Company Atlas

Who runs, owns and works at every S&P 500 company: 8,125 directors and officers, the largest institutional holders and the headcount from each 10-K, all from SEC filings.

Headlines

Total market cap: $69.54T; 500 companies at 23 Oct 2026
Worth $1 trillion or more: 10; Companies
People at 2+ companies: 952; Of 8,125 directors and officers
Companies sharing people: 466; 34 share no one

The ten largest companies make up 40% of the S&P 500's combined value, up from 23% in January 2016. Nvidia and Apple are each worth more than $5 trillion.

The ten largest companies' share of combined market cap

Today's members only, from the week each joined the index. Before 2016, when fewer of them were in it, the line runs high.

Every four weeks, up to 23 Oct 2026

The last reading of each year, and the latest week
Week ending	Top ten's share
23 Oct 2026	39.6%
12 Dec 2025	40.6%
13 Dec 2024	38.9%
15 Dec 2023	33.4%
16 Dec 2022	27.0%
17 Dec 2021	32.5%
18 Dec 2020	30.4%
20 Dec 2019	25.9%
21 Dec 2018	24.5%
22 Dec 2017	24.0%
23 Dec 2016	22.4%
25 Dec 2015	22.8%
26 Dec 2014	21.9%
27 Dec 2013	22.2%
28 Dec 2012	23.6%
30 Dec 2011	24.9%
31 Dec 2010	23.5%
4 Dec 2009	25.2%
5 Dec 2008	29.6%

Download the series as JSON (top10Shares, in percent, one reading every four weeks from 5 Dec 2008).

All S&P 500 companies

Market data on 23 Oct 2026. Board roles filed up to 30 Sep 2026.

Sector

500 companies

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Nvidia NVDA	Information Technology	$5.08T	-1.5%	$216B	23.5	42,000	2
Apple AAPL	Information Technology	$5.07T	+1.2%	$416B	12.2	166,000	10
Alphabet GOOGL	Communication Services	$3.90T	-5.9%	$403B	9.7	190,820	4
Microsoft MSFT	Information Technology	$3.89T	-0.9%	$332B	11.7	223,000	16
Amazon AMZN	Consumer Discretionary	$2.68T	-0.8%	$717B	3.7	1,576,000	6
Meta Platforms META	Communication Services	$1.64T	-9.4%	$201B	8.2	78,865	7
Broadcom AVGO	Information Technology	$1.54T	-2.1%	$63.9B	24.0	33,000	3
Tesla TSLA	Consumer Discretionary	$1.47T	+4.9%	$94.8B	15.5	134,785	1
Berkshire Hathaway BRK-B	Financials	$1.16T	+1.9%	$371B	3.1	387,800	0
Eli Lilly LLY	Health Care	$1.14T	+1.3%	$65.2B	17.4	50,000	9
Micron Technology MU	Information Technology	$993B	-0.1%	$133B	7.5	61,000	7
Walmart WMT	Consumer Staples	$951B	+0.9%	$713B	1.3	2,100,000	14
JPMorgan Chase JPM	Financials	$881B	-2.4%	$182B	4.8	318,512	7
Advanced Micro Devices AMD	Information Technology	$844B	-2.3%	$34.6B	24.4	31,000	7
Visa V	Financials	$762B	+1.3%	$40.0B	19.0	34,100	14
ExxonMobil XOM	Energy	$753B	+2.4%	$332B	2.3	58,000	9
Johnson & Johnson JNJ	Health Care	$635B	+3.2%	$94.2B	6.7	138,200	12
Mastercard MA	Financials	$546B	+1.0%	$32.8B	16.7	39,800	11
AbbVie ABBV	Health Care	$505B	+1.1%	$61.2B	8.3	57,000	6
Palantir Technologies PLTR	Information Technology	$473B	+5.8%	$4.5B	106	4,429	0
Chevron CVX	Energy	$461B	+3.6%	$189B	2.4	-	14
Costco COST	Consumer Staples	$445B	+1.4%	$303B	1.5	355,000	2
Intel INTC	Information Technology	$439B	-3.2%	$52.9B	8.3	85,100	7
Cisco CSCO	Information Technology	$420B	-0.8%	$63.3B	6.6	82,400	10
The Coca-Cola Company KO	Consumer Staples	$399B	-1.3%	$47.9B	8.3	65,900	4

Showing 25 of 500 companies

About the data

Market cap is the closing price on 23 Oct 2026 times the shares outstanding, counting every share class. S&P weights the index by float, the shares available to trade, so these shares differ slightly from official index weights.
Week is the change in market cap from the previous Friday's close.
Revenue is the latest full fiscal year reported to the SEC in XBRL, so fiscal years end at different dates; an older year is marked, with an asterisk where a newer report exists. For banks it is net interest income plus fees and other income. Price to sales is market cap divided by that revenue.
Employees is the latest count from companiesmarketcap.com until each company's 10-K figure is in. 5 companies have no count yet and show a dash.
Connections are the other S&P 500 companies that share at least one director or officer with a company, from SEC Forms 3, 4 and 5. How links are counted.