This Week in the Chain — Jul 28, 2026

Top gainers

Since Jul 27, 2026, 323 companies priced at least 1% away from the prior snapshot.

1. 1Lingsen Precision$30M → $40M+33.3%
2. 2Ambarella$2.8B → $3.0B+5.7%
3. 3ASMedia Technology$3.2B → $3.3B+4.7%
4. 4QuickLogic$220M → $230M+4.5%
5. 5Allegro MicroSystems$8.4B → $8.7B+4.3%
6. 6Wolfspeed$1.2B → $1.2B+4.2%
7. 7Aehr Test Systems$2.4B → $2.5B+4.1%
8. 8Aeva Technologies$1.0B → $1.1B+4.0%

Source: wafergraph live market caps (Yahoo Finance × SEC shares). As of 2026-07-28.

Top decliners

1. 1Nepes$280M → $230M-17.9%
2. 2Foosung$730M → $600M-17.8%
3. 3Eoptolink Technology$101.4B → $83.9B-17.2%
4. 4SUMCO$8.0B → $6.7B-16.6%
5. 5Daeduck Electronics$3.8B → $3.2B-15.9%
6. 6InnoLight Technology$177.9B → $149.8B-15.8%
7. 7LG Innotek$9.9B → $8.3B-15.7%
8. 8Wonik IPS$3.5B → $3.0B-14.8%

Source: wafergraph live market caps. As of 2026-07-28.

Coverage changes

Coverage, compared with Jul 27, 2026.

Source: wafergraph dataset. As of 2026-07-28.

Why it matters

Lingsen Precision's segment: OSAT — Outsourced semiconductor assembly and test (OSAT) companies package finished dies into the chips and modules that go into end products. As advanced packaging — chiplets, CoWoS, HBM stacking, and fan-out technologies — moves from niche to mainstream, OSATs have become strategic partners rather than commodity handlers. ASE Technology (which includes SPIL) is the world's largest OSAT; Amkor is a major player in advanced packaging in the Americas and Korea. TSMC and Samsung also offer advanced packaging in-house, competing directly with OSATs at the leading edge.

Segment context from the wafergraph taxonomy.