Biggest changeThe loss on change in fair value of the contingent consideration during the years ended December 31, 2023 and 2022 was due primarily to fluctuations in foreign currency exchange rates impacting future revenue projections of ICLUSIG and the passage of time.
Biggest changeThe loss on change in fair value of the contingent consideration during the years ended December 31, 2024 and 2023 was due primarily to fluctuations in foreign currency exchange rates impacting future revenue projections of ICLUSIG and the passage of time. 75 Table of Contents Profit sharing from co-commercialization activities Under the former collaboration and license agreement with MorphoSys, which was executed in March 2020 and continued through February 5, 2024 as described further in Note 5 of the Notes to the Consolidated Financial Statements, we and MorphoSys were both responsible for the commercialization efforts of tafasitamab in the United States and shared equally the profits and losses from the co-commercialization efforts.
During 2023, net cash used in investing activities was $207.7 million, which represents purchases of marketable securities of $456.0 million, payments for intangible assets of $15.0 million, capital expenditures of $32.5 million, and purchases of long term investments of $10.0 million, offset in part by the sale and maturity of marketable securities of $305.8 million.
During 2023, net cash used in investing activities was $207.7 million, which represents purchases of marketable securities of $456.0 million, capital expenditures of $32.5 million, payments for intangible assets of $15.0 million, and purchases of long term investments of $10.0 million, offset in part by the sale and maturity of marketable securities of $305.8 million. Cash used in financing activities.
We recognize revenues for product received by our customers net of allowances for customer credits, including estimated rebates, chargebacks, discounts, returns, distribution service fees, patient assistance programs, and government rebates, such as the Medicaid Drug Rebate Program and Medicare Part D coverage gap reimbursements in the United States.
We recognize revenues for product received by our customers net of allowances for customer credits, including estimated rebates, chargebacks, discounts, returns, distribution service fees, patient assistance programs, and government rebates, such as the Medicaid Drug Rebate Program and Medicare Part D coverage gap reimbursements in the United States and mandated discounts in Europe.
Salary and benefits related expense increased from 2022 to 2023 due primarily to increased development headcount to sustain our development pipeline. Stock compensation expense may fluctuate from period to period based on the number of awards granted, stock price volatility and expected award lives, as well as expected award forfeiture rates which are used to value equity-based compensation.
Salary and benefits related expense increased from 2023 to 2024 due primarily to increased headcount to sustain our development pipeline. Stock compensation expense may fluctuate from period to period based on the number of awards granted, stock price volatility and expected award lives, as well as expected award forfeiture rates which are used to value equity-based compensation.
A discussion of our financial performance for the year ended December 31, 2023 as compared to the year ended December 31, 2022 appears below under the captions “Results of Operations” and “Liquidity and Capital Resources.” A discussion of our financial performance for the year ended December 31, 2022 compared to the year ended December 31, 2021 can be found under the same captions in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2022, filed with the SEC on February 7, 2023, which is available free of charge on the SEC’s website at www.sec.gov and our Investor Relations website at investor.incyte.com/financial-information/annual-reports .
A discussion of our financial performance for the year ended December 31, 2024 as compared to the year ended December 31, 2023 appears below under the captions “Results of Operations” and “Liquidity and Capital Resources.” A discussion of our financial performance for the year ended December 31, 2023 compared to the year ended December 31, 2022 can be found under the same captions in Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2023, filed with the SEC on February 13, 2024, which is available free of charge on the SEC’s website at www.sec.gov and our Investor Relations website at investor.incyte.com/financial-information/annual-reports .
The stock compensation process requires significant judgment and the use of estimates, particularly surrounding Black-Scholes assumptions such as stock price volatility over the option term and expected option lives, as well as expected forfeiture rates and the probability of PSUs vesting.
The stock compensation process requires the use of estimates, particularly surrounding Black-Scholes assumptions such as stock price volatility over the option term and expected option lives, as well as expected forfeiture rates and the probability of PSUs vesting.
If actual future rebates vary from estimates, we may need to adjust prior period accruals, which would affect revenue in the period of adjustment. Chargebacks: Chargebacks are discounts that occur when certain indirect contracted customers purchase directly from our wholesalers at a discounted price.
If actual future rebates vary from estimates, we may need to adjust prior period accruals, which would affect revenue in the period of adjustment. 69 Table of Contents Chargebacks: Chargebacks are discounts that occur when certain indirect contracted customers purchase directly from our wholesalers at a discounted price.
