Biggest changeRESULTS OF OPERATIONS Revenue Revenue is summarized as follows: For the Years Ended December 31, % Change $ Change 2022 vs. 2021 2021 vs. 2020 2022 vs. 2021 2021 vs. 2020 (In millions, except percentages) 2022 2021 2020 Product revenue, net: United States $ 3,469.3 $ 3,805.7 $ 5,900.1 (8.8) % (35.5) % $ (336.4) $ (2,094.4) Rest of world 4,518.5 5,041.2 4,792.1 (10.4) 5.2 (522.7) 249.1 Total product revenue, net 7,987.8 8,846.9 10,692.2 (9.7) (17.3) (859.1) (1,845.3) Revenue from anti-CD20 therapeutic programs 1,700.5 1,658.5 1,977.8 2.5 (16.1) 42.0 (319.3) Other revenue 485.1 476.3 774.6 1.8 (38.5) 8.8 (298.3) Total revenue $ 10,173.4 $ 10,981.7 $ 13,444.6 (7.4) % (18.3) % $ (808.3) $ (2,462.9) 52 Table of Conten ts Product Revenue Product revenue is summarized as follows: For the Years Ended December 31, % Change $ Change 2022 vs. 2021 2021 vs. 2020 2022 vs. 2021 2021 vs. 2020 (In millions, except percentages) 2022 2021 2020 Multiple Sclerosis (MS): TECFIDERA $ 1,443.9 $ 1,951.9 $ 3,841.1 (26.0) % (49.2) % $ (508.0) $ (1,889.2) VUMERITY (1) 553.4 410.4 64.3 34.8 538.3 143.0 346.1 Total Fumarate 1,997.3 2,362.3 3,905.4 (15.5) (39.5) (365.0) (1,543.1) AVONEX 973.5 1,208.7 1,491.9 (19.5) (19.0) (235.2) (283.2) PLEGRIDY 331.9 357.4 385.6 (7.1) (7.3) (25.5) (28.2) Total Interferon 1,305.4 1,566.1 1,877.5 (16.6) (16.6) (260.7) (311.4) TYSABRI 2,030.9 2,063.1 1,946.1 (1.6) 6.0 (32.2) 117.0 FAMPYRA 96.6 105.2 103.1 (8.2) 2.0 (8.6) 2.1 Subtotal: MS 5,430.2 6,096.7 7,832.1 (10.9) (22.2) (666.5) (1,735.4) Spinal Muscular Atrophy: SPINRAZA 1,793.5 1,905.1 2,052.1 (5.9) (7.2) (111.6) (147.0) Biosimilars: BENEPALI 441.0 498.3 481.6 (11.5) 3.5 (57.3) 16.7 IMRALDI 224.5 233.4 216.3 (3.8) 7.9 (8.9) 17.1 FLIXABI 81.3 99.4 97.9 (18.2) 1.5 (18.1) 1.5 BYOOVIZ (2) 4.3 — — nm — 4.3 — Subtotal: Biosimilars 751.1 831.1 795.8 (9.6) 4.4 (80.0) 35.3 Other: FUMADERM 8.2 11.0 12.2 (25.5) (9.8) (2.8) (1.2) ADUHELM 4.8 3.0 — 60.0 nm 1.8 3.0 Total product revenue, net $ 7,987.8 $ 8,846.9 $ 10,692.2 (9.7) % (17.3) % $ (859.1) $ (1,845.3) (1) VUMERITY became commercially available in the E.U. during the fourth quarter of 2021.
Biggest changeRevenue is summarized as follows: For the Years Ended December 31, % Change $ Change 2023 vs. 2022 2022 vs. 2021 2023 vs. 2022 2022 vs. 2021 (In millions, except percentages) 2023 2022 2021 Product revenue, net: United States $ 3,141.4 $ 3,469.3 $ 3,805.7 (9.5) % (8.8) % $ (327.9) $ (336.4) Rest of world 4,105.3 4,518.5 5,041.2 (9.1) (10.4) (413.2) (522.7) Total product revenue, net 7,246.7 7,987.8 8,846.9 (9.3) (9.7) (741.1) (859.1) Revenue from anti-CD20 therapeutic programs 1,689.6 1,700.5 1,658.5 (0.6) 2.5 (10.9) 42.0 Contract manufacturing, royalty and other revenue 899.3 485.1 476.3 85.4 1.8 414.2 8.8 Total revenue $ 9,835.6 $ 10,173.4 $ 10,981.7 (3.3) % (7.4) % $ (337.8) $ (808.3) PRODUCT REVENUE Product revenue is summarized as follows: For the Years Ended December 31, % Change $ Change 2023 vs. 2022 2022 vs. 2021 2023 vs. 2022 2022 vs. 2021 (In millions, except percentages) 2023 2022 2021 Multiple Sclerosis $ 4,661.9 $ 5,430.2 $ 6,096.7 (14.1) % (10.9) % $ (768.3) $ (666.5) Rare disease 1,803.0 1,793.5 1,905.1 0.5 (5.9) 9.5 (111.6) Biosimilars 770.0 751.1 831.1 2.5 (9.6) 18.9 (80.0) Other (1) 11.8 13.0 14.0 (9.2) (7.1) (1.2) (1.0) Total product revenue, net $ 7,246.7 $ 7,987.8 $ 8,846.9 (9.3) % (9.7) % $ (741.1) $ (859.1) (1) Other includes FUMADERM, ADUHELM and ZURZUVAE, which became commercially available in the U.S. during the fourth quarter of 2023. 67 T able of Contents MULTIPLE SCLEROSIS • Global TECFIDERA revenue decreased $431.4 million, from $1,443.9 million in 2022 to $1,012.5 million in 2023, or 29.9%, driven by a decrease in demand as a result of multiple TECFIDERA generic entrants in North America, Brazil and certain E.U. countries. • Global Interferon revenue decreased $199.7 million, from $1,305.4 million in 2022 to $1,105.7 million in 2023, or 15.3%, driven by a decrease in sales volumes as patients transition to higher efficacy therapies. • Global VUMERITY revenue increased $22.9 million, from $553.4 million in 2022 to $576.3 million in 2023, or 4.1%, primarily due to an increase in global demand, partially offset by higher discounts and allowances in the U.S. driven by a favorable Medicaid-related sales adjustment in the first quarter of 2022. • Global TYSABRI revenue decreased $154.0 million, from $2,030.9 million in 2022 to $1,876.9 million in 2023, or 7.6%, primarily due to a decrease in U.S.
For the year ended December 31, 2022, amortization and impairment of acquired intangible assets reflects the impact of a $119.6 million impairment charge related to vixotrigi ne for the potential treatment of DPN.
For the year ended December 31, 2022 , amortization and impairment of acquired intangible assets reflects the impact of a $119.6 million impairment charge related to vixotrigi ne (BIIB074) for the potential treatment of DPN.
Other (Income) Expense, Net For 2022 compared to 2021, the change in other (income) expense, net primarily reflects a pre-tax gain during 2022 of approximately $1.5 billion related to the sale of our 49.9% equity interest in Samsung Bioepis, partially offset by a pre-tax charge of $900.0 million, plus settlement fees and expenses, related to a litigation settlement agreement to resolve a qui tam litigation relating to conduct prior to 2015.
OTHER (INCOME) EXPENSE, NET For 2023 compared to 2022, the change in other (income) expense, net primarily reflects a pre-tax gain recorded during 2022 of approximately $1.5 billion related to the sale of our 49.9% equity interest in Samsung Bioepis, partially offset by a pre-tax charge recorded during 2022 of approximately $900.0 million, plus settlement fees and expenses, related to a litigation settlement agreement to resolve a qui tam litigation relating to conduct prior to 2015.
