Thesis. IT datacom is now 43% of sales and growing 63% organically, with record $10.7B of orders at a 1.23 book-to-bill. Amphenol sells into essentially every rack regardless of whose silicon is inside, which makes it the broadest clean read on AI hardware volume.
Reviewed 11 September 2026, after Q2 results and the 2-for-1 split. Next review after Q3 earnings on 21 October 2026.
What it does
Amphenol designs and makes connectors and interconnect systems — the physical plugs, cables and sockets that carry signal and power between components. It sells into IT datacom, industrial, defence, automotive, aerospace, mobile and communications markets. CEO is R. Adam Norwitt.
Every server rack needs hundreds of connections. Amphenol doesn't much care whose chips are in the rack — it sells the parts that join them together either way.
Bull case
- Record quarter. Q2 2026, reported 29 July: sales $8.76B, up 55% on the year and 30% organically. Both sales and adjusted EPS beat the high end of guidance
- IT datacom is the whole story. Now 43% of total sales, up 89% in dollars and 63% organically. No longer a side segment — it is the largest end market
- Orders are running ahead of revenue. Record $10.7B with a book-to-bill of 1.23:1, meaning 23% more work coming in than going out
- Margins are strong. Adjusted operating margin 29.8%, operating income $2.58B against $1.42B a year earlier. H1 free cash flow $2.04B
- CommScope is beating its own case. Now expected to add $4.6B of 2026 sales and $0.30 of EPS, raised from $4.1B and $0.15 on faster integration
- A seat at the standards table. Amphenol joined the working group defining expanded-beam optical connectivity for AI infrastructure, alongside AMD, Arista, Cisco, Meta, Oracle and TE Connectivity. TSMC has named fiber connectors as one of four remaining bottlenecks to co-packaged optics — being in the room where the spec is written is the difference between selling into it and being designed out of it
- Guidance holds the line. Q3 sales $9.3–9.4B, implying 50–52% growth, with adjusted EPS of $0.70–0.71 post-split
Bear case
- One segment is shrinking. Communications networks, 11% of sales, fell 6% organically and Q3 guides to a mid-teens sequential decline. Carrier and wireless demand is moderating
- Half the growth was bought. 24 of the 55 growth points came from acquisitions. The 30% organic figure is excellent, but it isn't the headline number
- The margin had help. $80M of net tariff recoveries flattered it, and the company expects those to be immaterial from here. The comparison gets harder
- Tax is up. Adjusted rate rose to 27% from 24.5%, straight off net income
- Capital spending is elevated, running at or above the normal 3–4% of sales
- The diversified base cuts both ways. Automotive at +6% organic and mobile devices are slow-growth ballast, and industrial cyclicality dilutes the AI signal
Major customers
- Hyperscalers and AI datacentre builders — the IT datacom segment, 43% of sales and up 63% organically. Individual customers are not disclosed
- Server and networking OEMs — Dell, HPE, Supermicro and the switch vendors, buying high-speed connectors and cable assemblies
- Defence primes and government — 8% of sales, up 24% organically
- Automotive OEMs — 10% of sales
- Telecom carriers and wireless equipment makers — 11% of sales, the segment currently declining
- Industrial and commercial air customers — the diversified base underneath it all
What would change the view
- IT datacom organic growth rate — the AI signal itself, currently +63%
- Book-to-bill staying above 1.0, currently 1.23:1
- Communications networks — whether the mid-teens sequential decline deepens or stabilises
- CommScope integration and whether the raised $4.6B / $0.30 accretion actually lands
- Organic versus acquired growth as the deals annualise and the comparison gets honest
- Margin without the tariff recoveries
Update log
- 11 Sep 2026 — Reviewed. No change to the thesis or the verdict.
- 2 Sep 2026 — 2-for-1 stock split took effect. Q3 adjusted EPS guidance restated to $0.70–0.71 and the quarterly dividend to $0.125. Unadjusted charts show a ~50% gap down on this date; it is not a price move.
- 31 Aug 2026 — Joined the multi-source agreement working group on expanded-beam optical connectivity. Added to the bull case. Detail below.
- 14 Aug 2026 — Full review after Q2 2026 results. IT datacom at 43% of sales became the centre of the thesis; flagged the communications-networks decline and the acquisition share of growth as the main risks.
31 Aug 2026 — the split and the optical-connector MSA, in full
⚠️ 2-for-1 stock split, shares distributed September 2, 2026. Announced Aug 6; record date Aug 17. Post-split Q3 adjusted EPS guidance becomes $0.70–0.71 (pre-split $1.40–1.42); the Q3 dividend becomes $0.125 (from $0.25), payable Oct 14 to holders of record Sept 22.
Practical note: unadjusted charts will show a ~50% gap down on Sept 2. Check any technical screener doesn't read it as a signal.
Joined a multi-source agreement (MSA) working group for expanded-beam optical connectivity in AI infrastructure — alongside 3M, AMD, Arista Networks, Cisco, Meta, Oracle and TE Connectivity. The group aims to develop open, interoperable specifications.
This matters more than it looks. TSMC's VP of Advanced Packaging named lasers, optical fibers, fiber connectors and product testing as the four remaining bottlenecks to large-scale co-packaged optics deployment. Amphenol is at the table where the connector standard gets written — which is the difference between selling into a spec and being designed out of one.
Q3 guidance of $9.3–9.4B implies 50–52% growth. Stock ~$157 pre-split, market cap ~$194B, up ~16% YTD.
Research and education only — not investment advice.
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