This Week in the Chain — Jul 21, 2026

Top gainers

Largest market-cap moves since Jul 20, 2026 (281 priced companies moved ≥1%). Figures are live market caps; moves reflect price action plus any share-count updates.

1. 1Hwatsing Technology$16.7B → $20.0B+20.1%
2. 2Hangzhou Changchuan Technology$24.9B → $29.9B+20.1%
3. 3Piotech$27.4B → $32.9B+20.0%
4. 4Kingsemi$8.9B → $10.7B+20.0%
5. 5Zhongke Feice Technology$15.9B → $19.0B+19.4%
6. 6AMEC (Advanced Micro-Fabrication)$48.6B → $57.9B+19.1%
7. 7Ningbo Jiangfeng Electronic Material (Konfoong)$8.1B → $9.7B+18.9%
8. 8Hua Hong Semiconductor$31.7B → $37.3B+17.9%

Source: wafergraph live market caps (Yahoo Finance × SEC shares). As of 2026-07-21.

Top decliners

1. 1Hansol Chemical$1.9B → $1.8B-5.9%
2. 2GlobalWafers$18.7B → $17.8B-4.8%
3. 3CoreWeave$41.7B → $39.9B-4.4%
4. 4QuickLogic$230M → $220M-4.3%
5. 5ASMedia Technology$3.4B → $3.2B-4.1%
6. 6Wafer Works$2.5B → $2.4B-3.6%
7. 7TTM Technologies$14.3B → $13.8B-3.2%
8. 8Rambus$11.2B → $10.9B-2.9%

Source: wafergraph live market caps. As of 2026-07-21.

Coverage changes

How the dataset's coverage shifted versus the last snapshot.

Source: wafergraph dataset. As of 2026-07-21.

Why it matters

Hwatsing Technology sits in Equipment (Front End) — Front-end equipment transforms raw wafers into patterned circuits through deposition, etch, lithography, ion implant, and cleaning steps. The segment contains some of the supply chain's most extreme chokepoints: ASML is the sole supplier of EUV scanners, Carl Zeiss SMT makes every optical column inside them, and TRUMPF supplies the laser sources. Beyond those monopolies, Applied Materials, Lam Research, Tokyo Electron, and KLA collectively cover most other critical process steps and together represent several hundred billion dollars in market value. Watch this segment for second-order supply-chain effects.

Segment context from the wafergraph taxonomy.