Business Wire | Nov 3, 2021 07:00AM EDT

Horizon Therapeutics plc Reports Record Third-Quarter 2021 Financial Results; Increasing Full-Year 2021 Net Sales and Adjusted EBITDA Guidance

Nov. 03, 2021

DUBLIN--(BUSINESS WIRE)--Nov. 03, 2021--Horizon Therapeutics plc (Nasdaq: HZNP) today announced record third-quarter 2021 financial results and increased both its full-year 2021 net sales and adjusted EBITDA guidance.

"We generated record results in the third quarter and made significant progress executing our R&D strategy, further expanding our pipeline with five new programs," said Tim Walbert, chairman, president and chief executive officer, Horizon. "In addition to our strong commercial execution with TEPEZZA and KRYSTEXXA, our expanded pipeline positions us to drive future growth and diversification, as well as address the unmet medical needs of many people living with rare, autoimmune and severe inflammatory diseases around the world."

Financial Highlights (in millions except % %for per share amounts Q3 21 Q3 20 Change YTD 21 YTD 20 Changeand percentages) Net sales $ 1,037.0 $ 636.4 63 $ 2,211.9 $ 1,455.1 52

Net income 326.5 292.8 12 361.3 199.2 81

Non-GAAP net income 413.8 392.2 6 802.5 559.2 44

Adjusted EBITDA 509.0 329.8 54 921.8 627.7 47

Earnings per share - 1.38 1.31 5 1.54 0.95 62dilutedNon-GAAP earnings per 1.75 1.74 1 3.41 2.58 32share - diluted Third Quarter and Recent Company Highlights

* Announced Five New R&D Programs and Highlighted Expanded Pipeline at Inaugural R&D Day: In September, the Company announced four new programs for its development-stage candidate daxdilimab (HZN-7734) in alopecia areata, discoid lupus erythematosus, dermatomyositis and lupus nephritis and one new program for its development-stage candidate dazodalibep (HZN-4920) in focal segmental glomerulosclerosis. The Company expects to initiate Phase 2 trials in each of these indications in 2022. The new programs, in addition to the Company's R&D strategy and other key programs, were highlighted at the Company's inaugural R&D Day in September. * Announced Positive Topline Data from KRYSTEXXA MIRROR Trial: In October, the Company announced positive topline results from the MIRROR Phase 4 randomized, placebo-controlled trial evaluating the use of KRYSTEXXA plus methotrexate. The MIRROR trial results demonstrated that 71 percent of patients who were randomized to receive KRYSTEXXA plus methotrexate achieved a complete response rate at Month 6 (p<0.001), a significant improvement from the 40 percent response rate in patients who were randomized to receive KRYSTEXXA plus placebo. In the Phase 3 clinical program, which evaluated KRYSTEXXA alone compared to placebo, 42 percent of patients receiving KRYSTEXXA achieved a complete response. The Company plans to submit a sBLA to the U.S. FDA in the first quarter of 2022. Full data from the trial is expected to be presented at future medical meetings. KRYSTEXXA plus immunomodulation is a core element of the Company's strategy to maximize the value of KRYSTEXXA and enable more patients with uncontrolled gout to benefit from the medicine. * Initiated Enrollment in TEPEZZA Chronic TED Trial: In September, the first patient was enrolled in a Phase 4 randomized, placebo-controlled clinical trial to evaluate the safety and efficacy of TEPEZZA for the treatment of chronic TED. TED is a serious, progressive and potentially vision-threatening rare autoimmune disease. It begins with an acute phase where inflammatory signs and symptoms, such as eye pain, swelling, proptosis (eye bulging) and diplopia (double vision), progress over time. The acute stage is followed by a chronic phase in which inflammation is no longer present or has markedly diminished; however, significant signs and symptoms may remain and continue to impact the quality of life. The objective of the trial is to generate clinical data to better inform physicians and payers about the safety and efficacy of TEPEZZA in patients with chronic TED. Results are expected in the second half of 2022. * Presented New UPLIZNA(r) (inebilizumab-cdon) Data at Key Medical Meetings: New UPLIZNA data were presented at the 15th World Congress on Controversies in Neurology (CONy Virtual), including end-of-study data from the open-label extension period of the Phase 3 trial in patients with neuromyelitis optica spectrum disorder (NMOSD). The data indicated that UPLIZNA may provide durable efficacy and a favorable safety profile for African Americans with NMOSD. Multiple new data were also presented at the virtual 37th Congress of the European Committee for Treatment and Research in Multiple Sclerosis (ECTRIMS) in October. Additionally, a new analysis of data from the Phase 3 trial was published in the Multiple Sclerosis Journal that highlighted a sustained effect on attack risk in people with NMOSD who were treated with UPLIZNA for four or more years. * Acquired Biologics Manufacturing Facility in Waterford, Ireland: In July, the Company completed the acquisition of a biologics drug product manufacturing facility in Waterford, Ireland. The Company intends to use the manufacturing facility to support the growth of the Company's on-market medicines, including TEPEZZA, KRYSTEXXA and UPLIZNA, as well as development-stage biologics. * Continued to Demonstrate Gender and Ethnicity Pay Equity: A second study conducted by Aon, a leading compensation consulting firm, showed that Horizon continues to demonstrate both gender and ethnicity pay equity. This study was a follow-on study to the gender and pay ethnicity study Aon conducted in 2019. The Company maintained its gender and ethnicity pay equity despite having grown significantly in the two years since the first study, as well as having completed the acquisition of Viela Bio, which included the addition of a significant number of employees. * Multiple Additional Recognitions as a Best Workplace: In September, the Company was named one of the "2021 Best Workplaces for Women(tm)" by Fortune and Great Place to Work(r) for the first time. In addition, the Company was also recognized as one of PEOPLE's "100 Companies That Care(r)" for the third year. In July, Fortune and Great Place to Work named the Company to the "Best Workplaces for Millennials(tm)" list for the second consecutive year and the Company was the highest ranked biotechnology company on the list. In addition, in October the Company was named one of the Top 100 Adoption-Friendly Workplaces by the Dave Thomas Foundation for Adoption for the third consecutive year. Most recently, Horizon was named to Newsweek's inaugural "Most Loved Workplaces" list, ranking among the top 100 companies recognized for employee happiness and satisfaction at work and was the highest-ranked company in the biotechnology and pharmaceutical category. To date in 2021, the Company has received 11 workplace-related recognitions, reflecting the high level of engagement of its employees.

Key Clinical Development Programs

* Daxdilimab (HZN-7734), an anti-ILT7 human monoclonal antibody that depletes certain dendritic cells. Depleting these cells may interrupt the cycle of inflammation that causes tissue damage in diseases such as lupus, and a variety of other autoimmune conditions. Systemic Lupus Erythematosus (SLE) Trial: Phase 2 randomized, placebo-controlled trial underway to evaluate daxdilimab in patients with SLE, a disease in which the body's immune system attacks its own tissues and organs. Alopecia Areata Trial: Phase 2 trial to evaluate daxdilimab in patients with alopecia areata, an autoimmune disorder characterized by nonscarring hair loss, expected to initiate in the first half of 2022. Discoid Lupus Erythematosus (DLE) Trial:Phase 2 trial to evaluate daxdilimab in patients with DLE, a rare, chronic, inflammatory skin condition characterized by lesions that result in scarring, expected to initiate in the first half of 2022. Lupus Nephritis Trial: Phase 2 trial to evaluate daxdilimab in patients with lupus nephritis, a rare, autoimmune disorder characterized by rashes, debilitating muscle weakness and interstitial lung disease, expected to initiate in the second half of 2022. Dermatomyositis Trial: Phase 2 trial to evaluate daxdilimab in patients with dermatomyositis, a rare, autoimmune and inflammatory condition of the kidney, expected to initiate in the second half of 2022. * Dazodalibep (HZN-4920), a CD40 ligand antagonist that blocks T cell interaction with the CD40-expressing B cells, disrupting the overactivation of the CD40 ligand co-stimulatory pathway. Several autoimmune diseases are associated with the overactivation of this pathway. Sjgren's Syndrome Trial: Phase 2b randomized, placebo-controlled trial underway to evaluate dazodalibep in patients with Sjgren's syndrome, a chronic, systemic autoimmune condition that impacts exocrine glands, including the salivary and tear glands. Rheumatoid Arthritis Trial: Phase 2 randomized, placebo-controlled trial underway to evaluate dazodalibep in patients with rheumatoid arthritis. Kidney Transplant Rejection Trial: Phase 2 open-label trial underway to evaluate dazodalibep in kidney transplant rejection patients. Focal Segmental Glomerulosclerosis (FSGS) Trial: Phase 2 trial to evaluate dazodalibep in patients with FSGS, a rare kidney disorder characterized by scarring of glomeruli, expected to initiate in the second half of 2022. * HZN-825, an oral lysophosphatidic acid receptor 1 (LPAR1) antagonist that prevents gene activation. Diffuse Cutaneous Systemic Sclerosis Trial: Pivotal Phase 2b trial to evaluate HZN-825 in diffuse cutaneous systemic sclerosis, expected to initiate in the fourth quarter of 2021. Interstitial Lung Disease Trial: Pivotal Phase 2b trial to evaluate HZN-825 in idiopathic pulmonary fibrosis, the most common form of interstitial lung disease, expected to initiate in the fourth quarter of 2021. * UPLIZNA, an anti-CD19 humanized monoclonal antibody that depletes B cells, including the pathogenic cells that produce autoantibodies. Myasthenia Gravis Trial:Phase 3 randomized, placebo-controlled trial underway to evaluate UPLIZNA in patients with myasthenia gravis, a chronic, rare, autoimmune neuromuscular disease that affects voluntary muscles, especially those that control the eyes, mouth, throat and limbs. IgG4-Related Disease Trial: Phase 3 randomized, placebo-controlled trial underway to evaluate UPLIZNA in patients with IgG4-related disease, which is a group of disorders marked by tumor-like swelling and fibrosis of affected organs, such as the pancreas, salivary glands and kidneys. Kidney Transplant Desensitization Trial: Phase 2 open-label trial underway to evaluate UPLIZNA, dazodalibep or both in highly sensitized patients waiting for a kidney transplant. * TEPEZZA, an insulin-like growth factor type 1 receptor (IGF-1R) antagonist monoclonal antibody. Chronic TED Trial: Phase 4 randomized, placebo-controlled trial initiated in September 2021 to evaluate TEPEZZA in chronic TED. Subcutaneous (SC) Administration Trial:Phase 1 pharmacokinetic trial underway to explore SC administration of TEPEZZA. Diffuse Cutaneous Systemic Sclerosis Exploratory Trial: Phase 1 exploratory trial to evaluate TEPEZZA in diffuse cutaneous systemic sclerosis expected to initiate in the fourth quarter of 2021. * KRYSTEXXA, a recombinant uricase enzyme that converts urate into a water-soluble liquid, allantoin, that can be easily excreted from the body. MIRROR Trial: Phase 4 randomized, placebo-controlled trial to evaluate KRYSTEXXA plus methotrexate to increase the complete response rate in patients with uncontrolled gout. Topline results were announced on Oct. 25, 2021. The results demonstrated that 71 percent of patients who were randomized to receive KRYSTEXXA plus methotrexate achieved a complete response rate at Month 6 (p<0.001), a significant improvement from the 40 percent response rate in patients who were randomized to receive KRYSTEXXA plus placebo. PROTECT Trial: Phase 4 open-label trial to evaluate KRYSTEXXA to improve management of uncontrolled gout in kidney transplant patients. This trial is completed, and final results will be presented at American Society of Nephrology (ASN) Kidney Week 2021 later this week. Shorter Infusion Duration Trial: Phase 4 open-label trial underway to evaluate the impact of administering KRYSTEXXA plus methotrexate over a shorter infusion duration in patients with uncontrolled gout. Monthly Dosing Trial:Phase 4 open-label trial underway to evaluate monthly dosing of KRYSTEXXA plus methotrexate in patients with uncontrolled gout. Retreatment Trial: Phase 4 open-label trial underway to evaluate KRYSTEXXA plus methotrexate in patients who were not complete responders to KRYSTEXXA monotherapy. * HZN-1116 Autoimmune Disease Trial: Phase 1 trial initiated in July 2021 to evaluate HZN-1116, a monoclonal antibody, in patients with autoimmune diseases.

