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
Systems Software4.49%-2.69 ppTechnology Hardware, Storage & Peripherals5.94%-2.26 ppApplication Software1.63%-1.54 ppIT Consulting & Other Services0.57%-0.61 ppSemiconductor Materials & Equipment0.91%+0.36 ppSemiconductors10.63%+0.25 ppElectronic Components0.35%+0.16 ppElectronic Equipment & Instruments0.18%-0.12 ppInternet Services & Infrastructure0.07%-0.07 ppCommunications Equipment0.95%-0.07 ppTechnology Distributors0.02%-0.03 ppElectronic Manufacturing Services0.13%-0.01 pp
3 · Sub-industry
Inside Semiconductor Materials & Equipment
Semiconductor Materials & Equipment · weight
0.91%
Industry change · 12M
+0.36 pp
Semiconductor Materials & Equipment · contribution
+0.360 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 |
|---|---|---|---|---|---|---|---|
| Lam Research → LRCX | United States | $266.8bn | 0.389% | -0.033 pp | +0.167 pp | +196.0% | No |
| Applied Materials → AMAT | United States | $271.2bn | 0.395% | -0.004 pp | +0.115 pp | +137.6% | No |
| Teradyne → TER | United States | $46.4bn | 0.068% | +0.008 pp | +0.036 pp | +260.2% | Yes |
| Qnity Electronics → Q | United States | $24.2bn | 0.035% | +0.002 pp | +0.035 pp | +0.0% | Yes |
| KLA Corporation → KLAC | United States | $19.3bn | 0.028% | -0.003 pp | +0.007 pp | +118.2% | 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.