AMPHENOL CORP /DE/

AMPHENOL CORP /DE/ (None, CIK 0000820313) — US-listed company materially exposed to Active Electrical Cable (AEC).

Amphenol’s 2024 10-K reports three segments. The table below is drawn directly from the segment note in the 10-K.

Source: Amphenol Corporation Form 10-K for fiscal year ended December 31, 2024, filed February 12, 2025, SEC EDGAR Accession No. 0000820313-25-000011, document aph-20241231.htm, Item 8/segment note. Accessed April 27, 2026.

The 2024 operating income by segment, as reported in the same segment note, shows why mix matters:

Source: Amphenol Corporation 10-K, fiscal year ended December 31, 2024, filed February 12, 2025, Accession No. 0000820313-25-000011, document aph-20241231.htm, Item 8/segment note. Accessed April 27, 2026.

The spread between HES margins and the other two segments is meaningful. If HES grows faster than the corporate average, consolidated operating margin should benefit; if HES slows or the company overpays for harsh-environment acquisitions, the mix benefit reverses.

Amphenol’s 10-K describes a manufacturing business that sells electrical, electronic, and fiber optic connectors, interconnect systems, antennas, sensors, sensor-based products, and coaxial and high-speed specialty cable. Revenue is generated overwhelmingly from product sales to OEMs, electronic manufacturing services providers, and distributors. The filing does not segment revenue into meaningful recurring software or service streams; this is a component-hardware model.

The company explicitly reports that no single customer accounted for 10% or more of net sales in 2024. Therefore, top customers are not named in the 10-K. Any list of named end-OEMs would be speculation and is not included here.

The consolidated income statement supports the margin claims:

Source: Amphenol Corporation 10-K, fiscal year ended December 31, 2024, filed February 12, 2025, Accession No. 0000820313-25-000011, document aph-20241231.htm, Item 8 consolidated statements of income. Accessed April 27, 2026.

Net income attributable to Amphenol was $2,264.2 million in 2024, and diluted EPS was $1.86. The gross-margin improvement from 32.5% to 33.1% is modest but directionally consistent with a favorable mix shift toward HES and the addition of Carlisle Interconnect Technologies, which closes into the HES segment. Operating margin was essentially flat year over year, evidence that SG&A grew alongside acquisitions.

This is the most important “profitability bridge” available from the 10-K because Amphenol does not disclose unit volumes.

The 10-K identifies the customer base in general terms: OEMs, electronic manufacturing services providers, and distributors. The end-market disclosure is broader:

• automotive;
• broadband communications;
• commercial aerospace;
• defense;
• industrial;
• information technology and data communications;
• mobile devices;
• mobile networks.

No individual customer is named in the 10-K because no customer exceeds 10% of net sales. Any named buyer such as “Apple,” “Boeing,” “Lockheed Martin,” or “Ford” would be inference and is not used here.

The absence of a 10% customer is itself an underwriting fact: Amphenol’s revenue is diversified. A revenue model dependent on one large OEM would present different risk. The 10-K confirms no customer accounted for 10% or more of net sales in 2024.

• HES: Buyers are primarily in defense, commercial aerospace, industrial, and harsh-environment applications. These customers tend to demand qualification-heavy, high-reliability connectors.
• CS: Buyers are in IT/datacom, mobile networks, and broadband. Demand is tied to data-center buildouts, telecom capital expenditure, and broadband deployment.
• ISS: Buyers include automotive OEMs/Tier 1 suppliers and mobile-device manufacturers. This segment is more exposed to consumer and vehicle production cycles.

The buyer archetypes above are drawn from the segment descriptions in the 10-K, not from any named customer disclosure.

Amphenol manufactures high-speed cable assemblies and connectors that can integrate active cable silicon.

• Amphenol manufactures high-speed cable assemblies and connectors that can integrate active cable silicon. source
• AMPHENOL CORP /DE/ — SEC EDGAR company filings source

= (3,213.6 − 2,675.1) / (15,222.6 − 12,554.7)

= 538.5 / 2,667.9

= 20.2% incremental operating margin