Amphenol Corporation
Amphenol Corporation (APH) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · APH · as of Sep 30, 2025
Ownership Breakdown
1,880
Institutional Holders
▲ 175 vs Q2
$140.97B
Total Inst. Value
▲ $26.30B vs Q2
1.23B
Shares Outstanding
freeFloat 99.36%
1.14B
13F Shares Held
▼ 24.26M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
APH largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC electronic connectors | 125.23M | 10.33% | 10.33% | $15.50T | Nov 7, 2025 | ▼ 15.30M |
BLACKROCK, INC. electronic connectors | 100.85M | 8.32% | 8.32% | $12.48T | Nov 12, 2025 | ▲ 6.29M |
FMR LLC electronic connectors | 99.82M | 8.23% | 8.23% | $12.35T | Nov 13, 2025 | ▼ 8.85M |
STATE STREET CORP electronic connectors | 56.03M | 4.62% | 4.62% | $6.94T | Nov 14, 2025 | ▲ 676.8K |
PRICE T ROWE ASSOCIATES INC /MD/ electronic connectors | 44.07M | 3.63% | 3.63% | $5.45T | Nov 14, 2025 | ▲ 2.40M |
GEODE CAPITAL MANAGEMENT, LLC electronic connectors | 29.57M | 2.44% | 2.44% | $3.65T | Nov 12, 2025 | ▲ 1.06M |
BANK OF NEW YORK MELLON CORP electronic connectors | 24.00M | 1.98% | 1.98% | $2.97T | Nov 3, 2025 | ▼ 4.28M |
BANK OF AMERICA CORP /DE/ electronic connectors | 22.65M | 1.87% | 1.87% | $2.80T | Feb 3, 2026 | ▼ 237.9K |
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ electronic connectors | 18.54M | 1.53% | 1.53% | $2.29T | Oct 29, 2025 | ▼ 1.60M |
MORGAN STANLEY electronic connectors | 18.12M | 1.49% | 1.49% | $2.24T | May 27, 2026 | ▼ 1.46M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
23
Increased
+57.83M shares0
New Positions
first time holders26
Decreased
−54.11M shares0
Sold Out
fully exitedNet shares change (top 50)
+3.72M
+57.83M / −54.11M
Net new holders
-3
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
APH insider trading · insider activity
Source: SEC Form 4
7
Buy transactions
9
Sell transactions
0.78
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
WALTER LUC President, HES Division | May 22, 2026 | Award | 108,809 | $132.06 | $14.37M | 108.8K | Form 4 ↗ |
Straub Peter President, ISS Division | May 22, 2026 | Award | 108,809 | $132.06 | $14.37M | 108.8K | Form 4 ↗ |
Silverman David M EVP, Human Resources | May 22, 2026 | Award | 70,690 | $132.06 | $9.34M | 70.7K | Form 4 ↗ |
NORWITT RICHARD ADAM President & CEO | May 22, 2026 | Award | 464,989 | $132.06 | $61.41M | 465.0K | Form 4 ↗ |
Lampo Craig A Executive VP & CFO | May 22, 2026 | Award | 133,161 | $132.06 | $17.59M | 133.2K | Form 4 ↗ |
Ivas Michael R. SVP & Corporate Controller | May 22, 2026 | Award | 51,134 | $132.06 | $6.75M | 51.1K | Form 4 ↗ |
Doherty William J President, CS Division | May 22, 2026 | Award | 108,809 | $132.06 | $14.37M | 108.8K | Form 4 ↗ |
D'AMICO LANCE E EVP, Secretary & GenCounsel | May 22, 2026 | Award | 83,020 | $132.06 | $10.96M | 83.0K | Form 4 ↗ |
Wolff Anne Clarke director | May 22, 2026 | Award | 1,552 | — | — | 1.6K | Form 4 ↗ |
Singh Prahlad R. director | May 22, 2026 | Award | 1,552 | — | — | 1.6K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Amphenol Corporation (APH) is primarily owned by institutional investors, who hold approximately 92.6% of total shares outstanding. Company insiders own approximately 0.64%, while retail and public investors account for the remaining 6.76%.
The largest institutional shareholder of Amphenol Corporation is VANGUARD GROUP INC, holding approximately 125.23 million shares — equal to 10.33% of outstanding shares — as of September 30, 2025.
A total of 1,880 institutional investors currently hold APH stock, with a combined institutional value of approximately $140.97 billion as of the most recent 13F filing period.
Frequently asked questions
APH ownershipAmphenol Corporation (APH) is primarily owned by institutional investors, who hold approximately 92.6% of shares. The largest shareholder is VANGUARD GROUP INC with a 10.33% stake. Company insiders hold 0.64%. Data sourced from SEC Form 13F as of September 30, 2025.