Etanercept-YKRO(Samsung Bioepis Co., Ltd.)

OPUVIZ™ is one of the first wave aflibercept biosimilars in Europe OPUVIZ is the second European Commission (EC)-approved ophthalmology biosimilar under Samsung Bioepis and Biogen’s partnership EC approval based on robust totality of evidence confirming biosimilarity to reference aflibercept in terms of quality, efficacy, and safety INCHEON, Korea and CAMBRIDGE, Mass. – November 18, 2024 – Samsung Bioepis Co., Ltd. and Biogen Inc. (Nasdaq: BIIB) today announced that the European Commission (EC) has approved OPUVIZ™ 40 mg/mL solution for injection in a vial, a biosimilar referencing Eylea1,2 (aflibercept), developed and registered by Samsung Bioepis. OPUVIZ, also known as SB15, is approved in adult patients for the treatment of neovascular (wet) age related macular degeneration (AMD), visual impairment due to macular oedema secondary to retinal vein occlusion (RVO; branch or central RVO), visual impairment due to diabetic macular oedema (DME), and visual impairment due to myopic choroidal neovascularisation (myopic CNV). “Retinal disorders are affecting millions of people’s lives in Europe, yet many patients face barriers to treatment due to high costs,” said Byoungin Jung, Vice President, Regulatory Affairs at Samsung Bioepis. “The EC approval for OPUVIZ represents a major step toward our goal of expanding access to vital biologic therapies for those in need. We will continue working to expand access to our quality-assured, safe and effective biosimilars to improve patient’s quality of life and support sustainability of healthcare systems.” “This approval is an exciting milestone for both patients and healthcare systems in Europe. OPUVIZ has the potential to create a new treatment option for eligible patients, while also easing the burden of costs associated with these retinal conditions,” said Wolfram Schmidt, Head of Europe at Biogen. “We are delighted to continue our partnership with Samsung Bioepis, with the approval of our fifth biosimilar treatment option in Europe.” The EC approval was based on a totality of evidence including analytical, non-clinical data, and clinical data. A randomized, double-masked, parallel group, multicenter Phase 3 study demonstrated equivalent efficacy and comparable safety, immunogenicity, and pharmacokinetics (PK) profiles between SB15 and reference aflibercept (AFL). The primary endpoint was met in terms of change from baseline in best corrected visual acuity (BCVA) at week 8, and the 32-week interim analysis and 56-week analysis demonstrated comparability in other secondary efficacy, safety, immunogenicity, and PK endpoints between SB15 and AFL.3, 4 OPUVIZ is the second ophthalmology biosimilar approved in Europe and fifth biosimilar in the portfolio developed by Samsung Bioepis with commercialization rights held by Biogen, which includes BYOOVIZ™ (ranibizumab), BENEPALI™ (etanercept), IMRALDI™ (adalimumab) and FLIXABI™ (infliximab). In November 2019, Samsung Bioepis and Biogen announced that they had entered into a commercialization agreement for two ophthalmology biosimilar candidates, BYOOVIZ (SB11, ranibizumab) and OPUVIZ (SB15, aflibercept), in the U.S., Canada, Europe and certain other markets. About the SB15 Phase 3 study3,4 The study is a randomized, double-masked, parallel group phase 3 study conducted at 56 centers in 10 countries from June 2020 to March 2022, including follow-up through 56 weeks. Of 549 screened participants, 449 participants 50 years and older with treatment-naive nAMD were randomized 1:1 to receive either SB15 (n = 224) or AFL (n = 225). At Week 32, patients were re-randomized to either continue SB15 or AFL, or switch from AFL to SB15 resulting in three treatment groups; continuing SB15 (SB15/SB15, n=219), continuing AFL (AFL/AFL, n=108), switching from AFL to SB15 (AFL/SB15, n=111). In total, 425 patients completed up to Week 56. Key efficacy endpoints of the study were 1) change from baseline in best corrected visual acuity (BCVA), 2) change from baseline in central subfield thickness (CST), and 3) proportion of patients with intra or sub-retinal fluid. About Samsung Bioepis Co., Ltd. Established in 2012, Samsung Bioepis is a biopharmaceutical company committed to realizing healthcare that is accessible to everyone. Through innovations in product development and a firm commitment to quality, Samsung Bioepis aims to become the world's leading biopharmaceutical company. Samsung Bioepis continues to advance a broad pipeline of biosimilar candidates that cover a spectrum of therapeutic areas, including immunology, oncology, ophthalmology, hematology, nephrology, and endocrinology. For more information, please visit: www.samsungbioepis.com and follow us on social media – X, LinkedIn. About Biogen Founded in 