Biggest changeResults of operations Comparison of the years ended December 31, 2024 and 2023 Years Ended December 31, 2024 2023 Increase/ (decrease) (in thousands) Revenue: Collaboration revenue $ — $ 11,580 $ (11,580 ) Total revenue — 11,580 (11,580 ) Operating expenses: Research and development 592,225 423,144 169,081 General and administrative 97,299 75,621 21,678 Total operating expenses 689,524 498,765 190,759 Loss from operations (689,524 ) (487,185 ) (202,339 ) Other income (expense), net: Interest income 86,883 47,482 39,401 Other expense (2,528 ) (303 ) (2,225 ) Change in fair value of warrant liability and contingent earn-out shares 4,323 115 4,208 Total other income, net 88,678 47,294 41,384 Loss before income taxes (600,846 ) (439,891 ) (160,955 ) Benefit from income taxes 753 3,524 (2,771 ) Net loss $ (600,093 ) $ (436,367 ) $ (163,726 ) 93 Collaboration revenue Collaboration revenue in 2023 consisted of revenue under the Sanofi Agreement, which was terminated in June 2023.
Biggest changeResults of operations Comparison of the years ended December 31, 2025 and 2024 Years Ended December 31, 2025 2024 Increase/ (decrease) (in thousands) Operating expenses: Research and development 987,332 592,225 395,107 General and administrative 195,037 97,299 97,738 Total operating expenses 1,182,369 689,524 492,845 Loss from operations (1,182,369 ) (689,524 ) (492,845 ) Non-operating income (expense), net: Interest income 90,694 86,883 3,811 Interest expense (24,231 ) — (24,231 ) Change in fair value of warrant liability and contingent earn-out shares (15,358 ) 4,323 (19,681 ) Other expense, net (37 ) (2,528 ) 2,491 Total non-operating income, net 51,068 88,678 (37,610 ) Loss before income taxes (1,131,301 ) (600,846 ) (530,455 ) Benefit from income taxes — 753 (753 ) Net loss $ (1,131,301 ) $ (600,093 ) $ (531,208 ) Research and development expenses Our research and development efforts during the year ended December 31, 2025 were focused on our clinical development programs and our preclinical programs.
Research and development expenses consist primarily of costs incurred for the development of our product candidates and costs associated with identifying compounds through our discovery platform, which include: • external costs incurred under agreements with third-party contract organizations, investigative clinical trial sites that conduct research and development activities on our behalf and consultants; • costs related to the production of preclinical, clinical and pre-launch materials, including fees paid to contract manufacturers; • laboratory and vendor expenses related to the execution of discovery programs, preclinical and clinical trials; • employee-related expenses, which include salaries, benefits and stock-based compensation; and 92 • facilities and other expenses, which include allocated expenses for rent and maintenance of facilities, depreciation and amortization expense, information technology and other supplies.
Research and development expenses consist primarily of costs incurred for the development of our product candidates and costs associated with identifying compounds through our discovery platform, which include: • external costs incurred under agreements with third-party contract organizations, investigative clinical trial sites that conduct research and development activities on our behalf and consultants; • costs related to the production of preclinical, clinical and pre-launch materials, including fees paid to contract manufacturers; • laboratory and vendor expenses related to the execution of discovery programs, preclinical and clinical trials; • employee-related expenses, which include salaries, benefits and stock-based compensation; and • facilities and other expenses, which include allocated expenses for rent and maintenance of facilities, depreciation and amortization expense, information technology and other supplies.
As a result, we believe the fair value of these agreements is minimal. Critical Accounting Policies, Significant Judgments and Use of Estimates Our management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with United States generally accepted accounting principles (U.S. 98 GAAP).
As a result, we believe the fair value of these agreements is minimal. Critical Accounting Policies, Significant Judgments and Use of Estimates Our management’s discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been prepared in accordance with United States generally accepted accounting principles (U.S. GAAP).