Royalty Revenue on Sales of OCREVUS For 2022 compared to 2021, the increase in royalty revenue on sales of OCREVUS was primarily due to sales growth of OCREVUS in the U.S. OCREVUS royalty revenue is based on our estimates from third party and market research data of OCREVUS sales occurring during the corresponding period.
ROYALTY REVENUE ON SALES OF OCREVUS For 2023 compared to 2022, the increase in royalty revenue on sales of OCREVUS was primarily due to sales growth of OCREVUS in the U.S. OCREVUS royalty revenue is based on our estimates from third party and market research data of OCREVUS sales occurring during the corresponding period.
For additional information on our collaboration arrangements with Samsung Bioepis, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in this report. Noncontrolling Interests, Net of Tax Our consolidated financial statements include the financial results of our variable interest entity, Neurimmune, as we determined that we are the primary beneficiary.
For additional information on our collaboration arrangements with Samsung Bioepis, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in this report. NONCONTROLLING INTERESTS, NET OF TAX Our consolidated financial statements include the financial results of a variable interest entity, Neurimmune, as we determined that we were the primary beneficiary.
Beginning January 1, 2023, Eisai receives only a tiered royalty based on net sales of ADUHELM, and will no longer share global profits and losses. For the years ended December 31, 2022 and 2021, we recognized net profit-sharing expense of $217.4 million and $285.4 million, respectively, to reflect Samsung Bioepis’ 50.0% sharing of the net collaboration profits.
Beginning January 1, 2023, Eisai receives only a tiered royalty based on net sales of ADUHELM, and will no longer share global profits and losses. For the years ended December 31, 2023 and 2022, we recognized net profit-sharing expense of $223.5 million and $217.4 million, respectively, to reflect Samsung Bioepis' 50.0% sharing of the net collaboration profits.
Simultaneously, with the close of this transaction we leased back the building for a term of approximately 5.5 years, which resulted in the recognition of approximately $168.2 million in new lease liabilities and right-of-use assets recorded within our consolidated balance sheets as of December 31, 2022.
Simultaneously, with the close of this transaction we leased back the building for a term of approximately 5.5 years, which resulted in the recognition of approximately $168.2 million in a new lease liability and right-of-use asset recorded within our consolidated balance sheets as of December 31, 2022.
Contractual Adjustments Contractual adjustments primarily relate to Medicaid and managed care rebates in the U.S., pharmacy rebates, co-payment (copay) assistance, Veterans Administration, 340B discounts, specialty pharmacy program fees and other government rebates or applicable allowances.
CONTRACTUAL ADJUSTMENTS Contractual adjustments primarily relate to Medicaid and managed care rebates in the U.S., pharmacy rebates, co-payment (copay) assistance, VA, 340B discounts, specialty pharmacy program fees and other government rebates or applicable allowances.
These savings are being achieved through a number of initiatives, including reductions to our workforce, the substantial elimination of our commercial ADUHELM infrastructure, the consolidation of certain real estate locations and operating efficiency gains across our selling, general and administrative and research and development functions.
These savings are being achieved through a number of initiatives, including reductions to our workforce, the substantial elimination of our commercial ADUHELM infrastructure, deprioritization of certain research and development programs, the consolidation of certain real estate locations and operating efficiencies across our selling, general and administrative and research and development functions.
Milestone and Upfront Expense Research and development expense for 2022 includes: • $37.0 million in charges to research and development expense in connection with milestone payments to Ionis; • $15.0 million charge to research and development expense in connection with the upfront payment associated with entering into our collaboration with Alectos in the second quarter of 2022; and • $10.0 million charge to research and development expense in connection with the upfront payment associated with entering into 61 Table of Conten ts our collaboration with Alcyone in the fourth quarter of 2022.
Research and development expense for 2022 includes: • $37.0 million in charges to research and development expense in connection with milestone payments to Ionis; • $15.0 million charge to research and development expense in connection with the upfront payment associated with entering into our collaboration with Alectos Therapeutics Inc. in the second quarter of 2022; and • $10.0 million charge to research and development expense in connection with the upfront payment associated with entering into our collaboration with Alcyone Therapeutics in the fourth quarter of 2022.
For additional information on our collaboration agreement with Neurimmune, please read Note 20, Investments in Variable Interest Entities, to our consolidated financial statements included in this report.
For additional information on the valuation allowance, deconsolidation and our collaboration agreement with Neurimmune, please read Note 20, Investments in Variable Interest Entities, to our consolidated financial statements included in this report.
We expect additional guidance and regulations to be issued in future periods and will continue to assess its potential impact on our business and results of operations as further information becomes available. The IRA also contains substantial drug pricing reforms that may have a significant impact on the pharmaceutical industry in the U.S.
We will continue to assess its potential impact on our business and results of operations as further information becomes available. The IRA also contains substantial drug pricing reforms that may have a significant impact on the pharmaceutical industry in the U.S.
For the years ended December 31, 2022 and 2021 we recognized net reductions to our operating expense of approximately $224.7 million and $233.2 million, respectively, to reflect Eisai's 45.0% share of net collaboration losses in the U.S.
For the year ended December 31, 2022, we recognized net reductions to our operating expense of approximately $224.7 million to reflect Eisai's 45.0% share of net collaboration losses in the U.S. for ADUHELM.
We have also recognized approximately $197.0 million and $99.0 million related to Eisai's 45.0% share of inventory, idle capacity charges and contractual commitments, which was recorded in collaboration profit (loss) sharing within our consolidated statements of income for the years ended December 31, 2022 and 2021, respectively.
We also recognized approximately $197.0 million related to Eisai's 45.0% share of inventory, idle capacity charges and contractual commitments in collaboration profit sharing/(loss reimbursement) within our consolidated statements of income for the year ended December 31, 2022.
For additional information on our collaboration arrangements with Samsung Bioepis and Eisai, please read Note 19, Collaborative and Other Relationships , to our consolidated financial statements included in this report.
For additional information on our acquisition of Reata, please read Note 2, Acquisitions , to our consolidated financial statements included in this report. For additional information on our collaboration arrangements with Eisai, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in this report.
For additional information on our income taxes, uncertain tax positions and income tax rate reconciliation, please read Note 17, Income Taxes , to our consolidated financial statements included in this report.
For additional information on the litigation settlement agreement, please read Note 18, Other Consolidated Financial Statement Detail , to our consolidated financial statements included in this report. For additional information on our income taxes, uncertain tax positions and income tax rate reconciliation, please read Note 17, Income Taxes , to our consolidated financial statements included in this report.
Biogen’s Share of Pre-tax Profits in the U.S. for RITUXAN and GAZYVA The following table provides a summary of amounts comprising our share of pre-tax profits in the U.S. for RITUXAN and GAZYVA: For the Years Ended December 31, (In millions) 2022 2021 2020 Product revenue, net $ 1,729.2 $ 2,032.0 $ 3,334.1 Cost and expense 253.6 291.8 433.0 Pre-tax profits in the U.S. $ 1,475.6 $ 1,740.2 $ 2,901.1 Biogen's share of pre-tax profits $ 547.0 $ 647.7 $ 1,080.2 For 2022 compared to 2021, the decrease in U.S. product revenue, net was primarily due to a decrease in sales volumes of RITUXAN in the U.S. of 28.4%, primarily due to the onset of competition from multiple biosimilar products.