1978, Biogen is a leading biotechnology company that pioneers innovative science to deliver new medicines to transform patients’ lives and to create value for shareholders and our communities. We apply deep understanding of human biology and leverage different modalities to advance first-in-class treatments or therapies that deliver superior outcomes. Our approach is to take bold risks, balanced with return on investment to deliver long-term growth. We routinely post information that may be important to investors on our website at www.biogen.com. Follow us on social media - Facebook, LinkedIn, X, YouTube. Biogen Safe Harbor This news release contains forward-looking statements, including but not limited to those relating to the potential benefits, safety and efficacy of OPUVIZ; the timing and status of current and future regulatory filings; risks and uncertainties associated with drug development and commercialization, including OPUVIZ; the potential of Biogen’s commercial business and pipeline programs, including BYOOVIZ, BENEPALI, IMRALDI, FLIXABI and OPUVIZ; the anticipated benefits and potential of Biogen’s collaboration arrangements with Samsung Bioepis; and Biogen’s strategy and plans. These forward-looking statements may be accompanied by words such as “aim,” “anticipate,” “believe,” “could,” “estimate,” “expect,” “forecast,” “intend,” “may,” “plan,” “potential,” “possible,” “will,” “would” and other words and terms of similar meaning. Drug development and commercialization involve a high degree of risk, and only a small number of research and development programs result in commercialization of a product. Results in early stage clinical trials may not be indicative of full results or results from later stage or larger scale clinical trials and do not ensure regulatory approval. You should not place undue reliance on these statements. These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in such statements, including without limitation, actual timing and content of submissions to and decisions made by the regulatory authorities regarding OPUVIZ; regulatory submissions may take longer or be more difficult to complete than expected; regulatory authorities may require additional information or further studies, or may fail or refuse to approve or may delay approval of OPUVIZ; risks of unexpected costs or delays or other unexpected hurdles; uncertainty of success in the development and potential commercialization of OPUVIZ, which may be impacted by, among other things, the level of preparedness of healthcare providers to treat patients, difficulties in obtaining or changes in the availability of reimbursement for OPUVIZ and other unexpected difficulties or hurdles; the occurrence of adverse safety events; unexpected concerns that may arise from additional data or analysis; failure to protect and enforce data, intellectual property and other proprietary rights and uncertainties relating to intellectual property claims and challenges; risks of legal actions, regulatory scrutiny or other challenges to biosimilars, results of operations and financial condition; product liability claims; and third party collaboration risks. The foregoing sets forth many, but not all, of the factors that could cause actual results to differ from Biogen’s expectations in any forward-looking statement. Investors should consider this cautionary statement as well as the risk factors identified in Biogen’s most recent annual or quarterly report and in other reports Biogen has filed with the U.S. Securities and Exchange Commission. These statements are based on Biogen’s current beliefs and expectations and speak only as of the date of this news release. Biogen does not undertake any obligation to publicly update any forward-looking statements. References: ### MEDIA CONTACT(S): Biogen Jack Cox + 1 781 464 3260 public.affairs@biogen.com Samsung Bioepis Anna Nayun Kim nayun86.kim@samsung.com Yoon Kim yoon1.kim@samsung.com INVESTOR CONTACT: Biogen Stephen Amato +1 781 464 2442 IR@biogen.com

INCHEON, South Korea and CAMBRIDGE, MA, USA I September 20, 2024 I Samsung Bioepis Co., Ltd. and Biogen Inc. (Nasdaq: BIIB) today announced that the European Medicines Agency’s (EMA) Committee for Medicinal Products for Human Use (CHMP) has adopted a positive opinion for OPUVIZ™ 40 mg/mL solution for injection in a vial, a biosimilar referencing Eylea 2 (aflibercept), also known as SB15. OPUVIZ has been recommended for approval in adult patients for the treatment of neovascular (wet) age related macular degeneration (AMD), visual impairment due to macular oedema secondary to retinal vein occlusion (RVO; branch or central RVO), visual impairment due to diabetic macular oedema (DME), and visual impairment due to myopic choroidal neovascularisation (myopic CNV). “We