The timing and amount of our future funding requirements depends on many factors, including: • the scope, progress, results and costs of researching and developing our product candidates and programs, and of conducting preclinical studies and clinical trials; • the cost of manufacturing our current and future product candidates for clinical trials in preparation for marketing approval and in preparation for commercialization; • the timing of, and the costs involved in, obtaining marketing approvals for our product candidates if clinical trials are successful; • the cost of commercialization activities for any of our product candidates, whether alone or in collaboration, including marketing, sales and distribution costs if any product candidate is approved for sale; • our ability to establish and maintain strategic licenses or other arrangements and the financial terms of such agreements; • the costs involved in preparing, filing, prosecuting, maintaining, expanding, defending and enforcing patent claims, including litigation costs and the outcome of such litigation; 96 • the timing, receipt and amount of sales of, profit share or royalties on, our future products, if any; • the emergence of competing cancer therapies or other adverse market developments; and • any plans to acquire or in-license other programs or technologies.
The timing and amount of our future funding requirements depends on many factors, including: • the scope, progress, results and costs of researching and developing our product candidates and programs, and of conducting preclinical studies and clinical trials; • the cost of manufacturing our current and future product candidates for clinical trials in preparation for marketing approval and in preparation for commercialization; • the timing of, and the costs involved in, obtaining marketing approvals for our product candidates if clinical trials are successful; • the cost of commercialization activities for our product candidates, whether alone or in collaboration, including marketing, sales and distribution costs if any product candidate is approved for sale; • our ability to establish and maintain strategic licenses or other arrangements and the financial terms of such agreements; • the costs involved in preparing, filing, prosecuting, maintaining, expanding, defending and enforcing patent claims, including litigation costs and the outcome of such litigation; • the timing, receipt and amount of sales of, profit share or royalties on, our product candidates, if approved; • the emergence of competing cancer therapies or other adverse market developments; and • any plans to acquire or in-license other programs or technologies.
Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
Our estimates are based on our historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making 86 judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.
In August 2024, we terminated the 2021 ATM and entered into a new sales agreement with TD Cowen to sell shares of our common stock, from time to time, with aggregate gross proceeds of up to $500 million, through an at-the-market equity offering program (the 2024 ATM).
In August 2024, we terminated the 2021 ATM and entered into a new sales agreement with TD Cowen to sell shares of our common stock, from time 83 to time, with aggregate gross proceeds of up to $500 million, through an at-the-market equity offering program (the 2024 ATM).
Contractual Obligations and Commitments We have contractual obligations related to our office and laboratory space lease in Redwood City, California, described in “Note 7. Commitments and contingencies” in the “Notes to Consolidated Financial Statements” contained in Part II, Item 8 of this Annual Report on Form 10-K.
Contractual Obligations and Commitments We have contractual obligations related to our office and laboratory space lease in Redwood City, California, described in “Note 8. Commitments and contingencies” in the “Notes to Consolidated Financial Statements” contained in Part II, Item 8 of this Annual Report on Form 10-K.
Elironrasib is designed to be differentiated from 90 first-generation KRAS(OFF) G12C inhibitors, which sequester the KRAS(OFF) G12C form, by its mechanism of directly inhibiting the RAS(ON) G12C form.
Elironrasib is designed to be differentiated from first-generation KRAS(OFF) G12C inhibitors, which sequester the KRAS(OFF) G12C form, by its mechanism of directly inhibiting the RAS(ON) G12C form.
We expect our expenses to continue to increase in connection with our ongoing activities, particularly as we continue to advance our product candidates into later stages of development, which includes conducting larger clinical trials, and increase our efforts of preparing to become a commercial-stage company.
We expect our expenses to continue to increase in connection with our ongoing activities, particularly as we continue to advance our product candidates into later stages of development, which includes conducting larger clinical trials, and increasing our efforts to prepare to become a commercial-stage company.
In March 2023, we issued 15,681,818 shares of our common stock in an underwritten public offering at a price to the public of $22.00 per share, for net proceeds of $323.7 million, after deducting underwriting discounts and commissions of $20.7 million and expenses of $0.6 million.
