Biggest changeComparison of Years Ended December 31, 2022 and 2021 Revenue The following table summarizes our revenue by collaboration partner during the respective periods: Year Ended December 31, 2022 2021 Change (in thousands) AbbVie $ 18,563 $ 11,546 $ 7,017 Amgen 4,967 8,488 (3,521 ) Astellas 20,491 17,278 3,213 Bristol Myers Squibb 9,142 - 9,142 Total Revenue $ 53,163 $ 37,312 $ 15,851 The increase in revenue of $15.9 million for 2022 compared to 2021 was primarily due to: • An increase in revenue from AbbVie primarily driven by a higher percentage of project completion under the CD71 Agreement and a cumulative adjustment from a change in estimate of $4.4 million due to completion of performance obligation of the second target under the Discovery Agreement in the current year; • An increase in revenue from Astellas under the Astellas Agreement primarily driven by a higher percentage of completion for existing targets and initiation of pre-clinical research and development on a new target selected in current year; • An increase in revenue from Bristol Myers Squibb under the BMS Agreement due to initiation and progress of pre-clinical research for new targets selected in current year, offset by; • A decrease in revenue from Amgen under the Amgen Agreement driven by lower percentage of completion of the CX-904 program in the current year due to an increase in projected hours-to-completion. 81 Operating Costs and Expenses Research and Development Expenses The following table summarizes our research and development expenses by program incurred during the respective periods presented: Year Ended December 31, 2022 2021 Change External costs incurred by product candidate (target): (in thousands) Praluzatamab ravtansine, CX-2009 (CD166) $ 15,809 $ 18,516 $ (2,707 ) CX-2029 (CD71) 9,708 11,556 (1,848 ) Pacmilimab, CX-072 (PD-L1) 948 3,535 (2,587 ) CX-904 (EGFRxCD3) 2,822 3,522 (700 ) Other wholly owned and partnered programs 14,024 13,831 193 General research and development expenses 13,338 13,534 (196 ) 56,649 64,494 (7,845 ) Internal costs 55,000 49,700 5,300 Total research and development expenses $ 111,649 $ 114,194 $ (2,545 ) Research and development expenses decreased by $2.5 million for 2022, compared to 2021 primarily driven by a decrease in clinical trial and lab contract services for CX-2009, CX-072, CX-2029, CX-904 and pre-clinical programs, offset by $5.3 million restructuring expenses which are primarily included in internal costs.
Biggest changeComparison of Years Ended December 31, 2023 and 2022 Revenue The following table summarizes our revenue by collaboration partner during the respective periods: Year Ended December 31, 2023 2022 Change (in thousands) AbbVie $ 3,688 $ 18,563 $ (14,875 ) Amgen 5,739 4,967 772 Astellas 24,453 20,491 3,962 Bristol Myers Squibb 49,300 9,142 40,158 Regeneron 7,194 — 7,194 Moderna 10,840 — 10,840 Total Revenue $ 101,214 $ 53,163 $ 48,051 The increase in revenue of $48.1 million for 2023 compared to 2022 was primarily due to: • An increase in revenue under the BMS Agreement driven by higher percentage of completion of the existing and new targets selected in 2022; • An increase in revenue under the Regeneron Agreement and Moderna Agreement due to new preclinical studies that commenced during the current year; • An increase in revenue under the Astellas Agreement primarily driven by a $5.0 million clinical candidate milestone achieved in January 2023; • An increase in revenue under the Amgen Agreement driven by higher percentage of completion the CX-904 development in the current year primarily due to an increase in projected hours-to-completion in prior year; • A decrease in revenue under the AbbVie Agreement due to termination of the agreement in March 2023. 79 Operating Costs and Expenses Research and Development Expenses The following table summarizes our research and development expenses by program incurred during the respective periods presented: Year Ended December 31, 2023 2022 Change External costs incurred by product candidate (target): (in thousands) CX-904 (EGFRxCD3) $ 2,790 $ 2,822 $ (32 ) Praluzatamab ravtansine, CX-2009 (CD166) 2,671 15,809 (13,138 ) CX-2029 (CD71) 2,608 9,708 (7,100 ) Pacmilimab, CX-072 (PD-L1) (120 ) 948 (1,068 ) Other wholly owned and partnered programs 25,525 14,024 11,501 General research and development expenses 9,906 13,338 (3,432 ) Total external costs 43,380 56,649 (13,269 ) Internal costs 34,300 55,000 (20,700 ) Total research and development expenses $ 77,680 $ 111,649 $ (33,969 ) Research and development expenses decreased by $34.0 million for 2023, compared to 2022 primarily driven by a decrease in personnel related expenses as a result of the workforce reduction in 2022, as well as winding down of laboratory contract services and clinical study activities related to the CX-2009 and CX-2029 programs, partially offset by an increase in laboratory contract services related to IND enabling activities for CX-2051 and CX-801 programs.
