Company lists · Data refreshed September 2026

Top 25 Pharmaceutical intermediate suppliers based in the United States

Name: Pharmaceutical intermediate suppliers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 214 companies tracked

RevenueBase identified 214 pharmaceutical intermediate suppliers headquartered in the United States as of September 2026 and tracks 4,335 professional contacts across them, including 1,503 with verified work emails. San Diego is the largest hub.

This list covers pharmaceutical intermediate suppliers headquartered in the United States, 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 17, 2026.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

214Companies

4,335Contacts tracked

1,503Verified emails

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The 25 largest pharmaceutical intermediate suppliers based in the United States

Ranked by team size

Top 25 of 214 pharmaceutical intermediate suppliers based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to pharmaceutical intermediate suppliers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SPI Pharma	Strong evidence	Wilmington, DE, United StatesHQ checked Sep 17, 2026	201-500	304 contacts →
	Strong evidence “For over 75 years, we have supplied the pharmaceutical industry with highly engineered products and innovative solutions that improve the formulation and delivery of drug products…” Source: RevenueBase Database · checked Sep 17, 2026
2	Spectrum Chemical Mfg. Corp	Indirect evidence	New Brunswick, NJ, United StatesHQ checked Sep 17, 2026	201-500	232 contacts →
	Indirect evidence “Spectrum Chemical Mfg.” Source: RevenueBase Database · checked Sep 17, 2026
3	Jubilant Pharma Limited	Partial evidence	Yardley, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	184 contacts →
	Partial evidence “Jubilant Pharma Limited is a global integrated pharmaceutical company offering a wide range of products and services to our customers across geographies.” Source: RevenueBase Database · checked Sep 17, 2026
4	Adesis, INC	Indirect evidence	New Castle, DE, United StatesHQ checked Sep 17, 2026	51-200	182 contacts →
	Indirect evidence “Adesis Inc.” Source: RevenueBase Database · checked Sep 17, 2026
5	Norwich Pharma Services	Partial evidence	Norwich, NY, United StatesHQ checked Sep 17, 2026	201-500	174 contacts →
	Partial evidence “Norwich is a leading provider of contract manufacturing and clinical services for the pharmaceuticals industry.” Source: RevenueBase Database · checked Sep 17, 2026
6	Global Pharma TEK	Partial evidence	Edison, NJ, United StatesHQ checked Sep 17, 2026	201-500	169 contacts →
	Partial evidence “Founded in 2011, Global Pharma Tek (GPT) is a leading pharmaceutical conglomerate offering a wide range of services to the industry.” Source: RevenueBase Database · checked Sep 17, 2026
7	Biospectra, INC	Partial evidence	Bangor, PA, United StatesHQ checked Sep 17, 2026	201-500	152 contacts →
	Partial evidence “BioSpectra Inc.(BSI), is a privately-owned manufacturer of premium pharmaceutical ingredients and bulk, cGMP fine chemicals, in service to many leading BioPharma companies around…” Source: RevenueBase Database · checked Sep 17, 2026
8	Apicore Pharmaceuticals	Partial evidence	East Brunswick, NJ, United StatesHQ checked Sep 17, 2026	501-1,000	141 contacts →
	Partial evidence “Apicore LLC, a wholly owned subsidiary of RK Pharma Inc is a leading process R&D and API manufacturing service provider for the worldwide pharmaceutical industry.” Source: RevenueBase Database · checked Sep 17, 2026
9	Wiley Companies	Indirect evidence	Coshocton, OH, United StatesHQ checked Sep 17, 2026	201-500	102 contacts →
	Indirect evidence “Wiley Companies is an ISO 9001:2015 and FSSC certified custom chemicals and food ingredients manufacturer with facilities in Coshocton, OH, and New Albany, OH.” Source: RevenueBase Database · checked Sep 17, 2026
10	Ethox Chemicals	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 17, 2026	201-500	82 contacts →
	Indirect evidence “Ethox Chemicals, A Syntha Group Company Founded in 1938 by Fred Wilson, Sr.” Source: RevenueBase Database · checked Sep 17, 2026
11	Chemwerth INC	Partial evidence	Woodbridge, CT, United StatesHQ checked Sep 17, 2026	51-200	81 contacts →
	Partial evidence “LEADING THE SUPPLY OF HIGH QUALITY GENERIC APIs 21st Century economic, social, technical and regulatory dynamics are dramatically changing the pharmaceutical world making it more…” Source: RevenueBase Database · checked Sep 17, 2026
12	Synsmart	Indirect evidence	Newtown, PA, United StatesHQ checked Sep 17, 2026	51-200	78 contacts →
	Indirect evidence “Founded in 2014, SynSmart has made its name in chemistry services for early-stage discovery projects as well as collaborative scale-up and manufacturing support services.” Source: RevenueBase Database · checked Sep 17, 2026
13	TCG Greenchem INC	Indirect evidence	Ewing, NJ, United StatesHQ checked Sep 17, 2026	11-50	74 contacts →
	Indirect evidence “Offering Seamless CMC Development Services Including Process Research & Development and Delivery of cGMP APIs” Source: RevenueBase Database · checked Sep 17, 2026
14	Antheia, INC	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 17, 2026	51-200	71 contacts →
	Partial evidence “Antheia is the advanced biosynthesis company transforming pharmaceutical manufacturing and innovation for the 21st century.” Source: RevenueBase Database · checked Sep 17, 2026
