Do you show sector history or returns?

No. Combined market cap is a size snapshot. It can change because companies got larger or smaller, names crossed the floor, or the mix of constituents changed. That is not a cap-weighted or equal-weighted sector return, and we do not persist constituent dates.

Who is the largest Healthcare company?

As of September 22, 2026, Eli Lilly and Company (LLY) is the largest at $1.1T — 12.07% of the sector.

Which industry is largest in Healthcare?

As of September 22, 2026, Drug Manufacturers - General is the largest industry slice by combined market cap (46.45% of the sector, 16 companies). Industry labels are not remapped.

How concentrated is Healthcare?

The three largest companies are 24.31% of the sector. The ten largest are 45.07%. Median company size is $4.07B. Combined size is not a forecast.

Largest Healthcare companies by market cap

Q: Which companies are included?

MarketCapLens includes common equity listed on NASDAQ, NYSE, or AMEX that clears the $1B market-cap floor and is actively trading. ETFs, funds, preferred shares, equity units, and warrants are excluded. Dual share classes of the same company are counted once.

Healthcare groups drug makers, device companies, insurers, and care providers under one industry-group label — not a single product cycle and not the same as a biotech index. Combined size is not a sector return. See how the ranking works.

368 U.S.-listed Healthcare companies with a market cap of at least $1B are ranked here by market capitalization, worth a combined $9.13T — 9.05% of the total market tracked on MarketCapLens. The most valuable is Eli Lilly and Company at $1.1T. As of September 22, 2026. Size ranking for research, not a sector recommendation.

Companies

368

Combined market cap

$9.13T

Share of total

9.05%

Largest

LLY

Median size

$4.07B

Top 3

24.31%

Companies ranked by market cap

Healthcare companies ranked by market capitalization. Sortable by column.
#	Company	Market cap	Price	1D %	Volume

Largest industries in Healthcare

Industries in Healthcare by combined market cap, company count, and share of the sector.
Industry	Companies	Combined cap	% of sector
Drug Manufacturers - General	16	$4.24T	46.45%
Biotechnology	170	$1.24T	13.58%
Medical - Diagnostics & Research	27	$875.8B	9.59%
Medical - Devices	39	$757.6B	8.30%
Medical - Healthcare Plans	11	$709.42B	7.77%
Medical - Instruments & Supplies	25	$394.23B

Concentration

The largest company, Eli Lilly and Company (LLY), is 12.07% of Healthcare. The three largest — Eli Lilly and Company (LLY), Johnson & Johnson (JNJ), and AbbVie Inc. (ABBV) — are 24.31% of the sector. The ten largest are 45.07%. Eli Lilly and Company is classified as Drug Manufacturers - General, which is also the largest industry in this sector by combined cap.

Frequently asked questions

What is the Healthcare sector?

Healthcare groups drug makers, device companies, insurers, and care providers under one industry-group label — not a single product cycle and not the same as a biotech index.

How are companies classified?

Each ranking row has one sector string from Financial Modeling Prep (GICS-style groups). MarketCapLens does not license GICS or remap those labels. A company belongs to one sector. Sectors with fewer than 3 companies above the $1B floor are omitted.

How is sector market cap calculated?

Sector market cap is the sum of each constituent company's market cap. A company's weight is its market cap divided by that sector total. Share of tracked market cap is this sector versus every company on MarketCapLens, including untagged names.

Which companies are included?