Any interest and penalties on uncertain tax positions are included within the tax provision. 70 Table of Contents We record estimates and prepare and file tax returns in various jurisdictions across the United States, Canada, Europe, and Asia based upon our interpretation of local tax laws and regulations.
Any interest and penalties on uncertain tax positions are included within the tax provision. We record estimates and prepare and file tax returns in various jurisdictions across the United States, Canada, Europe, and Asia based upon our interpretation of local tax laws and regulations.
For the year ended December 31, 2023 and 2022, our 50% share of the costs for tafasitamab was $2.0 million and $8.0 million, respectively, as recorded in (profit) and loss sharing under collaboration agreements on the consolidated statement of operations.
For the year ended December 31, 2023, our 50% share of the costs for tafasitamab was $2.0 million, as recorded in (profit) and loss sharing under collaboration agreements on the consolidated statement of operations.
During 2023, net cash used in financing activities was $20.0 million, and in 2022, net cash used in financing activities was $0.8 million, respectively, consisting primarily of cash paid to ARIAD/Takeda for contingent consideration, offset in part by proceeds from the issuance of common stock under our stock plans net of tax withholdings.
During 2023, net cash used in financing activities was $20.0 million, consisting primarily of cash paid to ARIAD/Takeda for contingent consideration, offset in part by proceeds from the issuance of common stock under our stock plans net of tax withholdings.
At December 31, 2023, we had available cash, cash equivalents and marketable securities of $3.7 billion. Our cash and marketable securities balances are held in a variety of interest-bearing instruments, including money market accounts and U.S. government debt securities. Available cash is invested in accordance with our investment policy’s primary objectives of liquidity, safety of principal and diversity of investments.
At December 31, 2024, we had available cash, cash equivalents and marketable securities of $2.2 billion. Our cash and marketable securities balances are held in a variety of interest-bearing instruments, including money market accounts and U.S. government debt securities. Available cash is invested in accordance with our investment policy’s primary objectives of liquidity, safety of principal and diversity of investments.
For the years ending December 31, 2023 and 2022, our Black-Scholes assumptions included a weighted-average stock price volatility of 32% in 2023 and 36% in 2022, average expected option life of approximately five years and an estimated annualized forfeiture rate of 5%.
For the years ending December 31, 2024 and 2023, our Black-Scholes assumptions included a weighted-average stock price volatility of 30% in 2024 and 32% in 2023, average expected option life of approximately five years and an estimated annualized forfeiture rate of 5%.
As of December 31, 2023, we have accrued approximately $59.5 million within accrued and other current liabilities on the consolidated balance sheet, relating to the incremental rebates that would be owed were OPZELURA considered a line extension of JAKAFI. The impact on OPZELURA gross to net deductions for the quarter ending December 31, 2023, is approximately 6.5%.
As of December 31, 2024, we have accrued approximately $127.6 million within accrued and other current liabilities on the consolidated balance sheet, relating to the incremental rebates that would be owed were OPZELURA considered a line extension of JAKAFI. The impact on OPZELURA gross to net deductions for the quarter ending December 31, 2024, is approximately 6.3%.
Increases in certain government reimbursement rates are limited to a measure of inflation, and when the price of a drug increases faster than this measure of inflation it will result in a penalty adjustment factor that causes a larger sales allowance to those government related entities.
Increases in certain U.S. government reimbursement rates are limited to a measure of inflation, and when the price of a drug increases faster than this measure of inflation it will result in a penalty adjustment factor th at causes a larger sales allowance to those government related entities.
Product royalty revenues on commercial sales of PEMAZYRE by Innovent are based on net sales of licensed products in licensed territories as provided by Innovent. 72 Table of Contents Our milestone and contract revenues were $7.0 million and $165.0 million for the years ended December 31, 2023 and 2022, respectively.
Product royalty revenues on commercial sales of PEMAZYRE by Innovent are based on net sales of licensed products in licensed territories as provided by Innovent. 73 Table of Contents Our milestone and contract revenues were $43.0 million and $7.0 million for the years ended December 31, 2024 and 2023, respectively.
The change in fair value of the acquisition-related contingent consideration for the years ended December 31, 2023 and 2022 was expense of $29.2 million and $12.1 million, respectively, which is recorded in loss on change in fair value of acquisition-related contingent consideration on the consolidated statements of operations.