Valuation allowances are provided, if based upon the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. 80 We also account for uncertain tax positions in accordance with the provisions of ASC 740 .
Valuation allowances are provided, if based upon the weight of available evidence, it is more likely than not that some or all of the deferred tax assets will not be realized. We also account for uncertain tax positions in accordance with the provisions of ASC 740 .
Revenue from variable payments related to research and development or milestones and other contingent payments, when it is probable that there will not be a significant revenue reversal, are also recognized over the performance period based on a similar method.
Revenue from variable payments related to research and development or milestones and other contingent payments, when it is probable that there will not be a significant revenue reversal, is also recognized over the performance period based on a similar method.
Interest Income Interest income primarily consists of interest income from our cash equivalents and investments, and accretion of discounts or amortization of premiums on our investments. Other Income (Expense), Net Other income (expense), net consists primarily of gains and losses resulting from changes to currency exchange rates.
Interest Income Interest income primarily consists of interest income from our cash equivalents and investments, and accretion of discounts or amortization of premiums on our investments. 78 Other Income (Expense), Net Other income (expense), net consists primarily of gains and losses resulting from changes to currency exchange rates.
We expect that any revenue we generate in the foreseeable future will fluctuate from year to year as a result of the timing and amount of milestones and other 79 payments from our collaboration agreements with AbbVie, Amgen, Astellas, Bristol Myers Squibb, Regeneron, Moderna and any other collaboration partners, and as a result of the fluctuations in the research and development expenses we incur in the performance of assigned activities under these agreements.
We expect that any revenue we generate in the foreseeable future will fluctuate from year to year as a result of the timing and amount of milestones and other payments from our collaboration agreements with Amgen, Astellas, Bristol Myers Squibb, Regeneron, Moderna and any other collaboration partners, and as a result of the fluctuations in the research and development expenses we incur in the performance of assigned activities under these agreements.
We determine the estimated costs through discussions with internal personnel and external service providers as to the progress of stage of completion of the services and the agreed-upon fees to be paid for such services. 88 We make significant judgments and estimates in determining the accrual balance in each reporting period. As actual costs become known, we adjust our accruals.
We determine the estimated costs through discussions with internal personnel and external service providers as to the progress of stage of completion of the services and the agreed-upon fees to be paid for such services. 84 We make significant judgments and estimates in determining the accrual balance in each reporting period. As actual costs become known, we adjust our accruals.
Cash Flows from Investing Activities During year ended December 31, 2022, cash provided by investing activities was $98.3 million, which consisted of $100.0 million in proceeds received upon the maturity of short-term marketable securities, partially offset by $1.7 million of capital expenditures used to purchase property and equipment.
During year ended December 31, 2022, cash provided by investing activities was $98.3 million, which consisted of $100.0 million in proceeds received upon the maturity of short-term marketable securities, partially offset by $1.7 million of capital expenditures used to purchase property and equipment.
We evaluate the measure of progress each reporting period and, if necessary, we adjust the measure of performance and related revenue recognition. There have been changes in estimates of research service periods and/or the related estimated FTE hours-to-completion of certain of our research development programs in 2022 and 2021.
We evaluate the measure of progress each reporting period and, if necessary, we adjust the measure of performance and related revenue recognition. There have been changes in estimates of research service periods and/or the related estimated FTE hours-to-completion of certain of our research development programs in each reporting period.
Such adjustments have impacted and may continue to impact the amounts and timing of our revenue recognized. Any consideration payable to our customers is treated as a reduction to the transaction price and revenue, unless the payment to the customer is in exchange for distinct good and services.
Such adjustments have impacted and will continue to impact the amounts and timing of our revenue recognized. Any consideration payable to our customers is treated as a reduction to the transaction price and revenue, unless the payment to the customer is in exchange for distinct good and services.
As of December 31, 2022, no sales-based milestones have been recognized. The transaction price in each arrangement is allocated to the identified performance obligations based on the relative standalone selling price (“SSP”) of each distinct performance obligation, which requires judgment.
As of December 31, 2023, no sales-based milestones have been recognized. The transaction price in each arrangement is allocated to the identified performance obligations based on the relative standalone selling price (“SSP”) of each distinct performance obligation, which requires judgment.
Overview We are a clinical-stage, oncology-focused biopharmaceutical company focused on developing novel conditionally activated, biologics localized to the tumor microenvironment. We aim to build a commercial enterprise to maximize our impact on the treatment of cancer.
Overview We are a clinical-stage, oncology-focused biopharmaceutical company focused on developing novel, conditionally activated biologics designed to be localized to the tumor microenvironment. We aim to build a commercial enterprise to maximize our impact on the treatment of cancer.