FOR RITUXAN, GAZYVA AND LUNSUMIO The following table provides a summary of amounts comprising our share of pre-tax profits in the U.S. for RITUXAN, GAZYVA and LUNSUMIO: For the Years Ended December 31, (In millions) 2023 2022 2021 Product revenue, net $ 1,581.3 $ 1,729.2 $ 2,032.0 Cost and expense 419.9 253.6 291.8 Pre-tax profits in the U.S. $ 1,161.4 $ 1,475.6 $ 1,740.2 Biogen's share of pre-tax profits $ 409.4 $ 547.0 $ 647.7 For 2023 compared to 2022, the decrease in U.S. product revenue, net was primarily due to a decrease in sales volumes of RITUXAN in the U.S. of 15.2%, resulting from competition from multiple biosimilar products, partially offset by an increase in sales volumes of GAZYVA of 17.9%.
This sale resulted in a pre-tax gain on sale of approximately $503.7 million, net of transaction costs, for the year ended December 31, 2022.
This sale resulted in a pre-tax gain on sale of approximately $503.7 million, net of transaction costs, which is reflected within gain on sale of building in our consolidated statements of income for the year ended December 31, 2022.
The decrease was partially offset by an increase in costs associated with: • the advancement of litifilimab (BIIB059) for the potential treatment of SLE into late stage; • the advancement of BIIB122 for the potential treatment of Parkinson's disease into late stage; and • the advancement of BIIB800, a proposed tocilizumab biosimilar referencing ACTEMRA, into late stage.
The decrease was partially offset by an increase in costs associated with: • development of litifilimab for the treatment of SLE into late stage; and • development of TOFIDENCE, a tocilizumab biosimilar referencing ACTEMRA.
For additional information on our collaboration arrangements with Genentech, including information regarding the pre-tax profit-sharing formula and its impact on future revenue from anti-CD20 therapeutic programs, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in this report. 57 Table of Conten ts Other Revenue Other revenue consists of royalty revenue and contract manufacturing and other revenue and is summarized as follows: Royalty Revenue and Contract Manufacturing and Other Revenue Contract Manufacturing and Other Revenue We record contract manufacturing and other revenue primarily from amounts earned under contract manufacturing agreements.
For additional information on our collaboration arrangements with Genentech, including information regarding the pre-tax profit-sharing formula and its impact on future revenue from anti-CD20 therapeutic programs, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in this report.
Differences between actual and estimated royalty revenue will be adjusted for in the period in which they become known, which is generally expected to be the following quarter. Other Revenue from Anti-CD20 Therapeutic Programs Other revenue from anti-CD20 therapeutic programs consists of our share of pre-tax co-promotion profits from RITUXAN in Canada.
Differences between actual and estimated royalty revenue will be adjusted for in the period in which they become known, which is generally expected to be the following quarter. BIOGEN'S SHARE OF PRE-TAX PROFITS IN THE US.
The IRA introduced new tax provisions, including a 15.0% corporate alternative minimum tax and a 1.0% excise tax on stock repurchases. The provisions of the IRA will be effective for periods after December 31, 2022.
INFLATION REDUCTION ACT OF 2022 In August 2022 the IRA was signed into law in the U.S. The IRA introduced new tax provisions, including a 15.0% corporate alternative minimum tax and a 1.0% excise tax on stock repurchases. The provisions of the IRA are effective for periods after December 31, 2022.
Excluding upfront payments, we expect our core research and development expense to modestly increase in 2023, as we continue to invest in our pipeline. We intend to continue committing significant resources to targeted research and development opportunities where there is a significant unmet need and where a drug candidate has the potential to be highly differentiated.
We intend to continue committing significant resources to targeted research and development opportunities where there is a significant unmet need and where a drug candidate has the potential to be highly differentiated.
For additional information on the redemption of our Senior Notes, please read Note 13, Indebtedness , to our consolidated financial statements included in this report. 125 Broadway Sale and Leaseback Transaction In September 2022 we completed the sale of our building and land parcel located at 125 Broadway for an aggregate sales price of approximately $603.0 million, which is inclusive of a $10.8 million tenant allowance.
GAIN ON SALE OF BUILDING In September 2022 we completed the sale of our building and land parcel located at 125 Broadway for an aggregate sales price of approximately $603.0 million, which is inclusive of a $10.8 million tenant allowance.
These estimates reflect our historical experience, current contractual and statutory requirements, specific known market events and trends, industry data and forecasted customer buying and payment patterns. Actual amounts may ultimately differ from our estimates. If actual results vary, we adjust these estimates, which could have an effect on earnings in the period of adjustment.
These estimates reflect our historical experience, current contractual and statutory requirements, specific known market events and trends, industry data and forecasted customer buying and payment patterns. Actual amounts may ultimately differ from our estimates.
For additional information on the litigation settlement agreement, please read Note 18, Other Consolidated Financial Statement Detail , to our consolidated financial statements included in this report. For additional information on certain risks that could negatively impact our financial position or future results of operations, please read Item 1A. R isk Factors and
For additional information on our acquisition of Reata, please read Note 2, Acquisitions , to our consolidated financial statements included in this report. 82 T able of Contents For additional information on certain risks that could negatively impact our financial position or future results of operations, please read Item 1A. Risk Factors and
For 2022 compared to 2021, the 9.4% decrease in rest of world SPINRAZA revenue was primarily due to country mix, the unfavorable impact of foreign currency exchange and the timing of shipments, partially offset by an increase in sales volumes.
The increase was partially offset by a decrease in rest of world SPINRAZA revenue primarily due to the unfavorable impact of foreign currency exchange, increased competition, a decrease in pricing and the timing of shipments.
For additional information on the sale of our equity interest in Samsung Bioepis, please read Note 3, Dispositions , to our consolidated financial statements included in this report. For additional information on the redemption of our Senior Notes, please read Note 13, Indebtedness , to our consolidated financial statements included in this report.
For additional information on the sale of our equity interest in Samsung Bioepis, please read Note 3, Dispositions , to our consolidated financial statements included in this report. 80 T able of Contents For additional information on the litigation settlement agreement, please read Note 18, Other Consolidated Financial Statement Detail , to our consolidated financial statements included in this report.
(Gain) Loss on Fair Value Remeasurement of Contingent Consideration For the year ended December 31, 2022, the changes in fair value of our contingent consideration obligations were primarily due to the discontinuation of further development efforts related to vixotrigine for the potential treatment of TGN and DPN, resulting in a reduction of our contingent consideration obligations of approximatel y $195.4 million, and changes in the interest rates used to revalue our contingent consideration liabilities.
For additional information on our collaboration and license arrangements with Samsung Bioepis, Sage and Eisai, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in this report. 78 T able of Contents (GAIN) LOSS ON FAIR VALUE REMEASUREMENT OF CONTINGENT CONSIDERATION For the year ended December 31, 2022, the changes in fair value of our contingent consideration obligations were primarily due to the discontinuation of further development efforts related to vixotrigine for the potential treatment of TGN and DPN, resulting in a reduction of our contingent consideration obligations of approximatel y $195.4 million, reducing the remaining fair value of vixotrigine to zero, as well as changes in the interest rates used to revalue our contingent consideration liabilities.
We may, from time to time, also seek additional funding through a combination of new collaborative agreements, strategic alliances and additional equity and debt financings or from other 71 Table of Conten ts sources should we identify a significant new opportunity .
In addition, we may choose to opportunistically return cash to shareholders and pursue other business initiatives, including acquisition and licensing activities. We may also seek additional funding through a combination of new collaborative agreements, strategic alliances and additional equity and debt financings or from other sources should we identify a significant new opportunity.
