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 $3.42 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)

$3.42 Trillion

Constituent Companies

401

Index Country

USA
Rank Company Weight (%) Market Cap (USD) Sector Industry Price 24h Change
1 Lumentum Holdings Inc
NASDAQ:LITE 		0.15% $73.98 Billion Technology Communication Equipment $835.03 -9.92%
2 Comfort Systems USA Inc
NYSE:FIX 		0.48% $55.71 Billion Industrials Engineering & Construction $1582.80 -6.39%
3 Coherent Inc
NYSE:COHR 		0.34% $52.14 Billion Technology Scientific & Technical Instruments $266.50 -12.73%
4 Ciena Corp
NYSE:CIEN 		0.33% $45.25 Billion Technology Communication Equipment $319.64 -8.55%
5 Interactive Brokers Group Inc
NASDAQ:IBKR 		0.71% $41.12 Billion Financial Services Capital Markets $90.75 -0.68%
6 Flex Ltd
NASDAQ:FLEX 		0.45% $39.69 Billion Technology Electronic Components $108.32 -6.44%
7 EMCOR Group Inc
NYSE:EME 		0.69% $33.32 Billion Industrials Engineering & Construction $749.70 -3.97%
8 Allegheny Technologies Incorporated
NYSE:ATI 		0.26% $25.62 Billion Industrials Metal Fabrication $188.15 -5.34%
9 Caseys General Stores Inc
NASDAQ:CASY 		0.65% $22.97 Billion Consumer Cyclical Specialty Retail $621.61 +1.00%
10 Pure Storage Inc
NYSE:PSTG 		0.52% $22.11 Billion Technology Computer Hardware $66.97 -1.22%
11 United Therapeutics Corporation
NASDAQ:UTHR 		0.50% $21.42 Billion Healthcare Drug Manufacturers - Specialty & Generic $502.70 +1.12%
12 XPO Logistics Inc
NYSE:XPO 		0.45% $21.13 Billion Industrials Trucking $180.49 -0.93%
13 Tenet Healthcare Corporation
NYSE:THC 		0.48% $20.93 Billion Healthcare Medical Care Facilities $264.51 +0.31%
14 Carpenter Technology Corporation
NYSE:CRS 		0.33% $20.89 Billion Industrials Metal Fabrication $420.38 -5.15%
15 Synnex Corporation
NYSE:SNX 		0.31% $20.73 Billion Technology Electronics & Computer Distribution $261.12 -3.01%
16 Roivant Sciences Ltd
NASDAQ:ROIV 		0.16% $20.44 Billion Healthcare Biotechnology $41.02 +0.49%
17 US Foods Holding Corp
NYSE:USFD 		0.57% $20.40 Billion Consumer Defensive Food Distribution $94.80 -0.57%
18 Curtiss-Wright Corporation
NYSE:CW 		0.47% $20.32 Billion Industrials Aerospace & Defense $551.21 -1.38%
19 Royal Gold Inc
NASDAQ:RGLD 		0.45% $20.28 Billion Basic Materials Gold $248.34 -1.56%
20 Entegris Inc
NASDAQ:ENTG 		0.41% $19.64 Billion Technology Semiconductor Equipment & Materials $128.52 -8.44%
21 Reliance Steel & Aluminum Co
NYSE:RS 		0.60% $19.61 Billion Basic Materials Steel $384.23 -2.53%
22 Woodward Inc
NASDAQ:WWD 		0.39% $19.36 Billion Industrials Aerospace & Defense $324.67 -3.73%
23 Illumina Inc
NASDAQ:ILMN 		0.45% $18.34 Billion Healthcare Diagnostics & Research $208.21 +0.85%
24 MACOM Technology Solutions Holdings Inc
NASDAQ:MTSI 		0.24% $18.30 Billion Technology Semiconductors $239.62 -12.83%