(the “Regeneron Agreement”) to collaborate on preclinical research activities to discover and develop certain antibody compounds for the treatment of cancer using the Company’s Probody therapeutic technology. Pursuant to the Regeneron Agreement, we collected an upfront fee of $30.0 million. In December 2022, we entered into a Collaboration and License Agreement with ModernaTX, Inc.
In November 2022, we entered into a Collaboration and License Agreement with Regeneron Pharmaceuticals, Inc. (the “Regeneron Agreement”) to collaborate on preclinical research activities to discover and develop certain antibody compounds for the treatment of cancer using the Company’s PROBODY therapeutic technology. Pursuant to the Regeneron Agreement, we collected an upfront fee of $30.0 million.
We incurred aggregate restructuring charges of approximately $7.7 million, primarily related to one-time severance payments and other employee-related costs. Based upon our current operating plan, we expect our existing capital resources will be sufficient to fund operations into 2025.
We incurred aggregate restructuring charges of approximately $7.5 million, primarily related to one-time severance payments and other employee-related costs. Based upon our current operating plan, we expect our existing capital resources will be sufficient to fund operations into the second half of 2025.
Sublicense fees payable to UCSB for potential milestones that are probable to be earned by the Company in 2023 are not included. (3) We have annual license maintenance fees under the terms of certain license agreement with UCSB. See Part II. Item 8.
Sublicense fees payable to UCSB for potential milestones that are probable to be earned by the Company in 2024 are not included. (3) We have annual license maintenance fees under the terms of certain license agreement with UCSB and SGEN. See Part II. Item 8.
For a discussion related to the results of operations for 2021 compared to 2020, refer to Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations - Comparison of Years Ended December 31, 2021 and 2020" in Amendment No.1 to our Annual Report on Form 10-K/A for the year ended December 31, 2021 filed with the SEC on March 27, 2023.
For a discussion related to the results of operations for 2022 compared to 2021, refer to Part II, Item 7, "Management's Discussion and Analysis of Financial Condition and Results of Operations - Comparison of Years Ended December 31, 2022 and 2021" in our Annual Report on Form 10-K for the year ended December 31, 2022 filed with the SEC on March 27, 2023.
To date, we have financed our operations primarily through sales of our common stock in conjunction with the IPO, subsequent stock offerings and through our at-the-market offering, sales of our convertible preferred securities prior to our IPO and payments received under our collaboration agreements.
To date, we have financed our operations primarily through sales of our common stock in conjunction with the IPO, subsequent stock offerings and through our at-the-market offering, sales of our convertible preferred securities prior to our IPO, payments received under our collaboration agreements and proceeds from private placements of our common stock, warrants and pre-funded warrants.
On July 13, 2022, we announced a restructuring plan to prioritize resources on our emerging pre-clinical and early clinical pipeline as well as our existing collaboration partnerships. The restructuring plan resulted in a reduction to our workforce by approximately 40%, and is substantially completed by the fourth quarter of 2022.
We received gross proceeds of approximately $30.0 million. On July 13, 2022, we announced a restructuring plan to prioritize resources on our emerging pre-clinical and early clinical pipeline as well as our existing collaboration partnerships. The restructuring plan resulted in a reduction to our workforce by approximately 40%, and was substantially completed by the fourth quarter of 2022.
Praluzatamab ravtansine is our conditionally activated ADC directed toward CD166 and is being evaluated in a three-arm study in patients with advanced human epidermal growth factor receptor 2 (“HER2”)-non-amplified breast cancer. Arms A and B examined praluzatamab ravtansine monotherapy in patients with hormone receptor-positive/HER2-non-amplified breast cancer and triple-negative breast cancer (“TNBC”), respectively.
Praluzatamab ravtansine is our conditionally activated ADC directed toward CD166 which was previously evaluated in a three-arm Phase 2 study in patients with advanced human epidermal growth factor receptor 2 (“HER2”)-non-amplified breast cancer. Arms A and B examined praluzatamab ravtansine monotherapy in patients with hormone receptor-positive/HER2-non-amplified breast cancer and TNBC, respectively.
Changes in these estimates that result in material changes to our accruals could materially affect our financial condition and results of operations. Uncertain Tax Position We file income taxes in the U.S. federal jurisdiction, the state of California and various other U.S. states. We are currently under examination by the state of California for the years 2017 and 2018.
Changes in these estimates that result in material changes to our accruals could materially affect our financial condition and results of operations. Uncertain Tax Position We file income taxes in the U.S. federal jurisdiction, the state of California and various other U.S. states.
Cash Flows from Financing Activities During the year ended December 31, 2022, cash provided by financing activities consisted of $0.6 million of proceeds from the exercise of stock options and employee stock purchases under the employee stock purchase plan (“ESPP”).