Third-Quarter Financial Results

Note: For additional detail and reconciliation of non-GAAP financial measures to the most directly comparable GAAP financial measures, please refer to the tables at the end of this release.

* Net Sales: Third-quarter 2021 net sales were $1.037 billion, an increase of 63 percent compared to the third quarter of 2020. * Gross Profit: Under U.S. GAAP, the third-quarter 2021 gross profit ratio was 75.7 percent compared to 76.2 percent in the third quarter of 2020. The non-GAAP gross profit ratio in the third quarter of 2021 was 85.4 percent compared to 86.7 percent in the third quarter of 2020. * Operating Expenses: R&D expenses were 9.0 percent of net sales and SG&A expenses were 34.7 percent of net sales. Non-GAAP R&D expenses were 7.2 percent of net sales and non-GAAP SG&A expenses were 29.0 percent of net sales. * Income Tax Expense (Benefit): On a GAAP basis in the third quarter of 2021, income tax benefit was $19.3 million. Third-quarter non-GAAP income tax expense was $73.8 million. * Net Income: In the third-quarter of 2021, net income on a GAAP and non-GAAP basis was $326.5 million and $413.8 million, respectively. * Adjusted EBITDA: Third-quarter 2021 adjusted EBITDA was $509.0 million. * Earnings per Share: On a GAAP basis, diluted earnings per share in the third quarter of 2021 and 2020 were $1.38 and $1.31, respectively. Non-GAAP diluted earnings per share in the third quarter of 2021 and 2020 were $1.75 and $1.74, respectively. Weighted average shares outstanding used for calculating GAAP and non-GAAP diluted earnings per share in the third quarter of 2021 were 236.2 million.

Third-Quarter Segment Results

Management uses net sales and segment operating income to evaluate the performance of the Company's two segments, the orphan segment and the inflammation segment. While segment operating income contains certain adjustments to the directly comparable GAAP figures in the Company's consolidated financial results, it is considered to be prepared in accordance with GAAP for purposes of presenting the Company's segment operating results.

Orphan Segment(in millions except for Q3 21 Q3 20 % YTD 21 YTD 20 %percentages) Change Change TEPEZZA^(r) 616.4 286.9 115 1,071.7 476.3 125

KRYSTEXXA^(r) 158.1 108.5 46 395.2 276.9 43

RAVICTI^(r)(1) 76.2 64.6 18 217.6 191.4 14

PROCYSBI^(r) 49.3 43.1 14 142.5 122.8 16

ACTIMMUNE^(r) 30.1 28.3 6 86.6 83.1 4

UPLIZNA^(r)(2) 18.7 - NM 35.0 - NM

BUPHENYL^(r)(1) 1.9 3.2 (42 ) 5.8 8.4 (31 )

QUINSAIR^TM 0.3 0.2 84 0.7 0.5 47

Orphan Net Sales $ 951.0 $ 534.8 78 $ 1,955.1 $ 1,159.4 69

Orphan Segment Operating $ 476.2 $ 274.7 73 $ 798.5 $ 480.6 66 Income(1) On Oct. 27, 2020, the Company sold its rights to develop and commercialize RAVICTI and BUPHENYL in Japan to Medical Need Europe AB, part of the Immedica Group. The Company has retained the rights to RAVICTI and BUPHENYL in North America.

(2) UPLIZNA was acquired on March 15, 2021.

* Third-quarter 2021 net sales of the orphan segment, the Company's strategic growth segment, were $951.0 million, an increase of 78 percent over the prior year's quarter, driven by the strong performance of TEPEZZA, KRYSTEXXA, RAVICTI, PROCYSBI and ACTIMMUNE. The orphan segment represented 92 percent of total company third-quarter net sales. * KRYSTEXXA third-quarter 2021 net sales increased 46 percent year-over-year driven by increased adoption of KRYSTEXXA plus immunomodulation, which now exceeds 45 percent. In addition, the Company continues to see strong uptake of KRYSTEXXA from both rheumatologists and nephrologists. * Third-quarter 2021 orphan segment operating income was $476.2 million, which includes additional investment associated with TEPEZZA, UPLIZNA and the Company's pipeline programs.

^(1) On Oct. 27, 2020, the Company sold its rights to develop and commercializeRAVICTI and BUPHENYL in Japan to Medical Need Europe AB, part of the ImmedicaGroup. The Company has retained the rights to RAVICTI and BUPHENYL in NorthAmerica.

^(2) UPLIZNA was acquired on March 15, 2021.

* Third-quarter 2021 net sales of the orphan segment, the Company's strategic growth segment, were $951.0 million, an increase of 78 percent over the prior year's quarter, driven by the strong performance of TEPEZZA, KRYSTEXXA, RAVICTI, PROCYSBI and ACTIMMUNE. The orphan segment represented 92 percent of total company third-quarter net sales. * KRYSTEXXA third-quarter 2021 net sales increased 46 percent year-over-year driven by increased adoption of KRYSTEXXA plus immunomodulation, which now exceeds 45 percent. In addition, the Company continues to see strong uptake of KRYSTEXXA from both rheumatologists and nephrologists. * Third-quarter 2021 orphan segment operating income was $476.2 million, which includes additional investment associated with TEPEZZA, UPLIZNA and the Company's pipeline programs.

Inflammation Segment

(in millions except for Q3 21 Q3 20 % YTD 21 YTD 20 %percentages) Change Change PENNSAID 2%^(r) 48.0 50.3 (5 ) 142.7 126.9 12

DUEXIS^(r)(1) 20.9 27.9 (25 ) 62.5 87.1 (28 )

RAYOS^(r) 14.9 18.1 (18 ) 43.6 50.8 (14 )

VIMOVO^(r)(2) 2.2 5.3 (58 ) 8.1 30.9 (74 )

Inflammation Net Sales $ 86.0 $ 101.6 (15 ) $ 256.9 $ 295.7 (13 )

Inflammation Segment $ 34.1 $ 55.1 (38 ) $ 123.6 $ 145.1 (15 )Operating Income ^(1) On Aug. 4, 2021, Alkem Laboratories, Inc. initiated an at-risk launch ofgeneric DUEXIS in the United States.

^(2) On Feb. 27, 2020, Dr. Reddy's Laboratory initiated an at-risk launch ofgeneric VIMOVO in the United States.

* Third-quarter 2021 net sales of the inflammation segment were $86.0 million, and segment operating income was $34.1 million.

Cash Flow Statement and Balance Sheet Highlights

* On a GAAP basis, operating cash flow in the third quarter of 2021 was $411.0 million. Non-GAAP operating cash flow was $432.3 million.

* As of Sept. 30, 2021, the Company had cash and cash equivalents of $1.069 billion.

* As of Sept. 30, 2021, the total principal amount of debt outstanding was $2.610 billion, and the gross-debt-to-last-12-months adjusted EBITDA leverage ratio was 2.0 times.

2021 Guidance

The Company now expects full?year 2021 net sales to range between $3.16 billion and $3.21 billion, representing 45 percent growth at the midpoint and an increase from the previous range of $3.025 billion to $3.125 billion. The company now expects TEPEZZA full-year 2021 net sales of greater than $1.625 billion with year-over-year growth of more than 60 percent in the fourth quarter, compared to the previous guidance of greater than $1.550 billion with year-over-year growth of more than 50 percent in the fourth quarter. The Company now expects KRYSTEXXA full-year 2021 net sales of greater than $550 million, compared to the previous guidance of greater than $500 million. Full-year 2021 adjusted EBITDA is now expected to range between $1.315 billion and $1.345 billion, representing 33 percent growth at the midpoint and an increase from the previous guidance range of $1.26 billion to $1.30 billion.

Webcast

At 8 a.m. EST / 12 p.m. GMT today, the Company will host a live webcast to review its financial and operating results and provide a general business update. The live webcast and a replay may be accessed at http://ir.horizontherapeutics.com. Please connect to the Company's website at least 15 minutes prior to the live webcast to ensure adequate time for any software download that may be needed to access the webcast. A replay of the webcast will be available approximately two hours after the live webcast.