The change in fair value of the acquisition-related contingent consideration for the years ended December 31, 2024 and 2023 was expense of $19.8 million and $29.2 million, respectively, which is recorded in loss on change in fair value of acquisition-related contingent consideration on the consolidated statements of operations.
Cost of Product Revenues For the Year Ended December 31, 2023 2022 (in millions) Product costs $ 89.2 $ 57.1 Salary and benefits related 11.9 9.5 Stock compensation 3.1 2.7 Royalty expense 128.2 116.2 Amortization of definite-lived intangible assets 22.6 21.5 Total cost of product revenues $ 255.0 $ 207.0 Cost of product revenues includes all product related costs, reserves for obsolescence, employee personnel costs, including stock compensation, for those employees dedicated to the production of our commercial products, royalties owed under our collaborative agreements and amortization of our licensed intellectual property rights for ICLUSIG and the amortization of capitalized milestone payments.
Cost of Product Revenues For the Year Ended December 31, 2024 2023 (in millions) Product costs $ 129.0 $ 89.2 Salary and benefits related 16.2 11.9 Stock compensation 2.3 3.1 Royalty expense 141.0 128.2 Amortization of definite-lived intangible assets 23.6 22.6 Total cost of product revenues $ 312.1 $ 255.0 Cost of product revenues includes all product related costs, reserves for obsolescence, employee personnel costs, including stock compensation, for those employees dedicated to the production of our commercial products, royalties owed under our collaborative agreements and amortization of our licensed intellectual property rights for ICLUSIG and the amortization of capitalized milestone payments.
Cash provided by operating activities. The decrease in cash provided by operating activities from 2022 to 2023 was due primarily to changes in working capital. 75 Table of Contents Cash used in investing activities. Our investing activities, other than purchases, sales and maturities of marketable securities, have consisted predominantly of capital expenditures and purchases of long term investments.
Cash provided by operating activities. The decrease in cash provided by operating activities from 2023 to 2024 was due primarily to the Escient acquisition and changes in working capital. Cash used in investing activities. Our investing activities, other than purchases, sales and maturities of marketable securities, have consisted predominantly of capital expenditures and sales of long term investments.
The average risk-free interest rate assumption used in the Black-Scholes valuations increased from 2.14% in 2022 to 4.01% in 2023. The fair value of stock options, which are subject to graded vesting, are recognized as compensation expense over the requisite service period using the accelerated attribution method.
The average risk-free interest rate assumption used in the Black-Scholes valuations increased from 4.01% in 2023 to 4.15% in 2024. 70 Table of Contents The fair value of stock options, which are subject to graded vesting, are recognized as compensation expense over the requisite service period using the accelerated attribution method.
As of December 31, 2023, we had no outstanding borrowings and were in compliance with all covenants under this facility. The amendment to the credit facility is discussed further in Note 16 of Notes to the Consolidated Financial Statements.
As of December 31, 2024, we had no outstanding borrowings and were in compliance with all covenants under this facility. The Credit Agreement is described further in Note 16 of Notes to the Consolidated Financial Statements.
Our effective tax rates for 2023 and 2022 were higher than the U.S. statutory rate primarily due to foreign losses with no associated tax benefit (i.e., full valuation allowance) and an increase in our valuation allowance against certain U.S. federal and state deferred tax assets.
Our effective tax rate for 2023 was higher than the U.S. statutory rate primarily due to foreign losses with no associated tax benefit and an increase in our valuation allowance against certain U.S. federal and state deferred tax assets.
Our capital expenditures for construction activities and our non-operating contractual operating and finance lease obligations are discussed in Note 8 of Notes to the Consolidated Financial Statements. In August 2021, we entered into a $500.0 million, three-year senior unsecured revolving credit facility, which was subsequently amended in May 2023.
Our capital expenditures for construction activities and our non-operating contractual operating and finance lease obligations are discussed in Note 8 of Notes to the Consolidated Financial Statements. 77 Table of Contents In August 2021, we entered into a $500.0 million, senior unsecured revolving credit facility, which was subsequently amended in May 2023 and June 2024 (as amended, the “Credit Agreement”).
As of December 31, 2023, a 5% change in our sales allowance and accruals would have had an approximate $64.3 million impact on our income before taxes. 68 Table of Contents Customer Credits: Our customers are offered various forms of consideration, including allowances, service fees and prompt payment discounts.