Cash Flows from Financing Activities During the year ended December 31, 2023, cash provided by financing activities consisted of $29.7 million of net proceeds from issuance of pre-funded warrants and warrants and $0.6 million of proceeds from the exercise of stock options and employee stock purchases under the employee stock purchase plan (“ESPP”).
The non-cash charges primarily consisted of $13.2 million in stock-based compensation, $3.1 million in non-cash lease expense, $2.7 million in depreciation and amortization and $0.3 million in net accretion of discounts on our investments.
The non-cash charges primarily consisted of $13.1 million in stock-based compensation, $3.4 million in non-cash lease expense and $2.7 million in depreciation, amortization, and impairment charges.
The non-cash charges primarily consisted of $13.1 million in stock-based compensation, $3.4 million in non-cash lease expense and $2.7 million in depreciation, amortization, and impairment charges. 85 The change in our net operating assets and liabilities was primarily due to: • an increase of $35.2 million in accounts receivable primarily related to the upfront payment and prepaid research under the Moderna Agreement entered into in December 2022; • a decrease of $9.8 million in accrued liabilities and accounts payable primarily due to timing of payments; • a decrease of $2.3 million in cash flows from prepaid expenses and other current assets and other assets primarily due to increase in advance payments to our third-party manufacturing vendors and timing of payments; • a net increase of $16.6 million in deferred revenue consisting of an increase of $69.6 million in deferred revenue related to new agreements with Regeneron and Moderna partially offset by a decrease of $53.0 million resulting from the continued recognition of deferred revenue from existing customers. 2021 During the year ended December 31, 2021, cash used in operating activities was $119.0 million, which consisted of a net loss of $115.9 million, adjusted by non-cash charges of $19.3 million and a net decrease of $22.4 million relating to the changes in our net operating assets and liabilities.
The non-cash charges primarily consisted of $8.6 million in stock-based compensation, $3.7 million in non-cash lease expense and $2.1 million in depreciation and amortization, offset by $7.4 million in net accretion of discounts on our investments. 81 The change in our net operating assets and liabilities was primarily due to: • a net decrease of $89.0 million in deferred revenue resulting from the continued recognition of deferred revenue from existing and new customers; • a decrease of $8.5 million in accounts payable, accrued and other long-term liabilities primarily due to decrease of payroll-related expenses, restructuring related expenses, and laboratory contract services; offset by • an increase of $32.6 million in cash flows from accounts receivable primarily related to the receipt of the $35.0 million upfront payment and prepaid research under the Moderna agreement entered into in December 2022. • an increase of $2.5 million in cashflows from prepaid and other current assets primarily due to a decrease in advance payments to our third party manufacturing vendors and timing of payments. 2022 During the year ended December 31, 2022, cash used in operating activities was $110.8 million, which consisted of a net loss of $99.3 million and a net decrease of $30.7 million relating to the change of our net operating assets and liabilities, offset by non-cash charges of $19.2 million.
Summary Statement of Cash Flows The following table summarizes our cash flows for the periods indicated: Year Ended December 31, 2022 2021 (in thousands) Net cash provided by (used in) operating activities $ (110,788 ) $ (119,031 ) Net cash provided by (used in) by investing activities 98,260 22,489 Net cash provided by financing activities 648 110,213 Net increase (decrease) in cash, cash equivalents and restricted cash $ (11,880 ) $ 13,671 Cash Flows from Operating Activities 2022 During the year ended December 31, 2022, cash used in operating activities was $110.8 million, which consisted of a net loss of $99.3 million and a net decrease of $30.7 million relating to the change of our net operating assets and liabilities, offset by non-cash charges of $19.2 million.
Summary Statement of Cash Flows The following table summarizes our cash flows for the periods indicated: Year Ended December 31, 2023 2022 (in thousands) Net cash used in operating activities $ (56,035 ) $ (110,788 ) Net cash (used in) provided by investing activities (150,674 ) 98,260 Net cash provided by financing activities 30,230 648 Net decrease in cash, cash equivalents and restricted cash $ (176,479 ) $ (11,880 ) Cash Flows from Operating Activities 2023 During the year ended December 31, 2023, cash used in operating activities was $56.0 million, which consisted of a net loss of $0.6 million and a net decrease of $62.4 million relating to the change of our net operating assets and liabilities, offset by non-cash charges of $7.0 million.
During the year ended December 31, 2021, cash provided by investing activities was $22.5 million, which consisted of $124.0 million in proceeds received upon the maturity of short-term marketable securities, partially offset by $99.9 million used in the purchase of long-term investments and $1.6 million of capital expenditures used to purchase property and equipment.