Revenue from Anti-CD20 Therapeutic Programs Genentech (Roche Group) Our share of RITUXAN, including RITUXAN HYCELA, and GAZYVA collaboration operating profits in the U.S., royalty revenue on sales of OCREVUS and other revenue from anti-CD20 therapeutic programs are summarized in the table below. For purposes of this discussion, we refer to RITUXAN and RITUXAN HYCELA collectively as RITUXAN.
In February 2023 we announced that we are exploring strategic options for our biosimilars business. 70 T able of Contents REVENUE FROM ANTI-CD20 THERAPEUTIC PROGRAMS Our share of RITUXAN, including RITUXAN HYCELA, GAZYVA and LUNSUMIO collaboration operating profits in the U.S., royalty revenue on sales of OCREVUS and other revenue from anti-CD20 therapeutic programs are summarized in the table below.
Late Stage Programs For 2022 compared to 2021, the decrease in spending associated with our late stage programs was primarily due to a decrease in costs associated with: • the advancement of ADUHELM from late stage to marketed upon the accelerated approval of ADUHELM in the U.S.; and • the discontinuation of BIIB111 in choroideremia.
LATE STAGE PROGRAMS 2023 vs. 2022 The decrease in late stage programs was driven by a decrease in costs associated with: • advancement of LEQEMBI from late stage to marketed upon the accelerated approval of LEQEMBI in the U.S.; • advancement of ZURZUVAE from late stage to marketed upon the approval of ZURZUVAE for PPD in the U.S.; • advancement of QALSODY from late stage to marketed upon the accelerated approval of QALSODY in the U.S.; and • advancement of LUNSUMIO from late stage to marketed upon the accelerated approval of LUNSUMIO in the U.S.
Amortization and Impairment of Acquired Intangible Assets Our amortization expense is based on the economic consumption and impairment of intangible assets. Our most significant amortizable intangible assets are related to our TYSABRI, AVONEX, SPINRAZA, VUMERITY and TECFIDERA (rest of world) products and other programs acquired through business combinations.
AMORTIZATION AND IMPAIRMENT OF ACQUIRED INTANGIBLE ASSETS Our amortization expense is based on the economic consumption and impairment of intangible assets. Our most significant amortizable intangible assets are related to TYSABRI, AVONEX, SPINRAZA, VUMERITY and SKYCLARYS, which was obtained as part of our acquisition of Reata in September 2023.
This amount reflects our share of results prior to the sale of Samsung Bioepis as the results are recognized one quarter in arrears.
This amount reflects our share of results prior to the sale of Samsung Bioepis as the results are recognized one quarter in arrears. For additional information on the sale of our equity interest in Samsung Bioepis, please read Note 3, Dispositions , to our consolidated financial statements included in this report.
We anticipate modest growth in revenue from our biosimilars business in 2023, compared to 2022, driven by the continued launch of BYOOVIZ in the U.S. and rest of world, offset in part by continued price reductions in certain markets.
During the third quarter of 2023 the FDA approved TOFIDENCE, a tocilizumab biosimilar referencing ACTEMRA, which we expect to become commercially available during 2024. In 2024 we anticipate modest growth in revenue from our biosimilars business driven by the continued launch of BYOOVIZ in the U.S. and rest of world, offset in part by lower pricing in certain markets.
Cost and Expense A summary of total cost and expense is as follows: For the Years Ended December 31, % Change $ Change 2022 vs. 2021 2021 vs. 2020 2022 vs. 2021 2021 vs. 2020 (In millions, except percentages) 2022 2021 2020 Cost of sales, excluding amortization and impairment of acquired intangible assets $ 2,278.3 $ 2,109.7 $ 1,805.2 8.0 % 16.9 % $ 168.6 $ 304.5 Research and development 2,231.1 2,501.2 3,990.9 (10.8) (37.3) (270.1) (1,489.7) Selling, general and administrative 2,403.6 2,674.3 2,504.5 (10.1) 6.8 (270.7) 169.8 Amortization and impairment of acquired intangible assets 365.9 881.3 464.8 (58.5) 89.6 (515.4) 416.5 Collaboration profit (loss) sharing (7.4) 7.2 232.9 (202.8) (96.9) (14.6) (225.7) (Gain) loss on divestiture of Hillerød, Denmark manufacturing operations — — (92.5) — nm — 92.5 (Gain) loss on fair value remeasurement of contingent consideration (209.1) (50.7) (86.3) 312.4 (41.3) (158.4) 35.6 Acquired in-process research and development — 18.0 75.0 (100.0) (76.0) (18.0) (57.0) Restructuring charges 131.1 — — nm — 131.1 — Gain on sale of building (503.7) — — nm — (503.7) — Other (income) expense, net (108.2) 1,095.5 (497.4) (109.9) (320.2) (1,203.7) 1,592.9 Total cost and expense $ 6,581.6 $ 9,236.5 $ 8,397.1 (28.7) % 10.0 % $ (2,654.9) $ 839.4 nm Not meaningful 59 Table of Conten ts Cost of Sales, Excluding Amortization and Impairment of Acquired Intangible Assets Cost of sales, as a percentage of total revenue, were 22.4%, 19.2% and 13.4% for the years ended December 31, 2022, 2021 and 2020, respectively.
For additional information on our revenue reserves, please read Note 5, Revenue, to our consolidated financial statements included in this report. 73 T able of Contents COST AND EXPENSE A summary of total cost and expense is as follows: For the Years Ended December 31, % Change $ Change 2023 vs. 2022 2022 vs. 2021 2023 vs. 2022 2022 vs. 2021 (In millions, except percentages) 2023 2022 2021 Cost of sales, excluding amortization and impairment of acquired intangible assets $ 2,533.4 $ 2,278.3 $ 2,109.7 11.2 % 8.0 % $ 255.1 $ 168.6 Research and development 2,462.0 2,231.1 2,501.2 10.3 (10.8) 230.9 (270.1) Selling, general and administrative 2,549.7 2,403.6 2,674.3 6.1 (10.1) 146.1 (270.7) Amortization and impairment of acquired intangible assets 240.6 365.9 881.3 (34.2) (58.5) (125.3) (515.4) Collaboration profit sharing/(loss reimbursement) 218.8 (7.4) 7.2 nm (202.8) 226.2 (14.6) (Gain) loss on fair value remeasurement of contingent consideration — (209.1) (50.7) nm 312.4 209.1 (158.4) Acquired in-process research and development — — 18.0 — nm — (18.0) Restructuring charges 218.8 131.1 — 66.9 nm 87.7 131.1 Gain on sale of building — (503.7) — nm nm 503.7 (503.7) Other (income) expense, net 315.5 (108.2) 1,095.5 (391.6) (109.9) 423.7 (1,203.7) Total cost and expense $ 8,538.8 $ 6,581.6 $ 9,236.5 29.7 % (28.7) % $ 1,957.2 $ (2,654.9) nm Not meaningful COST OF SALES, EXCLUDING AMORTIZATION AND IMPAIRMENT OF ACQUIRED INTANGIBLE ASSETS For the Years Ended December 31, (In millions) 2023 2022 2021 Product $ 1,787.2 $ 1,504.8 $ 1,281.2 Royalty 746.2 773.5 828.5 Total cost of sales $ 2,533.4 $ 2,278.3 $ 2,109.7 Cost of sales, as a percentage of total revenue, were 25.8%, 22.4% and 19.2% for the years ended December 31, 2023, 2022 and 2021, respectively.
Therefore, the same program could be reflected in different development stages in the same year. For several of our programs, the research and development activities are part of our collaborative and other relationships. Our costs reflect our share of the total costs incurred.