As of December 31, 2024, a 5% change in our sales allowance and accruals would have had an approximate $79.9 million impact on our income before taxes. Customer Credits: Our customers are offered various forms of consideration, including allowances, service fees and prompt payment discounts.
We also assess collectability based primarily on the customer’s payment history and on the creditworthiness of the customer. Product Revenues Our product revenues consist of sales of JAKAFI, OPZELURA, ICLUSIG, PEMAZYRE, MINJUVI, and ZYNYZ. Product revenues are recognized once we satisfy the performance obligation at a point in time under the revenue recognition criteria as described above.
We also assess collectability based primarily on the customer’s payment history and on the creditworthiness of the customer. Product Revenues Product revenues are recognized once we satisfy the performance obligation at a point in time under the revenue recognition criteria as described above.
Share-based payment transactions with employees, which include stock options, restricted stock units (RSUs) and performance shares (PSUs), are recognized as compensation expense over the requisite service period based on their estimated fair values at the date of grant as well as expected forfeiture rates based on actual experience.
Share-based payment transactions with employees, which include stock options, restricted stock units (RSUs) and performance shares (PSUs), are recognized as compensation expense over the requisite service period based on their estimated fair values at the date of grant as well as expected forfeiture rates based on actual experience, subject to customary retirement provisions that may accelerate the requisite service period for expense recognition purposes.
We also conduct clinical development and commercial operations from our European headquarters in Morges, Switzerland and our other offices across Europe, as well as our Japanese office in Tokyo and our Canadian headquarters in Montreal.
Our global headquarters is located in Wilmington, Delaware, where we conduct discovery, clinical development and commercial operations. We also conduct clinical development and commercial operations from our European headquarters in Morges, Switzerland and our other offices across Europe, as well as our Japanese office in Tokyo and our Canadian headquarters in Montreal.
Unrealized gains and losses on long term investments will fluctuate from period to period, based on the change in fair value of the securities we hold in our publicly held collaboration partners.
Realized and unrealized gain (loss) on equity investments Realized and unrealized gains and losses on equity investments will fluctuate from period to period, based on sales of securities and the change in fair value of the securities we hold in our publicly held collaboration partners.
As a result of releasing the valuation allowance on the majority of our U.S. deferred tax assets in 2021, we expect that our reported income tax expense (current plus deferred) for future periods will be higher than that recorded for prior periods.
Given we do not record a valuation allowance on the majority of our U.S. deferred tax assets, we expect that our reported income tax expense (current plus deferred) for future periods will be higher than that recorded for prior periods.
We expect our sales allowances to fluctuate from quarter to quarter as a result of the Medicare Part D Coverage Gap, the volume of purchases eligible for government mandated discounts and rebates as well as changes in discount percentages which are impacted by potential future price increases, rate of inflation, and other factors.
We expect our sales allowances to fluctuate from quarter to quarter due to changes in the volume of purchases eligible for government mandated discounts and rebates as well as changes in discount percentages, which are impacted by potential future price increases, rate of inflation, and other factors, such as changes to the 340B drug pricing program.
Rebates are generally invoiced and paid in arrears so that the accrual balance consists of an estimate of the amount expected to be incurred for the current quarter’s activity, plus an accrual balance for known prior quarters’ unpaid rebates.
Our estimates for expected utilization of commercial insurance rebates are based on data received from our customers. Rebates are generally invoiced and paid in arrears so that the accrual balance consists of an estimate of the amount expected to be incurred for the current quarter’s activity, plus an accrual balance for known prior quarters’ unpaid rebates.
Results of Operations Years Ended December 31, 2023 and 2022 We recorded net income for the years ended December 31, 2023 and 2022 of $597.6 million and $340.7 million, respectively. On a per share basis, basic net income was $2.67 and diluted net income was $2.65 for the year ended December 31, 2023.
Results of Operations Years Ended December 31, 2024 and 2023 We recorded net income for the years ended December 31, 2024 and 2023 of $32.6 million and $597.6 million, respectively. On a per share basis, basic net income was $0.16 and diluted net income was $0.15 for the year ended December 31, 2024.