Cash Flows from Investing Activities During year ended December 31, 2023, cash provided by investing activities was $150.7 million, which consisted of $424.8 million used in the purchase of short-term investments and $0.8 million of capital expenditures used to purchase property and equipment, partially offset by $275.0 million in proceeds received upon the maturity of marketable securities.
By pioneering a novel class of localized biologic drug candidates, powered by our Probody® therapeutic technology platform, we lead the field of conditionally activated oncology therapeutics and have established biologics localization as a strategic area of research and development.
By pioneering a novel class of localized biologic drug candidates, powered by our PROBODY® therapeutic technology platform, we lead the field of conditionally activated oncology therapeutics and have established biologics localization as a strategic area of research and development. Our vision is to transform lives with safer, more effective therapies with the goal to address major unmet needs in oncology.
During the year ended December 31, 2021, cash provided by financing activities was $110.2 million, which consisted of $107.7 million of net proceeds from the follow-on public offering in January and February 2021 and $2.5 million of proceeds from the exercise of stock options and employee stock purchases under the employee stock purchase plan. 86 Contractual Obligations The following table summarizes our contractual obligations that become due within the next twelve months (in thousands): Payments Due by 2023 Operating leases (1) $ 5,420 Royalty obligations (2) 150 License maintenance fees (3) 750 Total contractual obligations $ 6,320 (1) We lease our current facility under a long-term operating lease, which expires in 2026.
During the year ended December 31, 2022, cash provided by financing activities consisted of $0.6 million of proceeds from the exercise of stock options and employee stock purchases under the ESPP. 82 Contractual Obligations The following table summarizes our contractual obligations that become due within the next year (in thousands): Payments Due by 2024 Operating leases (1) $ 5,572 Royalty obligations (2) 150 License maintenance fees (3) 1,050 Milestone Payments (4) 5,456 Total contractual obligations $ 12,228 (1) We lease our current facility under a long-term operating lease, which expires in 2026.
Interest Income and Other Expense, Net Year Ended December 31, 2022 2021 Change (in thousands) Interest income $ 1,678 $ 255 $ 1,423 Other expense, net 340 (83 ) 423 Total interest income and other expense $ 2,018 $ 172 $ 1,846 Interest Income Interest income increased by $1.4 million during 2022 compared to 2021, primarily driven by higher interest rates in 2022.
Interest Income and Other Income (Expense), Net Year Ended December 31, 2023 2022 Change (in thousands) Interest income $ 9,837 $ 1,678 $ 8,159 Other income (expense), net (30 ) 340 (370 ) Total interest income and other expense $ 9,807 $ 2,018 $ 7,789 Interest Income Interest income increased by $8.2 million during 2023 compared to 2022, primarily driven by higher interest rates in 2023.
For example, changes in our estimated research service period resulted in recognition of higher total revenue of $0.5 million in 2022 and lower total revenue of $9.3 million in 2021, as compared to the estimates in place at the end of the prior period.
For example, changes in our estimated research service period resulted in recognition of higher total revenue of $8.2 million for certain programs in aggregate and lower total revenue of $6.0 million for other programs in aggregate, in the fourth quarter of 2023, as compared to the estimates in place at the end of the third quarter of 2023.
The determination as to whether the tax benefit will more likely than not be realized is based upon the technical merits of the tax position as well as consideration of the available facts and circumstances. On March 27, 2020, the Coronavirus Aid, Relief, and Economic Security Act (CARES Act) was enacted in response to the COVID-19 pandemic.
The determination as to whether the tax benefit will more likely than not be realized is based upon the technical merits of the tax position as well as consideration of the available facts and circumstances.
Due to the ongoing nature of the examination and discussions with the state of California, we are unable to estimate a date by which this matter will be resolved or reasonably estimate the potential impact should the tax position be revised.
We filed a protest to contest the proposed assessment in November 2023. Due to the ongoing nature of the examination and discussions with the state of California, we are unable to estimate a date by which this matter will be resolved. Item 7A.
IFNa2b provides a potentially superior approach to activating anti-tumor immune responses than other cytokines. CX-801 is a dually masked, conditionally activated version of IFNa2b that has the potential to become a unique centerpiece of combination therapy for a wide range of tumor types.
CX-801 is a dually masked, conditionally activated version of IFNα2b that has the potential to become a cornerstone of combination therapy for a wide range of tumor types.
The change of our net operating assets and liabilities was primarily due to: • a net decrease of $33.9 million in deferred revenue resulting from the continued recognition of deferred revenue from existing customers; • an increase of $7.4 million in accrued liabilities and accounts payable primarily due to timing of payments and an increase in research and clinical expenses • an increase of $4.1 million in cash flows from prepaid expenses and other current assets and other assets primarily due to reduced advance payments to our third-party manufacturing vendors and timing of payments.