About Horizon

Horizon is focused on the discovery, development and commercialization of medicines that address critical needs for people impacted by rare, autoimmune and severe inflammatory diseases. Our pipeline is purposeful: we apply scientific expertise and courage to bring clinically meaningful therapies to patients. We believe science and compassion must work together to transform lives. For more information on how we go to incredible lengths to impact lives, please visit www.horizontherapeutics.com and follow us on Twitter, LinkedIn, Instagram and Facebook.

Note Regarding Use of Non-GAAP Financial Measures

EBITDA, or earnings before interest, taxes, depreciation and amortization, and adjusted EBITDA are used and provided by Horizon as non-GAAP financial measures. Horizon provides certain other financial measures such as non-GAAP net income, non-GAAP diluted earnings per share, non-GAAP gross profit and gross profit ratio, non-GAAP operating expenses, non-GAAP operating income, non-GAAP tax (benefit) and tax rate and non-GAAP operating cash flow, each of which include adjustments to GAAP figures. These non-GAAP measures are intended to provide additional information on Horizon's performance, operations, expenses, profitability and cash flows. Adjustments to Horizon's GAAP figures as well as EBITDA exclude acquisition and/or divestiture-related expenses, gain or loss from divestiture, gain or loss from sale of assets, upfront, progress and milestone payments related to license and collaboration agreements, litigation settlements, loss on debt extinguishment, costs of debt refinancing, drug manufacturing harmonization costs, restructuring and realignment costs, the income tax effect on pre-tax non-GAAP adjustments and other non-GAAP income tax adjustments, as well as non-cash items such as share-based compensation, depreciation and amortization, non-cash interest expense, long-lived asset impairment charges and other non-cash adjustments. Certain other special items or substantive events may also be included in the non-GAAP adjustments periodically when their magnitude is significant within the periods incurred. Horizon maintains an established non-GAAP cost policy that guides the determination of what costs will be excluded in non-GAAP measures. Horizon believes that these non-GAAP financial measures, when considered together with the GAAP figures, can enhance an overall understanding of Horizon's financial and operating performance. The non-GAAP financial measures are included with the intent of providing investors with a more complete understanding of the Company's historical and expected 2021 financial results and trends and to facilitate comparisons between periods and with respect to projected information. In addition, these non-GAAP financial measures are among the indicators Horizon's management uses for planning and forecasting purposes and measuring the Company's performance. For example, adjusted EBITDA is used by Horizon as one measure of management performance under certain incentive compensation arrangements. These non-GAAP financial measures should be considered in addition to, and not as a substitute for, or superior to, financial measures calculated in accordance with GAAP. The non-GAAP financial measures used by the Company may be calculated differently from, and therefore may not be comparable to, non-GAAP financial measures used by other companies. Horizon has not provided a reconciliation of its full-year 2021 adjusted EBITDA outlook to an expected net income (loss) outlook because certain items such as acquisition/divestiture-related expenses and share-based compensation that are a component of net income (loss) cannot be reasonably projected due to the significant impact of changes in Horizon's stock price, the variability associated with the size or timing of acquisitions/divestitures and other factors. These components of net income (loss) could significantly impact Horizon's actual net income (loss).

Forward-Looking Statements

This press release contains forward-looking statements, including, but not limited to, statements related to Horizon's full-year 2021 net sales and adjusted EBITDA guidance; expected financial performance and operating results in future periods, including potential growth in net sales of certain of Horizon's medicines; development, manufacturing and commercialization plans; expected timing of clinical trials, availability of clinical data and regulatory submissions; potential market opportunity for and benefits of Horizon's medicines and medicine candidates and business and other statements that are not historical facts. These forward-looking statements are based on Horizon's current expectations and inherently involve significant risks and uncertainties. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of these risks and uncertainties, which include, without limitation, risks that Horizon's actual future financial and operating results may differ from its expectations or goals; Horizon's ability to grow net sales from existing medicines; impacts of the COVID-19 pandemic and actions taken to slow its spread, including impacts on supplies and net sales of Horizon's medicines and potential delays in clinical trials; the fact that Horizon's full-year 2021 net sales, adjusted EBITDA and TEPEZZA net sales guidance and the expected timing of certain TEPEZZA clinical trials assume that future committed manufacturing slots for TEPEZZA are not cancelled and are run successfully, which could be impacted by additional government-mandated COVID-19 vaccine production orders and other risks associated with the manufacture of biologic medicines; risks associated with acquisitions, such as the risk that the businesses will not be integrated successfully, that such integration may be more difficult, time-consuming or costly than expected or that the expected benefits of the transaction will not occur; the availability of coverage and adequate reimbursement and pricing from government and third-party payers; risks relating to Horizon's ability to successfully implement its business strategies, including its manufacturing and global expansion strategy; risks inherent in developing novel medicine candidates and existing medicines for new indications; risks associated with regulatory approvals; risks in the ability to recruit, train and retain qualified personnel; competition, including potential generic competition; the ability to protect intellectual property and defend patents; regulatory obligations and oversight, including any changes in the legal and regulatory environment in which Horizon operates and those risks detailed from time-to-time under the caption "Risk Factors" and elsewhere in Horizon's filings and reports with the SEC. Horizon undertakes no duty or obligation to update any forward-looking statements contained in this press release as a result of new information.

Horizon Therapeutics plcCondensed Consolidated Statements of Operations (Unaudited)(in thousands, except share and per share data) Three Months Ended September 30, Nine Months Ended September 30,

2021 2020 2021 2020

Net sales $ 1,036,992 $ 636,427 $ 2,211,946 $ 1,455,115

Cost of goods 251,640 151,475 553,003 370,406 sold Gross profit 785,352 484,952 1,658,943 1,084,709

OPERATING EXPENSES: Research and 93,549 30,206 291,076 138,483 development Selling, 360,260 226,164 1,047,456 696,271 general and administrative Impairment of - - 12,371 - long-lived asset Gain on sale - - (2,000 ) - of asset Total 453,809 256,370 1,348,903 834,754 operating expenses Operating 331,543 228,582 310,040 249,955 income OTHER EXPENSE, NET: Interest (22,977 ) (12,185 ) (59,018 ) (48,100 ) expense, net Loss on debt - (14,602 ) - (31,856 ) extinguishment Foreign (476 ) (753 ) (1,363 ) 306 exchange (loss) gain Other (849 ) 717 2,113 1,791 (expense) income, net Total other (24,302 ) (26,823 ) (58,268 ) (77,859 ) expense, net Income before 307,241 201,759 251,772 172,096 benefit for income taxes Benefit for (19,302 ) (91,081 ) (109,537 ) (27,143 ) income taxes Net income $ 326,543 $ 292,840 $ 361,309 $ 199,239

Net income per $ 1.44 $ 1.38 $ 1.61 $ 1.00 ordinary share - basic Weighted average 226,096,747 212,320,219 225,053,704 198,413,779 ordinary shares outstanding - basic Net income per $ 1.38 $ 1.31 $ 1.54 $ 0.95 ordinary share - diluted Weighted average 236,198,789 223,743,903 235,256,424 208,678,460 ordinary shares outstanding - dilutedHorizon Therapeutics plcCondensed Consolidated Balance Sheets (Unaudited)(in thousands, except share data)As ofSeptember 30,2021December 31,2020ASSETSCURRENT ASSETS:Cash and cash equivalents$

1,068,547

$

2,079,906

Restricted cash3,839

3,573

Accounts receivable, net775,371

659,701

Inventories, net237,434

75,283

Prepaid expenses and other current assets328,730

251,945

Total current assets2,413,921

3,070,408

Property, plant and equipment, net285,837

189,037

Developed technology and other intangible assets, net3,051,135

1,782,962

In-process research and development880,000

-

Goodwill1,069,031

413,669

Deferred tax assets, net782,852

560,841

Other assets125,912

55,699

Total assets$

8,608,688

$

6,072,616

LIABILITIES AND SHAREHOLDERS' EQUITYCURRENT LIABILITIES:Accounts payable$

50,724

$

37,710

Accrued expenses and other current liabilities483,833

485,567

Accrued trade discounts and rebates303,486

352,463

Long-term debt-current portion16,000

-

Total current liabilities854,043

875,740

LONG-TERM LIABILITIES:Long-term debt, net2,557,864

1,003,379

Deferred tax liabilities, net591,552

66,474

Other long-term liabilities155,015

101,672

Total long-term liabilities3,304,431

1,171,525

COMMITMENTS AND CONTINGENCIESSHAREHOLDERS' EQUITY:Ordinary shares, $0.0001 nominal value; 600,000,000 sharesauthorized at September 30, 2021 and December 31, 2020;227,026,047 and 221,721,674 shares issued at September 30, 2021and December 31, 2020, respectively; and 226,641,681 and 221,337,308 sharesoutstanding at September 30, 2021 and December 31, 2020, respectively22

22

Treasury stock, 384,366 ordinary shares at September 30, 2021 and December 31, 2020(4,585

)

(4,585

)

Additional paid-in capital4,310,886

4,245,945

Accumulated other comprehensive loss(1,532

)

(145

)

Retained earnings (accumulated deficit)145,423

(215,886

)

Total shareholders' equity4,450,214

4,025,351

Total liabilities and shareholders' equity$

8,608,688

$

6,072,616

Horizon Therapeutics plcCondensed Consolidated Balance Sheets (Unaudited)(in thousands, except share data) As of September 30, December 31, 2021 2020ASSETSCURRENT ASSETS:Cash and cash equivalents $ 1,068,547 $ 2,079,906

Restricted cash 3,839 3,573

Accounts receivable, net 775,371 659,701

Inventories, net 237,434 75,283

Prepaid expenses and other current assets 328,730 251,945

Total current assets 2,413,921 3,070,408

Property, plant and equipment, net 285,837 189,037

Developed technology and other intangible assets, 3,051,135 1,782,962 netIn-process research and development 880,000 -

Goodwill 1,069,031 413,669

Deferred tax assets, net 782,852 560,841

Other assets 125,912 55,699

Total assets $ 8,608,688 $ 6,072,616

LIABILITIES AND SHAREHOLDERS' EQUITYCURRENT LIABILITIES:Accounts payable $ 50,724 $ 37,710