These costs are considered other research and development costs in the table above and are not allocated to a specific program or stage. For several of our programs, the research and development activities are part of our collaborative and other relationships. Our costs reflect our share of the total costs incurred.
For 2022 compared to 2021, the decrease in contract manufacturing and other revenue was primarily due to lower contract manufacturing revenue related to the timing of batch releases. Royalty Revenue We receive royalties from net sales on products related to patents that we have out-licensed, as well as royalty revenue on biosimilar products from our collaboration arrangements with Samsung Bioepis.
ROYALTY AND OTHER REVENUE Royalty and other revenue primarily reflects the royalties we receive from net sales on products related to patents that we have out-licensed, as well as royalty revenue on biosimilar products from our license arrangements with Samsung Bioepis and our 50.0% share of LEQEMBI product revenue, net and cost of sales, including royalties, as we are not the principal.
The net unrealized losses recognized during the year ended December 31, 2022, primarily reflect a decrease in the aggregate fair value of our investments in Denali and Sangamo common stock of approximately $278.0 million.
NET (GAINS) LOSSES IN EQUITY SECURITIES For the year ended December 31, 2023, net unrealized and realized losses on our holdings in equity securities were approximately $270.0 million and $5.2 million, respectively, compared to net unrealized losses and realized (gains) losses of approximately $264.7 million and zero, respectively, in 2022. • The net unrealized losses recognized during the year ended December 31, 2023, primarily reflect a decrease in the aggregate fair value of our investments in Sage, Denali, Sangamo and Ionis common stock of approximately $248.5 million. • The net unrealized losses recognized during the year ended December 31, 2022, primarily reflect a decrease in the aggregate fair value of our investments in Denali and Sangamo common stock of approximately $278.0 million, partially offset by an increase in the fair value of Ionis and Sage common stock of approximately $27.3 million.
We expect that biosimilar competition will continue to increase as these products capture additional market share and that this will have a significant adverse impact on our co-promotion profits in the U.S. in future years.
We expect that biosimilar competition will continue to increase as these products capture additional market share and that this will have a significant adverse impact on our co-promotion profits in the U.S. in future years. 71 T able of Contents OTHER REVENUE FROM ANTI-CD20 THERAPEUTIC PROGRAMS Other revenue from anti-CD20 therapeutic programs consists of our share of pre-tax co-promotion profits from RITUXAN in Canada, royalty revenue on sales of LUNSUMIO outside the U.S. and royalty revenue on net sales of COLUMVI in the U.S, which became commercially available during the second quarter of 2023.
For additional information on our income taxes please read Note 17, Income Taxes , to our consolidated financial statements included in this report. 70 Table of Conten ts FINANCIAL CONDITION, LIQUIDITY AND CAPITAL RESOURCES Our financial condition is summarized as follows: As of December 31, (In millions, except percentages) 2022 2021 % Change $ Change Financial assets: Cash and cash equivalents $ 3,419.3 $ 2,261.4 51.2 % $ 1,157.9 Marketable securities — current 1,473.5 1,541.1 (4.4) (67.6) Marketable securities — non-current 705.7 892.0 (20.9) (186.3) Total cash, cash equivalents and marketable securities $ 5,598.5 $ 4,694.5 19.3 % $ 904.0 Borrowings: Current portion of notes payable $ — $ 999.1 nm $ (999.1) Notes payable 6,281.0 6,274.0 0.1 7.0 Total borrowings $ 6,281.0 $ 7,273.1 (13.6) % $ (992.1) Working Capital: Current assets $ 9,791.2 $ 7,856.5 24.6 % $ 1,934.7 Current liabilities (3,272.8) (4,298.2) (23.9) 1,025.4 Total working capital $ 6,518.4 $ 3,558.3 83.2 % $ 2,960.1 nm Not meaningful Overview We have historically financed and expect to continue to fund our operating and capital expenditures primarily through cash flow earned through our operations as well as our existing cash resources.
FINANCIAL CONDITION, LIQUIDITY AND CAPITAL RESOURCES Our financial condition is summarized as follows: As of December 31, (In millions, except percentages) 2023 2022 % Change $ Change Financial assets: Cash and cash equivalents $ 1,049.9 $ 3,419.3 (69.3) % $ (2,369.4) Marketable securities — current — 1,473.5 nm (1,473.5) Marketable securities — non-current — 705.7 nm (705.7) Total cash, cash equivalents and marketable securities $ 1,049.9 $ 5,598.5 (81.2) % $ (4,548.6) Borrowings: Current portion of term loan $ 150.0 $ — nm $ 150.0 Notes payable and term loan 6,788.2 6,281.0 8.1 507.2 Total borrowings $ 6,938.2 $ 6,281.0 10.5 % $ 657.2 Working Capital: Current assets $ 6,859.3 $ 9,791.2 (29.9) % $ (2,931.9) Current liabilities (3,434.3) (3,272.8) 4.9 (161.5) Total working capital $ 3,425.0 $ 6,518.4 (47.5) % $ (3,093.4) nm Not meaningful OVERVIEW We have historically financed and expect to continue to fund our operating and capital expenditures primarily through cash flow earned through our operations, as well as our existing cash resources.
Product Cost of Sales For 2022 compared to 2021, the increase in product cost of sales was primarily due to higher charges in 2022 associated with the write-off of excess ADUHELM inventory and purchase commitments, higher gross idle capacity charges associated with our manufacturing facilities and increased product cost of sales driven by product mix.
PRODUCT COST OF SALES For 2023 compared to 2022, the increase in product cost of sales was primarily due to unfavorable product mix from increased contract manufacturing revenue, MS product mix and higher idle capacity charges, partially offset by a decrease in excess and obsolescence inventory charges in 2023.
This resulted in a gain of approximately $5.3 million, which was recorded within restructuring charges in our consolidated statements of income for the year ended December 31, 2022 . For additional information on our 300 Binney Street lease modification, please read Note 12, Leases , to these consolidated financial statements included in this report.
For additional information on our 300 Binney Street lease modification, please read Note 12, Leases , to these consolidated financial statements. For additional information on our cost saving initiatives, please read Note 4, Restructuring, to our consolidated financial statements included in this report.
For additional information on our collaboration arrangements with Genentech, please read Note 19, Collaborative and Other Relationships , to our consolidated financial statements included in this report.
For the years ended December 31, 2023 and 2022, we recorded approximately $165.2 million and $119.0 million, respectively, of aggregate gross idle capacity charges. For additional information on our collaboration arrangements with Eisai, please read Note 19, Collaborative and Other Relationships , to our consolidated financial statements included in this report.
We expect that Interferon revenue will continue to decline in both the U.S. and rest of world markets in 2023, compared to 2022, as a result of increasing competition from other MS products. TYSABRI For 2022 compared to 2021, U.S.
TYSABRI revenue driven by a decrease in demand, higher discounts and unfavorable channel dynamics. MS revenue includes sales from TECFIDERA, VUMERITY, AVONEX, PLEGRIDY, TYSABRI and FAMPYRA. In 2024 we expect total MS revenue will continue to decline as a result of increasing competition for many of our MS products in both the U.S. and rest of world markets.
Inventory amounts written down as a result of excess, obsolescence or unmarketability totaled $336.2 million, $167.6 million and $26.6 million for the years ended December 31, 2022, 2021 and 2020, respectively.
Write Downs and Other Charges Inventory amounts written down as a result of excess, obsolescence or unmarketability totaled $124.4 million, $336.2 million and $167.6 million for the years ended December 31, 2023, 2022 and 2021, respectively. 74 T able of Contents For the year ended December 31, 2022, we recorded approximately $286.0 million of charges associated with the write-off of ADUHELM inventory and contractual commitments in excess of forecasted demand.