The change in our net operating assets and liabilities was primarily due to: • an increase of $35.2 million in accounts receivable primarily related to the upfront payment and prepaid research under the Moderna Agreement entered into in December 2022; • a decrease of $9.8 million in accrued liabilities and accounts payable primarily due to timing of payments; • a decrease of $2.3 million in cash flows from prepaid expenses and other current assets and other assets primarily due to increase in advance payments to our third-party manufacturing vendors and timing of payments; • a net increase of $16.6 million in deferred revenue consisting of an increase of $69.6 million in deferred revenue related to new agreements with Regeneron and Moderna partially offset by a decrease of $53.0 million resulting from the continued recognition of deferred revenue from existing customers.
The above table also excludes unrecognized tax benefits of $9.3 million as of December 31, 2022 because these uncertain tax positions, if recognized, would be an adjustment to our deferred tax assets, which are subject to a valuation allowance. Segment Information We have one primary business activity and operate as one reportable segment.
The above table also excludes unrecognized tax benefits of $2.3 million as of December 31, 2023 related to uncertain tax position which would affect the Company’s effective tax rate if recognized. Segment Information We have one primary business activity and operate as one reportable segment.
Arm C studied praluzatamab ravtansine in combination with pacmilimab (CX-072), our wholly-owned PD-L1 inhibitor, in patients with TNBC. In July 2022, Phase 2 topline results were disclosed for Arms A and B as of the data cut-off date of May 2022. Arm A met the primary endpoint of confirmed objective response rate greater than 10% by central radiology review.
Arm C studied praluzatamab ravtansine in combination with pacmilimab (CX-072), our wholly-owned PD-L1 inhibitor, in patients with TNBC. In July 2022, the Company disclosed topline data demonstrating praluzatamab ravtansine met the primary efficacy endpoint of confirmed objective response rate greater than 10 percent in hormone receptor-positive/HER2-non-amplified breast cancer.
We currently have more than 15 active drug discovery and/or development programs. We do not have any products approved for sale, and we continue to incur significant research and development and general administrative expenses related to our operations. We are not profitable and have incurred losses in each year since our founding in 2008.
We currently have more than 15 active drug discovery and/or development programs. We do not have any products approved for sale, and we continue to incur significant research and development and general administrative expenses related to our operations. As of December 31, 2023 and December 31, 2022, we had an accumulated deficit of $723.4 million and $722.9 million, respectively.
We assess whether the promises in our arrangements with customers are considered as distinct performance obligations that should be accounted for separately.
We assess whether the promises in our arrangements with 83 customers are considered as distinct performance obligations that should be accounted for separately. Judgment is required to determine whether the license to our intellectual property is distinct from the research and development services or participation on steering committees.
An IND submission for CX-801 is planned in the second half of 2023. 78 We are also continuously engaged in drug discovery efforts towards the generation of new clinical candidates across multiple modalities for the treatment of cancer, including additional ADCs, Cytokines, TCBs, and most recently, mRNAs reflecting the versatility of our Probody platform.
The final Phase 2 study data in advanced breast cancer were presented at the San Antonio Breast Cancer Symposium in 2022. We are also continuously engaged in drug discovery efforts towards the generation of new clinical candidates across multiple modalities for the treatment of cancer, including additional ADCs, Cytokines, TCEs, and mRNAs reflecting the versatility of our PROBODY platform.
Patient enrollment in the Phase 1 dose escalation portion of the study continues to progress. We reported in January 2023 that the initial single patient cohort phase of the study was complete and that the “3+3” patient cohort phase had been initiated.
We reported in January 2023 that the initial single patient cohort phase of the study was complete and that the “3+3” patient cohort phase had been initiated. Backfilling of certain dose escalation cohorts has also been initiated and dose ranging continues. Initial Phase 1a data in EGFR positive solid tumors is expected in the second half of 2024.
Components of Results of Operations Revenue Our revenue to date has been primarily derived from non-refundable license payments, milestone payments and reimbursements for research and development expenses under our research, collaboration, and license agreements.
As such, we are dependent on third parties to supply our product candidates according to our specifications, in sufficient quantities, on time, in compliance with appropriate regulatory standards and at competitive prices. 77 Components of Results of Operations Revenue Our revenue to date has been primarily derived from non-refundable license payments, milestone payments and reimbursements for research and development expenses under our research, collaboration, and license agreements.
(the “Moderna Agreement”) to collaborate on discovery and preclinical research and development activities to create investigational messenger RNA (mRNA) based conditionally activated therapies using the Company’s Probody therapeutic technology. Pursuant to the Moderna Agreement, we recorded a receivable for an upfront fee and prepaid research funding of $35.0 million, which has been collected in January 2023.
