those of our collaboration partners are subject to a number of risks and uncertainties. See Item 1A.
The timing and future success of our drug development programs and those of our collaboration partners are subject to a number of risks and uncertainties. See Item 1A. Risk Factors for discussion of the risks associated with the complex nature of our collaboration agreements.
(4) The amounts include reductions of $9.8 million and $37.2 million of employee cost reimbursements from BMS under our collaboration for the quarter ended March 31, 2022 and the year ended December 31, 2021, respectively.
(3) The amounts include our 25% share of costs incurred by Lilly for the Phase 1b and Phase 2 development of rezpegaldesleukin. Lilly was responsible for 75% of costs. (4) The amounts include reductions of $9.8 million employee cost reimbursements from BMS under our collaboration for the quarter ended March 31, 2022.
For the impairment of right-of-use assets, we will continue to update our estimates based on changes in market conditions, whether or not we are able to enter into subleases and, if we do enter into subleases, the economic terms of those subleases, and we may record impairment charges in future periods as these estimates change.
We will continue to update our estimates based on changes in market conditions, whether or not we are able to enter into subleases and, if we do enter into subleases, the economic terms of such subleases, and we may record non-cash impairment charges in future periods as these estimates change. • Loss (gain) on sale or disposal of property, plant and equipment: We recognized a net gain of $3.3 million for the sale of property, plant and equipment for the full year 2022, primarily resulting from the sale of our research and development facility in India.
We have a manufacturing arrangement with a partner that includes a fixed price which is less than the fully burdened manufacturing cost for the polymer reagent, and we expect this arrangement to continue in future years. We also receive royalty revenue from this collaboration.
We have a manufacturing arrangement with UCB that includes a fixed price which is less than the fully burdened manufacturing cost for the reagent, and we expect this situation to continue in future years. As a result of this arrangement, gross margin was negative for the years ended December 31, 2023 and 2022.
Otherwise, we recorded an impairment charge by reducing the net book value of the assets to their estimated fair value, which we determined by discounting the estimated sublease cash flows using the estimated borrowing rate of a market participant subtenant, which we estimated to be 6.4% and 7.9% as of May 31, 2022 and December 31, 2022, respectively.
If such sublease income exceeds the net book value of the sublease assets, we do not record an impairment charge. Otherwise, we record an impairment charge by reducing the net book value of the sublease assets to their estimated fair value, which we determined by discounting the estimated sublease income using the estimated borrowing rate of a market participant subtenant.
Interest Income and Other Income (Expense), net (in thousands, except percentages) Year Ended December 31, Increase/ (Decrease) 2022 vs. 2021 Percentage Increase/ (Decrease) 2022 vs. 2021 2022 2021 Interest income and other income (expense), net $ 6,667 $ 2,569 $ 4,098 >100% Interest income and other income (expense), net increased for the year ended December 31, 2022 compared to the year ended December 31, 2021, primarily due to increases in market interest rates, which was partially offset by lower investment balances as we have utilized our cash to fund our operations.
See Note 7 to our Consolidated Financial Statements for additional information. Interest Income Interest income increased for the year ended December 31, 2023 compared to the year ended December 31, 2022, primarily due to increases in market interest rates, which was partially offset by lower investment balances as we have utilized our cash to fund our operations.
Accordingly, we reduced the liability to zero as of March 31, 2022 and recognized a corresponding gain in the change in fair value of development derivative liability. The agreement was subsequently terminated in May 2022.
Change in Fair Value of Development Derivative Liability We recorded a gain for the change in fair value of development derivative liability in the three months ended March 31, 2022 because we decided to discontinue the development of bempegaldesleukin, and therefore reduced the liability to zero as of March 31, 2022.
We paid $5.7 million and $15.0 million for the purchase or construction of property, plant and equipment in the years ended December 31, 2022 and 2021, respectively.
We paid $5.7 million for the purchase or construction of property, plant and equipment in the years ended December 31, 2022, and we also received $13.2 million from the sales of property, plant and equipment, primarily from the sale of our research and development facility in India during the year ended December 31, 2022.
We expect that cash flows used in operating activities, excluding upfront, milestone and other contingent payments received, if any, will decrease for 2023 as compared to 2022 because we do not expect any further costs for the wind down of the bempegaldesleukin program and the various cost restructuring activities described above to be significant.
We expect that cash flows used in operating activities, excluding upfront, milestone and other contingent payments received, if any, will increase for 2024 as compared to 2023 due to the development of rezpegaldesleukin in the Phase 2b trials discussed above.
Through optimal engagement of the IL-15 receptor complex, NKTR-255 is designed to enhance functional NK cell populations and formation of long-term immunological memory, which may lead to sustained and durable anti-tumor immune response. Preclinical findings suggest NKTR-255 has the potential to synergistically combine with antibody-dependent cellular cytotoxicity molecules as well as to enhance CAR-T therapies.