Accrued expenses and other current liabilities 483,833 485,567

Accrued trade discounts and rebates 303,486 352,463

Long-term debt-current portion 16,000 -

Total current liabilities 854,043 875,740

LONG-TERM LIABILITIES:Long-term debt, net 2,557,864 1,003,379

Deferred tax liabilities, net 591,552 66,474

Other long-term liabilities 155,015 101,672

Total long-term liabilities 3,304,431 1,171,525

COMMITMENTS AND CONTINGENCIESSHAREHOLDERS' EQUITY:Ordinary shares, $0.0001 nominal value;600,000,000 sharesauthorized at September 30, 2021 and December 31,2020;227,026,047 and 221,721,674 shares issued atSeptember 30, 2021and December 31, 2020, respectively; and226,641,681 and 221,337,308 sharesoutstanding at September 30, 2021 and December 22 22 31, 2020, respectivelyTreasury stock, 384,366 ordinary shares at (4,585 ) (4,585 )September 30, 2021 and December 31, 2020Additional paid-in capital 4,310,886 4,245,945

Accumulated other comprehensive loss (1,532 ) (145 )

Retained earnings (accumulated deficit) 145,423 (215,886 )

Total shareholders' equity 4,450,214 4,025,351

Total liabilities and shareholders' equity $ 8,608,688 $ 6,072,616

Horizon Therapeutics plc

Condensed Consolidated Statements of Cash Flows (Unaudited)

(in thousands)

Three Months Ended September 30,

Nine Months Ended September 30,

2021

2020

2021

2020

CASH FLOWS FROM OPERATING ACTIVITIES:Net income$

326,543

$

292,840

$

361,309

$

199,239

Adjustments to reconcile net income to net cash provided by operating activities:Depreciation and amortization expense94,480

70,510

257,216

209,906

Equity-settled share-based compensation54,804

30,356

170,394

113,834

Acquired in-process research and development expense-

-

46,500

47,517

Loss on debt extinguishment-

14,602

-

31,856

Impairment of long-lived asset-

-

12,371

-

Amortization of debt discount and deferred financing costs1,500

1,208

3,740

12,025

Gain on sale of asset-

-

(2,000

)

-

Deferred income taxes(129,819

)

(3,480

)

(147,934

)

(8,041

)

Foreign exchange and other adjustments1,958

423

(1,494

)

1,084

Changes in operating assets and liabilities:Accounts receivable(39,762

)

(162,267

)

(107,776

)

(297,392

)

Inventories21,219

(10,986

)

(10,494

)

(23,329

)

Prepaid expenses and other current assets34,333

(62,816

)

(60,790

)

(83,226

)

Accounts payable(2,666

)

(65,846

)

7,640

17,709

Accrued trade discounts and rebates(2,825

)

34,170

(50,838

)

(143,551

)

Accrued expenses and other current liabilities59,021

(24,675

)

34,380

56,830

Other non-current assets and liabilities(7,746

)

(5,176

)

(15,510

)

11,410

Net cash provided by operating activities411,040

108,863

496,714

145,871

CASH FLOWS FROM INVESTING ACTIVITIES:Purchases of property, plant and equipment(27,440

)

(13,429

)

(59,695

)

(133,399

)

Payments for long-term investments, net(2,219

)

(8,937

)

(9,797

)

(8,937

)

Payments for acquisitions, net of cash acquired(67,945

)

-

(2,843,275

)

(262,305

)

Change in escrow deposit for property purchase-

-

-

6,000

Proceeds from sale of asset2,000

-

2,000

-

Payments related to license agreements(46,500

)

-

(46,500

)

-

Net cash used in investing activities(142,104

)

(22,366

)

(2,957,267

)

(398,641

)

CASH FLOWS FROM FINANCING ACTIVITIES:Repayment of senior notes-

(1,739

)

-

(1,739

)

Net proceeds from the issuance of ordinary shares-

919,995

-

919,995

Net proceeds from term loans-

-

1,574,993

-

Repayment of term loans(4,000

)

-

(8,000

)

-

Proceeds from the issuance of ordinary shares in conjunction with ESPP program-

-

11,482

7,979

Proceeds from the issuance of ordinary shares in connection with stock option exercises12,174

8,112

40,013

33,999

Payment of employee withholding taxes relating to share-based awards(16,429

)

(6,743

)

(158,077

)

(59,752

)

Net cash (used in) provided by financing activities(8,255

)

919,625

1,460,411

900,482

Effect of foreign exchange rate changes on cash, cash equivalents and restricted cash(4,452

)

1,166

(10,951

)

1,225

Net increase (decrease) in cash, cash equivalents and restricted cash256,229

1,007,288

(1,011,093

)

648,937

Cash, cash equivalents and restricted cash, beginning of the period(1)816,157

721,688

2,083,479

1,080,039

Cash, cash equivalents and restricted cash, end of the period(1)$

1,072,386

$

1,728,976

$

1,072,386

$

1,728,976

(1) Amounts include restricted cash balance in accordance with ASU No. 2016-18. Cash and cash equivalents excluding restricted cash are shown on the balance sheet.

Horizon Therapeutics plc

Condensed Consolidated Statements of Cash Flows (Unaudited)

(in thousands)

Three Months Ended September Nine Months Ended September 30, 30,

2021 2020 2021 2020

CASH FLOWS FROMOPERATINGACTIVITIES:Net income $ 326,543 $ 292,840 $ 361,309 $ 199,239

Adjustments toreconcile netincome to netcash providedby operatingactivities:Depreciationand 94,480 70,510 257,216 209,906 amortizationexpenseEquity-settled 54,804 30,356 170,394 113,834 share-basedcompensationAcquiredin-process - - 46,500 47,517 research anddevelopmentexpenseLoss on debt - 14,602 - 31,856 extinguishmentImpairment of - - 12,371 - long-livedassetAmortization ofdebt discount 1,500 1,208 3,740 12,025 and deferredfinancing costsGain on sale of - - (2,000 ) - assetDeferred income (129,819 ) (3,480 ) (147,934 ) (8,041 )taxesForeignexchange and 1,958 423 (1,494 ) 1,084 otheradjustmentsChanges inoperatingassets andliabilities:Accounts (39,762 ) (162,267 ) (107,776 ) (297,392 )receivableInventories 21,219 (10,986 ) (10,494 ) (23,329 )

Prepaidexpenses and 34,333 (62,816 ) (60,790 ) (83,226 )other currentassetsAccounts (2,666 ) (65,846 ) 7,640 17,709 payableAccrued trade (2,825 ) 34,170 (50,838 ) (143,551 )discounts andrebatesAccruedexpenses and 59,021 (24,675 ) 34,380 56,830 other currentliabilitiesOthernon-current (7,746 ) (5,176 ) (15,510 ) 11,410 assets andliabilitiesNet cashprovided by 411,040 108,863 496,714 145,871 operatingactivitiesCASH FLOWS FROMINVESTINGACTIVITIES:Purchases of (27,440 ) (13,429 ) (59,695 ) (133,399 )property, plantand equipmentPayments forlong-term (2,219 ) (8,937 ) (9,797 ) (8,937 )investments,netPayments foracquisitions, (67,945 ) - (2,843,275 ) (262,305 )net of cashacquiredChange inescrow deposit - - - 6,000 for propertypurchaseProceeds from 2,000 - 2,000 - sale of assetPaymentsrelated to (46,500 ) - (46,500 ) - licenseagreementsNet cash used (142,104 ) (22,366 ) (2,957,267 ) (398,641 )in investingactivitiesCASH FLOWS FROMFINANCINGACTIVITIES:Repayment of - (1,739 ) - (1,739 )senior notesNet proceedsfrom the - 919,995 - 919,995 issuance ofordinary sharesNet proceeds - - 1,574,993 - from term loansRepayment of (4,000 ) - (8,000 ) - term loansProceeds fromthe issuance ofordinary shares - - 11,482 7,979 in conjunctionwith ESPPprogramProceeds fromthe issuance ofordinary shares 12,174 8,112 40,013 33,999 in connectionwith stockoptionexercisesPayment ofemployeewithholding (16,429 ) (6,743 ) (158,077 ) (59,752 )taxes relatingto share-basedawardsNet cash (usedin) provided by (8,255 ) 919,625 1,460,411 900,482 financingactivities Effect offoreignexchange rate (4,452 ) 1,166 (10,951 ) 1,225 changes oncash, cashequivalents andrestricted cash Net increase(decrease) in 256,229 1,007,288 (1,011,093 ) 648,937 cash, cashequivalents andrestricted cashCash, cashequivalents andrestricted 816,157 721,688 2,083,479 1,080,039 cash, beginningof the period^(1)Cash, cashequivalents and $ 1,072,386 $ 1,728,976 $ 1,072,386 $ 1,728,976 restrictedcash, end ofthe period^(1) ^(1) Amounts include restricted cash balance in accordance with ASU No.2016-18. Cash and cash equivalents excluding restricted cash are shown on thebalance sheet.

