Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Latest available · not live
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Information Technology
Semiconductors18.63%+3.92 ppApplication Software1.82%-1.73 ppTechnology Hardware, Storage & Peripherals9.60%+1.63 ppSemiconductor Materials & Equipment1.95%+1.21 ppCommunications Equipment1.54%+0.44 ppSystems Software7.87%-0.41 ppIT Consulting & Other Services0.61%-0.34 ppElectronic Components0.49%+0.20 ppElectronic Manufacturing Services0.22%+0.04 ppInternet Services & Infrastructure0.09%-0.02 ppTechnology Distributors0.03%-0.01 ppElectronic Equipment & Instruments0.24%-0.01 pp
3 · Sub-industry
Inside Semiconductors
Semiconductors · weight
18.63%
Industry change · 12M
+3.92 pp
Semiconductors · contribution
+3.925 pp
Company participation
60%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2026 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Micron Technology → MU | United States | $1202.9bn | 2.021% | -0.244 pp | +1.646 pp | +537.6% | Yes |
| Advanced Micro Devices → AMD | United States | $998.7bn | 1.678% | +0.032 pp | +1.152 pp | +278.1% | Yes |
| Intel → INTC | United States | $606.4bn | 1.019% | -0.201 pp | +0.725 pp | +258.4% | Yes |
| Marvell Technology → MRVL | United States | $231.7bn | 0.389% | -0.064 pp | +0.389 pp | +214.9% | Yes |
| Broadcom → AVGO | United States | $1676.5bn | 2.816% | -0.307 pp | -0.302 pp | +7.2% | No |
| Nvidia → NVDA | United States | $5504.0bn | 9.246% | +0.832 pp | +0.170 pp | +22.7% | Yes |
| Texas Instruments → TXN | United States | $255.8bn | 0.430% | -0.042 pp | +0.095 pp | +56.4% | Yes |
| Analog Devices → ADI | United States | $192.2bn | 0.323% | -0.013 pp | +0.081 pp | +63.5% | Yes |
| Qualcomm → QCOM | United States | $193.2bn | 0.325% | -0.014 pp | -0.035 pp | +12.9% | Yes |
| Monolithic Power Systems → MPWR | United States | $66.2bn | 0.111% | -0.007 pp | +0.023 pp | +47.3% | No |
| First Solar → FSLR | United States | $18.8bn | 0.032% | -0.012 pp | -0.016 pp | -20.6% | No |
| NXP Semiconductors → NXPI | United States | $60.0bn | 0.101% | -0.023 pp | -0.014 pp | +6.1% | No |
| ON Semiconductor → ON | United States | $29.9bn | 0.050% | -0.014 pp | +0.010 pp | +55.9% | No |
| Microchip Technology → MCHP | United States | $42.2bn | 0.071% | -0.015 pp | +0.002 pp | +24.3% | No |
| Skyworks Solutions → SWKS | United States | $12.9bn | 0.022% | +0.004 pp | -0.001 pp | +14.6% | Yes |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.