Liquidity and Capital Resources 2023 2022 (in millions) December 31: Cash, cash equivalents, and marketable securities $ 3,656.0 $ 3,239.0 Working capital $ 3,405.0 $ 2,935.8 Year ended December 31: Cash provided by (used in): Operating activities $ 496.5 $ 969.9 Investing activities $ (207.7) $ (78.5) Financing activities $ (20.0) $ (0.8) Capital expenditures (included in investing activities above) $ (32.5) $ (77.8) Sources and Uses of Cash.
Liquidity and Capital Resources 2024 2023 (in millions) December 31: Cash, cash equivalents, and marketable securities $ 2,158.1 $ 3,656.0 Working capital $ 1,597.2 $ 3,405.0 Year ended December 31: Cash provided by (used in): Operating activities $ 335.3 $ 496.5 Investing activities $ 157.5 $ (207.7) Financing activities $ (2,021.5) $ (20.0) Capital expenditures (included in investing activities above) $ (86.3) $ (32.5) Sources and Uses of Cash.
Our portfolio focuses on areas of high unmet medical need and includes compounds in various stages, ranging from preclinical to late stage development, and commercialized products JAKAFI (ruxolitinib), ICLUSIG (ponatinib), PEMAZYRE (pemigatinib) and OPZELURA (ruxolitinib) cream, as well as MINJUVI (tafasitamab) and MONJUVI (tafasitamab-cxix), which prior to our February 2024 acquisition of global rights to tafasitamab, were co-commercialized, and ZYNYZ (retifanlimab-dlwr).
Our portfolio focuses on areas of high unmet medical need and includes compounds in various stages, ranging from preclinical to late-stage development, and commercialized products JAKAFI (ruxolitinib), ICLUSIG (ponatinib), PEMAZYRE (pemigatinib), OPZELURA (ruxolitinib cream), MINJUVI (tafasitamab), MONJUVI (tafasitamab-cxix) and ZYNYZ (retifanlimab-dlwr), as well as NIKTIMVO (axatilimab-csfr), which was approved for medical use in the United States in August 2024 and will be co-commercialized.
Selling, general and administrative expenses For the Year Ended December 31, 2023 2022 (in millions) Salary and benefits related $ 300.1 $ 269.1 Stock compensation 86.1 73.2 Other contract services and outside costs 775.1 659.8 Total selling, general and administrative expenses $ 1,161.3 $ 1,002.1 Salary and benefits related expense increased from 2022 to 2023 due primarily to increased headcount.
Selling, general and administrative expenses For the Year Ended December 31, 2024 2023 (in millions) Salary and benefits related $ 349.6 $ 300.1 Stock compensation 102.5 86.1 Escient acquisition related compensation expense 20.2 — Other contract services and outside costs 769.9 775.1 Total selling, general and administrative expenses $ 1,242.2 $ 1,161.3 Salary and benefits related expense increased from 2023 to 2024 due primarily to increased headcount.
Our product revenues may fluctuate from period to period due to our customers’ purchasing patterns over the course of a year, including as a result of increased inventory building by customers in advance of expected or announced price increases. Product revenues are recorded net of sales allowances.
Refer to Note 5 of Notes to the Consolidated Financial Statements for further information related to the acquisition. Our product revenues may fluctuate from period to period due to our customers’ purchasing patterns over the course of a year, including as a result of increased inventory building by customers in advance of expected or announced price increases.
Operating Expenses Research and development expenses For the Year Ended December 31, 2023 2022 (in millions) Salary and benefits related $ 399.1 $ 345.6 Stock compensation 126.7 112.5 Clinical research and outside services 936.7 978.9 Occupancy and all other costs 165.1 148.9 Total research and development expenses $ 1,627.6 $ 1,585.9 We account for research and development costs by natural expense line and not costs by project.
Operating Expenses Research and development expenses For the Year Ended December 31, 2024 2023 (in millions) Salary and benefits related $ 505.9 $ 399.1 Stock compensation 161.3 126.7 Escient acquisition related compensation expense 11.3 — Escient IPR&D expense 679.4 — Clinical research and outside services 1,074.7 936.7 Occupancy and all other costs 174.2 165.1 Total research and development expenses $ 2,606.8 $ 1,627.6 We account for research and development costs by natural expense line and not costs by project.
Research and development expenses for the years ended December 31, 2023 and 2022 were net of $49.1 million and $52.2 million, respectively, of costs reimbursed by our collaborative partners. 73 Table of Contents In addition to one-time expenses resulting from upfront fees in connection with the entry into any new or amended collaboration agreements and payment of milestones under those agreements, research and development expenses may fluctuate from period to period depending upon the stage of certain projects and the level of pre-clinical and clinical trial related activities.