In March 2023, we issued 15,681,818 shares of our common stock in an underwritten public offering at a price to the public of $22.00 per share, for net proceeds of $323.7 million, after deducting underwriting discounts and commissions of $20.7 million and expenses of $0.6 million. In November 2023, we completed the acquisition (the EQRx Acquisition) of EQRx Inc.
Facilities costs consist of rent, utilities and maintenance of facilities. We expect our general and administrative expenses to increase for the foreseeable future due to anticipated increases in operating and commercial preparation activities, which may result in increases in personnel-related costs associated with increased headcount, other administrative and professional services, and related overhead needed to support these efforts.
We expect our general and administrative expenses to increase for the foreseeable future due to anticipated increases in operating and commercial preparation activities, which may result in increases in personnel-related costs associated with increased headcount, other administrative and professional services, and related overhead needed to support these efforts.
In November 2023, we completed the EQRx Acquisition and issued 54,786,528 shares of common stock in the transaction in which we received approximately $1.1 billion in net cash, cash equivalents and marketable securities after deducting EQRx wind-down and transition costs.
(EQRx) and issued 54,786,528 shares of common stock in the transaction in which we received $1.1 billion in net cash, cash equivalents and marketable securities after deducting EQRx wind-down and transition costs.
We will require substantial additional financing for our development efforts for our current and future programs and to prepare for their potential commercialization.
We will require additional funds for our development efforts for our current and future programs and to prepare for their potential commercialization.
The grant date fair value of an RSU award is based on our stock price on the date of grant. For options, we estimate the grant date fair value, and the resulting stock-based compensation, using the Black-Scholes option-pricing model, and we use the straight-line method for expense attribution.
The grant date fair value of an RSU award is based on our stock price on the date of grant. For options, we estimate the grant date fair value, and the resulting stock-based compensation, using the Black-Scholes option-pricing model, and we use the straight-line method for expense attribution. For additional information about measurements of stock-based compensation see “Note 13.
The change in operating assets and liabilities was primarily due to a $9.7 million increase in prepaid expenses and other current assets, a $5.9 million increase in other noncurrent assets, a $6.5 million decrease in accounts payable, offset by a $22.0 million increase in accrued expenses and other current liabilities primarily related to clinical trial and clinical supply manufacturing expenses and increased personnel related expenses due to increased headcount and a $1.3 million decrease in accounts receivable.
The change in operating assets and liabilities was primarily due to a $112.3 million increase in accrued expenses and other current liabilities primarily related to clinical trial and clinical supply manufacturing expenses and increased personnel related expenses due to increased headcount and a $9.5 million increase in accounts payable, offset by a $9.7 million increase in prepaid expenses and other current assets, a $12.9 million increase in other noncurrent assets, a $12.0 million increase in long-term deposits and a $1.0 million decrease in operating lease liability.
It is designed to exhibit picomolar potency for suppressing RAS pathway signaling and growth of KRAS G13C-bearing cancer cells and is engineered to covalently inactivate KRAS G13C for irreversible inhibition. Clinical development of RMC-8839 is subject to our continuing assessment of our portfolio priorities.
Clinical development of RMC-0708 is subject to our continuing assessment of portfolio priorities. RMC-8839 RMC-8839 is designed as a RAS(ON) oral G13C-selective tri-complex inhibitor. It is designed to exhibit picomolar potency for suppressing RAS pathway signaling and growth of KRAS G13C-bearing cancer cells and is engineered to covalently inactivate KRAS G13C for irreversible inhibition.
Recent Accounting Pronouncements For a description of the expected impact of recent accounting pronouncements, see “Note 2. Summary of significant accounting policies” in the “Notes to Consolidated Financial Statements” contained in Part II, Item 8 of this Annual Report on Form 10-K.
Stock-based compensation” in the “Notes to the Consolidated Financial Statements contained in Part II, Item 8 of this Annual Report on Form 10-K. Recent Accounting Pronouncements For a description of the expected impact of recent accounting pronouncements, see “Note 2.