Horizon Therapeutics plcGAAP to Non-GAAP ReconciliationsNet Income and Earnings Per Share (Unaudited)(in thousands, except share and per share data)Three Months Ended September 30,

Nine Months Ended September 30,

2021

2020

2021

2020

GAAP net income$

326,543

$

292,840

$

361,309

$

199,239

Non-GAAP adjustments:Acquisition/divestiture-related costs9,228

199

88,166

47,296

Restructuring and realignment costs680

-

7,703

-

Manufacturing plant start-up costs1,712

-

1,712

-

Amortization and step-up:Intangible amortization expense90,368

65,353

245,260

190,677

Inventory step-up expense8,912

-

16,914

-

Amortization of debt discount and deferred financing costs1,500

1,208

3,740

12,025

Impairment of long-lived assets-

-

12,371

1,072

Gain on sale of asset-

-

(2,000

)

-

Share-based compensation54,804

30,356

170,394

113,834

Depreciation4,112

5,157

11,956

19,229

Litigation settlement5,000

-

5,000

-

Upfront, progress and milestone payments related tolicense and collaboration agreements4,000

-

53,500

3,000

Fees related to refinancing activities-

-

-

54

Loss on debt extinguishment-

14,602

-

31,856

Drug substance harmonization costs-

193

-

483

Total of pre-tax non-GAAP adjustments180,316

117,068

614,716

419,526

Income tax effect of pre-tax non-GAAP adjustments(37,102

)

(23,063

)

(148,353

)

(80,122

)

Other non-GAAP income tax adjustments(56,007

)

5,331

(25,126

)

20,541

Total of non-GAAP adjustments87,207

99,336

441,237

359,945

Non-GAAP net income$

413,750

$

392,176

$

802,546

$

559,184

Non-GAAP Earnings Per Share:Weighted average ordinary shares - Basic226,096,747

212,320,219

225,053,704

198,413,779

Non-GAAP Earnings Per Share - Basic:GAAP earnings per share - Basic$

1.44

$

1.38

$

1.61

$

1.00

Non-GAAP adjustments0.39

0.47

1.96

1.82

Non-GAAP earnings per share - Basic$

1.83

$

1.85

$

3.57

$

2.82

Non-GAAP net income$

413,750

$

392,176

$

802,546

$

559,184

Effect of assumed exchange of Exchangeable Senior Notes, net of tax-

223

-

3,789

Numerator - non-GAAP net income$

413,750

$

392,399

$

802,546

$

562,973

Weighted average ordinary shares - DilutedWeighted average ordinary shares - Basic226,096,747

212,320,219

225,053,704

198,413,779

Ordinary share equivalents10,102,042

12,959,618

10,202,720

19,431,212

Denominator - weighted average ordinary shares - Diluted236,198,789

225,279,837

235,256,424

217,844,991

Non-GAAP Earnings Per Share - DilutedGAAP earnings per share - Diluted$

1.38

$

1.31

$

1.54

$

0.95

Non-GAAP adjustments0.37

0.43

1.87

1.63

Non-GAAP earnings per share - Diluted$

1.75

$

1.74

$

3.41

$

2.58

Horizon Therapeutics plcGAAP to Non-GAAP ReconciliationsNet Income and Earnings Per Share (Unaudited)(in thousands, except share and per share data) Three Months Ended September 30, Nine Months Ended September 30,

2021 2020 2021 2020

GAAP net income $ 326,543 $ 292,840 $ 361,309 $ 199,239

Non-GAAPadjustments:Acquisition/ 9,228 199 88,166 47,296 divestiture-relatedcostsRestructuring and 680 - 7,703 - realignment costsManufacturing plant 1,712 - 1,712 - start-up costsAmortization andstep-up:Intangible 90,368 65,353 245,260 190,677 amortizationexpenseInventory step-up 8,912 - 16,914 - expenseAmortization ofdebt discount and 1,500 1,208 3,740 12,025 deferred financingcostsImpairment of - - 12,371 1,072 long-lived assetsGain on sale of - - (2,000 ) - assetShare-based 54,804 30,356 170,394 113,834 compensationDepreciation 4,112 5,157 11,956 19,229

Litigation 5,000 - 5,000 - settlementUpfront, progressand milestonepayments related tolicense and 4,000 - 53,500 3,000 collaborationagreementsFees related to - - - 54 refinancingactivitiesLoss on debt - 14,602 - 31,856 extinguishmentDrug substance - 193 - 483 harmonization costsTotal of pre-tax 180,316 117,068 614,716 419,526 non-GAAPadjustmentsIncome tax effect (37,102 ) (23,063 ) (148,353 ) (80,122 )of pre-tax non-GAAPadjustmentsOther non-GAAP (56,007 ) 5,331 (25,126 ) 20,541 income taxadjustmentsTotal of non-GAAP 87,207 99,336 441,237 359,945 adjustmentsNon-GAAP net income $ 413,750 $ 392,176 $ 802,546 $ 559,184

Non-GAAP EarningsPer Share: Weighted average 226,096,747 212,320,219 225,053,704 198,413,779 ordinary shares -Basic Non-GAAP EarningsPer Share - Basic:GAAP earnings per $ 1.44 $ 1.38 $ 1.61 $ 1.00 share - BasicNon-GAAP 0.39 0.47 1.96 1.82 adjustmentsNon-GAAP earnings $ 1.83 $ 1.85 $ 3.57 $ 2.82 per share - Basic Non-GAAP net income $ 413,750 $ 392,176 $ 802,546 $ 559,184

Effect of assumedexchange of - 223 - 3,789 Exchangeable SeniorNotes, net of taxNumerator - $ 413,750 $ 392,399 $ 802,546 $ 562,973 non-GAAP net income Weighted averageordinary shares -DilutedWeighted average 226,096,747 212,320,219 225,053,704 198,413,779 ordinary shares -BasicOrdinary share 10,102,042 12,959,618 10,202,720 19,431,212 equivalentsDenominator -weighted average 236,198,789 225,279,837 235,256,424 217,844,991 ordinary shares -Diluted Non-GAAP EarningsPer Share - DilutedGAAP earnings per $ 1.38 $ 1.31 $ 1.54 $ 0.95 share - DilutedNon-GAAP 0.37 0.43 1.87 1.63 adjustmentsNon-GAAP earnings $ 1.75 $ 1.74 $ 3.41 $ 2.58 per share - DilutedHorizon Therapeutics plcGAAP to Non-GAAP ReconciliationsEBITDA and Adjusted EBITDA (Unaudited)

(in thousands)Three Months Ended September 30,

Nine Months Ended September 30,

2021

2020

2021

2020

GAAP net income$

326,543

$

292,840

$

361,309

$

199,239

Depreciation4,112

5,157

11,956

19,229

Amortization and step-up:Intangible amortization expense

90,368

65,353

245,260

190,677

Inventory step-up expense

8,912

-

16,914

-

Interest expense, net (including amortization ofdebt discount and deferred financing costs)

22,977

12,185

59,018

48,100

Benefit for income taxes(19,302

)

(91,081

)

(109,537

)

(27,143

)

EBITDA$

433,610

$

284,454

$

584,920

$

430,102

Other non-GAAP adjustments:Acquisition/divestiture-related costs9,228

199

88,166

47,296

Restructuring and realignment costs680

-

7,703

-

Manufacturing plant start-up costs1,712

-

1,712

-

Impairment of long-lived assets-

-

12,371

1,072

Gain on sale of asset-

-

(2,000

)

-

Share-based compensation54,804

30,356

170,394

113,834

Litigation settlement5,000

-

5,000

-

Upfront, progress and milestone payments related tolicense and collaboration agreements4,000

-

53,500

3,000

Fees related to refinancing activities-

-

-

54

Loss on debt extinguishment-

14,602

-

31,856

Drug substance harmonization costs-

193

-

483

Total of other non-GAAP adjustments75,424

45,350

336,846

197,595

Adjusted EBITDA$

509,034

$

329,804

$

921,766

$

627,697

Horizon Therapeutics plcGAAP to Non-GAAP ReconciliationsEBITDA and Adjusted EBITDA (Unaudited)

(in thousands) Three Months Ended Nine Months Ended September 30, September 30,

2021 2020 2021 2020

GAAP net income $ 326,543 $ 292,840 $ 361,309 $ 199,239

Depreciation 4,112 5,157 11,956 19,229

Amortization andstep-up:Intangible amortization 90,368 65,353 245,260 190,677 expense

Inventory step-up 8,912 - 16,914 - expense

Interest expense, net(including amortizationofdebt discount anddeferred financing 22,977 12,185 59,018 48,100 costs)

Benefit for income taxes (19,302 ) (91,081 ) (109,537 ) (27,143 )

EBITDA $ 433,610 $ 284,454 $ 584,920 $ 430,102

Other non-GAAPadjustments:Acquisition/ 9,228 199 88,166 47,296 divestiture-relatedcostsRestructuring and 680 - 7,703 - realignment costsManufacturing plant 1,712 - 1,712 - start-up costsImpairment of long-lived - - 12,371 1,072 assetsGain on sale of asset - - (2,000 ) -

Share-based compensation 54,804 30,356 170,394 113,834

Litigation settlement 5,000 - 5,000 -

Upfront, progress andmilestone paymentsrelated tolicense and 4,000 - 53,500 3,000 collaboration agreementsFees related to - - - 54 refinancing activitiesLoss on debt - 14,602 - 31,856 extinguishmentDrug substance - 193 - 483 harmonization costsTotal of other non-GAAP 75,424 45,350 336,846 197,595 adjustmentsAdjusted EBITDA $ 509,034 $ 329,804 $ 921,766 $ 627,697

Horizon Therapeutics plc

GAAP to Non-GAAP Reconciliations

Operating Income (Unaudited)

(in thousands)Three Months Ended September 30,

Nine Months Ended September 30,

2021

2020

2021

2020

GAAP operating income$

331,543

$

228,582

$

310,040

$

249,955

Non-GAAP adjustments:Acquisition/divestiture-related costs9,224

144

89,241

47,416

Restructuring and realignment costs680

-

7,703

-

Manufacturing plant start-up costs1,712

-

1,712

-

Amortization and step-up:Intangible amortization expense90,368

65,353

245,260

190,677

Inventory step-up expense8,912

-

16,914

-

Impairment of long-lived assets-

-

12,371

1,072

Gain on sale of asset-

-

(2,000

)

-

Share-based compensation54,804

30,356

170,394

113,834

Depreciation4,111

5,157

11,955

19,229

Litigation settlement5,000

-

5,000

-

Upfront, progress and milestone payments related tolicense and collaboration agreements4,000

-

53,500

3,000

Fees related to refinancing activities-

-

-

54

Drug substance harmonization costs-

193

-

483

Total of non-GAAP adjustments178,811

101,203

612,050

375,765

Non-GAAP operating income$

510,354

$

329,785

$

922,090

$

625,720

Orphan segment operating income476,225

274,687

798,514

480,584

Inflammation segment operating income34,129

55,098

123,576

145,136

Total segment operating income$

510,354

$

329,785

$

922,090

$

625,720

Foreign exchange (loss) gain(476

)

(753

)

(1,363

)

306

Other (expense) income, net(844

)

772

1,039

1,671

Adjusted EBITDA$

509,034

$

329,804

$

921,766

$

627,697

Horizon Therapeutics plc

GAAP to Non-GAAP Reconciliations

Operating Income (Unaudited)

