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
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Information Technology
Semiconductors15.05%+2.87 ppApplication Software2.98%-0.53 ppTechnology Hardware, Storage & Peripherals8.35%-0.51 ppSemiconductor Materials & Equipment0.94%+0.37 ppCommunications Equipment1.07%+0.25 ppIT Consulting & Other Services0.99%-0.15 ppElectronic Components0.31%+0.12 ppElectronic Equipment & Instruments0.23%-0.05 ppElectronic Manufacturing Services0.18%+0.05 ppInternet Services & Infrastructure0.10%-0.04 ppTechnology Distributors0.03%-0.02 ppSystems Software7.56%+0.02 pp
3 · Sub-industry
Inside Semiconductors
Semiconductors · weight
15.05%
Industry change · 12M
+2.87 pp
Semiconductors · contribution
+2.871 pp
Company participation
57%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2025 · 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 |
|---|---|---|---|---|---|---|---|
| Nvidia → NVDA | United States | $4531.9bn | 8.877% | -0.200 pp | +1.419 pp | +38.9% | No |
| Broadcom → AVGO | United States | $1641.0bn | 3.214% | +0.095 pp | +0.750 pp | +50.6% | No |
| Micron Technology → MU | United States | $321.2bn | 0.629% | +0.254 pp | +0.417 pp | +240.2% | Yes |
| Advanced Micro Devices → AMD | United States | $348.7bn | 0.683% | +0.157 pp | +0.238 pp | +77.3% | Yes |
| Intel → INTC | United States | $176.0bn | 0.345% | +0.051 pp | +0.149 pp | +84.0% | Yes |
| Texas Instruments → TXN | United States | $157.6bn | 0.309% | -0.026 pp | -0.079 pp | -4.5% | No |
| Qualcomm → QCOM | United States | $183.2bn | 0.359% | -0.001 pp | -0.028 pp | +13.8% | Yes |
| Analog Devices → ADI | United States | $132.8bn | 0.260% | +0.018 pp | +0.021 pp | +29.8% | Yes |
| Monolithic Power Systems → MPWR | United States | $43.4bn | 0.085% | -0.003 pp | +0.020 pp | +54.5% | Yes |
| ON Semiconductor → ON | United States | $21.8bn | 0.043% | +0.002 pp | -0.018 pp | -14.1% | Yes |
| Skyworks Solutions → SWKS | United States | $9.4bn | 0.018% | -0.004 pp | -0.014 pp | -25.5% | No |
| NXP Semiconductors → NXPI | United States | $54.6bn | 0.107% | -0.008 pp | -0.013 pp | +6.4% | No |
| First Solar → FSLR | United States | $28.0bn | 0.055% | +0.008 pp | +0.012 pp | +48.2% | Yes |
| Microchip Technology → MCHP | United States | $34.4bn | 0.067% | -0.002 pp | -0.002 pp | +14.6% | No |
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.