POET Technologies — customers

Updated: 2026-04-29 Status: ✓ Disclosed customers verified via POET press releases. NDA-protected engagements flagged ⚠. Cross-references: Partners · Competitors · Supply chain map · products

1. Customer-disclosure framing

POET’s optical engines sell into optical-module makers, design-services partners, switch-ASIC vendors with internal optical-engine programs, and (rarely) end-customer hyperscalers directly. The majority of customer engagements are NDA-protected and customer names are disclosed only when (a) the customer co-issues a press release, (b) a design win reaches a press-worthy milestone, or (c) SEC/SEDAR disclosure rules require naming.

POET’s CFO Thomas Mika has publicly described the customer pipeline in shareholder communications and trade-press interviews; the April 2026 Stocktwits interview is one such reference. ◐ Note that the Marvell-Celestial AI cancellation notice on 2026-04-23 cited “alleged disclosures of information related to the Purchase Order and shipping information in contravention of confidentiality obligations” — meaning POET will likely communicate even more cautiously about specific customers going forward. ✓

2. Disclosed customers (named in POET press releases)

2.1 Mentech Technology (China) — 800G + 1.6T transceiver-module customer

Disclosure date: 2024-09-12 ✓ (POET press release; Semiconductor Today)
Engagement: Mentech selected POET’s transmit and receive optical engines for 800G pluggable transceivers; placed purchase orders for engineering / initial-build samples
Mentech profile: One of the world’s largest suppliers of datacom and telecom components; ships 200G–800G optical modules into data-center networking infrastructure
Status as of mid-2026: Active; specific revenue contribution undisclosed ◐

2.2 Lessengers (Korea) — 800G + 1.6T 2×DR4 transceiver-module customer

Initial disclosure: Q2 2025 (POET earnings) — Lessengers committed to module development using POET 800G optical engines ✓
Expansion: 2026 (date TBD per release) — POET + Lessengers joint development of a 1.6T 2×DR4 optical transceiver module combining POET Optical Interposer engines with Lessengers’ Direct Optical Wiring technology; samples targeted for Q2 2026 ✓ (Stocktitan press release)
Lessengers profile: Korean optical-component company specializing in optical-interconnect technologies for AI clusters
Status as of mid-2026: Active development; Q2 2026 sample milestone

2.3 Semtech — 1.6T receiver platform customer / co-developer

Disclosure date: 2025-10-06 ✓ (POET press release; Semiconductor Today)
Engagement: Joint launch of 1.6T receiver optical engines integrating Semtech’s FiberEdge 200G/lane TIA technology onto POET’s Optical Interposer; immediate sampling availability for qualified customers
Semtech role: Both CMOS supplier (FiberEdge TIA chip) and co-marketing customer (jointly named in the receiver launch). This is more accurately described as a partner-and-customer hybrid (see Partners)
Variants: 1.6T DR8 (short-reach AI-cluster) and 1.6T 2×FR4 (longer-reach intra-datacenter)
Status as of mid-2026: Active sampling

2.4 Quantum Computing Inc (QCi) — 3.2 Tbps engine co-developer

Disclosure date: 2025-11-11 ✓ (POET press release)
Engagement: POET-funded co-development of 400G/lane TFLN modulators integrated onto POET’s Optical Interposer for 3.2 Tbps engines; H2 2026 completion target
QCi role: TFLN modulator chip supplier — also a partner-customer hybrid (see Partners)
Status as of mid-2026: Active development

2.5 Sivers Semiconductors — External Light Source (ELS) co-developer

Disclosure date: 2025-09-29 ✓ (POET press release)
Engagement: Co-development of ELS modules for CPO; demonstrations H1 2026, production end-2026
Sivers role: High-power DFB laser supplier — partner-and-customer hybrid (see Partners)
Target market: $1B+ annual ELS market opportunity

2.6 Mitsubishi Electric — III-V supplier and integration co-developer

Disclosure status: Active partnership (per POET FAQ June 2024) for integrating Mitsubishi Electric’s 400G EMLs into POET 1.6 Tbps optical engines ✓
Mitsubishi role: EML laser chip supplier; not a downstream customer of POET (see Partners)

3. Cancelled or impaired customer engagements

3.1 Marvell Semiconductor / Celestial AI (cancelled 2026-04-23)

Most consequential customer reversal in POET’s modern history.

Original engagement: First disclosed 2023-04-25 as initial production-unit purchase orders for what was then publicly known as Celestial AI (Photonic Fabric architecture; Celestial AI was a privately held AI-optical-interconnect company)
Acquisition: Marvell Technology announced acquisition of Celestial AI Dec 2025; closed Feb 2 2026
Cancellation: Marvell Semiconductor Inc, on behalf of Celestial AI, sent written notice on 2026-04-23 cancelling all purchase orders POET had received from Celestial AI
Cited reason: “Alleged disclosures of information related to the Purchase Order and shipping information in contravention of confidentiality obligations”
POET disclosure: 2026-04-27 press release ✓
Likely trigger: A pre-cancellation Stocktwits exclusive interview with CFO Thomas Mika where Mika said POET planned to begin shipments tied to Marvell with deliveries as early as next quarter, and referenced “$5M production order for 800G optical engines and outstanding invoices from Celestial AI”
Market impact: POET shares fell 46% on 2026-04-28, the sharpest intraday drop on record ✓ (Forex News)
POET response: Statement did not detail the breach; CFO declined comment per Stocktwits

Strategic implications:

POET’s most prominent design win in the Marvell-DSP-anchored CPO architecture is gone
The cancellation reframes the FY2026 revenue pipeline; replacement orders from non-Marvell customers (Mentech, Lessengers, undisclosed Foxconn / Luxshare engagements) become the primary near-term thesis driver
The reputational damage is real but bounded — POET still has the Optical Interposer IP, the SilTerra-Globetronics-NationGate manufacturing stack, and other engagements
Future customer communications will be substantially more conservative in disclosure

⚠ Whether the Marvell-Celestial AI cancellation reflects a substantive technical or commercial disagreement, or strictly the confidentiality breach as stated, is not publicly known. Marvell’s Celestial AI integration may have led the team to consolidate around captive Photonic Fabric chiplets rather than third-party engines like POET’s — but this is inference, not primary-sourced.