25 MasTec Inc
NYSE:MTZ 		0.28% $17.97 Billion Industrials Engineering & Construction $227.70 -5.29%
26 ITT Inc
NYSE:ITT 		0.40% $17.84 Billion Industrials Specialty Industrial Machinery $199.50 -2.27%
27 East West Bancorp Inc
NASDAQ:EWBC 		0.39% $17.79 Billion Financial Services Banks - Regional $129.81 +0.50%
28 CNH Industrial N.V.
NYSE:CNH 		0.39% $17.02 Billion Industrials Farm & Heavy Construction Machinery $13.75 +1.25%
29 Permian Resources Corporation
NYSE:PR 		0.27% $16.88 Billion Energy Oil & Gas E&P $23.76 -0.08%
30 Ovintiv Inc
NYSE:OVV 		0.33% $16.74 Billion Energy Oil & Gas E&P $65.36 +2.62%
31 Annaly Capital Management, Inc.
NYSE:NLY 		0.40% $16.46 Billion Real Estate REIT - Mortgage $21.84 -0.27%
32 nVent Electric PLC
NYSE:NVT 		0.32% $16.41 Billion Industrials Electrical Equipment & Parts $146.64 -9.69%
33 WESCO International Inc
NYSE:WCC 		0.26% $16.41 Billion Industrials Industrial Distribution $336.73 -5.50%
34 Medpace Holdings Inc
NASDAQ:MEDP 		0.28% $16.36 Billion Healthcare Diagnostics & Research $595.41 +1.34%
35 Clean Harbors Inc
NYSE:CLH 		0.39% $16.27 Billion Industrials Waste Management $322.99 +0.05%
36 MKS Instruments Inc
NASDAQ:MKSI 		0.17% $16.16 Billion Technology Scientific & Technical Instruments $239.27 -10.49%
37 Reinsurance Group of America
NYSE:RGA 		0.46% $16.08 Billion Financial Services Insurance - Reinsurance $249.05 +0.13%
38 Jones Lang LaSalle Incorporated
NYSE:JLL 		0.40% $15.81 Billion Real Estate Real Estate Services $343.55 -0.99%
39 RB Global Inc.
NYSE:RBA 		0.70% $15.65 Billion Industrials Specialty Business Services $84.03 +0.51%
40 W P Carey Inc
NYSE:WPC 		0.49% $15.41 Billion Real Estate REIT - Diversified $69.19 +0.10%
41 Aramark Holdings
NYSE:ARMK 		0.35% $15.18 Billion Industrials Specialty Business Services $58.53 -0.03%
42 RBC Bearings Incorporated
NYSE:RBC 		0.40% $15.16 Billion Industrials Tools & Accessories $478.81 -3.24%
43 Lattice Semiconductor Corporation
NASDAQ:LSCC 		0.23% $15.13 Billion Technology Semiconductors $106.50 -11.07%
44 Carlyle Group Inc
NASDAQ:CG 		0.31% $14.90 Billion Financial Services Asset Management $41.82 -1.23%
45 Performance Food Group Co
NYSE:PFGC 		0.47% $14.63 Billion Consumer Defensive Food Distribution $93.16 -0.83%
46 Burlington Stores Inc
NYSE:BURL 		0.61% $14.59 Billion Consumer Cyclical Apparel Retail $232.24 -2.84%
47 EchoStar Corporation
NASDAQ:SATS 		0.11% $14.58 Billion Technology Communication Equipment $92.03 -4.14%
48 Unum Group
NYSE:UNM 		0.48% $14.47 Billion Financial Services Insurance - Life $94.92 +0.53%
49 Pinnacle Financial Partners, Inc.
NASDAQ:PNFP 		0.28% $14.43 Billion Financial Services Banks - Regional $98.44 +0.81%
50 Jazz Pharmaceuticals PLC
NASDAQ:JAZZ 		0.25% $14.17 Billion Healthcare Biotechnology $245.87 +0.03%

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