In December 2022, we entered into a Collaboration and License Agreement with ModernaTX, Inc. (the “Moderna Agreement”) to collaborate on discovery and preclinical research and development activities to create investigational messenger RNA (mRNA) based conditionally activated therapies using the Company’s PROBODY therapeutic technology.
These include the validation of potential new targets for antibody-drug conjugates (“ADCs”), opening solid tumor opportunities for T-cell engaging bispecific antibodies (“TCBs”), and increasing the therapeutic window for immune modulators such as cytokines and checkpoint inhibitors (“CPIs”). Additionally, we have recently initiated a research collaboration with our Probody platform beyond cancer into other therapeutic areas.
These include the validation of potential new targets for antibody-drug conjugates (“ADCs”), opening therapeutic window for novel T-cell engagers (“TCEs”) targeting solid tumors, and increasing the therapeutic index for immune modulators such as cytokines. We are also exploring the potential for our PROBODY platform in preclinical research in areas outside of oncology, including in our collaboration with Moderna.
Our pipeline also includes CX-2051, a wholly-owned conditionally activated ADC paired with a next-generation camptothecin payload and directed toward the epithelial cellular adhesion molecule (EpCAM). CX-2051 has been tailored to optimize the therapeutic index for the systemic treatment of EpCAM-expressing epithelial cancers where previous industry efforts targeting EpCAM have not been successful due to dose-limiting toxicities.
CX-2051 has been tailored to optimize the therapeutic index for the systemic treatment of EpCAM-expressing epithelial cancers where previous industry efforts targeting EpCAM have not been successful due to dose-limiting toxicities. CX-2051 has demonstrated a wide predicted therapeutic index and strong preclinical activity and tolerability in multiple preclinical models, including colorectal cancer.
Judgment is required to determine whether the license to our intellectual property is distinct from the research and development services or participation on steering committees. 87 Our collaboration and license agreements may include contingent payments related to specified research, development and regulatory milestones.
Our collaboration and license agreements may include contingent payments related to specified research, development and regulatory milestones.
In preclinical studies, CytomX’s Probody EGFRxCD3 bispecific therapeutics demonstrated anti-tumor activity and better tolerability when compared to EGFRxCD3 bispecifics without Probody masking. In May 2022, the first patient was dosed in a Phase 1 study evaluating CX-904 as a treatment for patients with advanced solid tumors.
In May 2022, the first patient was dosed in a Phase 1 study evaluating CX-904 as a treatment for patients with advanced solid tumors. Patient enrollment in the Phase 1 dose escalation portion of the study continues to progress.
Leveraging our deep scientific knowledge, we conceived of and constructed our Probody therapeutic platform which allows us to genetically engineer biologic therapeutic candidates to contain protease-cleavable masks. Our masking strategy is designed to reduce binding of biologic therapeutics to their targets until the mask is removed by proteases in the tumor microenvironment, providing more selective targeting of the tumor.
Our masking strategy is designed to reduce binding of biologic therapeutics to their targets until the mask is removed by proteases in the tumor microenvironment, providing more selective targeting of the tumor. We are employing our leading, conditional activation platform technology to address some of the biggest challenges in oncology biologics research and development.
The examination contests our tax position on revenue apportionment for upfront and milestone payments resulting from our collaboration and licensing agreements. As of the date of this filing, the state of California has not proposed adjustments to the tax returns.
The state of California contested our tax position on revenue apportionment for upfront and milestone payments resulting from our collaboration and licensing agreements for the years 2017 and 2018. We received a proposed assessment in September 2023 and filed a protest to contest the proposed assessment in November 2023.
Our goal is to transcend the limits of current cancer treatments by successfully leveraging therapeutic targets and strategies that were once thought to be inaccessible. Our proprietary and versatile Probody technology platform is designed to enable conditional activation of biologic therapeutic candidates within the tumor microenvironment, while minimizing drug activity in healthy tissues and circulation.
Our proprietary, versatile, multi-modality PROBODY technology platform is designed to enable conditional activation of potent biologic therapeutic candidates within the tumor microenvironment, while minimizing drug activity in healthy tissues and circulation. Our platform is built on a strong foundation of tumor biology expertise, including deep knowledge of tumor-associated enzymes known as proteases.
We currently have no manufacturing capabilities and do not intend to establish any such capabilities in the near term. As such, we are dependent on third parties to supply our product candidates according to our specifications, in sufficient quantities, on time, in compliance with appropriate regulatory standards and at competitive prices.
We currently have no manufacturing capabilities and do not intend to establish any such capabilities in the near term.
Our industry-leading platform is built on a strong foundation of tumor biology expertise, including deep knowledge of tumor-associated enzymes known as proteases. Proteases are tightly controlled in normal tissues but often poorly regulated and active in tumor microenvironments where they play important roles in cancer cell migration, invasion and metastasis.