It is designed to exhibit picomolar potency for suppressing RAS pathway signaling and growth of RAS Q61H-bearing cancer cells and is engineered for selective inhibition of RAS Q61H over other RAS isoforms via non-covalent binding interactions. Clinical development of RMC-0708 is subject to our continuing assessment of our portfolio priorities. RMC-8839 RMC-8839 is designed as a RAS(ON) oral G13C-selective inhibitor.
Other Development Opportunities RMC-0708 RMC-0708 is designed as a RAS(ON) oral Q61H-selective tri-complex inhibitor. It is designed to exhibit picomolar potency for suppressing RAS pathway signaling and growth of RAS Q61H-bearing cancer cells and is engineered for selective inhibition of RAS Q61H over other RAS isoforms via non-covalent binding interactions.
(Aethon) pursuant to which Aethon is conducting research related to use of novel bispecific antibodies to mount an immune attack directed at the cancer cells targeted by our RAS(ON) Inhibitors (the Aethon Collaboration Agreement).
Aethon Collaboration In March 2024, we entered into a collaboration agreement with Aethon Therapeutics, Inc. (Aethon) pursuant to which Aethon is conducting research related to use of novel bispecific antibodies to mount an immune attack directed at the cancer cells targeted by our RAS(ON) Inhibitors (the Aethon Collaboration Agreement).
General and administrative expenses General and administrative expenses increased by $21.7 million, or 29%, during the year ended December 31, 2024 compared to 2023.
General and administrative expenses General and administrative expenses increased by $97.7 million, or 100%, during the year ended December 31, 2025 compared to 2024.
Each pre-funded warrant will be exercisable from the date of issuance until fully exercised, subject to an ownership limitation. Total net proceeds from the offering were $823.0 million, after deducting underwriting discounts and commissions of $38.8 million and expenses of $0.6 million.
Each pre-funded warrant is exercisable from the date of issuance until fully exercised, subject to an ownership limitation. Total net proceeds from the offering were $823.0 million, after deducting underwriting discounts and commissions of $38.8 million and expenses of $0.6 million. As of December 31, 2025, all of the pre-funded warrants have been converted to equity.
It is designed to exhibit picomolar potency for suppressing RAS pathway signaling and growth of RAS G12V-bearing cancer cells and is engineered for selective inhibition of RAS G12V over other RAS isoforms via non-covalent binding interactions.
It is designed to exhibit picomolar potency for suppressing RAS pathway signaling and growth of RAS G12V-bearing cancer cells and is engineered for selective inhibition of RAS G12V over other RAS isoforms via non-covalent binding interactions. A first-in-human dose escalation clinical trial of RMC-5127 is ongoing.
During the year ended December 31, 2023, cash used in investing activities of $342.6 million was primarily comprised of purchases of marketable securities of $1.1 billion and purchases of property and equipment of $7.7 million, offset by cash provided by maturities of marketable securities of $724.0 million.
Cash provided by (used in) investing activities During the year ended December 31, 2025, cash provided by investing activities of $118.1 million was primarily comprised of cash provided by maturities of marketable securities of $1.9 billion and sale of marketable securities of $6.4 million, offset by purchases of marketable securities of $1.8 billion and purchases of property and equipment of $16.0 million.
From November 2021 to August 2024, we sold an aggregate of 6,502,078 shares of our common stock under the 2021 ATM, resulting in gross proceeds to us of $186.0 million. During the year ended December 31, 2024, we sold an aggregate of 1,294,050 shares of common stock under the 2021 ATM, resulting in gross proceeds of $60.8 million.
During the year ended December 31, 2024, we sold an aggregate of 1,294,050 shares of common stock under the 2021 ATM, resulting in gross proceeds of $60.8 million.
Through December 31, 2024, we have sold an aggregate of 1,147,893 shares of common stock under the 2024 ATM, resulting in gross proceeds of $60.4 million.
