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
Universe›Information Technology›Semiconductor Materials & Equipment›Semiconductor Materials & Equipment
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Information Technology
Semiconductors17.20%+2.80 ppTechnology Hardware, Storage & Peripherals9.09%+2.20 ppSystems Software7.02%-1.93 ppApplication Software1.80%-1.89 ppSemiconductor Materials & Equipment1.53%+0.91 ppCommunications Equipment1.55%+0.46 ppIT Consulting & Other Services0.62%-0.37 ppElectronic Components0.47%+0.22 ppElectronic Manufacturing Services0.23%+0.06 ppElectronic Equipment & Instruments0.24%-0.03 ppInternet Services & Infrastructure0.09%-0.03 ppTechnology Distributors0.03%-0.02 pp
3 · Sub-industry
Inside Semiconductor Materials & Equipment
Semiconductor Materials & Equipment · weight
1.53%
Industry change · 12M
+0.91 pp
Semiconductor Materials & Equipment · contribution
+0.912 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 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 |
|---|---|---|---|---|---|---|---|
| Applied Materials → AMAT | United States | $403.1bn | 0.704% | +0.279 pp | +0.399 pp | +184.0% | Yes |
| Lam Research → LRCX | United States | $366.4bn | 0.640% | +0.202 pp | +0.384 pp | +210.7% | Yes |
| Teradyne → TER | United States | $57.5bn | 0.100% | +0.027 pp | +0.064 pp | +243.1% | Yes |
| Qnity Electronics → Q | United States | $27.5bn | 0.048% | +0.008 pp | +0.048 pp | +0.0% | Yes |
| KLA Corporation → KLAC | United States | $23.9bn | 0.042% | +0.011 pp | +0.017 pp | +109.3% | 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.