are pleased to have our second ophthalmology biosimilar OPUVIZ recommended for approval in Europe. This marks another significant milestone for Samsung Bioepis and more importantly for people living with retinal disorders as we are making a step forward in enhancing the availability of the essential treatment,” said Byoungin Jung, Vice President and Regulatory Affairs Team Leader at Samsung Bioepis. “The positive opinion underscores not only our commitment to innovation but also ensuring access so that more patients can benefit from biologic therapies. We will continue our work to transform the way biologic therapies are brought to patients and enhance the lives of patients, through our pioneering and innovative use of science and technology,” she added. “We are excited about the positive CHMP recommendation for OPUVIZ in Europe and the potential for it to serve as a meaningful therapeutic option for individuals impacted by retinal vascular disorders,” said Ian Henshaw, Global Head of Biosimilars at Biogen. “Biosimilars could help broaden access and offer significant healthcare savings through the treatment of these complex and often debilitating ophthalmic diseases.” The CHMP’s positive opinion was based on a totality of evidence including analytical, non-clinical data, and clinical data. A randomized, double-masked, parallel group, multicenter Phase 3 study demonstrated equivalent efficacy and comparable safety, immunogenicity, and pharmacokinetics (PK) profiles between SB15 and reference aflibercept (AFL). The primary endpoint was met in terms of change from baseline in best corrected visual acuity (BCVA) at week 8, and the 32-week interim analysis and 56-week analysis demonstrated comparability in other secondary efficacy, safety, immunogenicity, and PK endpoints between SB15 and AFL. 3, 4 This CHMP’s positive opinion will now be referred to the European Commission (EC) which will decide whether to grant a marketing authorization for OPUVIZ. If a marketing authorization is granted by the EC, OPUVIZ would become the second ophthalmology biosimilar approved in Europe and fifth biosimilar in the portfolio developed by Samsung Bioepis with commercialization rights held by Biogen, which includes BYOOVIZ™ (ranibizumab), BENEPALI™ (etanercept), IMRALDI™ (adalimumab) and FLIXABI™ (infliximab). In November 2019, Samsung Bioepis and Biogen announced that they had entered into a commercialization agreement for two ophthalmology biosimilar candidates, BYOOVIZ (SB11, ranibizumab) and OPUVIZ (SB15, aflibercept), in the U.S., Canada, Europe, Japan and Australia. About the SB15 Phase 3 study 3 The study is a randomized, double-masked, parallel group phase 3 study conducted at 56 centers in 10 countries from June 2020 to March 2022, including follow-up through 56 weeks. Of 549 screened participants, 449 participants 50 years and older with treatment-naive nAMD were randomized 1:1 to receive either SB15 (n = 224) or AFL (n = 225). At Week 32, patients were re-randomized to either continue SB15 or AFL, or switch from AFL to SB15 resulting in three treatment groups; continuing SB15 (SB15/SB15, n=219), continuing AFL (AFL/AFL, n=108), switching from AFL to SB15 (AFL/SB15, n=111). In total, 425 patients completed up to Week 56. Key efficacy endpoints of the study were 1) change from baseline in best corrected visual acuity (BCVA), 2) change from baseline in central subfield thickness (CST), and 3) proportion of patients with intra or sub-retinal fluid. About Samsung Bioepis Co., Ltd. Established in 2012, Samsung Bioepis is a biopharmaceutical company committed to realizing healthcare that is accessible to everyone. Through innovations in product development and a firm commitment to quality, Samsung Bioepis aims to become the world’s leading biopharmaceutical company. Samsung Bioepis continues to advance a broad pipeline of biosimilar candidates that cover a spectrum of therapeutic areas, including immunology, oncology, ophthalmology, hematology, nephrology, and endocrinology. For more information, please visit: www.samsungbioepis.com and follow us on social media – X , LinkedIn . About Biogen Founded in 1978, Biogen is a leading biotechnology company that pioneers innovative science to deliver new medicines to transform patients’ lives and to create value for shareholders and our communities. We apply deep understanding of human biology and leverage different modalities to advance first-in-class treatments or therapies that deliver superior outcomes. Our approach is to take bold risks, balanced with return on investment to deliver long-term growth. We routinely post information that may be important to investors on our website at www.biogen.com . Follow us on social media – Facebook , LinkedIn , X , YouTube . SOURCE: Samsung Bioepis