During the year ended December 31, 2024, we sold an aggregate of 1,147,893 shares of common stock under the 2024 ATM, resulting in gross proceeds of $60.4 million. During the year ended December 31, 2025, we sold an aggregate of 6,163,501 shares of common stock under the 2024 ATM, resulting in gross proceeds of $353.4 million.
The non-cash charges primarily consisted of stock-based compensation expense of $79.2 million, depreciation and amortization of $7.6 million, amortization of operating lease right-of-use asset of $4.2 million, offset by net amortization of premium on marketable securities of $44.6 million and change in the fair value of warrant liability and contingent earn-out shares of $4.3 million.
The non-cash charges primarily consisted of stock-based compensation expense of $118.4 million, a $24.2 million non-cash interest expense on liability related to sale of future royalties, change in the fair value of warrant liability and contingent earn-out shares of $15.4 million, depreciation and amortization of $8.7 million, and amortization of operating lease right-of-use asset of $7.9 million, offset by net amortization of premium on marketable securities of $27.8 million.
We do not have any committed external source of funds or other support for these activities, and we expect to finance our cash needs through a combination of public or private equity offerings, debt financings, credit or loan facilities, acquisitions, collaborations, strategic alliances, licensing arrangements and other marketing or distribution arrangements.
Other than the Royalty Purchase Agreement and the Term Loan Facility (which provide for additional funding subject to certain terms and conditions and trigger events), we do not have any committed external source of funds or other support for these activities, and we may finance our cash needs through additional funding under the Royalty Purchase Agreement, the Term Loan Facility and/or a combination of public or private equity offerings, debt financings, other credit or loan facilities, acquisitions, collaborations, strategic alliances, licensing arrangements and other marketing or distribution arrangements.
As of December 31, 2024, we had an accumulated deficit of $1.7 billion. Our primary use of cash is to fund operating expenses, which consist primarily of research and development expenditures related to our product candidates and our pre-clinical research portfolio, and to a lesser extent, general and administrative expenditures.
Our primary use of cash is to fund operating expenses, which consist primarily of research and development expenditures related to our product candidates and our pre-clinical research portfolio, and to a lesser extent, general and administrative and commercial preparation expenditures.
We believe that the accounting policies discussed below are critical to understanding our historical and future performance, as these policies relate to the more significant areas involving management’s judgments and estimates. Revenue recognition We recognize revenue in accordance with Accounting Standards Codification Topic 606, Revenue from Contracts with Customers (ASC 606).
We believe that the accounting policies discussed below are critical to understanding our historical and future performance, as these policies relate to the more significant areas involving management’s judgments and estimates.
Interest income Interest income increased by $38.3 million for the year ended December 31, 2023, compared to 2022 due to a larger cash, cash equivalents and marketable securities balance and higher interest rates. 95 Liquidity and Capital Resources In November 2021, we entered into a sales agreement with Cowen and Company, LLC, an affiliate of TD Securities (USA) LLC (TD Cowen), as amended in March 2024, to sell shares of our common stock, from time to time, with aggregate gross proceeds of up to $250 million, through an at-the-market equity offering program (the 2021 ATM).
Liquidity and Capital Resources In November 2021, we entered into a sales agreement with TD Securities (USA) LLC (f/k/a Cowen and Company LLC) (TD Cowen), as amended in March 2024, to sell shares of our common stock, from time to time, with aggregate gross proceeds of up to $250 million, through an at-the-market equity offering program (the 2021 ATM).
Interest income Interest income primarily consists of interest earned on and accretion of our cash equivalents and marketable securities.
Interest income Interest income primarily consists of interest earned on and accretion of our cash equivalents and marketable securities. Interest expense Interest expense consists of non-cash interest expense associated with the sale of future royalties.
During the year ended December 31, 2022, cash provided by financing activities of $301.4 million was comprised of $248.1 million in net proceeds from the July 2022 underwritten public offering, $49.9 million in net proceeds from the issuance of common stock under the 2021 ATM, $1.9 million in proceeds from the issuance of common stock under the employee stock purchase plan and $1.5 million in proceeds from the issuance of common stock upon the exercise of stock options.
