AMPHENOL CORP
Ticker: APHTechnologyElectronic EquipmentS&P 500The business
Amphenol Corporation (NYSE: AMP) is one of the world's largest designers, manufacturers and marketers of electrical, electronic and fiber optic connectors and interconnect systems, antennas, sensors and sensor-based products, and coaxial, high-speed, fiber optic and specialty cable. The company operates through three reportable business segments: Communications Solutions, which represents 52% of net sales and includes high-speed interconnect products, fiber optic systems, radio frequency interconnects, cable assemblies and antennas; Harsh Environment Solutions, representing 26% of net sales and providing ruggedized interconnect products, specialty cable and printed circuits; and Interconnect and Sensor Systems, representing 22% of net sales and offering sensors, sensor-based systems and value-add interconnect solutions.
The company serves a diversified customer base across multiple end markets including information technology and data communications (36% of sales), industrial (19%), automotive (15%), communications networks (10%), defense (9%), commercial aerospace (5%), and mobile devices (6%). Amphenol's products enable applications ranging from artificial intelligence and cloud computing infrastructure to electric vehicles, 5G networks, aerospace systems and industrial automation.
As of December 31, 2025, Amphenol employed approximately 170,000 people worldwide, with about 90% of its workforce located outside the United States. The company operates manufacturing, engineering, sales and service facilities in approximately 40 countries, with approximately 79% of long-lived assets located outside the United States. Non-U.S. markets represented approximately 65% of net sales in 2025, with China constituting approximately 16% of sales.
The company's business model emphasizes broad market diversification, high-technology performance-enhancing solutions, global presence and cost control. Amphenol maintains a distinctive entrepreneurial management culture with more than 140 general managers operating in a flat organizational structure. The company pursues strategic acquisitions to expand product lines, technological capabilities and geographic presence. The company's website is www.amphenol.com.
- Sector
- Technology
- Industry
- Electronic Equipment
- HQ
- WALLINGFORD, CT
- FY end
- 12-31
- CIK
- 820313
- SIC
- 3678
Ownership
Who holds AMPHENOL CORP — across funds, superinvestors and bonds · N-PORT 2026Q2 · 13F 2026-06-30
Top fund holders
| Fund | % of fund | Value |
|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VTI · VANGUARD INDEX FUNDS | 0.30% | $6.89B |
| VANGUARD 500 INDEX FUND VOO · VANGUARD INDEX FUNDS | 0.34% | $5.62B |
| Fidelity Contrafund FCNTX | 1.93% | $3.47B |
| iShares Core S&P 500 ETF IVV · iShares Trust | 0.34% | $2.98B |
| Growth Fund of America AGTHX | 0.74% | $2.67B |
Superinvestors in AMPHENOL CORP
Share of each manager's reported 13F portfolio.
Bonds held by funds
Funds report holding 20 issues of AMPHENOL CORP's debt, $3.06B at fund-held market value — what funds hold, not the company's debt outstanding. Weighted-average coupon 4.42%, maturing 2027–2055.
| Issue | Coupon | Matures | Funds | Fund-held |
|---|---|---|---|---|
| APH 4.625 02/15/36 | 4.625% | 2036-02-15 | 87 | $625.47M |
| Amphenol Corp | 4.400% | 2033-02-15 | 106 | $438.35M |
| Amphenol Corp. | 5.300% | 2055-11-15 | 107 | $307.92M |
| Amphenol Corp | 3.800% | 2027-11-15 | 66 | $255.06M |
| Amphenol Corp. | 4.125% | 2030-11-15 | 85 | $248.27M |
| Amphenol Corp. | 3.900% | 2028-11-15 | 86 | $200.57M |
| AMPHENOL CORPORATION NEW FRN SOFR+53 11/15/2027 | 4.190%Variable | 2027-11-15 | 31 | $186.42M |
| AMPHENOL CORP | 5.000% | 2035-01-15 | 52 | $152.70M |
| APH 4.375 06/12/28 | 4.380% | 2028-06-12 | 53 | $148.49M |
| APH 5.25 04/05/34 | 5.250% | 2034-04-05 | 49 | $115.84M |
The 10 largest by fund-held value, of 20.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Fund ownership is a subset of institutional 13F ownership — the two describe overlapping populations and must not be added together.
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