This Week in the Chain — Oct 30, 2026

What it touches

A price chart never tells you who is upstream or downstream of a move. Here is who Kingsemi (-29.5%) is connected to.

1. 1SMICCustomer
2. 2Hua Hong SemiconductorCustomer

Top gainers

1. 1Vertiv (US-listed)$74.8B → $94.7B+26.6%
2. 2Flex Ltd. (US-listed)$28.3B → $34.4B+21.6%
3. 3Lumentum Holdings (US-listed)$68.5B → $83.3B+21.6%
4. 4Silicon Motion (US-listed)$6.3B → $7.7B+21.6%
5. 5Ultra Clean Holdings (US-listed)$2.0B → $2.5B+21.0%

Top decliners

377 companies moved at least 1% since Oct 25, 2026. That is price times shares outstanding, and it is not a view on any of them.

1. 1Kingsemi$8.1B → $5.7B-29.5%
2. 2Beijing Huafeng Test & Control (AccoTest)$8.3B → $6.1B-26.6%
3. 3Eoptolink Technology$54.6B → $41.2B-24.7%
4. 4Giantec Semiconductor$3.1B → $2.4B-22.5%
5. 5Shengyi Technology$40.4B → $31.8B-21.3%

Chokepoint spotlight

IQE: Leading epitaxial compound-semiconductor wafer maker (GaAs, GaN, InP). One of the most-connected names in its segment, in a standing weekly rotation, not fresh news.

1. 1Skyworks SolutionsDepends on it
2. 2QorvoDepends on it
3. 3BroadcomDepends on it
4. 4Lumentum HoldingsDepends on it
5. 5TSMCDepends on it

A standing feature that rotates weekly, not news.