Cash provided by financing activities During the year ended December 31, 2025, cash provided by financing activities of $621.5 million was primarily comprised of $347.9 million in net proceeds from the issuance of common stock under the 2024 ATM, $244.2 million in net proceeds from the sale of future royalties, $21.1 million in proceeds from the issuance of common stock upon the exercise of stock options and $8.0 million in proceeds from the issuance of common stock under the employee stock purchase plan.
The increase in general and administrative expenses during the year ended December 31, 2023 was primarily due to a $14.6 million increase in stock-based compensation expense including $7.5 million in connection with the EQRx Acquisition; a $7.1 million increase in salaries and other employee-related expenses due to increased headcount; a $6.1 million increase in employee-related expenses in connection with the EQRx Acquisition; a $3.2 million increase in facilities and other allocated expenses as a result of higher rent, utilities and information technology expenses associated with increased headcount; a $2.3 million increase in legal and accounting fees; and a $1.6 million increase in pre-commercial development expenses.
The increase was primarily due to a $34.4 million increase in commercial preparation expenses; a $28.6 million increase in salaries and other employee-related expenses due to increased headcount; a $11.8 million increase in stock-based compensation expense; a $10.2 million increase in legal and accounting fees; a $8.2 million increase in facilities and other allocated expenses as a result of higher rent, utilities and information technology expenses associated with increased headcount; and a $2.9 million increase in other professional expenses.
Cash Flows The following table summarizes our consolidated cash flows for the periods indicated: Year Ended December 31, 2024 2023 2022 (in thousands) Net cash provided by (used in): Operating activities $ (557,436 ) $ (350,572 ) $ (224,401 ) Investing activities (554,394 ) (342,598 ) (24,116 ) Financing activities 959,413 1,229,200 301,432 Net change in cash and cash equivalents $ (152,417 ) $ 536,030 $ 52,915 Cash used in operating activities During the year ended December 31, 2024, cash used in operating activities of $557.4 million was attributable to a net loss of $600.1 million, partially offset by $42.3 million in non-cash charges and by a net change of $0.4 million in our operating assets and liabilities.
Cash Flows The following table summarizes our consolidated cash flows for the periods indicated: Year Ended December 31, 2025 2024 (in thousands) Net cash provided by (used in): Operating activities $ (897,741 ) $ (557,436 ) Investing activities 118,058 (554,394 ) Financing activities 621,524 959,413 Net change in cash and cash equivalents $ (158,159 ) $ (152,417 ) 85 Cash used in operating activities During the year ended December 31, 2025, cash used in operating activities of $897.7 million was attributable to a net loss of $1.1 billion, partially offset by $146.7 million in non-cash charges and by a net change of $86.8 million in our operating assets and liabilities.
We are advancing a deep pipeline of RAS(ON) Inhibitors, including daraxonrasib (RMC-6236), our RAS(ON) multi-selective inhibitor; elironrasib (RMC-6291), our G12C-selective inhibitor; and zoldonrasib (RMC-9805), our G12D-selective inhibitor. Together, we consider these three clinical-stage candidates as the first wave of RAS(ON) inhibitors that we are advancing through clinical development. We also currently plan to advance RMC-5127 (G12V) into clinical development.
RAS(ON) Inhibitors We are advancing a deep pipeline of RAS(ON) Inhibitors, including daraxonrasib (RMC-6236), our multi-selective inhibitor, zoldonrasib (RMC-9805), our G12D-selective inhibitor, elironrasib (RMC-6291), our G12C-selective inhibitor, and RMC-5127, our G12V-selective inhibitor.
The cumulative effect of revisions to estimated costs to fulfill our performance obligations will be recorded in the period in which changes are identified and amounts can be reasonably estimated. Accrued research and development expenses We accrue for estimated costs of research and development activities performed by third-party service providers, which include pre-clinical studies, clinical trials and contract manufacturing activities.