For the year ended December 31, 2022, we recognized approximately $131.1 million of net pre-tax restructuring charges related to our 2022 cost saving initiatives, of which approximately $112.6 million consisted of employee severance costs. Our restructuring reserve is included in accrued expense and other in our consolidated balance sheets.
For the year ended December 31, 2023, we recognized approximately $30.4 million of net pre-tax restructuring charges related to employee severance costs. 2022 COST SAVING INITIATIVES In December 2021 and May 2022 we announced our plans to implement a series of cost-reduction measures during 2022.
We believe generic competition for TECFIDERA in the U.S. and other key markets and the impact of biosimilar competition on RITUXAN sales volumes will continue to reduce our cash flow from operations in 2023 and will have a significant adverse impact on our future cash flow from operations.
We believe that generic and biosimilar competition for many of our key products, the continued overall decline of our MS business and our investments in the launch of key new products and the development of our pipeline will have a significant adverse impact on our future cash flow from operations.
For 2022 compared to 2021, the decrease in amortization and impairment of acquired intangible assets was primarily due to higher impairment charges in 2021 of approximately $629.3 million, compared to impairment charges of approximately $119.6 million in 2022.
For additional information on our acquisition of Reata, please read Note 2, Acquisitions , to our consolidated financial statements included in this report. For 2023 compared to 2022, the decrease i n amortization and impairment of acquired intangible assets was primarily due to higher impairment charges in 2022 of approximately $119.6 million, compared to no impairment charges in 2023.
For the year ended December 31, 2021, we also recognized net reductions to our operating expense of $45.0 million to reflect Eisai's 45.0% share of the $100.0 million milestone payment made to Neurimmune related to the launch of ADUHELM in the U.S. during the second quarter of 2021.
For the year ended December 31, 2023, we recognized net reductions to our operating expense of approximately $4.7 million to reflect Sage's 50.0% share of net collaboration losses in the U.S.
For 2023 compared to 2022, we anticipate a decrease in net interest expense as a result of lower average debt balances in 2023 and an increase in 67 Table of Conten ts interest income driven by higher interest rates on our cash and marketable securities.
For 2024 compared to 2023, we anticipate an increase in net interest expense as a result of lower cash balances leading to lower interest income due to the funding of our acquisition of Reata.
Biosimilars BENEPALI, IMRALDI, FLIXABI and BYOOVIZ During the third quarter of 2021 BYOOVIZ, a ranibizumab biosimilar referencing LUCENTIS, was approved in the U.S., the E.U and the U.K. BYOOVIZ launched in the U.S. in June 2022 and became commercially available in July 2022 through major distributors in the U.S.
Biosimilars revenue includes sales from BENEPALI, IMRALDI, FLIXABI and BYOOVIZ. BYOOVIZ launched in the U.S. in June 2022 and became commercially available in July 2022 through major distributors in the U.S. In 2023 BYOOVIZ became commercially available in certain international markets.
In accordance with contractual terms, wholesalers are permitted to return product for reasons such as damaged or expired product. The majority of wholesaler returns are due to product expiration. Provisions for product returns are recognized in the period the related revenue is recognized, resulting in a reduction to product sales. For 2022 compared to 2021, return reserves were relatively consistent.
The majority of wholesaler returns are due to product expiration. Provisions for estimated product returns are recognized in the period the related revenue is recognized, resulting in a reduction to product sales. For 2023 compared to 2022, the increase in returns was primarily driven by higher return rates in the U.S.
The provisions of the IRA will be effective for periods after December 31, 2022. The enactment of the IRA did not result in any material adjustments to our income tax provision or net deferred tax assets as of December 31, 2022.
The IRA did not result in any material adjustments to our income tax provision or other income tax balances as of December 31, 2023 and 2022. Preliminary guidance has been issued by the IRS and we expect additional guidance and regulations to be issued in future periods.
A significant amount of our research and development costs consist of indirect costs incurred in support of overall research and development activities and non-specific programs, including activities that benefit multiple programs, such as management costs, as well as depreciation, information technology and facility-based expenses.
Therefore, the same program could be reflected in different development stages in the same year. • Research and discovery: represents costs incurred to support our discovery research and translational science efforts. • Early stage programs: are programs in Phase 1 or Phase 2 development. • Late stage programs: are programs in Phase 3 development or in registration stage. • Marketed products: includes costs associated with product lifecycle management activities including, if applicable, costs associated with the development of new indications for existing products. • Other research and development costs: A significant amount of our research and development costs consist of indirect costs incurred in support of overall research and development activities and non-specific programs, including activities that benefit multiple programs, such as management costs, as well as depreciation, information technology and facility-based expenses.
Collaboration Profit (Loss) Sharing Collaboration profit (loss) sharing primarily includes Samsung Bioepis' 50.0% share of the profit or loss related to our biosimilars 2013 commercial agreement with Samsung Bioepis and, beginning in the second quarter of 2021, Eisai's 45.0% share of income and expense in the U.S. related to the ADUHELM Collaboration Agreement.
In the third quarter of 2023 we began recognizing collaboration profit sharing/(loss reimbursement) related to Sage's 50.0% share of income and expense in the U.S. related to ZURZUVAE for PPD. During 2022 we recognized Eisai's 45.0% share of income and expense in the U.S. related to the ADUHELM Collaboration Agreement.
The decrease was partially offset by an increase in costs associated with: • an increase in spending in the development of BIIB124 for the potential treatment of essential tremor; • an increase in spending in the development of litifilimab (BIIB059) for the potential treatment of CLE; • an increase in spending in the development of BIIB113 for the potential treatment of Alzheimer's disease; • an increase in spending in the development of BIIB131 for the potential treatment of acute ischemic stroke; and • an increase in spending in the development of BIIB121 for the potential treatment of Angelman syndrome.
EARLY STAGE PROGRAMS 2023 vs. 2022 The increase in early stage programs was driven by an increase in costs associated with: • development of BIIB121 for the treatment of Angelman syndrome; • development of litifilimab for the treatment of CLE; • development of BIIB115 for the treatment of SMA; • development of BIIB091 for the treatment of MS; and • development of BIIB080 for the treatment of Alzheimer's disease.
For the year ended December 31, 2021, amortization and impairment of acquired intangible assets reflects the impact of a $365.0 million impairment charge related to BIIB111, a $220.0 million impairment charge related to BIIB112 and a $44.3 million impairment charge related to vixotrigine for the potential treatment of TGN. 63 Table of Conten ts Amortization of acquired intangible assets, excluding impairment charges, totaled $246.3 million, $252.0 million and $255.1 million for the years ended December 31, 2022, 2021 and 2020, respectively.
Amortization of acquired intangible assets, excluding impairment charges, totaled $240.6 million, $246.3 million and $252.0 million for the years ended December 31, 2023, 2022 and 2021, respectively. The decrease in amortization of acquired intangible assets, excluding impairment charges, over the three years was primarily due to a lower rate of amortization for acquired intangible assets.
We are currently working with our contract manufacturer for IMRALDI to address facility regulatory inspection deficiencies at two filling locations, which could impact supply and have an adverse impact on 2023 IMRALDI sales, if not resolved. Manufacturing of BENEPALI also utilizes one of these facilities and therefore could have an adverse impact on 2023 BENEPALI sales.
We continue to work with our third-party contract manufacturers for IMRALDI and BENEPALI to address supply constraints. If not resolved these supply constraints could have an adverse impact on 2024 sales.
