This Week in the Chain — Aug 17, 2026

Top gainers

Here is what actually moved. Since Aug 10, 2026, 368 companies repriced by 1% or more, measured on live market caps rather than a smoothed average.

1. 1Netlist$1.3B → $2.0B+49.6%
2. 2Wafer Works$1.7B → $2.3B+33.9%
3. 3Global Unichip (GUC)$18.8B → $24.6B+30.8%
4. 4Aehr Test Systems$3.4B → $4.4B+30.1%
5. 5Super Micro Computer$20.1B → $25.8B+28.0%
6. 6LB Semicon$180M → $230M+27.8%
7. 7ASE Technology$82.2B → $103.0B+25.2%
8. 8Sequans Communications$40M → $50M+25.0%

Source: wafergraph live market caps (Yahoo Finance × SEC shares). As of 2026-08-17.

Coverage changes

Coverage, measured against Aug 10, 2026. This is the unglamorous number, and it is the one that decides whether everything above it is worth anything.

Source: wafergraph dataset. As of 2026-08-17.

Top decliners

1. 1Chilisin Electronics$150M → $120M-20.0%
2. 2Alpha and Omega Semiconductor$1.1B → $920M-14.8%
3. 3ULVAC$2.8B → $2.4B-14.1%
4. 4Coherent$74.2B → $63.8B-14.0%
5. 5WPG Holdings$6.8B → $5.9B-13.4%
6. 6Ceva$1.1B → $940M-13.0%
7. 7Aeva Technologies$1.9B → $1.6B-12.9%
8. 8JEOL$2.6B → $2.3B-11.7%

Source: wafergraph live market caps. As of 2026-08-17.

US-listed gainers

Same threshold, now narrowed to companies whose live price comes from a US listing — NASDAQ, NYSE or OTC. That includes US-traded ADRs of foreign companies like TSMC and ASML. The filter is where the stock trades, not where the company sits.

1. 1Netlist$1.3B → $2.0B+49.6%
2. 2Aehr Test Systems$3.4B → $4.4B+30.1%
3. 3Super Micro Computer$20.1B → $25.8B+28.0%
4. 4ASE Technology$82.2B → $103.0B+25.2%
5. 5Sequans Communications$40M → $50M+25.0%

Source: wafergraph live market caps (Yahoo Finance × SEC shares). As of 2026-08-17.

US-listed decliners

1. 1Alpha and Omega Semiconductor$1.1B → $920M-14.8%
2. 2Coherent$74.2B → $63.8B-14.0%
3. 3Ceva$1.1B → $940M-13.0%
4. 4Aeva Technologies$1.9B → $1.6B-12.9%
5. 5QuickLogic$260M → $230M-11.5%

Source: wafergraph live market caps. As of 2026-08-17.

Why it matters

Place it before you read anything into it. Netlist's segment is Memory — Memory chips — DRAM, NAND flash, and the emerging high-bandwidth memory (HBM) used in AI accelerators — are the highest-volume semiconductor category by revenue. The segment is an oligopoly: Samsung, SK hynix, and Micron make almost all DRAM; Samsung, SK hynix, Kioxia, and SanDisk dominate NAND. HBM is the current growth flashpoint, with SK hynix supplying the majority of HBM to NVIDIA. Memory is also highly cyclical, with pricing swings that affect the broader supply chain's financial health.

Segment context from the wafergraph taxonomy.