S&P Midcap 400 Index (MID) Companies by Market Cap

The S&P Midcap 400 Index (MID) tracks 401 constituent companies with a combined market cap of $3.44 Trillion, covering the largest publicly traded companies in USA. This ranking lists all MID index holdings ordered by market capitalization — from the largest index heavyweights to smaller constituents. Updated daily with live market data.

Total Market Cap (USD)

$3.44 Trillion

Constituent Companies

401

Index Country

USA
Rank Company Weight (%) Market Cap (USD) Sector Industry Price 24h Change
1 Comfort Systems USA Inc
NYSE:FIX 		0.48% $60.86 Billion Industrials Engineering & Construction $1729.69 +1.88%
2 Lumentum Holdings Inc
NASDAQ:LITE 		0.15% $55.54 Billion Technology Communication Equipment $713.94 +2.99%
3 Ciena Corp
NYSE:CIEN 		0.33% $53.31 Billion Technology Communication Equipment $377.05 +1.34%
4 Coherent Inc
NYSE:COHR 		0.34% $51.43 Billion Technology Scientific & Technical Instruments $262.89 +5.55%
5 Flex Ltd
NASDAQ:FLEX 		0.45% $41.68 Billion Technology Electronic Components $113.75 +1.64%
6 Interactive Brokers Group Inc
NASDAQ:IBKR 		0.71% $39.20 Billion Financial Services Capital Markets $87.99 -2.75%
7 EMCOR Group Inc
NYSE:EME 		0.69% $35.44 Billion Industrials Engineering & Construction $797.43 -0.62%
8 Caseys General Stores Inc
NASDAQ:CASY 		0.65% $28.11 Billion Consumer Cyclical Specialty Retail $871.00 +0.40%
9 Curtiss-Wright Corporation
NYSE:CW 		0.47% $26.05 Billion Industrials Aerospace & Defense $724.00 +1.02%
10 Carpenter Technology Corporation
NYSE:CRS 		0.33% $25.82 Billion Industrials Metal Fabrication $519.66 +3.17%
11 XPO Logistics Inc
NYSE:XPO 		0.45% $23.60 Billion Industrials Trucking $200.97 +0.86%
12 Pure Storage Inc
NYSE:PSTG 		0.52% $22.11 Billion Technology Computer Hardware $66.97 -1.22%
13 Woodward Inc
NASDAQ:WWD 		0.39% $21.51 Billion Industrials Aerospace & Defense $360.75 +1.25%
14 United Therapeutics Corporation
NASDAQ:UTHR 		0.50% $21.42 Billion Healthcare Drug Manufacturers - Specialty & Generic $517.71 -1.54%
15 MasTec Inc
NYSE:MTZ 		0.28% $20.76 Billion Industrials Engineering & Construction $263.10 -18.91%
16 Reliance Steel & Aluminum Co
NYSE:RS 		0.60% $20.51 Billion Basic Materials Steel $406.10 +1.27%
17 Roivant Sciences Ltd
NASDAQ:ROIV 		0.16% $20.44 Billion Healthcare Biotechnology $33.91 -1.77%
18 US Foods Holding Corp
NYSE:USFD 		0.57% $20.40 Billion Consumer Defensive Food Distribution $100.59 +0.04%
19 MKS Instruments Inc
NASDAQ:MKSI 		0.17% $20.09 Billion Technology Scientific & Technical Instruments $297.45 +1.41%
20 Allegheny Technologies Incorporated
NYSE:ATI 		0.26% $19.84 Billion Industrials Metal Fabrication $187.44 +3.05%
21 Synnex Corporation
NYSE:SNX 		0.31% $19.28 Billion Technology Electronics & Computer Distribution $255.70 +1.42%
22 MACOM Technology Solutions Holdings Inc
NASDAQ:MTSI 		0.24% $19.18 Billion Technology Semiconductors $251.44 +1.10%
23 RB Global Inc.
NYSE:RBA 		0.70% $18.96 Billion Industrials Specialty Business Services $109.74 -0.25%