Accrued research and development expenses We accrue for estimated costs of research and development activities performed by third-party service providers, which include pre-clinical studies, clinical trials and contract manufacturing activities.
In addition, we have other preclinical-stage RAS(ON) inhibitor clinical development opportunities, including the RAS(ON) mutant-selective inhibitors RMC-0708 (Q61H) and RMC-8839 (G13C). Daraxonrasib (RMC-6236) Daraxonrasib (RMC-6236), our RAS(ON) multi-selective inhibitor, is designed as an oral, RAS-selective tri-complex inhibitor of multiple RAS(ON) variants containing cancer driver mutations at all three of the major RAS mutation hotspot positions (G12, G13 and Q61).
Daraxonrasib Daraxonrasib, our RAS(ON) multi-selective inhibitor, is designed as an oral, RAS-selective tri-complex inhibitor of multiple RAS(ON) variants containing cancer driver mutations at all three of the major RAS mutation hotspot positions, G12, G13, and Q61. Daraxonrasib inhibits all three major RAS isoforms, suppressing the mutant cancer driver and cooperating wild-type RAS proteins. In October 2025, the U.S.
The increase in research and development expenses during the year ended December 31, 2024 was primarily due to a $61.0 million increase in daraxonrasib expenses, primarily attributable to higher clinical trial expenses; a $31.8 million increase in salaries and other employee-related expenses due to increased headcount to support our research and development programs; a $23.5 million increase in zoldonrasib expenses, primarily attributable to higher clinical trial expenses; a $22.4 million increase in elironrasib expenses, primarily attributable to higher clinical trial expenses; a $16.8 million increase in stock-based compensation; a $14.9 million increase in other research and development expenses as a result of higher rent, utilities and information technology expenses associated with increased headcount; and a $7.9 million increase in preclinical research portfolio expenses; partially offset by a $9.3 million decrease in other RAS companion inhibitor program expenses.
The increase was primarily due to higher clinical trial and manufacturing expenses, including a $162.1 million increase related to daraxonrasib expenses, a $56.1 million increase related to zoldonrasib expenses and a $18.6 million increase related to elironrasib expenses; a $75.6 million increase in salaries and other employee-related expenses due to increased headcount to support our research and development programs; a $29.1 million increase in other research and development expenses as a result of higher rent, utilities and information technology expenses associated with increased headcount; a $27.4 million increase in stock-based compensation; and a $19.8 million increase in preclinical research portfolio expenses.
Acquisition” in the “Notes to Consolidated Financial Statements” contained in Part II, Item 8 of this Annual Report on Form 10-K. Aethon Collaboration In March 2024, we entered into a collaboration agreement with Aethon Therapeutics, Inc.
Summary of significant accounting policies” in the “Notes to Consolidated Financial Statements” contained in Part II, Item 8 of this Annual Report on Form 10-K.
Guided by our understanding of genetic drivers and adaptive resistance mechanisms in cancer, we deploy precision medicine approaches to inform innovative monotherapy and combination regimens.
Guided by our understanding of genetic drivers and adaptive resistance mechanisms in cancer, we deploy precision medicine approaches to inform innovative monotherapy and combination regimens. Our research and development pipeline comprises inhibitors that bind directly to RAS variants (RAS(ON) Inhibitors) that are designed to be used as monotherapy, in combination with other RAS(ON) Inhibitors and/or other therapeutic agents.
As a result, we are unable to determine the duration and completion costs of our research and development projects or clinical trials or if and to what extent we will generate revenue from the commercialization and sale of any of our product candidates, if approved.
As a result, we are unable to determine the duration and completion costs of our research and development projects or clinical trials or if and to what extent we will generate revenue from the commercialization and sale of any of our product candidates, if approved. 81 General and administrative expenses General and administrative expenses consist primarily of personnel-related costs, consultants and professional services expenses, including legal, audit, accounting and human resources services, insurance, commercial preparation activities, allocated facilities and information technology costs, and other general operating expenses not otherwise classified as research and development expenses.