The net unrealized losses recognized during the year ended December 31, 2021, primarily reflect decreases in the aggregate fair value of our investments in Denali, Sage, Sangamo and Ionis common stock of approximately $819.6 million. For the year ended December 31, 2022, net interest expense was $157.3 million, compared to $242.6 million in 2021.
INTEREST INCOME AND EXPENSE For the year ended December 31, 2023, net interest income was $29.6 million, compared to net interest expense of $157.3 million in 2022. The increase was primarily due to higher interest rates leading to greater interest income earned on our investments in 2023, compared to 2022.
For 2022 compared to 2021, the 9.6% decrease in biosimilar revenue was primarily due to unfavorable pricing and the unfavorable impact of foreign currency exchange, partially offset by an increase in sales volumes.
We expect moderate growth in SPINRAZA in the U.S. as well as continued access expansion in emerging markets to offset increased competition and the impact of loading dose dynamics. 69 T able of Contents BIOSIMILARS • For 2023 compared to 2022, the increase in biosimilar revenue was primarily due to an increase in sales volumes related to the continued launch of BYOOVIZ in the U.S. and rest of world, partially offset by unfavorable BYOOVIZ pricing and the unfavorable impact of foreign currency exchange.
For 2022 compared to 2021, the decrease in contractual adjustments was primarily driven by lower TECFIDERA sales in the U.S., resulting in lower pharmacy rebates, Medicaid rebates and managed care rebates, as well as lower Medicaid rebates in the U.S. driven by a favorable change in estimates for VUMERITY. Returns Product return reserves are established for returns made by wholesalers.
For 2023 compared to 2022, the decrease in contractual adjustments was primarily due to lower government rebates in the U.S. as a result of a contract pharmacy change made during the first quarter of 2023 related to our Interferons, partially offset by higher managed care and Medicaid rebates in the U.S. and higher government rebates in rest of world.
We are awaiting the decision of the CJEU. For additional information, please read Note 21, Litigation, to our consolidated financial statements included in this report. We expect that TECFIDERA revenue will continue to decline in 2023, compared to 2022, as a result of generic competition in the North America, Latin America and certain E.U. countries.
Item 1A. Risk Factors, included in this report. TECFIDERA Multiple TECFIDERA generic entrants are now in North America, Brazil and certain E.U. countries and have deeply discounted prices compared to TECFIDERA. The generic competition for TECFIDERA has significantly reduced our TECFIDERA revenue and we expect that TECFIDERA revenue will continue to decline in the future.
For additional information on our IPR&D intangible assets, please read Note 7, Intangible Assets and Goodwill , to our consolidated financial statements included in this report. 65 Table of Conten ts Restructuring Charges 2022 Cost Saving Initiatives In December 2021 and May 2022 we announced our plans to implement a series of cost-reduction measures that when completed we expect may yield approximately $1.0 billion in expense savings.
For additional information on our IPR&D intangible assets, please read Note 7, Intangible Assets and Goodwill , to our consolidated financial statements included in this report. RESTRUCTURING CHARGES 2023 FIT FOR GROWTH RESTRUCTURING PROGRAM In 2023 we initiated additional cost saving measures as part of our Fit for Growth program to reduce operating costs, while improving operating efficiency and effectiveness.
During the first quarter of 2022, upon issuance of the final NCD related to ADUHELM, we recorded an increase in a valuation allowance of approximately $85.0 million to reduce the net value of this deferred tax asset to zero.
For 2023 compared to 2022, the change in net income (loss) attributable to noncontrolling interests, net of tax, was primarily due to an increase in a valuation allowance of approximately $85.0 million recorded in the first quarter of 2022.
The increase in sales volumes reflects growth in certain Asian markets, partially offset by a decrease in sales volumes from increased competition in certain established markets, particularly Germany and Japan. Despite competition from a gene therapy product and an oral product, we anticipate SPINRAZA revenue to be relatively flat in 2023, compared to 2022.
In 2024 we expect growth in rare disease revenue as we continue to launch SKYCLARYS in the U.S. Despite competition from a gene therapy product and an oral product, we anticipate SPINRAZA revenue to be relatively flat in 2024.
In January 2023 the EMA accepted for review the MAA for lecanemab. In January 2023 Eisai completed the submission of a MAA to the PMDA in Japan for lecanemab, and was granted Priority Review by the Japanese Ministry of Health, Labor and Welfare.
The meeting of the SAG is expected to take place during the first quarter of 2024 and the EC decision for the MAA of lecanemab is expected during the first half of 2024. • In January 2024 the NMPA approved LEQEMBI in China, with an expected launch date in 2024. • In December 2023 we and Eisai announced that LEQEMBI intravenous infusion was launched in Japan. • In September 2023 the Japanese Ministry of Health, Labor and Welfare approved LEQEMBI in Japan. • In January 2023 the EMA accepted for review the MAA for lecanemab. • In February 2023 the BLA for lecanemab was granted Priority Review by the NMPA of China. • In May 2023 we and Eisai announced the submission of a MAA for lecanemab to the U.K.
These charges were recognized in research and development expense in our consolidated statements of income for the year ended December 31, 2021. 64 Table of Conten ts For additional information on the amortization and impairment of our acquired intangible assets, please read Note 7, Intangible Assets and Goodwill , to our consolidated financial statements included in this report.
For additional information on the amortization and impairment of our acquired intangible assets, please read Note 7, Intangible Assets and Goodwill , to our consolidated financial statements included in this report. COLLABORATION PROFIT SHARING/(LOSS REIMBURSEMENT) Collaboration profit sharing/(loss reimbursement) primarily includes Samsung Bioepis' 50.0% share of the profit or loss related to our biosimilars 2013 commercial agreement with Samsung Bioepis.
This decrease was primarily due to a $666.5 million, or 10.9%, decrease in MS product revenue, a $111.6 million, or 5.9%, decrease in SPINRAZA product revenue and an $80.0 million, or 9.6%, decrease in revenue from our biosimilar business. ◦ The decrease in MS product revenue of $666.5 million, or 10.9%, from $6,096.7 million in 2021 to $5,430.2 million in 2022, was primarily due to a decrease in TECFIDERA demand as a result of multiple TECFIDERA generic entrants in North America, Brazil and certain E.U. countries, and a decrease in Interferon demand due to competition as patients transition to higher efficacy and oral MS therapies. ◦ The decrease in SPINRAZA revenue of $111.6 million, or 5.9%, from $1,905.1 million in 2021 to $1,793.5 million in 2022, was primarily due to country mix, the unfavorable impact of foreign currency exchange and the timing of shipments, partially offset by an increase in sales volumes.
SPINRAZA revenue increased $10.3 million, from $600.2 million in 2022 to $610.5 million in 2023, or 1.7%, primarily due to an increase in pricing, partially offset by higher discounts and allowances. • Rest of world SPINRAZA revenue decreased $62.6 million, from $1,193.3 million in 2022 to $1,130.7 million in 2023, or 5.2%, primarily due to the unfavorable impact of foreign currency exchange, a decrease in demand in certain European markets driven by increased competition, a decrease in pricing and the timing of shipments in certain Asian markets. • U.S.
For additional information on our revenue reserves, please read Note 5, Revenue, to our consolidated financial statements included in this report.
The change also benefits from the resolution of an uncertain tax matter during the first quarter of 2023 related to tax credits. For additional information on our acquisition of Reata, please read Note 2, Acquisitions , to our consolidated financial statements included in this report.
Royalty Cost of Sales For 2022 compared to 2021, the decrease in royalty cost of sales was primarily due to lower royalties payable on lower sales of SPINRAZA, TYSABRI and AVONEX, partially offset by higher royalties payable on higher sales of VUMERITY.