(in thousands) Three Months Ended Nine Months Ended September 30, September 30,

2021 2020 2021 2020



GAAP operating income $ 331,543 $ 228,582 $ 310,040 $ 249,955

Non-GAAP adjustments:Acquisition/ 9,224 144 89,241 47,416divestiture-related costsRestructuring and 680 - 7,703 -realignment costsManufacturing plant 1,712 - 1,712 -start-up costsAmortization and step-up:Intangible amortization 90,368 65,353 245,260 190,677expenseInventory step-up expense 8,912 - 16,914 -

Impairment of long-lived - - 12,371 1,072assetsGain on sale of asset - - (2,000 ) -

Share-based compensation 54,804 30,356 170,394 113,834

Depreciation 4,111 5,157 11,955 19,229

Litigation settlement 5,000 - 5,000 -

Upfront, progress andmilestone payments relatedtolicense and collaboration 4,000 - 53,500 3,000agreementsFees related to refinancing - - - 54activitiesDrug substance - 193 - 483harmonization costsTotal of non-GAAP 178,811 101,203 612,050 375,765adjustmentsNon-GAAP operating income $ 510,354 $ 329,785 $ 922,090 $ 625,720

Orphan segment operating 476,225 274,687 798,514 480,584incomeInflammation segment 34,129 55,098 123,576 145,136operating incomeTotal segment operating $ 510,354 $ 329,785 $ 922,090 $ 625,720income Foreign exchange (loss) (476 ) (753 ) (1,363 ) 306gainOther (expense) income, net (844 ) 772 1,039 1,671

Adjusted EBITDA $ 509,034 $ 329,804 $ 921,766 $ 627,697

Horizon Therapeutics plc

GAAP to Non-GAAP Reconciliations

Gross Profit and Operating Cash Flow (Unaudited)

(in thousands, except percentages)

Three Months Ended September 30,

Nine Months Ended September 30,

2021

2020

2021

2020

Non-GAAP Gross Profit:GAAP gross profit$

785,352

$

484,952

$

1,658,943

$

1,084,709

Non-GAAP gross profit adjustments:Acquisition/divestiture-related costs(204

)

-

(75

)

-

Intangible amortization expense89,892

65,149

244,382

190,070

Inventory step-up expense8,912

-

16,914

-

Share-based compensation1,795

1,566

6,875

5,543

Depreciation55

17

227

435

Drug substance harmonization costs-

193

-

483

Total of Non-GAAP adjustments100,450

66,925

268,323

196,531

Non-GAAP gross profit$

885,802

$

551,877

$

1,927,266

$

1,281,240

GAAP gross profit %75.7

%

76.2

%

75.0

%

74.5

%

Non-GAAP gross profit %85.4

%

86.7

%

87.1

%

88.1

%

GAAP cash provided by operating activities$

411,040

$

108,863

$

496,714

$

145,871

Cash payments for acquisition/divestiture-related costs15,839

97

136,073

80

Cash payments for restructuring and realignment costs583

-

1,803

189

Cash payments for manufacturing start-up costs869

-

869

-

Cash payments for upfront, progress and milestone payments related tolicense and collaboration agreement4,000

-

7,000

-

Cash payments drug substance harmonization costs-

-

-

290

Cash payments relating to refinancing activities-

-

-

73

Non-GAAP operating cash flow$

432,331

$

108,960

$

642,459

$

146,503

Horizon Therapeutics plc

GAAP to Non-GAAP Reconciliations

Gross Profit and Operating Cash Flow (Unaudited)

(in thousands, except percentages)

Three Months Ended Nine Months Ended September September 30, 30,

2021 2020 2021 2020

Non-GAAP GrossProfit: GAAP gross profit $ 785,352 $ 484,952 $ 1,658,943 $ 1,084,709

Non-GAAP grossprofit adjustments:Acquisition/ (204 ) - (75 ) - divestiture-relatedcostsIntangible 89,892 65,149 244,382 190,070 amortization expenseInventory step-up 8,912 - 16,914 - expenseShare-based 1,795 1,566 6,875 5,543 compensationDepreciation 55 17 227 435

Drug substance - 193 - 483 harmonization costsTotal of Non-GAAP 100,450 66,925 268,323 196,531 adjustmentsNon-GAAP gross $ 885,802 $ 551,877 $ 1,927,266 $ 1,281,240 profit GAAP gross profit % 75.7 % 76.2 % 75.0 % 74.5 %

Non-GAAP gross 85.4 % 86.7 % 87.1 % 88.1 %profit % GAAP cash provided $ 411,040 $ 108,863 $ 496,714 $ 145,871 by operatingactivitiesCash payments foracquisition/ 15,839 97 136,073 80 divestiture-relatedcostsCash payments for 583 - 1,803 189 restructuring andrealignment costsCash payments for 869 - 869 - manufacturingstart-up costsCash payments forupfront, progressand milestonepayments related tolicense and 4,000 - 7,000 - collaborationagreementCash payments drug - - - 290 substanceharmonization costsCash paymentsrelating to - - - 73 refinancingactivitiesNon-GAAP operating $ 432,331 $ 108,960 $ 642,459 $ 146,503 cash flowHorizon Therapeutics plc

GAAP to Non-GAAP Reconciliations

EBITDA (Unaudited) - 2020

(in thousands)

Twelve Months Ended December 31,

2020

GAAP net income$

389,796

Depreciation24,303

Amortization and step-up:Intangible amortization expense255,148

Inventory step-up expense-

Interest expense, net (including amortization ofdebt discount and deferred financing costs)59,616

Expense for income taxes11,849

EBITDA$

740,712

Other non-GAAP adjustments:Acquisition/divestiture-related costs49,196

Restructuring and realignment costs(141

)

Impairment of long-lived assets1,713

Gain on sale of assets(4,883

)

Share-based compensation146,627

Upfront, progress and milestone payments related tolicense and collaboration agreements33,000

Fees related to refinancing activities54

Loss on debt extinguishment31,856

Drug substance harmonization costs542

Total of other non-GAAP adjustments257,964

Adjusted EBITDA$

998,676

Horizon Therapeutics plc

GAAP to Non-GAAP Reconciliations

EBITDA (Unaudited) - 2020

(in thousands)

Twelve Months Ended December 31,

2020

GAAP net income $ 389,796

Depreciation 24,303

Amortization and step-up: Intangible amortization expense 255,148

Inventory step-up expense -

Interest expense, net (including amortization of debt discount and deferred financing costs) 59,616

Expense for income taxes 11,849

EBITDA $ 740,712

Other non-GAAP adjustments: Acquisition/divestiture-related costs 49,196

Restructuring and realignment costs (141 )

Impairment of long-lived assets 1,713

Gain on sale of assets (4,883 )

Share-based compensation 146,627

Upfront, progress and milestone payments related to license and collaboration agreements 33,000

Fees related to refinancing activities 54

Loss on debt extinguishment 31,856

Drug substance harmonization costs 542

Total of other non-GAAP adjustments 257,964

Adjusted EBITDA $ 998,676

Horizon Therapeutics plc

GAAP to Non-GAAP Tax Rate Reconciliation (Unaudited)

(in millions, except percentages and per share amounts)

Q3 2021Pre-tax Net(Loss) IncomeIncome Tax(Benefit) ExpenseTax RateNet Income(Loss)Diluted Earnings(Loss) Per ShareAs reported - GAAP$

307.2

$

(19.3

)

(6.3

)%

$

326.5

$

1.38

Non-GAAP adjustments180.3

93.1

87.2

Non-GAAP$

487.6

$

73.8

15.1

%

$

413.8

$

1.75

Q3 2020Pre-tax Net(Loss) IncomeIncome Tax(Benefit) ExpenseTax RateNet Income(Loss)Diluted Earnings(Loss) Per ShareAs reported - GAAP$

201.8

$

(91.1

)

(45.1

)%

$

292.8

$

1.31

Non-GAAP adjustments117.1

17.7

99.3

Non-GAAP$

318.8

$

(73.3

)

(23.0

)%

$

392.2

$

1.74

YTD 2021Pre-tax Net(Loss) IncomeIncome Tax(Benefit) ExpenseTax RateNet Income(Loss)Diluted Earnings(Loss) Per ShareAs reported - GAAP$

251.8

$

(109.5

)

(43.5

)%

$

361.3

$

1.54

Non-GAAP adjustments614.7

173.5

441.2

Non-GAAP$

866.5

$

64.0

7.4

%

$

802.5

$

3.41

YTD 2020Pre-tax Net(Loss) IncomeIncome Tax(Benefit) ExpenseTax RateNet Income(Loss)Diluted Earnings(Loss) Per ShareAs reported - GAAP$

172.1

$

(27.1

)

(15.8

)%

$

199.2

$

0.95

Non-GAAP adjustments419.5

59.6

359.9

Non-GAAP$

591.6

$

32.4

5.5

%

$

559.2

$

2.58

Horizon Therapeutics plc

GAAP to Non-GAAP Tax Rate Reconciliation (Unaudited)

(in millions, except percentages and per share amounts)

Q3 2021 Pre-tax Net Income Tax Net Diluted (Loss) (Benefit) Tax Rate Income Earnings Income Expense (Loss) (Loss) Per ShareAs reported - $ 307.2 $ (19.3 ) (6.3 )% $ 326.5 $ 1.38GAAPNon-GAAP 180.3 93.1 87.2adjustmentsNon-GAAP $ 487.6 $ 73.8 15.1 % $ 413.8 $ 1.75

Q3 2020 Pre-tax Net Income Tax Net Diluted (Loss) (Benefit) Tax Rate Income Earnings Income Expense (Loss) (Loss) Per ShareAs reported - $ 201.8 $ (91.1 ) (45.1 )% $ 292.8 $ 1.31GAAPNon-GAAP 117.1 17.7 99.3adjustmentsNon-GAAP $ 318.8 $ (73.3 ) (23.0 )% $ 392.2 $ 1.74

YTD 2021 Pre-tax Net Income Tax Net Diluted (Loss) (Benefit) Tax Rate Income Earnings Income Expense (Loss) (Loss) Per ShareAs reported - $ 251.8 $ (109.5 ) (43.5 )% $ 361.3 $ 1.54GAAPNon-GAAP 614.7 173.5 441.2adjustmentsNon-GAAP $ 866.5 $ 64.0 7.4 % $ 802.5 $ 3.41