24 Burlington Stores Inc
NYSE:BURL 		0.61% $18.67 Billion Consumer Cyclical Apparel Retail $368.48 -1.00%
25 Illumina Inc
NASDAQ:ILMN 		0.45% $18.34 Billion Healthcare Diagnostics & Research $205.10 +0.00%
26 Entegris Inc
NASDAQ:ENTG 		0.41% $18.13 Billion Technology Semiconductor Equipment & Materials $119.05 +1.66%
27 ITT Inc
NYSE:ITT 		0.40% $17.52 Billion Industrials Specialty Industrial Machinery $195.98 +1.54%
28 RBC Bearings Incorporated
NYSE:RBC 		0.40% $17.43 Billion Industrials Tools & Accessories $551.31 -1.88%
29 Lattice Semiconductor Corporation
NASDAQ:LSCC 		0.23% $17.03 Billion Technology Semiconductors $124.27 -0.21%
30 Tenet Healthcare Corporation
NYSE:THC 		0.48% $16.87 Billion Healthcare Medical Care Facilities $254.78 +0.81%
31 Royal Gold Inc
NASDAQ:RGLD 		0.45% $16.83 Billion Basic Materials Gold $198.35 -2.31%
32 Ovintiv Inc
NYSE:OVV 		0.33% $16.74 Billion Energy Oil & Gas E&P $62.46 +1.36%
33 WESCO International Inc
NYSE:WCC 		0.26% $16.73 Billion Industrials Industrial Distribution $343.49 +0.24%
34 East West Bancorp Inc
NASDAQ:EWBC 		0.39% $16.70 Billion Financial Services Banks - Regional $131.00 +0.07%
35 Carlyle Group Inc
NASDAQ:CG 		0.31% $16.57 Billion Financial Services Asset Management $46.02 +1.46%
36 nVent Electric PLC
NYSE:NVT 		0.32% $16.41 Billion Industrials Electrical Equipment & Parts $153.83 +6.24%
37 W P Carey Inc
NYSE:WPC 		0.49% $16.39 Billion Real Estate REIT - Diversified $73.60 -0.65%
38 Annaly Capital Management, Inc.
NYSE:NLY 		0.40% $15.91 Billion Real Estate REIT - Mortgage $22.72 -1.56%
39 Fabrinet
NYSE:FN 		0.26% $15.60 Billion Technology Electronic Components $435.41 -0.89%
40 BWX Technologies Inc
NYSE:BWXT 		0.37% $15.46 Billion Industrials Aerospace & Defense $168.70 +1.88%
41 Medpace Holdings Inc
NASDAQ:MEDP 		0.28% $15.19 Billion Healthcare Diagnostics & Research $577.11 -0.21%
42 Performance Food Group Co
NYSE:PFGC 		0.47% $14.78 Billion Consumer Defensive Food Distribution $114.39 -0.31%
43 Omega Healthcare Investors Inc
NYSE:OHI 		0.42% $14.71 Billion Real Estate REIT - Healthcare Facilities $50.63 +0.46%
44 Clean Harbors Inc
NYSE:CLH 		0.39% $14.71 Billion Industrials Waste Management $312.88 -1.35%
45 EchoStar Corporation
NASDAQ:SATS 		0.11% $14.58 Billion Technology Communication Equipment $92.03 -4.14%
46 Pinnacle Financial Partners, Inc.
NASDAQ:PNFP 		0.28% $14.43 Billion Financial Services Banks - Regional $98.44 +0.81%
47 Jones Lang LaSalle Incorporated
NYSE:JLL 		0.40% $14.18 Billion Real Estate Real Estate Services $355.03 -1.85%
48 Jazz Pharmaceuticals PLC
NASDAQ:JAZZ 		0.25% $14.17 Billion Healthcare Biotechnology $252.86 -2.14%
49 Lincoln Electric Holdings Inc
NASDAQ:LECO 		0.40% $14.12 Billion Industrials Tools & Accessories $261.31 +4.43%
50 Lamar Advertising Company
NASDAQ:LAMR 		0.38% $13.93 Billion Real Estate REIT - Specialty $159.96 -0.43%

Complete list of all companies in the MID index ranked by market capitalization. Track index constituent performance and market values. View all indices