Through optimal engagement of the IL-15 receptor complex, NKTR-255 is designed to enhance functional NK cell populations and formation of long-term immunological memory, which may lead to sustained and durable anti-tumor immune response. We are continuing select developmental studies of NKTR-255 in combination with cell therapies and checkpoint inhibitors while we evaluate additional strategic partnership pathways for the program.
For the remaining three quarters of 2022, we reported third party costs for the wind down of the bempegaldesleukin program in restructuring, impairment and other costs of terminated program.
For the remaining three quarters of 2022 and all of 2023, we report third party costs for the wind down of the bempegaldesleukin program in restructuring, impairment and costs of terminated program. The amounts for the quarter ended March 31, 2022 includes a net reduction of $15.1 million for the BMS reimbursement.
The table also presents other costs and overhead consisting of personnel, facilities and other indirect costs (in thousands): Clinical Study Status (1) Year Ended December 31, 2022 2021 Bempegaldesleukin (CD122-preferential IL-2 pathway agonist) (2) Terminated 29,614 107,928 NKTR-255 (IL-15 receptor agonist) Phase 1/2 27,670 25,390 Rezpegaldesleukin (cytokine Treg stimulant) (3) Phase 1/2 11,148 9,376 Discovery research, manufacturing and other costs Various 10,812 34,200 Total clinical development, contract manufacturing and other third party costs 79,244 176,894 Personnel, overhead and other costs (4) 103,848 158,732 Stock-based compensation and depreciation 35,231 64,643 Research and development expense $ 218,323 $ 400,269 _______________________________________________________________ (1) Clinical Study Status definitions are provided in Part I, Item 1.
The table also presents other costs and overhead consisting of personnel, overhead and other indirect costs as we utilize our employee and infrastructure resources across multiple development and research programs (in thousands): 44 Table of Contents Clinical Study Year Ended December 31, Status(1) 2023 2022 Bempegaldesleukin (CD122-preferential IL-2 pathway agonist)(2) Terminated — 29,614 NKTR-255 (IL-15 receptor agonist) Phase 1/2 26,132 27,670 Rezpegaldesleukin (cytokine Treg stimulant)(3) Phase 2b 14,554 11,148 NKTR-0165 (tumor necrosis factor receptor type II agonist) Preclinical 9,345 1,804 Discovery research, manufacturing and other costs Various 1,862 9,403 Total clinical development, contract manufacturing and other third party costs 51,893 79,639 Personnel, overhead and other costs(4) 45,503 103,453 Stock-based compensation and depreciation 16,766 35,231 Research and development expense $ 114,162 $ 218,323 (1) Clinical Study Status as of December 31, 2023.
Product Sales Product sales include predominantly fixed price manufacturing and supply agreements with our collaboration partners and are the result of firm purchase orders from those partners. The timing of shipments is based solely on the demand and requirements of our collaboration partners and is not ratable throughout the year.
We recognize revenue when we transfer promised goods or services to our collaboration partners. • Product sales and Cost of goods sold: Product sales include predominantly fixed price manufacturing and supply agreements with our collaboration partners and are the result of firm purchase orders from those partners.
We believe this program has applications in a number of therapeutic indications including oncology as well as in other infectious diseases. We have historically derived all of our revenue and substantial amounts of research and development operating capital from our collaboration agreements.
We have historically derived substantially all of our revenue and significant amounts of research and development operating capital from our collaboration agreements.
Non-cash Royalty Revenue Related to Sales of Future Royalties For a discussion of our Non-cash royalty revenue, please see our discussion below “Non-Cash Royalty Revenue and Non-Cash Interest Expense.” License, Collaboration and Other Revenue License, collaboration and other revenue includes the recognition of upfront payments, milestone and other contingent payments received in connection with our license and collaboration agreements and certain research and development activities.
See Note 5 to our Consolidated Financial Statements for additional information. • License, collaboration and other revenue: License, collaboration and other revenue includes the recognition of upfront payments, milestone and other contingent payments received in connection with our license and collaboration agreements.
Research and development expense (in thousands, except percentages) Year Ended December 31, Increase/ (Decrease) 2022 vs. 2021 Percentage Increase/ (Decrease) 2022 vs. 2021 2022 2021 Research and development expense $ 218,323 $ 400,269 $ (181,946) (45) % Research and development expense consists primarily of clinical study costs, contract manufacturing costs, direct costs of outside research, materials, supplies, licenses and fees as well as personnel costs (including salaries, benefits, and stock-based compensation).
Research and Development Expense Research and development expense consists primarily of clinical study costs, contract manufacturing costs, direct costs of outside research, materials, supplies, licenses and fees as well as personnel costs (including salaries, benefits, and non-cash stock-based compensation). Research and development expense also includes certain overhead allocations consisting of support and facilities-related costs.