In addition to one-time expenses resulting from upfront fees in connection with the entry into any new or amended collaboration agreements and payment of milestones under those agreements, research and development expenses may fluctuate from period to period depending upon the stage of certain projects and the level of pre-clinical and clinical trial related activities.
If actual royalties vary from estimates, we may need to adjust the prior period, which would affect royalty revenue and receivable in the period of adjustment.
We exercise judgment in determining whether the information provided is sufficiently reliable for us to base our royalty revenue recognition thereon. If actual royalties vary from estimates, we may need to adjust the prior period, which would affect royalty revenue and receivable in the period of adjustment.
License Agreements, Business Relationships and Acquisitions We establish business relationships, including collaborative arrangements with other companies and medical research institutions to assist in the clinical development and/or commercialization of certain of our drugs and drug candidates and to provide support for our research programs.
See Part I, Item 1A of this report, “Risk Factors” for a further discussion of certain factors that could impact our future product revenues. 68 Table of Contents License Agreements, Business Relationships and Acquisitions We establish business relationships, including collaborative arrangements with other companies and medical research institutions to assist in the clinical development and/or commercialization of certain of our drugs and drug candidates and to provide support for our research programs.
Historically, adjustments to these estimates to reflect actual royalty revenues have not been material to our financial results and have been less than 1% of royalty revenues. 69 Table of Contents Milestone and Contract Revenues At the inception of a contract, we determine the transaction price, in addition to any upfront payment, by estimating the amount of variable consideration, including milestone payments, at the outset of the contract utilizing the most likely amount method.
Milestone and Contract Revenues At the inception of a contract, we determine the transaction price, in addition to any upfront payment, by estimating the amount of variable consideration, including milestone payments, at the outset of the contract utilizing the most likely amount method.
Revenues For the Year Ended, December 31, 2023 2022 (in millions) JAKAFI revenues, net $ 2,593.7 $ 2,409.2 OPZELURA revenues, net 337.9 128.7 ICLUSIG revenues, net 111.6 105.8 PEMAZYRE revenues, net 83.6 83.5 MINJUVI revenues, net 37.1 19.7 ZYNYZ revenues, net 1.3 — Total product revenues, net 3,165.2 2,746.9 JAKAVI product royalty revenues 367.6 331.6 OLUMIANT product royalty revenues 136.1 134.5 TABRECTA product royalty revenues 17.8 15.4 PEMAZYRE product royalty revenues 1.9 1.2 Total product royalty revenues 523.4 482.7 Milestone and contract revenues 7.0 165.0 Total revenues $ 3,695.6 $ 3,394.6 The increase in JAKAFI product revenues from 2022 to 2023 was comprised of a volume increase of $135.3 million and a price increase of $49.2 million.
On a per share basis, basic net income was $2.67 and diluted net income was $2.65 for the year ended December 31, 2023. 71 Table of Contents Revenues For the Year Ended, December 31, 2024 2023 (in millions) JAKAFI revenues, net $ 2,792.1 $ 2,593.7 OPZELURA revenues, net 508.3 337.9 ICLUSIG revenues, net 114.3 111.6 PEMAZYRE revenues, net 81.7 83.6 MINJUVI/MONJUVI revenues, net 119.3 37.1 ZYNYZ revenues, net 3.2 1.3 Total product revenues, net 3,618.9 3,165.2 JAKAVI product royalty revenues 418.8 367.6 OLUMIANT product royalty revenues 135.6 136.1 TABRECTA product royalty revenues 22.7 17.8 PEMAZYRE product royalty revenues 2.2 1.9 Total product royalty revenues 579.3 523.4 Milestone and contract revenues 43.0 7.0 Total revenues $ 4,241.2 $ 3,695.6 The increase in JAKAFI product revenues from 2023 to 2024 was comprised of a volume increase of $142.3 million and a price increase of $56.1 million.
Research and development expenses include upfront and milestone expenses related to our collaborative agreements and the asset acquisition of Villaris in 2022, which were $36.7 million and $126.0 million for the years ended December 31, 2023 and 2022, respectively.