YTD 2020 Pre-tax Net Income Tax Net Diluted (Loss) (Benefit) Tax Rate Income Earnings Income Expense (Loss) (Loss) Per ShareAs reported - $ 172.1 $ (27.1 ) (15.8 )% $ 199.2 $ 0.95GAAPNon-GAAP 419.5 59.6 359.9adjustmentsNon-GAAP $ 591.6 $ 32.4 5.5 % $ 559.2 $ 2.58

Horizon Therapeutics plc

Certain Income Statement Line Items - Non-GAAP Adjusted

For the Three Months Ended September 30, 2021 (Unaudited)

(in thousands)

Income TaxResearch &Selling, GeneralInterestOtherBenefitCOGSDevelopment& AdministrativeExpenseExpense, net(Expense)GAAP as reported$

(251,640

)

$

(93,549

)

$

(360,260

)

$

(22,977

)

$

(849

)

$

19,302

Non-GAAP Adjustments:Acquisition/divestiture-related costs(1)(204

)

15

9,415

-

2

-

Restructuring and realignment costs(2)-

-

680

-

-

-

Manufacturing plant start-up costs(3)-

-

1,712

-

-

-

Amortization and step-up:Intangible amortization expense(4)89,892

-

476

-

-

-

Inventory step-up expense(5)8,912

-

-

-

-

-

Amortization of debt discount and deferred financing costs(6)-

-

-

1,500

-

-

Share-based compensation(7)1,795

15,075

37,934

-

-

-

Depreciation(8)55

125

3,932

-

-

-

Litigation settlement(9)-

-

5,000

-

-

-

Upfront, progress and milestone payments related to licenseand collaboration agreements(10)-

4,000

-

-

-

-

Income tax effect on pre-tax non-GAAP adjustments(11)-

-

-

-

-

(37,102

)

Other non-GAAP income tax adjustments(12)-

-

-

-

-

(56,007

)

Total of non-GAAP adjustments100,450

19,215

59,149

1,500

2

(93,109

)

Non-GAAP$

(151,190

)

$

(74,334

)

$

(301,111

)

$

(21,477

)

$

(847

)

$

(73,807

)

Horizon Therapeutics plc

Certain Income Statement Line Items - Non-GAAP Adjusted

For the Three Months Ended September 30, 2020 (Unaudited)

(in thousands)

Income TaxResearch &Selling, GeneralLoss on DebtInterestOtherBenefitCOGSDevelopment& AdministrativeExtinguishmentExpenseIncome, net(Expense)GAAP as reported$

(151,475

)

$

(30,206

)

$

(226,164

)

$

(14,602

)

$

(12,185

)

$

717

$

91,081

Non-GAAP Adjustments:Acquisition/divestiture-related costs(1)-

36

108

-

-

55

-

Amortization and step-up:Intangible amortization expense(4)65,149

-

204

-

-

-

-

Amortization of debt discount and deferred financing costs(6)-

-

-

-

1,208

-

-

Share-based compensation(7)1,566

2,453

26,337

-

-

-

-

Depreciation(8)17

29

5,111

-

-

-

-

Loss on debt extinguishment(13)-

-

-

14,602

-

-

-

Drug substance harmonization costs(14)193

-

-

-

-

-

-

Income tax effect on pre-tax non-GAAP adjustments(11)-

-

-

-

-

-

(23,063

)

Other non-GAAP income tax adjustments(12)-

-

-

-

-

-

5,331

Total of non-GAAP adjustments66,925

2,518

31,760

14,602

1,208

55

(17,732

)

Non-GAAP$

(84,550

)

$

(27,688

)

$

(194,404

)

$

-

$

(10,977

)

$

772

$

73,349

Horizon Therapeutics plc

Certain Income Statement Line Items - Non-GAAP Adjusted

For the Three Months Ended September 30, 2021 (Unaudited)

(in thousands)

Income Tax Research & Selling, Interest Other Benefit General COGS Development & Expense Expense, (Expense) Administrative net GAAP as reported $ (251,640 ) $ (93,549 ) $ (360,260 ) $ (22,977 ) $ (849 ) $ 19,302

Non-GAAPAdjustments: Acquisition/ (204 ) 15 9,415 - 2 - divestiture-relatedcosts^(1)Restructuring and - - 680 - - - realignment costs^(2)Manufacturing plant - - 1,712 - - - start-up costs^(3)Amortization andstep-up:Intangible 89,892 - 476 - - - amortizationexpense^(4)Inventory step-up 8,912 - - - - - expense^(5)Amortization ofdebt discount and - - - 1,500 - - deferred financingcosts^(6)Share-based 1,795 15,075 37,934 - - - compensation^(7)Depreciation^(8) 55 125 3,932 - - -

Litigation - - 5,000 - - - settlement^(9)Upfront, progressand milestonepayments related tolicenseand collaboration - 4,000 - - - - agreements^(10)Income tax effect - - - - - (37,102 )on pre-tax non-GAAPadjustments^(11)Other non-GAAP - - - - - (56,007 )income taxadjustments^(12)Total of non-GAAP 100,450 19,215 59,149 1,500 2 (93,109 )adjustments Non-GAAP $ (151,190 ) $ (74,334 ) $ (301,111 ) $ (21,477 ) $ (847 ) $ (73,807 )

Horizon Therapeutics plc

Certain Income Statement Line Items - Non-GAAP Adjusted

For the Three Months Ended September 30, 2020 (Unaudited)

(in thousands)

Income Tax Research & Selling, Loss on Debt Interest Other Benefit General COGS Development & Extinguishment Expense Income, net (Expense) Administrative GAAP as reported $ (151,475 ) $ (30,206 ) $ (226,164 ) $ (14,602 ) $ (12,185 ) $ 717 $ 91,081

Non-GAAPAdjustments: Acquisition/ - 36 108 - - 55 - divestiture-relatedcosts^(1)Amortization andstep-up:Intangible 65,149 - 204 - - - - amortizationexpense^(4)Amortization ofdebt discount and - - - - 1,208 - - deferred financingcosts^(6)Share-based 1,566 2,453 26,337 - - - - compensation^(7)Depreciation^(8) 17 29 5,111 - - - -

Loss on debt - - - 14,602 - - - extinguishment^(13)Drug substance 193 - - - - - - harmonization costs^(14)Income tax effect - - - - - - (23,063 )on pre-tax non-GAAPadjustments^(11)Other non-GAAP - - - - - - 5,331 income taxadjustments^(12)Total of non-GAAP 66,925 2,518 31,760 14,602 1,208 55 (17,732 )adjustments Non-GAAP $ (84,550 ) $ (27,688 ) $ (194,404 ) $ - $ (10,977 ) $ 772 $ 73,349

Horizon Therapeutics plcCertain Income Statement Line Items - Non-GAAP AdjustedFor the Nine Months Ended September 30, 2021 (Unaudited)(in thousands)Income TaxResearch &Selling, GeneralGain onImpairment ofInterestOther IncomeBenefitCOGSDevelopment& AdministrativeSale of AssetLong-lived assetsExpense(Expense), net(Expense)GAAP as reported$

(553,003

)

$

(291,076

)

$

(1,047,456

)

$

2,000

$

(12,371

)

$

(59,018

)

$

2,113

$

109,537

Non-GAAP Adjustments:Acquisition/divestiture-related costs(1)(75

)

18

89,300

-

-

-

(1,077

)

-

Restructuring and realignment costs(2)-

-

7,703

-

-

-

-

-

Manufacturing plant start-up costs(3)-

-

1,712

-

-

-

-

-

Amortization and step-up:Intangible amortization expense(4)244,382

-

878

-

-

-

-

-

Inventory step-up expense(5)16,914

-

-

-

-

-

-

-

Amortization of debt discount and deferred financing costs(6)-

-

-

-

-

3,740

-

-

Impairment of long lived assets(15)-

-

-

-

12,371

-

-

-

Gain on sale of asset(16)-

-

-

(2,000

)

-

-

-

-

Share-based compensation(7)6,875

32,851

130,668

-

-

-

-

-

Depreciation(8)227

291

11,438

-

-

-

-

-

Litigation settlement(9)-

-

5,000

-

-

-

-

-

Upfront, progress and milestone payments related to licenseand collaboration agreements(10)-

53,500

-

-

-

-

-

-

Income tax effect on pre-tax non-GAAP adjustments(11)-

-

-

-

-

-

-

(148,353

)

Other non-GAAP income tax adjustments(12)-

-

-

-

-

-

-

(25,126

)

Total of non-GAAP adjustments268,323

86,660

246,699

(2,000

)

12,371

3,740

(1,077

)

(173,479

)

Non-GAAP$

(284,680

)

$

(204,416

)

$

(800,757

)

$

-

$

-

$

(55,278

)

$

1,036

$

(63,942

)

Horizon Therapeutics plcCertain Income Statement Line Items - Non-GAAP AdjustedFor the Nine Months Ended September 30, 2020 (Unaudited)(in thousands)Income TaxResearch &Selling, GeneralLoss on DebtInterestOther IncomeBenefitCOGSDevelopment& AdministrativeExtinguishmentExpense(Expense), net(Expense)GAAP as reported$

(370,406

)

$

(138,483

)

$

(696,271

)

$

(31,856

)

$

(48,100

)

1,791

$

27,143

Non-GAAP Adjustments:Acquisition/divestiture-related costs(1)-

47,365

51

-

-

(120

)

-

Amortization and step-up:Intangible amortization expense(4)190,070

-

607

-

-

-

-

Amortization of debt discount and deferred financing costs(6)-

-

-

-

12,025

-

Impairment of long lived assets(15)-

-

1,072

-

-

-

-

Share-based compensation(7)5,543

11,381

96,910

-

-

-

-

Depreciation(8)435

72

18,722

-

-

-

-

Upfront, progress and milestone payments related to licenseand collaboration agreements(10)-

3,000

-

-

-

-

-

Fees related to refinancing activities(17)-

-

54

-

-

-

-

Loss on debt extinguishment(13)-

-

-

31,856

-

-

-

Drug substance harmonization costs(14)483

-

-

-

-

-

-

Income tax effect on pre-tax non-GAAP adjustments(11)-

-

-

-

-

-

(80,122

)

Other non-GAAP income tax adjustments(12)-

-

-

-

-

-

20,541

Total of non-GAAP adjustments196,531

61,818

117,416

31,856

12,025

(120

)