15	Optima Chemical Group LLC	Strong evidence	Douglas, GA, United StatesHQ checked Sep 17, 2026	51-200	68 contacts →
	Strong evidence “Optima Chemical provides custom manufacturing and support services for advanced intermediates and fine chemicals to a variety of industries including Pharmaceutical…” Source: RevenueBase Database · checked Sep 17, 2026
16	Interchem Corporation	Partial evidence	Paramus, NJ, United StatesHQ checked Sep 17, 2026	11-50	58 contacts →
	Partial evidence “For over 30 years, Interchem has been successfully locating sources of fine chemicals, intermediates, bulk actives, and sophisticated next generation compounds from all over the…” Source: RevenueBase Database · checked Sep 17, 2026
17	Lacamas Laboratories	Indirect evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	11-50	56 contacts →
	Indirect evidence “Lacamas Laboratories manufactures and delivers high quality products at the best price possible, on time every time.” Source: RevenueBase Database · checked Sep 17, 2026
18	Pharm Ops, INC	Indirect evidence	Phillipsburg, NJ, United StatesHQ checked Sep 17, 2026	n/a	53 contacts →
	Indirect evidence “Pharm Ops Inc.” Source: RevenueBase Database · checked Sep 17, 2026
19	Chemscene	Partial evidence	Monmouth Junction, NJ, United StatesHQ checked Sep 17, 2026	501-1,000	51 contacts →
	Partial evidence “About Us Headquartered in New Jersey, USA, ChemScence is a global leading manufacturer and supplier of building blocks and fine research chemicals.” Source: RevenueBase Database · checked Sep 17, 2026
20	Kingchem	Indirect evidence	Allendale, NJ, United StatesHQ checked Sep 17, 2026	501-1,000	49 contacts →
	Indirect evidence “Kingchem is a vertically-integrated, global CDMO.” Source: RevenueBase Database · checked Sep 17, 2026
21	Wilmington Pharmatech Company LLC	Partial evidence	Newark, DE, United StatesHQ checked Sep 17, 2026	51-200	44 contacts →
	Partial evidence “Wilmington PharmaTech (WPT) is a U.S-based Contract Research, Development, and Manufacturing Organization (CRDMO) providing end-to-end solutions for the pharmaceutical and…” Source: RevenueBase Database · checked Sep 17, 2026
22	Pharmablock USA , INC	Indirect evidence	West Chester, PA, United StatesHQ checked Sep 17, 2026	51-200	43 contacts →
	Indirect evidence “PharmaBlock (USA), Inc.” Source: RevenueBase Database · checked Sep 17, 2026
23	A1 Biochem Labs	Indirect evidence	Wilmington, NC, United StatesHQ checked Sep 17, 2026	51-200	34 contacts →
	Indirect evidence “A1 BioChem Labs (ABCL) is a Contract Research Organization with three locations located in Wilmington, North Carolina and Hyderabad, India.” Source: RevenueBase Database · checked Sep 17, 2026
24	Dipharma INC	Indirect evidence	Kalamazoo, MI, United StatesHQ checked Sep 17, 2026	51-200	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	SST Corporation	Indirect evidence	Fairfield, NJ, United StatesHQ checked Sep 17, 2026	11-50	32 contacts →
	Indirect evidence “SST Corporation was founded in New York City in 1948, as a brokerage house for industrial chemical supply.” Source: RevenueBase Database · checked Sep 17, 2026

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: pharmaceutical intermediate suppliers. 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 pharmaceutical intermediate suppliers.
Partial evidence: Its own public description names part of pharmaceutical intermediate suppliers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name pharmaceutical intermediate suppliers. 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 214 pharmaceutical intermediate suppliers based in the United States

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Pharmaceutical intermediate suppliers based in the United States at a glance

As of Sep 17, 2026

34.7%Verified-email coverage

20.3Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · San Diego

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 214 companies.

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 pharmaceutical intermediate suppliers, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “pharmaceutical intermediate suppliers”. 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 pharmaceutical intermediate suppliers), 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 pharmaceutical intermediate suppliers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 1,503 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 17, 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.

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 pharmaceutical intermediate suppliers, 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 pharmaceutical intermediate suppliers are there based in the United States?

RevenueBase identified 214 pharmaceutical intermediate suppliers headquartered in the United States 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?

SPI Pharma, headquartered in Wilmington, tops this list with the largest team on record.

Which city has the most pharmaceutical intermediate suppliers?

San Diego leads with 10 headquartered companies, followed by Durham (4) and Paramus (4).

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 1,503 verified decision-maker contacts tracked across these 214 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 17, 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.