Company lists · Data refreshed September 2026
Top 25 Orphan drug developers worldwide
RevenueBase identified 252 orphan drug developers worldwide as of September 2026 and tracks 23,330 professional contacts across them, including 10,884 with verified work emails. The United States is the largest market and Cambridge the largest hub.
This list covers orphan drug developers worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for orphan drug developers follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest orphan drug developers worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 6,136 contacts → | ||||
Indirect evidence “Alexion, AstraZeneca Rare Disease is focused on pioneering new possibilities for the rare disease community.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 3,593 contacts → | ||||
Indirect evidence “Jazz Pharmaceuticals plc (Nasdaq: JAZZ), is a global biopharmaceutical company whose purpose is to innovate to transform the lives of patients and their families.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,789 contacts → | ||||
Indirect evidence “Recordati has been at the forefront of life-enhancing and life-changing medicines for 100 years.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,556 contacts → | ||||
Indirect evidence “Leading with purpose.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 657 contacts → | ||||
Indirect evidence “Arrowhead Pharmaceuticals is a clinical stage, Nasdaq listed (ticker ARWR) company developing medicines that treat intractable diseases by silencing the genes that cause them.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 548 contacts → | ||||
Indirect evidence “At AMAG, aiming higher is in our DNA.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 491 contacts → | ||||
Indirect evidence “Our mission is to identify, develop and deliver life-changing therapies to people living with rare disease.#InRareForLife Community Guidelines…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 395 contacts → | ||||
Indirect evidence “Upsher‑Smith is the commercial arm of the Bora Group, focused on developing, marketing, and distributing pharmaceutical products that make a real difference for patients.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 374 contacts → | ||||
Indirect evidence “Mirum Pharmaceuticals is a leading rare disease company with a global footprint of approved products and a broad pipeline of investigational medicines.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 259 contacts → | ||||
Indirect evidence “Summit Mission Statement: To build a viable, long-lasting health care organization that assumes full responsibility for designing, developing, trial execution and enrollment…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 221 contacts → | ||||
Indirect evidence “Nordic Pharma is a privately owned, medium-size, fully integrated Pharma company with a history of internal product development and acquisitions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 217 contacts → | ||||
Partial evidence “Focused on complex therapies and orphan diseases, Varifarma is a company which is devoted to improving the patients' quality of life.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 189 contacts → | ||||
Indirect evidence “Founded in 2003, CG Life is a specialized pharma agency built for the unique challenges of bringing therapies for rare and hard-to-treat diseases to market, where traditional…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 185 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 175 contacts → | ||||
Indirect evidence “GENESIS Pharma is a European biopharmaceutical company specializing in the commercialization of innovative pharmaceutical products for serious and rare diseases.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 137 contacts → | ||||
Indirect evidence “Centessa Pharmaceuticals plc, a wholly owned subsidiary of Eli Lilly and Company, is developing a portfolio of orexin receptor 2 (OX2R) agonists for the potential treatment of…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 118 contacts → | ||||
Partial evidence “Transforming Rare Disease Treatment At Orphalan we identify, develop, and provide access to innovative treatments for patients with rare diseases to make a positive and meaningful…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 116 contacts → | ||||
Partial evidence “Pioneering Medicines, Flagship Pioneering’s in house drug discovery and development unit, is dedicated to conceiving and developing a broad portfolio of life-changing treatments…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 114 contacts → | ||||
Indirect evidence “With demonstrated clinical development and commercialization expertise, VIVUS is dedicated to addressing the therapeutic needs of patients with serious medical conditions and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 98 contacts → | ||||
Indirect evidence “QOL Medical is a specialty biopharmaceutical company dedicated to improving the quality of life for patients with rare diseases, for their families, and for the physicians and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 84 contacts → | ||||
Indirect evidence “We are a clinical-stage biopharmaceutical company focused on improving the lives of patients with genetically defined diseases in areas of high unmet medical need, with an initial…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 80 contacts → | ||||
Partial evidence “ADIENNE is an integrated biopharmaceutical group of companies based in Lugano, Switzerland, with a proprietary portfolio of orphan-designated marketed medicinal product, clinical…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 78 contacts → | ||||
Indirect evidence “We are a purpose-driven, commercial-stage company with a late-stage pipeline committed to redefining what is possible in bringing life-changing therapies to people living with…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 74 contacts → | ||||
Indirect evidence “Valentech is a specialized Latin American healthcare company focused on enabling patient access to innovative therapies for high‑burden rare diseases across Central and South…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 70 contacts → | ||||
Indirect evidence “We are committed to transforming the lives of people affected by cancer or rare disease, globally.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: orphan drug developers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names orphan drug developers.
- Partial evidence
- Its own public description names part of orphan drug developers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name orphan drug developers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 252 orphan drug developers worldwide
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Orphan drug developers worldwide at a glance
As of Sep 20, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among orphan drug developers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for orphan drug developers are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “orphan drug developers”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names orphan drug developers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among orphan drug developers, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 10,884 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Orphan drug developers by location
1 lists · largest firstEvery Orphan drug developers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names orphan drug developers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many orphan drug developers are there worldwide?
RevenueBase identified 252 orphan drug developers worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Alexion Pharmaceuticals, INC, headquartered in Boston, tops this list with the largest team on record.
Which country has the most orphan drug developers?
The United States leads with 95 companies. Every orphan drug developers list by country and city is linked on this page.
Which city has the most orphan drug developers?
Cambridge leads with 7 headquartered companies, followed by London (7) and New York (6).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 10,884 verified decision-maker contacts tracked across these 252 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.