(59,581

)

Non-GAAP$

(173,875

)

$

(76,665

)

$

(578,855

)

-

$

(36,075

)

$

1,671

$

(32,438

)

Horizon Therapeutics plc Certain Income Statement Line Items - Non-GAAP Adjusted For the Nine Months Ended September 30, 2021 (Unaudited) (in thousands) Income Tax Research & Selling, Gain on Impairment Interest Other Benefit General of Income COGS Development & Sale of Asset Long-lived Expense (Expense), (Expense) Administrative assets net GAAP as reported $ (553,003 ) $ (291,076 ) $ (1,047,456 ) $ 2,000 $ (12,371 ) $ (59,018 ) $ 2,113 $ 109,537

Non-GAAPAdjustments: Acquisition/ (75 ) 18 89,300 - - - (1,077 ) - divestiture-relatedcosts^(1)Restructuring and - - 7,703 - - - - - realignment costs^(2)Manufacturing plant - - 1,712 - - - - - start-up costs^(3)Amortization andstep-up:Intangible 244,382 - 878 - - - - - amortizationexpense^(4)Inventory step-up 16,914 - - - - - - - expense^(5)Amortization ofdebt discount and - - - - - 3,740 - - deferred financingcosts^(6)Impairment of long - - - - 12,371 - - - lived assets^(15)Gain on sale of - - - (2,000 ) - - - - asset^(16)Share-based 6,875 32,851 130,668 - - - - - compensation^(7)Depreciation^(8) 227 291 11,438 - - - - -

Litigation - - 5,000 - - - - - settlement^(9)Upfront, progressand milestonepayments related tolicenseand collaboration - 53,500 - - - - - - agreements^(10)Income tax effect - - - - - - - (148,353 )on pre-tax non-GAAPadjustments^(11)Other non-GAAP - - - - - - - (25,126 )income taxadjustments^(12)Total of non-GAAP 268,323 86,660 246,699 (2,000 ) 12,371 3,740 (1,077 ) (173,479 )adjustments Non-GAAP $ (284,680 ) $ (204,416 ) $ (800,757 ) $ - $ - $ (55,278 ) $ 1,036 $ (63,942 )

Horizon Therapeutics plc Certain Income Statement Line Items - Non-GAAP Adjusted For the Nine Months Ended September 30, 2020 (Unaudited) (in thousands) Income Tax Research & Selling, Loss on Debt Interest Other Benefit General Income COGS Development & Extinguishment Expense (Expense), (Expense) Administrative net GAAP as reported $ (370,406 ) $ (138,483 ) $ (696,271 ) $ (31,856 ) $ (48,100 ) 1,791 $ 27,143

Non-GAAPAdjustments: Acquisition/ - 47,365 51 - - (120 ) - divestiture-relatedcosts^(1)Amortization andstep-up:Intangible 190,070 - 607 - - - - amortizationexpense^(4)Amortization ofdebt discount and - - - - 12,025 - deferred financingcosts^(6)Impairment of long - - 1,072 - - - - lived assets^(15)Share-based 5,543 11,381 96,910 - - - - compensation^(7)Depreciation^(8) 435 72 18,722 - - - -

Upfront, progressand milestonepayments related tolicenseand collaboration - 3,000 - - - - - agreements^(10)Fees related to - - 54 - - - - refinancingactivities^(17)Loss on debt - - - 31,856 - - - extinguishment^(13)Drug substance 483 - - - - - - harmonization costs^(14)Income tax effect - - - - - - (80,122 )on pre-tax non-GAAPadjustments^(11)Other non-GAAP - - - - - - 20,541 income taxadjustments^(12)Total of non-GAAP 196,531 61,818 117,416 31,856 12,025 (120 ) (59,581 )adjustments Non-GAAP $ (173,875 ) $ (76,665 ) $ (578,855 ) - $ (36,075 ) $ 1,671 $ (32,438 )

NOTES FOR CERTAIN INCOME STATEMENT LINE ITEMS - NON-GAAP

1.

Represents transaction and integration costs, including, advisory, legal, consulting and certain employee-related costs, incurred in connection with our acquisitions and divestitures. Costs recovered from subleases of acquired facilities and reimbursed expenses incurred under transition arrangements for divestitures are also reflected in this line item. In addition, the nine months ended September 30, 2020 amounts include the Curzion acquisition payment of $45.0 million, which was recorded as a research and development expense.

2.

Represents rent and maintenance charges for the leased Lake Forest office that we vacated in the first quarter of 2021.

3.

During the nine months ended September 30, 2021, we recorded $1.7 million of manufacturing plant start-up costs related to the purchase of a drug product manufacturing facility from EirGen in July 2021.

4.

Intangible amortization expenses are associated with our intellectual property rights, developed technology and customer relationships related to TEPEZZA, KRYSTEXXA, RAVICTI, PROCYSBI, ACTIMMUNE, UPLIZNA, BUPHENYL, PENNSAID 2% and RAYOS.

5.

During the three and nine months ended September 30, 2021, we recognized in cost of goods sold $8.9 million and $16.9 million, respectively, for inventory step-up expense related to UPLIZNA inventory revalued in connection with the Viela acquisition. Because inventory step-up expense is related to an acquisition, will not continue indefinitely and has a significant effect on our gross profit, gross margin percentage and net income for all affected periods, the Company excludes inventory step-up expense from its non-GAAP financial measures.

6.

Represents amortization of debt discount and deferred financing costs associated with our debt.

7.

Represents share-based compensation expense associated with our stock option, restricted stock unit and performance stock unit grants to our employees and non-employee directors, and our employee share purchase plan.

8.

Represents depreciation expense related to our property, plant, equipment, software and leasehold improvements.

9.

We recorded $5.0 million of expense during the three and nine months ended September 30, 2021 for litigation settlements.

10.

During the nine months ended September 30, 2021, we recognized a $40.0 million upfront payment in relation to the agreement with Arrowhead, which was subsequently paid in July 2021. In addition, we recognized $6.5 million of milestone payments in relation to daxdilimab (HZN-7734) and $7.0 million of progress payments with HemoShear Therapeutics, LLC, or HemoShear.

During the nine months ended September 30, 2020, we recognized a $3.0 million progress payment in relation to our agreement with HemoShear, which was paid in July 2020.

11.

Income tax adjustments on pre-tax non-GAAP adjustments represent the estimated income tax impact of each pre-tax non-GAAP adjustment based on the statutory income tax rate of the applicable jurisdictions for each non-GAAP adjustment.

12.

During the nine months ended September 30, 2021, we recognized a U.S. federal and state tax liability on U.S. taxable income generated from an intercompany transfer and license of intellectual property from a U.S. subsidiary to an Irish subsidiary which was partially offset by the recognition of a deferred tax asset in the Irish subsidiary, resulting in a non-GAAP tax adjustment of $26.2 million. We also recognized $51.3 million of tax benefit due to a reduction in the state tax rate expected to apply to the reversal of temporary differences between the book values and tax bases of certain assets acquired through the Viela acquisition. The reduction in state tax rate resulted in a reduction in the deferred tax liability relating to these assets and a non-GAAP tax adjustment of $51.3 million.

During the nine months ended September 30, 2020, following the publication of the Anti-Hybrid Rules on April 8, 2020, we recorded a write off of a deferred tax asset related to certain interest expense accrued to a foreign related party during the year ended December 31, 2019 and recognized a corresponding one-time tax provision, resulting in a non-GAAP tax adjustment of $15.2 million. We also recognized a U.S. federal tax liability on U.S. taxable income generated from an intercompany transfer of intellectual property from a U.S. subsidiary to an Irish subsidiary, which was partially offset by the recognition of a deferred tax asset in the Irish subsidiary, resulting in a non-GAAP tax adjustment of $5.3 million.

13.

During the nine months ended September 30, 2020, we recorded a loss on debt extinguishment of $31.9 million in the condensed consolidated statements of comprehensive income, which reflects the extinguishment of our Exchangeable Senior Notes.

14.

During the year ended December 31, 2016, we entered into a definitive agreement to acquire certain rights to interferon gamma-1b, marketed as IMUKIN in an estimated thirty countries primarily in Europe and the Middle East, or the IMUKIN purchase agreement. We already owned the rights to interferon gamma-1b marketed as ACTIMMUNE in the United States, Canada and Japan. In connection with the IMUKIN purchase agreement, we also committed to pay our contract manufacturer certain amounts related to the harmonization of the manufacturing processes for ACTIMMUNE and IMUKIN drug substance, or the harmonization program. At the time we entered into the IMUKIN purchase agreement and the harmonization program commitment was made, we had anticipated achieving certain benefits should the Phase 3 clinical trial evaluating ACTIMMUNE for the treatment of Friedreich's ataxia, be successful. If the study had been successful and if U.S. marketing approval had subsequently been obtained, we had forecasted significant increases in demand for the medicine and the harmonization program would have resulted in significant benefits for us. Following our discontinuation of the Friedreich's ataxia program, we determined that certain assets, including an upfront payment related to the IMUKIN purchase agreement, were impaired, and the costs under the harmonization program would no longer have benefit to us and should be expensed as incurred.

15.

During the nine months ended September 30, 2021, we recorded a right-of-use asset impairment charge of $12.4 million as a result of vacating the leased Lake Forest office.

During the nine months ended September 30, 2020, we recorded an impairment charge of $1.1 million related to the Novato, California office lease, which was obtained through an acquisition.

16.

During the nine months ended September 30, 2021, gain on sale of asset represents a $2.0 million contingent consideration payment related to the sale of MIGERGOT in 2019. The contingent consideration was triggered during the second quarter of 2021 and it was received in July 2021.

17.

Represents arrangement and other fees relating to our refinancing activities.

View source version on businesswire.com: https://www.businesswire.com/news/home/20211103005587/en/

CONTACT: Investors: Tina Ventura Senior Vice President, Investor Relations investor-relations@horizontherapeutics.com

CONTACT: Ruth Venning Executive Director, Investor Relations investor-relations@horizontherapeutics.com

CONTACT: U.S. Media: Geoff Curtis Executive Vice President, Corporate Affairs & Chief Communications Officer media@horizontherapeutics.com

CONTACT: Ireland Media: Ray Gordon Gordon MRM ray@gordonmrm.ie