Tier 1
Anchor general contractors: primary fab equipment and process control.
Owning the Semiconductor Bottleneck. The traditional semiconductor trade is crowded. Generic tech ETFs focus on designers and fabricators, but the real constraint is physical: backend infrastructure, high-purity systems, automated test, and advanced packaging.
The $STACK Index is a proprietary 20-ticker model portfolio built around the companies required to make next-generation silicon, 2.5D/3D packaging, HBM, and AI-ready chip capacity possible.
The thesis for $STACK was built from boots-on-the-ground experience constructing high-purity systems and infrastructure for major semiconductor fabs. The model is grounded in the physical job-site reality of the supply chain: tools, fluids, test benches, packaging lines, substrates, inspection systems, and reliability equipment.
Anchor general contractors: primary fab equipment and process control.
Systems and assembly subcontractors: packaging, OSAT, and automated testing.
High-purity process validation: metrology, inspection, cleaning, deposition, and wafer test.
Micro-cap speedboats: specialty thermal, reliability, coating, substrate, and fluid-delivery names.
The Raw Materials. Built for the independent trader who wants the master plan but runs their own book.
The Prime Contractor. Built for serious capital allocators who need the full data room and execution files.
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