Welcome to the Big Molecule Watch!


Goodwin’s award-winning Big Molecule Watch is the best resource for daily updates and analyses of regulatory issues, litigation, legislation, and other news in the world of biologics, biosimilars and related technologies. The editors of this blog have collectively been watching and engaging with the world of biologics and biosimilars (“big molecules”) since before the inception of the biosimilar industry in the U.S.  With extensive experience representing clients at all stages of a biologic’s or biosimilar’s lifecycle, from research and development, to patents, to regulatory application and approval, and through litigation and appeals, we are excited to share our observations and insights as the industry and the law continues to develop in this exciting area.

This blog focuses on “big molecules” as opposed to “small molecules.” Small molecule drugs have low molecular weight, a simple and well-defined structure, and are chemically synthesized. In contrast, “big molecule” drugs have high molecular weight, complex structures, and are derived from living organisms. For example, aspirin is small molecule while a monoclonal antibody is a big molecule. For further reading on big molecules, consider FDA's resources on biologics.

Fresenius Kabi Announces FDA Approval of TYENNE, a Tocilizumab Biosimilar Referencing ACTEMRA

On March 7, Fresenius Kabi announced that the FDA has approved its tocilizumab biosimilar, TYENNE (tocilizumab-aazg) for inflammatory and immune diseases indications including rheumatoid arthritis, giant cell arteritis, polyarticular juvenile idiopathic arthritis, and systemic juvenile idiopathic arthritis.  TYENNE is the second FDA approved biosimilar of ACTEMRA (following Biogen’s TOFIDENCE (tocilizumab-bavi)…

Read More

Biocon Settles with Bayer and Regeneron, Securing Canada Market Entry Date for Aflibercept Biosimilar

On March 4, Biocon Biologics Ltd. announced it has signed a settlement agreement with Bayer Inc. and Regeneron Pharmaceuticals, Inc. regarding YESAFILI, Biocon’s proposed biosimilar to EYLEA (aflibercept). The settlement resolves multiple patent infringement proceedings in the Federal Court of Canada. Under the agreement, Biocon can launch YESAFILI in Canada…

Read More

Biocon Settles with Janssen, Securing U.S. Market Entry Date for Ustekinumab Biosimilar

On February 29, Biocon Biologics Ltd announced that it signed a settlement and license agreement with Janssen Biotech Inc. and Johnson & Johnson (“J&J”) regarding Bmab 1200, Biocon’s proposed biosimilar to STELARA.  The agreement allows Biocon to launch in the United States in February 2025, pending FDA approval.  As part…

Read More

Teva and Alvotech’s Adalimumab Biosimilar Receives Interchangeable Status at FDA

On February 23rd, 2024, Alvotech and Teva announced FDA’s approval of SIMLANDI (adalimumab-ryvk), the first high-concentration and citrate-free biosimilar interchangeable with Humira. SIMLANDI injection was approved for nine indications—rheumatoid arthritis, juvenile idiopathic arthritis, psoriatic arthritis, ankylosing spondylitis, Crohn’s Disease, ulcerative colitis, plaque psoriasis, hidradenitis suppurative, and uveitis. The approval follows…

Read More

Court Grants Summary Judgment Ending AstraZeneca's Lawsuit Challenging the IRA

Today, the district court for the District of Delaware (Judge Connolly) granted the government’s motion for summary judgment on all claims brought by AstraZeneca in its Complaint challenging the Drug Price Negotiation Program of the IRA. AstraZeneca raised three challenges to the IRA’s Drug Price Negotiation Program: Counts I and…

Read More

Post-Trial Updates on Regeneron v. Mylan (Aflibercept) BPCIA Litigation

Appeals from and redacted memorandum and opinion in support of judgment in Regeneron v. Mylan (aflibercept) BPCIA case filed As we previously reported, trial in Regeneron Pharmaceutical, Inc.’s BPCIA case against Mylan Pharmaceuticals Inc. and Biocon Biologics, Inc. (collectively, “the Biocon Defendants”) regarding the Biocon Defendants’ proposed aflibercept biosimilar concluded…

Read More

Genentech and Partners Voluntarily Dismiss IPR Appeals Related to Genentech’s ACTEMRA® (Tocilizumab)

Full frame of molecular structure of liquids in motion.

On February 12, 2024, Chugai, Genentech, and Hoffmann-La Roche filed a motion for voluntary dismissal of their appeals of the PTAB’s Final Written Decisions in IPR2022-00578 and IPR2022-00579.  The appeals concerned IPRs filed by Celltrion where the PTAB found all challenged claims of U.S. Patent Nos. 8,580,264 and 10,874,677 were…

Read More

Artiva Biotherapeutics Receives FDA Fast Track Designation for AlloNK in Lupus Nephritis

On February 22, 2024, Artiva announced that the FDA has granted Fast Track designation to Artiva’s AlloNK (AB-101) for the treatment of lupus nephritis in combination with rituximab or obinutuzumab. AlloNK is an allogeneic, off-the shelf, NK cell therapy that is not genetically modified and designed to enhance the antibody-dependent…

Read More

Alvotech Announces More Settlements and Expected Launch Dates Regarding Biosimilar to STELARA (ustekinumab), AVT04

On February 15, Alvotech announced that it reached more settlement agreements with Johnson & Johnson for ATV04, Alvotech’s biosimilar to STELARA (ustekinumab).  The settlements cover Canada, the European Economic Area, and Japan, clearing the way for Alvotech to launch AVT04 in those markets, where AVT04 has already received regulatory approval. …

Read More