网络互联
Interconnect, switching, and high-speed data-movement silicon linking compute clusters.
需求为什么传导到这里
一次前沿训练要让几万块加速器表现得像一台机器。由此形成一套独立的层级：封装内互连、机架内 scale-up、机架间 scale-out，以及承载它们的交换机和网卡。这是一个一级产业，不是半导体下面的一个脚注。
瓶颈在哪
集群规模的上限，越来越取决于网络能撑到多大，而不是能买到多少加速器。
这是关于供应商集中度与交期的结构性观察，不是对任何标的的看法。
本层级的公司
- MRVL受益
Data-center interconnect and networking silicon.
- ANET受益
Datacenter switching systems used in large AI cluster fabrics.
- AVGO受益
Merchant switch silicon and datacenter networking components.
- ALAB受益
Connectivity semiconductors for accelerator and memory interconnect.
- CRDO受益
High-speed connectivity products for datacenter interconnect.
- CSCO中性
Enterprise and service-provider networking broadly; AI datacenter fabric is one segment.
- APH受益
High-speed interconnect, cable assemblies, and connectors for datacenter systems.
引用这些标的的公开 13F 申报
供研究参考，不构成任何推荐。以下是已向 SEC 存档的事实；把某个标的归入本层级是我们的分类，申报人并未作出这样的表述。
- ARK Investment Managementreported a position inAVGOForm 13F-HR for the period ending 2026-06-30, filed 2026-08-14 · SEC filing
- Appaloosa Managementreported a position inAVGOForm 13F-HR for the period ending 2026-06-30, filed 2026-08-14 · SEC filing
- Bridgewater Associatesreported a position inAVGOForm 13F-HR for the period ending 2026-06-30, filed 2026-08-14 · SEC filing
- Coatue Managementreported a position inAVGOForm 13F-HR for the period ending 2026-06-30, filed 2026-08-14 · SEC filing
- Fundstrat Capitalreported a position inAVGOForm 13F-HR for the period ending 2026-06-30, filed 2026-08-13 · SEC filing
- Tiger Global Managementreported a position inAVGOForm 13F-HR for the period ending 2026-06-30, filed 2026-08-14 · SEC filing
下列条目来自 SEC 公开的 Form 13F-HR 申报，由申报主体就所示期间申报、并在其后提交 —— 它们不是当前持仓。Form 13F 仅覆盖美股多头头寸：不含空头、现金、非美资产和大多数衍生品，且申报的头寸可能已被卖出。把某个标的归入某一层级是 XingAI 的分类，不是申报人的。此处没有任何推荐，机构申报持有某标的也不构成你持有它的理由。
同一赛道
Descriptive positioning only. `stance` says whether a company's business is exposed to a layer, never whether to buy it. Layers with no exposure are not recommendations to add any.