Research and development expenses include upfront and milestone expenses related to our collaborative agreements, which were $104.4 million and $36.7 million for the years ended December 31, 2024 and 2023, respectively. Research and development expenses for the years ended December 31, 2024 and 2023 were net of $29.9 million and $49.1 million, respectively, of costs reimbursed by our collaborative partners.
Royalty revenues on commercial sales for PEMAZYRE by Innovent are estimated based on information provided by Innovent. We recognize royalty revenues in the period the sales occur. We exercise judgment in determining whether the information provided is sufficiently reliable for us to base our royalty revenue recognition thereon.
Royalty revenues on commercial sales for OLUMIANT by Lilly are estimated based on information provided by Lilly. Royalty revenues on commercial sales for PEMAZYRE by Innovent are estimated based on information provided by Innovent. We recognize royalty revenues in the period the sales occur.
During the year ended December 31, 2022, our milestone and contract revenues were derived from total regulatory milestones achieved of $135.0 million, in addition to a $30.0 million upfront payment received upon our transfer of functional intellectual property to one of our collaboration partners.
During the year ended December 31, 2024, our milestone and contract revenues were derived from a $25.0 million upfront payment received during the first quarter of 2024 upon our transfer of functional intellectual property to China Medical Systems Holdings Limited, and we recognized $18.0 million of upfront and milestone payments from two of our collaboration partners during the third quarter of 2024.
Cost of product revenues increased from 2022 to 2023 due primarily to growth in net product revenues and inventory reserves for obsolescence.
The increase in cost of product revenues from 2023 to 2024 was primarily due to growth in net product revenues, increased royalty expense and increased manufacturing related costs.
The following table provides a summary of those unrealized gains and (losses): For the Years Ended, December 31, 2023 2022 (in millions) Agenus $ (18.9) $ (9.9) Calithera (0.2) (0.9) Merus 45.2 (58.0) MorphoSys 22.9 (21.2) Syndax (5.5) 5.1 Syros 0.4 (2.7) Total unrealized gain (loss) on long term investments $ 43.9 $ (87.6) Provision for income taxes.
The following table provides a summary of those realized and unrealized gains and (losses): For the Years Ended, December 31, 2024 2023 (in millions) Agenus $ (8.2) $ (18.9) Merus 106.1 45.2 MorphoSys 30.7 22.9 Syndax (11.9) (5.5) Other (0.7) 0.2 Total realized and unrealized gain on equity investments $ 116.0 $ 43.9 During the year ended December 31, 2024, we sold all remaining investments in Agenus Inc., Merus and MorphoSys AG as described further in in Note 7 of the Notes to the Consolidated Financial Statements.
Interest income and other, net, for the years ended December 31, 2023 and 2022 was $172.3 million and $39.9 million, respectively.
Non-operating Income and Expenses Interest income Interest income for the years ended December 31, 2024 and 2023 was $128.7 million and $158.4 million, respectively.
During 2022, net cash used in investing activities was $78.5 million, which represents purchases of marketable securities of $79.9 million, capital expenditures of $77.8 million, offset in part by the sale and maturity of marketable securities of $79.2 million. Cash used in financing activities.
During 2024, net cash provided by investing activities was $157.5 million, which primarily represented sales of equity investments of $284.8 million and sale and maturity of marketable securities of $231.3 million, offset in part by purchases of marketable securities of $258.4 million, payments for intangible assets of $13.9 million, and capital expenditures of $86.3 million.
We accrue a liability for co-payment assistance based on actual program participation and estimates of program redemption using data provided by third-party administrators. During the fourth quarter of 2021 and fiscal year 2022, we also offered a full buy-down program to non-covered patients of OPZELURA as we were obtaining commercial insurance coverage for OPZELURA.
We accrue a liability for co-payment assistance based on actual program participation and estimates of program redemption using data provided by third-party administrators. Product Royalty Revenues Royalty revenues on commercial sales for JAKAVI and TABRECTA by Novartis are estimated based on information provided by Novartis.
The decrease in clinical research and outside services expense from 2022 to 2023 was primarily due to a decrease in one-time collaboration related expenses. The increase in total research and development expense from 2022 to 2023 was primarily due to continued investment in our late stage development assets.
Research and development expenses for the year ended December 31, 2024 also include the $679.4 million of expense related to the acquired in-process research and development assets as part of the Escient acquisition. 74 Table of Contents The increase in clinical research and outside services expense from 2023 to 2024 was primarily due to continued investment in our late-stage development assets, additional expenses resulting from the Escient acquisition and timing of certain expenses.
