(As of December 12, 2025 | Post Q3 2025 earnings and recent insider transactions)
Current market capitalization: ≈ $167 billion (based on ~$138.58/share and 1.225 billion shares outstanding)
Introduction
Amphenol Corporation (NYSE: APH), founded in 1932 and headquartered in Wallingford, Connecticut, is a global leader in designing, manufacturing, and marketing interconnect products, including connectors, cables, and sensors for aerospace, automotive, communications, and industrial markets. Public since 1987, it operates with a single-class share structure (one vote per share), ensuring equitable governance. Ownership is institutionally dominant (~97%), with insiders ~0.54%, and retail ~2.46%. No single entity holds majority control, reflecting broad tech/hardware exposure. The table below details the top 10 from Q3 2025 13F filings and SEC data, with values at current market cap. Recent activity includes minor insider sales (~$1.59M on Nov 20, 2025) and no active buybacks (focus on acquisitions like CommScope's connectivity unit for $10.5B in Aug 2025).
| Rank | Owner / Stakeholder | Ownership % | Approx. Value ($167B valuation) | Detailed Notes |
|---|---|---|---|---|
| 1 | Vanguard Group Inc. | 10.23% | $17.1 billion | Largest holder via index funds (e.g., VTI, VOO); owns ~125.23M shares. Passive with ~$9.3T AUM; added ~0.3% in Q3 2025; core S&P 500 weighting (~6%). No direct control; focuses on interconnect growth. |
| 2 | BlackRock Inc. | 8.24% | $13.8 billion | Holds ~100.85M shares through iShares ETFs (e.g., IVV); passive/active mix. Increased ~0.5% in Q3 2025; board observer on governance/ESG. Key in tech funds; APH ~0.3% of portfolio. |
| 3 | FMR LLC (Fidelity) | 8.15% | $13.6 billion | ~99.82M shares across funds (e.g., Contrafund); active with minor Q3 trim. Bullish on aerospace/defense (up 10% Q3); advisory on innovation. |
| 4 | State Street Corporation | 4.58% | $7.7 billion | Owns ~56.03M shares via SPDRs (e.g., SPY); fully passive. Stable QoQ; votes proxies on exec comp and supply chain ethics. ~4% of tech holdings. |
| 5 | Price T. Rowe Associates Inc. | 3.60% | $6.0 billion | ~44.07M shares in growth funds (e.g., Blue Chip); stable QoQ; focuses on communications (up 15% YoY). |
| 6 | Geode Capital Management, LLC | 2.00% | $3.3 billion | Fidelity affiliate with ~25M shares in index trackers; passive. Grew ~0.3% in Q3; tracks Nasdaq 100; minimal voting power. |
| 7 | Bank of New York Mellon Corp | 1.96% | $3.3 billion | ~24.0M shares; passive custodian. Minor Q3 adjustments; holds for dividend yield (0.8%). |
| 8 | Massachusetts Financial Services Co. MA | 1.51% | $2.5 billion | ~18.5M shares; active manager. Stable QoQ; emphasizes industrial end-markets. |
| 9 | Richard Adam Norwitt (CEO) | 0.54% | $0.9 billion | ~6.61M shares; largest individual insider. Recent sales (~$148M over past year); oversees strategy since 2011; net worth ~$900M tied to performance. |
| 10 | JPMorgan Chase & Co. | 1.00% | $1.7 billion | ~12.25M shares in asset management; index/active blend. Up ~1% in Q3; banking partner for APH's $1.5B cash reserves. |
Total Top 10 = ~60.77% | Remaining: Other Institutions (~36%), Other Insiders (~0%, e.g., Luc Walter at ~0.1%), Retail (~2.46%) | Grand Total = 100%
Conclusion
As of December 2025, Amphenol's ownership is institutionally concentrated (~97% total) by passive titans like Vanguard and BlackRock, providing stability for its $15.6B Q3 2025 revenue (up 25% YoY, ~50% from interconnects) and $0.98B net income (up 30% YoY, adj. EPS $1.06), driven by AI data centers and acquisitions (e.g., $10.5B CommScope unit). Insiders (~0.54% combined) like Norwitt reflect routine sales amid expansions (e.g., fiber-optic demand up 38%), while retail's ~2.46% stake is minimal. With $167B market cap (up 90% YoY) and no dividends paused (focus on M&A), expect minor share reductions from grants, institutional rebalancing in Q4 13Fs (due Feb 2026), and FY2026 revenue ~$65B (up 15%). This structure supports connector dominance. For filings, visit SEC EDGAR or Amphenol's investor relations.