The following table sets forth the components of our research and development expenses for the periods indicated: Years Ended December 31, 2024 2023 Increase/ (decrease) (in thousands) Third-party research and development expenses: Clinical Development Programs: Daraxonrasib (RMC-6236) $ 168,911 $ 107,947 $ 60,964 Elironrasib (RMC-6291) 55,034 32,593 22,441 Zoldonrasib (RMC-9805) 64,112 40,657 23,455 RAS companion inhibitors 6,955 16,252 (9,297 ) Preclinical programs 73,089 65,156 7,933 Total third-party research and development expenses 368,101 262,605 105,496 Salaries and other employee-related expenses 113,475 81,658 31,817 Stock-based compensation expense 50,973 34,126 16,847 Amortization of intangible assets 1,069 1,068 1 Other research and development costs 58,607 43,687 14,920 Total research and development expense $ 592,225 $ 423,144 $ 169,081 Research and development expenses increased by $169.1 million, or 40%, during the year ended December 31, 2024 compared to 2023.
The following table sets forth the components of our research and development expenses for the periods indicated: 82 Years Ended December 31, 2025 2024 Increase/ (decrease) (in thousands) Third-party research and development expenses: Clinical Development Programs: Daraxonrasib (RMC-6236) $ 330,982 $ 168,911 $ 162,071 Zoldonrasib (RMC-9805) 120,193 64,112 56,081 Elironrasib (RMC-6291) 73,671 55,034 18,637 RMC-5127 12,824 — 12,824 RAS companion inhibitors 746 6,955 (6,209 ) Preclinical programs 92,875 73,089 19,786 Total third-party research and development expenses 631,291 368,101 263,190 Salaries and other employee-related expenses 189,064 113,475 75,589 Stock-based compensation expense 78,356 50,973 27,383 Amortization of intangible assets 870 1,069 (199 ) Other research and development costs 87,751 58,607 29,144 Total research and development expense $ 987,332 $ 592,225 $ 395,107 Research and development expenses increased by $395.1 million, or 67%, during the year ended December 31, 2025 compared to 2024.
Having finalized the study protocol, we are now activating sites for a global, randomized Phase 3 registrational trial comparing daraxonrasib versus docetaxel in patients with locally advanced or metastatic RAS-mutated non-small cell lung cancer (NSCLC) who have been treated with immunotherapy and platinum-containing chemotherapy, which we call the RASolve 301 study.
Based on encouraging early-stage clinical results we are evaluating daraxonrasib in RASolve 301, a global, randomized Phase 3 registrational trial comparing daraxonrasib versus docetaxel in patients with locally advanced or metastatic RAS mutant NSCLC who have been treated with immunotherapy and platinum-containing chemotherapy. We currently expect to substantially complete enrollment in RASolve 301 in 2026.
Our operations have been financed primarily by our public offerings of common stock, the EQRx Acquisition and $188.7 million received under the Sanofi Agreement from June 2018 through June 2023 for upfront payments and for research and development cost reimbursement. As of December 31, 2024, we had $2.3 billion in cash, cash equivalents and marketable securities.
To date, our operations have been financed primarily by our public offerings of common stock, the EQRx Acquisition and the sale of future royalties. As of December 31, 2025, we had $2.0 billion in cash, cash equivalents and marketable securities. 84 As of December 31, 2025, we had an accumulated deficit of $2.9 billion.
We currently expect to initiate a global, randomized Phase 3 daraxonrasib monotherapy study in patients with first-line (1L) metastatic PDAC in the second half of 2025. We also currently expect to initiate a global, randomized Phase 3 monotherapy study of daraxonrasib as adjuvant treatment for patients with resectable PDAC in the second half of 2025.
We also currently expect to initiate RASolve 308, a global, randomized placebo-controlled Phase 3 registrational trial evaluating zoldonrasib in combination with standard of care in patients with 1L metastatic RAS G12D NSCLC in the first half of 2026. We currently expect to provide an update on our plans for advancing daraxonrasib combination therapy in 1L NSCLC in 2026.