(Profit) and loss sharing under collaboration agreements Under the now terminated collaboration and license agreement with MorphoSys, which was executed in March 2020, we and MorphoSys were both responsible for the commercialization efforts of tafasitamab in the United States and will share equally the profits and losses from the co-commercialization efforts.
Under the collaboration agreement with Syndax, as described further in Note 7 of the Notes to the Consolidated Financial Statements, we and Syndax are both responsible for the co-commercialization of axatilimab in the United States and share equally in the profits and losses from those efforts.
The other therapeutic area is Inflammation and Autoimmunity (IAI), which includes our Dermatology commercial franchise. We are also eligible to receive milestones and royalties on molecules discovered by us and licensed to third parties. Our global headquarters is located in Wilmington, Delaware, where we conduct discovery, clinical development and commercial operations.
We are also eligible to receive milestones and royalties on molecules discovered by us and licensed to third parties.
Our revenue recognition policies require estimates of the aforementioned sales allowances each period. 71 Table of Contents The following table provides a summary of activity with respect to our sales allowances and accruals (in thousands): Year Ended December 31, 2023 Discounts and Distribution Fees Government Rebates and Chargebacks Co-Pay Assistance and Other Discounts Product Returns Total Balance at January 1, 2023 $ 25,316 $ 148,465 $ 25,580 $ 6,366 $ 205,727 Allowances for current period sales 132,062 994,597 136,745 11,986 1,275,390 Allowances for prior period sales (729) 5,338 3,314 3,033 10,956 Credits/payments for current period sales (114,055) (811,357) (135,550) — (1,060,962) Credits/payments for prior period sales (22,115) (95,108) (17,073) (10,364) (144,660) Balance at December 31, 2023 $ 20,479 $ 241,935 $ 13,016 $ 11,021 $ 286,451 Government rebates and chargebacks are the most significant component of our sales allowances.
Our revenue recognition policies require estimates of the aforementioned sales allowances each period. 72 Table of Contents The following table provides a summary of activity with respect to our sales allowances and accruals (in thousands): Year Ended December 31, 2024 Discounts and Distribution Fees Government Rebates and Chargebacks Co-Pay Assistance and Other Discounts Product Returns Total Balance at January 1, 2024 $ 20,479 $ 264,422 $ 13,016 $ 11,021 $ 308,938 Allowances for current period sales 152,167 1,282,224 131,979 23,251 1,589,621 Allowances for prior period sales 429 2,718 (68) 4,386 7,465 Credits/payments for current period sales (129,777) (1,049,069) (127,400) (238) (1,306,484) Credits/payments for prior period sales (15,858) (117,737) (4,237) (15,407) (153,239) Balance at December 31, 2024 $ 27,440 $ 382,558 $ 13,290 $ 23,013 $ 446,301 U.S. government rebates and chargebacks are the most significant component of our sales allowances.
The increase in OPZELURA net product revenues from 2022 to 2023 was driven by growth in patient demand, refills and expansion in payer coverage as the launch in atopic dermatitis and vitiligo continues.
The increase was driven by continued growth in new patient starts and refills, and approximately $60.7 million of OPZELURA net product revenues for 2024 were from Europe.
Our effective tax rate of 28.4% for the year ended December 31, 2023 decreased as compared to 35.6% for the prior year period primarily due to the dilution of the rate impact of foreign losses with no associated tax benefit, an increase in the tax rate benefits associated with research and development and orphan drug tax credits and a decrease in certain non-deductible expenses.
Provision for income taxes The provision for income taxes for the years ended December 31, 2024 and 2023 was $284.0 million and $236.6 million, respectively. 76 Table of Contents Our effective tax rate of 89.7% for the year ended December 31, 2024 increased as compared to 28.4% for the prior year primarily due to non-deductible charges of $710.9 million associated with the Escient acquisition.
The increase in interest income and other, net primarily relates to an increase in interest earned on our cash equivalents and marketable securities generally due to higher interest rates. 74 Table of Contents Unrealized gain (loss) on long term investments.
The decrease in Interest income for the year ended December 31, 2024 primarily relates to a decrease in interest earned on our cash equivalents and marketable securities generally due to lower cash equivalent and marketable securities balance in the second half of 2024 as compared to the corresponding period in 2023.