Proteases are tightly controlled in normal tissues but often dysregulated and active in tumor microenvironments where they play important roles in cancer cell migration, invasion and metastasis. Leveraging our deep scientific knowledge, we conceived of and constructed our PROBODY therapeutic platform which allows us to genetically engineer biologic therapeutic candidates to contain protease-cleavable masks.
In the molecular design of CX-2051, an ADC, and CX-801, a masked cytokine, we have incorporated our platform expertise and clinical learnings to optimize predicted therapeutic index in order to potentially broaden the clinical utility of these promising targets through tumor localized conditional activation.
Our current clinical-stage molecules address targets or mechanisms that have been previously validated as having anti-cancer activity but have been limited in their utilization due to systemic toxicities. We have incorporated our significant platform expertise and clinical learnings to optimize predicted therapeutic index and the clinical potential of these promising agents through tumor localized conditional activation.
In February 2023, BMS prioritized BMS-986288 as its lead next-generation anti-CTLA-4 program over two other anti-CTLA-4 programs including BMS-986249. Reinforcing our leadership in the field of conditional activation, we recently advanced our first T-cell engaging bispecific antibody (TCB) into the clinic. CX-904, partnered with Amgen, is a conditionally activated TCB against EGFR and CD3.
Reinforcing our leadership in the field of conditional activation, in 2022 we advanced our first TCE into the clinic. CX-904, partnered with Amgen, is a conditionally activated TCE against EGFR and CD3. In preclinical studies, CytomX’s PROBODY EGFRxCD3 TCE demonstrated anti-tumor activity and better tolerability when compared to TCEs without PROBODY masking.
Financial Statements and Supplementary Data, Note 9 - “License Agreement” in the accompanying Notes to the financial statements for more information.
Financial Statements and Supplementary Data, Note 9 - “License Agreement” in the accompanying Notes to the financial statements for more information. (4) We have development milestone payments under the terms of certain license agreements. A development milestone is payable after dosing the first patient in a Phase 1 Clinical Study, which we expect to occur in 2024.
General and Administrative Expenses Year Ended December 31, 2022 2021 Change (in thousands) General and administrative $ 42,849 $ 39,160 $ 3,689 General and administrative expenses increased by $3.7 million for 2022, compared to 2021 primarily driven by $2.4 million of restructuring expenses and a $1.0 million increase in professional expenses related to new collaboration agreements.
General and Administrative Expenses Year Ended December 31, 2023 2022 Change (in thousands) General and administrative $ 30,018 $ 42,849 $ (12,831 ) General and administrative expenses decreased by $12.8 million for 2023, compared to 2022 primarily driven by a decrease in personnel related expenses as a result of the workforce reduction in 2022, reduced external vendor services, and lower building rent as a result of a partial sublease of the Company’s headquarters.
Having demonstrated favorable tolerability and encouraging anti-tumor activity in Phase 1 studies, CX-2029 entered into a four-cohort Phase 2 expansion study initially designed to enroll twenty-five efficacy evaluable patients per cohort 77 in the following malignancies: squamous non-small cell lung cancer (“sqNSCLC”), head and neck squamous cell carcinoma (“HNSCC”), esophageal and gastro-esophageal junction (“E/GEJ”) cancers, and diffuse large B-cell lymphoma (“DLBCL”).
In March 2023, following the completion of the Phase 2 Study in squamous non-small cell lung cancer (“sqNSCLC”), head and neck squamous cell carcinoma (“HNSCC”), esophageal and gastro-esophageal junction (“E/GEJ”) cancers, AbbVie notified CytomX that it would not advance CX-2029 into additional clinical studies and terminated the 2016 CD71 License and Collaboration Agreement.
We record the effect of an enacted change in a tax law in the period that includes the enactment date in accordance with ASC 740. On August 16, 2022, the Inflation Reduction Act of 2022 (“IRA”) was signed into law.
We recorded an uncertain tax position of $3.9 million in long term liabilities for the proposed tax assessment, penalties and interest through December 31, 2023. On August 16, 2022, the Inflation Reduction Act of 2022 (“IRA”) was signed into law.
We have utilized our multi-modality Probody platform to build a promising, broad pipeline of potential first-in-class and best-in-class therapeutics that includes four molecules in clinical testing including: CX-2029, a Probody ADC targeting CD71; CX-904, a conditionally activated TCB, targeting the epidermal growth factor receptor (“EGFR”) on tumor cells and the CD3 receptor on T cells and BMS-986288, a Probody version of a non-fucosylated anti-CTLA-4 antibody.
We have utilized our PROBODY therapeutic platform to build a promising, broad pipeline of potential first-in-class and best-in-class clinical-stage molecules.