ROYALTY COST OF SALES For 2023 compared to 2022, the decrease in royalty cost of sales was primarily due to lower royalties payable on lower sales of TYSABRI, partially offset by an increase in royalty cost of sales due to higher royalties payable on higher sales of VUMERITY and SKYCLARYS, which we began recognizing in the fourth quarter of 2023, subsequent to our acquisition of Reata. 75 T able of Contents RESEARCH AND DEVELOPMENT Research and development expense, as a percentage of total revenue, was 25.0%, 21.9% and 22.8% for the years ended December 31, 2023, 2022 and 2021, respectively.
For additional information on our collaboration arrangements with Eisai, please read Note 19, Collaborative and Other Relationships, to our consolidated financial statements included in this report. Selling, General and Administrative For 2022 compared to 2021, the decrease in selling, general and administrative expense was primarily due to cost-reduction measures realized during 2022.
For additional information on our acquisition of Reata, please read Note 2, Acquisitions , to our consolidated financial statements included in this report. 77 T able of Contents SELLING, GENERAL AND ADMINISTRATIVE For 2023 compared to 2022, selling, general and administrative expense increased by approximately 6.1% primarily due to the recognition of approximately $196.4 million in equity-based compensation expense related to our acquisition of Reata in September 2023.
Eisai Collaboration Agreements LEQEMBI (lecanemab) Collaboration Agreement In January 2023 we and Eisai announced that the FDA granted accelerated approval of LEQEMBI, an anti-amyloid antibody for the treatment of Alzheimer's disease. Additionally, in January 2023 we and Eisai announced the completed submission of a supplemental BLA to the FDA for traditional approval of LEQEMBI.
RECENT DEVELOPMENTS DEVELOPMENTS IN KEY COLLABORATIVE RELATIONSHIPS LEQEMBI (lecanemab) United States In July 2023 the FDA granted traditional approval of LEQEMBI, an anti-amyloid antibody for the treatment of Alzheimer's disease, which was previously granted accelerated approval by the FDA in January 2023. Following the FDA's traditional approval of LEQEMBI, CMS confirmed broader coverage of LEQEMBI.
As a result of the lease assignment, we derecognized the related operating lease obligation and right-of-use asset during the second quarter of 2022. For the year ended December 31, 2022, we recognized other restructuring costs of approximately $13.2 million, which were recorded in restructuring charges in our consolidated statements of income.
In connection with this termination, we recorded close-out costs of approximately $13.2 million in research and development expense within our consolidated statements of income for the year ended December 31, 2023.
We do not anticipate a supply shortage in 2023 and are currently focused on rebuilding adequate inventory . 54 Table of Conten ts Interferon For 2022 compared to 2021, the 18.9% decrease in U.S. Interferon revenue was primarily due to a decrease in Interferon sales volumes of 15.5%.
In addition, we are in the process of securing regulatory approval for a secondary source of supply. We do not anticipate a supply shortage in 2024 and are currently focused on rebuilding adequate inventory. 68 T able of Contents RARE DISEASE • U.S.
Reserves for discounts, contractual adjustments and returns that reduced gross product revenue are summarized as follows: 58 Table of Conten ts For the years ended December 31, 2022, 2021 and 2020, reserves for discounts and allowances as a percentage of gross product revenue were 30.1%, 28.6% and 27.1%, respectively. Discounts Discounts include trade term discounts and wholesaler incentives.
If actual results vary, we adjust these estimates, which could have an effect on earnings in the period of adjustment. 72 T able of Contents Reserves for discounts, contractual adjustments and returns that reduced gross product revenue are summarized as follows: For the Years Ended December 31, (In millions) 2023 2022 2021 Contractual adjustments $ 2,681.7 $ 2,716.9 $ 2,852.6 Discounts 735.2 663.9 732.8 Returns 38.2 5.1 11.9 Total discounts and allowances $ 3,455.1 $ 3,385.9 $ 3,597.3 For the years ended December 31, 2023, 2022 and 2021, reserves for discounts and allowances as a percentage of gross product revenue were 32.0%, 30.1% and 28.6%, respectively.
As a result, we recognized approximately $10.4 million of accelerated depreciation expense, which was recorded in restructuring charges in our consolidated statements of income for the year ended December 31, 2022 . In May 2022 we entered into a lease assignment agreement whereby we assigned our remaining lease obligations to an external third party.
As a result, we recorded a net gain on the deconsolidation of 81 T able of Contents Neurimmune of approximately $3.0 million, which was recorded in other (income) expense, net within our consolidated statements of income for the year ended December 31, 2023.
As described below under Results of Operations , our net income and diluted earnings per share attributable to Biogen Inc. for the year ended December 31, 2022, compared to the year ended December 31, 2021, reflects the following: Revenue • Total revenue was $10,173.4 million for 2022, representing an $808.3 million, or 7.4%, decrease compared to $10,981.7 million in 2021. • Product revenue, net totaled $7,987.8 million for 2022, representing an $859.1 million, or 9.7%, decrease compared to $8,846.9 million in 2021.
We will continue to assess as further information becomes available. 62 T able of Contents FINANCIAL HIGHLIGHTS As described below under Results of Operations , our net income and diluted earnings per share attributable to Biogen Inc. for the year ended December 31, 2023, compared to the year ended December 31, 2022, reflects the following: TOTAL REVENUE Decreased $337.8 million or 3.3% DILUTED EARNINGS PER SHARE Decreased $12.90 or 61.8% PRODUCT REVENUE Decreased $741.1 million or 9.3% • MS revenue decreased $768.3 million, or 14.1% • Rare disease revenue increased $9.5 million, or 0.5% • Biosimilars revenue increased $18.9 million, or 2.5% • The decrease in MS product revenue was primarily due to a decrease in TECFIDERA demand as a result of multiple TECFIDERA generic entrants in North America, Brazil and certain E.U. countries, a decrease in Interferon demand due to competition as patients transition to higher efficacy therapies and a decrease in U.S.
We expect an increase in VUMERITY sales volumes in 2023, compared to 2022, mostly due to demand growth in the U.S. and select European markets. We believe that we have resolved previously reported manufacturing issues at our contract manufacturer. In addition, we are in the process of securing regulatory approval for a secondary source of supply.
We are also aware of a biosimilar entrant of TYSABRI that was approved in the U.S. in August 2023 and the E.U. in September 2023. We believe that future sales of TYSABRI may be adversely affected by the entrance of this biosimilar. We believe that we have resolved previously reported manufacturing issues at our VUMERITY contract manufacturer.
Under these initiatives, we estimate we will incur total restructuring charges of approximately $131.0 million, primarily related to severance. These amounts were substantially incurred during 2022. As of December 31, 2022, approximately $35.9 million remained in our restructuring reserve and payments are expected to be made through 2026.
Charges related to our 2022 cost saving initiatives were substantially incurred during 2022 with remaining payments expected to be made through 2026. 79 T able of Contents Total charges incurred from our 2022 cost saving initiatives are summarized as follows: For the Years Ended December 31, 2023 2022 (In millions) Severance Costs Accelerated Depreciation and Other Costs Total Severance Costs Accumulated Depreciation and Other Costs (1) Total Restructuring charges $ (2.2) $ 2.6 $ 0.4 $ 112.6 $ 18.5 $ 131.1 Total charges $ (2.2) $ 2.6 $ 0.4 $ 112.6 $ 18.5 $ 131.1 (1) Amounts reflect a gain recorded during the third quarter of 2022 of approximately $5.3 million related to the partial termination of a portion of our lease located at 300 Binney Street.