What Celestica makes for data centers
public · celestica.com
Celestica is a publicly listed company. It appears on 3 parts of the AI data center — Switch systems & white-box ODMs, Optics contract manufacturing and EMS, system integration & rack-level test — in the roles of odm and manufacturer. Those parts sit in Layer 3 — Networking & interconnect and Layer 4 — Servers, racks & integration. Its shares trade on US exchanges (NYSE/Nasdaq) as CLS.
Parts, by layer
Layer 3 — Networking & interconnect
| Part | Role | Confidence | Competitors | Note |
|---|---|---|---|---|
| Switch systems & white-box ODMs | odm | disclosed | Quanta Computer, Accton (Edgecore), Alpha Networks, Arista, Cisco, Dell | |
| Optics contract manufacturing | manufacturer | inferred | Fabrinet, Flex, Jabil, Sanmina |
Layer 4 — Servers, racks & integration
| Part | Role | Confidence | Competitors | Note |
|---|---|---|---|---|
| EMS, system integration & rack-level test | manufacturer | inferred | Quanta Computer, Benchmark, Compal, Flex, Foxconn (Hon Hai), Inventec |
Where Celestica sits in the stack
Celestica's placements in this catalog cover 3 parts, from layer 3 (networking & interconnect) to layer 4 (servers, racks & integration). None of them currently carries a sourced supply constraint tag. Across these parts it overlaps with other companies most often on the lines below.
What these parts are
- Switch systems & white-box ODMs — The physical switches — built by branded vendors and white-box ODMs — that house scale-out switch ASICs and connect racks into a cluster fabric.
- Optics contract manufacturing — Contract manufacturers that assemble and test optical transceivers on behalf of module brands and switch vendors.
- EMS, system integration & rack-level test — Electronics manufacturing services firms assemble, wire and burn-in the finished server or rack before it ships, standing between the ODM board build and the customer's data center floor.
Closest peers in this catalog
Seen in real machines
Celestica is named in 2 of the rack teardowns and supercomputer breakdowns on this site. Each line below is a piece of that machine.
- AMD Helios (MI455X) · rack teardown
- Rack integration, ODM and OEM systems (scale-up switch R&D, design and manufacturing)
- Scale-up switch tray (2x Broadcom Tomahawk 6 ASICs per tray, UALink-over-Ethernet, 21.6 TB/s bidirectional per switch) (R&D, design and manufacturing of the reference-design switch)
- Google TPU7x (Ironwood) · rack teardown
- Board assembly and rack integration* (primary board assembly and rack integration partner)
- Optical circuit switch fabric ("Apollo" — MEMS mirrors, connects cubes into pods and superpods)* (also manufactures the OCS units themselves)
Disclosed customers
Questions about Celestica
- What does Celestica make for AI data centers?
- This catalog places Celestica on 3 parts: Switch systems & white-box ODMs (odm), Optics contract manufacturing (manufacturer) and EMS, system integration & rack-level test (manufacturer).
- Is Celestica publicly traded?
- Yes — Celestica is listed on US exchanges (NYSE/Nasdaq) under CLS. Prices shown on this page are a nightly snapshot, not real-time, and nothing here is investment advice.
- Who else makes switch systems & white-box ODMs for AI data centers?
- Quanta Computer, Accton (Edgecore), Alpha Networks, Arista, Cisco and Dell are also placed on Switch systems & white-box ODMs in this catalog.
- How well sourced are these placements?
- Every part→company placement carries a confidence tag. For Celestica the mix is 1 disclosed and 2 inferred. "disclosed" means the company or a filing says so; "reported" comes from trade press or a reference-design list; "inferred" is a lead from the taxonomy with no citation yet. Treat reported and inferred as leads, not facts.
Answers are generated from this catalog's own rows — see sources & method.