4. Inferred / undisclosed customer engagements

4.1 Foxconn Interconnect Technology (FIT)

Status: Disclosed by POET as a long-term partner / customer; specific design wins not publicly named ◐
CFO commentary 2026-04: Per Stocktwits CFO interview, POET was awaiting feedback from FIT and Luxshare with at least one expected soon
Position in stack: FIT is a major contract manufacturer of optical / connectivity components for hyperscaler-grade transceivers; an FIT design win would imply hyperscaler indirect demand
⚠ Specific FIT module / customer not named publicly

4.2 Luxshare

Status: Same as FIT — disclosed long-term partner, specific design wins not publicly named ◐
CFO commentary 2026-04: Same Stocktwits reference
Position in stack: Major Chinese optical-module manufacturer (Luxshare-ICT subsidiary); ships into AI cluster networks
⚠ Specific Luxshare design / engine variant not named

4.3 The “two unnamed key customers” $5.6M Q3 2025 production orders

Status: Disclosed by POET in Q3 2025 earnings (release) ✓
Detail: Two successive initial production orders from two key customers totaling >$5.6M
⚠ Customer names not disclosed at time of release
⚠ Whether these overlap with Mentech / Lessengers or are separate transactions is not clarified publicly

4.4 The 2025-10-22 $5.0M production order

Status: Separately disclosed (press release) ✓
Customer: Not named; described as “another technology company”
⚠ Possibly part of the $5.6M Q3 figure or possibly separate; press release language is ambiguous

5. End-customer hyperscalers (indirect)

POET does not sell directly to hyperscalers. The hyperscaler end-market is reached through transceiver-module makers (Mentech, Lessengers, FIT-built modules, Luxshare-built modules, Coherent/Lumentum/Innolight/Eoptolink-built modules where POET engines are inside).

The hyperscaler buyer set most relevant to POET’s volume ramp:

NVIDIA Cloud / NVIDIA-driven AI clusters — primary 800G/1.6T transceiver demand pull through 2026–2027 ⚠ POET indirect via module-makers
AWS / Microsoft Azure / Google Cloud / Meta — tier-1 hyperscalers each running multi-Tb/s rack-level interconnect ⚠ POET indirect
Oracle / OCI — fast-growing AI factory buildout ⚠ POET indirect
Chinese hyperscalers (Alibaba, Tencent, Baidu, ByteDance) — addressed via SPX Xiamen + Mentech-class Chinese module-makers ⚠ POET indirect, geopolitically sensitive

⚠ No POET engine has been publicly confirmed as deployed at a specific named hyperscaler as of 2026-04-29. Inferences from module-maker design wins are circumstantial.

6. Customer-by-engagement summary table

Customer	Type	Generation	Status	First disclosed	Last update
Mentech Technology	Module-maker	800G + 1.6T	✓ Active	2024-09-12	2024-09
Lessengers	Module-maker	800G; 1.6T 2×DR4	✓ Active	Q2 2025	2026 sample target
Semtech	Co-developer / TIA supplier	1.6T receiver	✓ Active	2025-10-06	2025-10
Sivers Semiconductors	Co-developer / DFB supplier	CPO ELS	✓ Active	2025-09-29	2026 demo target
Quantum Computing Inc (QCi)	Co-developer / TFLN supplier	3.2T	✓ Active	2025-11-11	2026 H2 target
Mitsubishi Electric	III-V supplier / integration	1.6T EML	✓ Active	2024-06 (FAQ)	Ongoing
Foxconn Interconnect Technology	Module / design partner	Generic	◐ Active	Multi-year	2026-04 (CFO comment)
Luxshare	Module-maker	Generic	◐ Active	Multi-year	2026-04 (CFO comment)
Marvell / Celestial AI	DSP / CPO architecture	800G/1.6T CPO	⚠ CANCELLED 2026-04-23	2023-04-25	2026-04-23
Two unnamed Q3 2025 customers	Module-makers (likely)	800G	◐ Active	2025-Q3	$5.6M total
2025-10-22 unnamed customer	”Technology company”	800G	◐ Active	2025-10-22	$5.0M order

7. Forward audit task list

Pull FY2024 20-F (accession 0001641172-25-002143) for any disclosed customer-concentration percentages or named-customer disclosures ⚠
Track replacement orders post the Marvell cancellation — incremental Mentech, Lessengers, FIT, Luxshare press releases through Q2/Q3 2026 ⚠
Identify the two unnamed Q3 2025 customers when subsequent press releases name them ⚠
Map module-maker customers to hyperscaler end-customers as design wins are publicly disclosed ⚠

8. Cross-references

Partners — supplier-side framing of Semtech, Sivers, QCi, Mitsubishi (which are simultaneously partners and customers)
Competitors — alternative engine suppliers competing for the same customers
Supply chain map — value-chain context
products — what each customer is buying