We continue to make significant investments in building and advancing our pipeline of drug candidates as we believe that this is the best strategy to build long-term shareholder value. 41 In April 2022, we announced new strategic reorganization and cost restructuring plans (together, the 2022 Restructuring Plan) focused on prioritizing key research and development efforts that will be most impactful to the Company’s future, including our rezpegaldesleukin (previously referred to as NKTR-358) and NKTR-255 programs and several core research programs.
We continue to make significant investments in building and advancing our pipeline of drug candidates as we believe that this is the best strategy to build long-term shareholder value.
As discussed in Note 11 to our Consolidated Financial Statements, we have implemented our 2022 Restructuring Plan to reduce our workforce by approximately 70%. As a result of our 2022 Restructuring Plan, the commercial organization was eliminated and all other bempegaldesleukin-related pre-commercialization activities ceased.
As a result of our 2022 Restructuring Plan, the commercial organization was eliminated and all other bempegaldesleukin-related commercialization activities ceased. Accordingly, as a result of these Restructuring Plans, general and administrative expense decreased for year ended December 31, 2023 as compared to the year ended December 31, 2022.
TNFR2 signaling drives immunoregulatory function and can provide a direct protective effect for tissue cells. Our focus is on TNFR2 antibody candidates that show selective Treg cell binding and signaling profiles that may be developed for treatment of autoimmune diseases.
TNFR-2 is highly expressed on Tregs, neuronal cells and endothelial cells and has been shown to potentiate the suppressive effects and overall functional properties of Tregs. Our focus on TNFR2 antibody candidates that show selective Treg cell binding and signaling profiles that may be developed for treatment of autoimmune diseases, such as ulcerative colitis, multiple sclerosis and vitiligo.
For the year ended December 31, 2021, we recorded $101.5 million as a reduction of research and development expense for the net reimbursement from BMS.
Accordingly, research and development expense decreased by $29.6 million for the year ended December 31, 2023, as compared to the year ended December 31, 2022 for third-party costs, net of the BMS reimbursement, for the termination of the bempegaldesleukin program.
Non-cash interest expense for the 2012 Purchase and Sales Agreement decreased significantly for the year ended December 31, 2022 compared to the year ended December 31, 2021 due to the lower effective interest rate as a result of the revaluation of the liability.
Research and development expense also decreased for the year ended December 31, 2023, as compared to the year ended December 31, 2022, due to lower allocations of support and facilities-related costs, primarily as a result of these Restructuring Plans.
Due to the potential for adverse developments in the credit markets, we may experience reduced liquidity with respect to some of our investments in marketable securities. These investments are generally held to maturity, which, in accordance with our investment policy, is less than two years.
Accordingly, there is increased uncertainty as to whether or when we will be able to enter into a sublease as well as the economic terms of such subleases, if any. Due to the potential for adverse developments in the credit markets, we may experience reduced liquidity with respect to some of our investments in marketable securities.
Non-cash interest expense decreased significantly for the year ended December 31, 2022 as compared to the year ended December 31, 2021 primarily due to the decrease in the effective interest rate for the 2012 Purchase and Sale Agreement. 2012 Purchase and Sale Agreement Non-cash royalty revenue for the 2012 Purchase and Sale Agreement resulting from net sales of CIMZIA ® and MIRCERA ® for the year ended December 31, 2022 decreased as compared to the year ended December 31, 2021 due to a decrease in the net sales of CIMZIA ® and MIRCERA ® .
We expect non-cash royalty revenue to decrease for 2024 as compared to 2023 due to decrease in royalty rate from UCB, and we expect non-cash interest expense to decrease as a result of the lower liability balance.
On February 23, 2023, we announced the topline data from the Phase 2 study of rezpegaldesleukin in adult patients with systemic lupus erythematosus (SLE) (Phase 2 Lupus Study).
On October 13, 2023, we announced final efficacy data from a Phase 1b study of rezpegaldesleukin in adult patients with atopic dermatitis (Phase 1b AD Study) at the European Academy of Dermatology and Venereolgy conference.
A third investigator sponsored study is evaluating NKTR-255 in combination with darvulamab in patients with unresectable Stage 3 non-small lung cancer who have received chemoradiation.
Under the collaboration, we will contribute NKTR-255 and AbelZeta will add NKTR-255 to its ongoing AbelZeta-sponsored Phase 1 clinical trial. We also have an ongoing investigator sponsored study evaluating NKTR-255 in combination with IMFINZI (darvulumab) in patients with unresectable Stage 3 NSCLC who have received chemoradiation.
Product sales decreased for the year ended December 31, 2022, as compared to the year ended December 31, 2021, due to decreased demand from our collaboration partners. We expect product sales for 2023 to be consistent with 2022.
Accordingly, the revenue recognized in a given period is based solely on the demand and requirements of our collaboration partners and is not ratable throughout the year. We expect product sales to increase for 2024 as compared to 2023 due to increased demand from our partners with a corresponding increase in cost of goods sold.