AbbVie's business model is a sophisticated, vertically integrated pharmaceutical engine that generates revenue primarily through the discovery, development, and global commercialization of prescription drugs and biologics, supplemented by a substantial aesthetics and medical device business inherited from the Allergan acquisition. Understanding how AbbVie makes money requires examining four distinct revenue streams that interact in ways that are more complex than most pharmaceutical companies operate. The first and historically most important revenue stream is branded immunology pharmaceuticals. For the better part of a decade, this meant Humira — adalimumab — a tumor necrosis factor inhibitor delivered via self-injection that patients use to manage rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, Crohn's disease, ulcerative colitis, plaque psoriasis, and several other inflammatory conditions. At its peak in 2022, Humira generated approximately $21.2 billion in global net revenues in a single year, accounting for roughly 37 percent of AbbVie's total revenue. The drug's profitability was extraordinary: gross margins on Humira routinely exceeded 80 percent, and given that Humira's research costs had been amortized over its commercial lifetime since 2003, the incremental manufacturing cost per dose was a small fraction of its list price. The U.S. Launch of biosimilar competitors in January 2023 disrupted this dynamic fundamentally. By 2024, Humira U.S. Net revenues had declined to approximately $8.9 billion — down sharply from prior peaks — while Humira international revenues had already been compressed by European biosimilar entry dating back to 2018. The second revenue stream, and the one that now defines AbbVie's financial future, is the next-generation immunology portfolio anchored by Skyrizi (risankizumab) and Rinvoq (upadacitinib). Skyrizi is an interleukin-23 inhibitor approved for plaque psoriasis, psoriatic arthritis, Crohn's disease, and ulcerative colitis. Rinvoq is a JAK1 selective inhibitor approved across an expanding range of inflammatory indications including rheumatoid arthritis, atopic dermatitis, ulcerative colitis, Crohn's disease, ankylosing spondylitis, and psoriatic arthritis. Together, these two drugs generated approximately $16.4 billion in combined global net revenues in fiscal year 2024, growing at annual rates well above 40 percent. Management has guided publicly that the combined Skyrizi and Rinvoq platform is expected to generate over $27 billion in combined revenue by 2027, a projection that would make this drug pair — rather than any single molecule — the most valuable pharmaceutical franchise in the company's history. The pricing model for these drugs follows the standard U.S. Biopharmaceutical approach: list prices set at premium levels, with rebates negotiated with pharmacy benefit managers and payers that lower net realized prices, but still leave net revenues per patient that are substantial relative to manufacturing costs. The third revenue stream is oncology and hematology, a business that AbbVie built through internal research and a series of targeted acquisitions. The most important asset in this category is Imbruvica (ibrutinib), a BTK inhibitor developed in partnership with Janssen, a division of Johnson & Johnson. Imbruvica was the first approved therapy for several B-cell malignancies including chronic lymphocytic leukemia, mantle cell lymphoma, and Waldenström's macroglobulinemia, and became a transformative treatment for blood cancer patients who previously had limited options. Under AbbVie's profit-sharing arrangement with Janssen, the two companies split Imbruvica global revenues and profits, with AbbVie receiving roughly 50 percent of combined net sales as its recognized revenue. Venclexta (venetoclax), developed jointly with Genentech and targeting BCL-2 protein in hematological malignancies, represents a growing oncology asset. However, Imbruvica has faced increasing competitive pressure from next-generation BTK inhibitors including AstraZeneca's Calquence and BeiGene's Brukinsa, and Imbruvica net revenues have been declining from their peak. AbbVie's oncology revenue in 2024 was approximately $4.7 billion globally, reflecting both Imbruvica's erosion and Venclexta's steady growth. The fourth major revenue stream is aesthetics and neurotoxin, inherited from the Allergan acquisition completed in May 2020. This segment is dominated by Botox, which exists in two commercial forms: Botox Cosmetic, used for facial aesthetics procedures including wrinkle reduction, and Botox Therapeutic, used for medical indications including chronic migraine, overactive bladder, cervical dystonia, and upper limb spasticity. Botox Cosmetic alone commands the dominant market share of the U.S. Facial aesthetics injectable market, with brand recognition so strong that the product name has become a generic cultural verb — something AbbVie's legal team must perpetually work to prevent from becoming a legally genericized term. Beyond Botox, AbbVie's aesthetics portfolio includes Juvederm, the market-leading line of hyaluronic acid dermal fillers used for lip augmentation, cheek augmentation, and facial contouring, along with Coolsculpting (fat reduction), Latisse (eyelash growth), and several other products. The aesthetics business generated approximately $5.3 billion in net revenues in fiscal year 2024. Unlike traditional pharmaceutical products, aesthetics revenue is more discretionary and more sensitive to macroeconomic conditions, since the majority of Botox Cosmetic and Juvederm procedures are elective cash-pay treatments that patients fund themselves without insurance reimbursement. Across all revenue streams, AbbVie's pricing strategy operates within the U.S. System of list-price-minus-rebate, where the gap between the published list price and the actual net price received can be enormous — sometimes exceeding 50 to 60 percent for mature branded products competing against biosimilars. This means that AbbVie's ability to defend or grow net revenues per patient unit depends heavily on its contracting sophistication with Express Scripts, CVS Caremark, OptumRx, and the major commercial and government payers. The company maintains a dedicated market access team of hundreds of professionals whose sole function is negotiating favorable formulary placement and rebate structures. Research and development investment is both a cost center and the lifeblood of the long-term business model. AbbVie invested approximately $8.7 billion in R&D in fiscal year 2024, representing roughly 15 percent of net revenues. This investment funds clinical trials across dozens of programs simultaneously, including late-stage trials in neuroscience targeting Parkinson's disease and mood disorders, early-stage oncology assets acquired through bolt-on acquisitions, and life cycle management programs that seek new indications for existing approved drugs. The latter — indication expansion — is particularly economically efficient, as it uses an already-approved molecule with an established safety profile to generate new revenue streams at a fraction of the cost required to bring an entirely new molecular entity through the regulatory process. Manufacturing and supply chain represent another dimension of AbbVie's business model. The company operates biologics manufacturing facilities in multiple countries, including major sites in the United States, Ireland, and Germany. Biologic drugs like Skyrizi and Humira are produced in living cell systems and require specialized fill-finish manufacturing that cannot be quickly outsourced or replicated. This creates both a competitive barrier — competitors cannot easily produce biosimilar copies — and an operational risk, as manufacturing disruptions at any single site can affect global supply. AbbVie's capital allocation model prioritizes dividends — the company has paid and grown its dividend every single year since the 2013 spin-off — alongside share repurchases and strategic acquisitions that are intended to replenish the pipeline. This shareholder-return-focused approach, combined with a revenue base that generates strong cash flows even as individual products cycle through patent cliffs, defines AbbVie's positioning as a pharmaceutical company that is also, in a meaningful sense, a yield-oriented investment for income-seeking shareholders.