Amphenol · ownership
Who owns Amphenol?
BlackRock, Inc. is the largest 13F holder: 8.7% of 13F-reported shares calc.
2,323 institutions report 1.17B Amphenol shares in Form 13F, as of quarter end Jun 30, 2026; +11.8M shares vs Mar 31, 2026.
- BlackRock, Inc.8.7%101.3M shares · −714K vs prior quarter (down) · 13F filed Aug 7, 2026
- VANGUARD CAPITAL MANAGEMENT LLC6.9%80.3M shares · +472K vs prior quarter (up) · 13F filed Aug 13, 2026
- FMR LLC6.0%70.6M shares · −8.9M vs prior quarter (down) · 13F filed Aug 13, 2026
- STATE STREET CORP5.1%59.5M shares · +2.1M vs prior quarter (up) · 13F filed Aug 7, 2026
- Capital International Investors3.7%43.0M shares · +7.7M vs prior quarter (up) · 13F filed Aug 12, 2026
- JPMORGAN CHASE & CO3.4%39.2M shares · −10.1M vs prior quarter (down) · 13F filed Aug 12, 2026
- VANGUARD PORTFOLIO MANAGEMENT LLC3.1%35.7M shares · −161K vs prior quarter (down) · 13F filed Aug 13, 2026
- PRICE T ROWE ASSOCIATES INC /MD/2.7%32.0M shares · +5.8M vs prior quarter (up) · 13F filed Aug 14, 2026
- GEODE CAPITAL MANAGEMENT, LLC2.7%31.1M shares · −227K vs prior quarter (down) · 13F filed Aug 12, 2026
- Capital Research Global Investors2.5%29.5M shares · +2.9M vs prior quarter (up) · 13F filed Aug 12, 2026
- MORGAN STANLEY1.8%20.6M shares · +3.1M vs prior quarter (up) · 13F filed Aug 13, 2026
- NORGES BANK1.6%19.2M shares · +19.2M vs prior quarter (new position) · 13F filed Aug 12, 2026
- WELLINGTON MANAGEMENT GROUP LLP1.4%16.6M shares · +1.6M vs prior quarter (up) · 13F filed Aug 14, 2026
- BANK OF AMERICA CORP /DE/1.4%16.2M shares · −4.5M vs prior quarter (down) · 13F filed Aug 14, 2026
- Nuveen, LLC1.3%15.1M shares · +1.9M vs prior quarter (up) · 13F filed Aug 11, 2026
- Bank of New York Mellon Corp1.2%14.6M shares · −1.7M vs prior quarter (down) · 13F filed Aug 6, 2026
- NORTHERN TRUST CORP1.2%13.5M shares · −14K vs prior quarter (down) · 13F filed Aug 13, 2026
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP1.0%11.9M shares · +2K vs prior quarter (up) · 13F filed Aug 13, 2026
- GOLDMAN SACHS GROUP INC0.9%10.8M shares · −640K vs prior quarter (down) · 13F filed Aug 14, 2026
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/0.9%10.5M shares · −3.4M vs prior quarter (down) · 13F filed Aug 3, 2026
Share of 13F-reported shares, not of shares outstanding. 13F covers managers with over $100M in US equities; it is not a full shareholder list.
Method and sources
Source: SEC Form 13F data sets (bulk). Each row links to the holder’s own 13F-HR filing. Holder names exactly as filed; one group can file under several names and CIKs (for example two Vanguard entities), and they are listed separately, as filed.
% = the holder’s shares ÷ all shares reported in 13F filings for this company and quarter (calculated by Hollsteen). This is not a share of shares outstanding. Change = shares vs the same filer’s 13F for the prior quarter (Mar 31, 2026).
Erroneous filings and rows are handled by a fixed rule set (restatements replace originals; non-equity rows and implausible rows excluded): 17 erroneous filings excluded or replaced this quarter. No market values are shown.
SEC filings only. No price or market data.
Who holds more than 5%?
2 current Schedule 13D/13G holders
Schedule 13D/13G filings (5) ›
- VANGUARD CAPITAL MANAGEMENT LLC 7.47%
13G filed Apr 29, 2026 · event date Mar 31, 2026
- FMR LLC 5.7%
13G/A filed Aug 6, 2026 · event date Jun 30, 2026 · 10 earlier filings
- VANGUARD GROUP INC 0%
below 5% latest filing reports under 5% · 13G/A filed Mar 26, 2026 · event date Mar 13, 2026 · 8 earlier filings
- BlackRock Inc. 8.2%
stale filed Jan 25, 2024: older than 18 months, not a current holding · 13G/A filed Jan 25, 2024 · 6 earlier filings
- Capital World Investors 4.5%
stale filed Feb 14, 2019, as of Dec 31, 2018: older than 18 months, not a current holding · 13G/A filed Feb 14, 2019 · 1 earlier filing
Method and sources
Schedule 13D (active) and 13G (passive) are filed by holders of more than 5% of a class. The percentage is the holder’s own cover-page “percent of class”. A filing older than 18 months (filed before 2025-04-17) is marked stale and is never shown as a current holding. Data as of Oct 13, 2026.
SEC filings only.
Are insiders buying or selling?
1 open-market purchases, 25 sales in 12 months
Form 4, Oct 13, 2025 – Oct 13, 2026 · 10,000 shares bought, 3,423,606 shares sold (net −3.4M) · as of Oct 13, 2026
Latest 25 of 161 Form 4 transactions ›
| Date | Insider (as filed) | Transaction | Shares | Held after |
|---|---|---|---|---|
| Aug 6, 2026 | Lampo Craig A · EVP& CFO | Gift | 54,547 disposed | 0 |
| Aug 5, 2026 | Silverman David M · EVP, Human Resources | Option exercise / RSU conversion | 120,000 acquired | 135,672 |
| Aug 5, 2026 | Silverman David M · EVP, Human Resources | Open-market sale | 120,000 disposed | 15,672 |
| Aug 4, 2026 | Lampo Craig A · EVP& CFO | Option exercise / RSU conversion | 193,200 acquired | 283,865 |
| Aug 4, 2026 | Lampo Craig A · EVP& CFO | Open-market sale | 193,200 disposed | 90,665 |
| Aug 3, 2026 | D'AMICO LANCE E · EVP, Secretary & GenCounsel | Option exercise / RSU conversion | 50,000 acquired | 107,065 |
| Aug 3, 2026 | D'AMICO LANCE E · EVP, Secretary & GenCounsel | Open-market sale | 50,000 disposed | 57,065 |
| Aug 3, 2026 | D'AMICO LANCE E · EVP, Secretary & GenCounsel | Option exercise / RSU conversion | 40,000 acquired | 40,000 |
| Aug 3, 2026 | D'AMICO LANCE E · EVP, Secretary & GenCounsel | Open-market sale | 40,000 disposed | 0 |
| Aug 3, 2026 | D'AMICO LANCE E · EVP, Secretary & GenCounsel | Option exercise / RSU conversion | 10,000 acquired | 10,000 |
| Aug 3, 2026 | D'AMICO LANCE E · EVP, Secretary & GenCounsel | Open-market sale | 10,000 disposed | 0 |
| Jul 31, 2026 | NORWITT RICHARD ADAM · Director; President & CEO | Option exercise / RSU conversion | 500,000 acquired | 2,427,507 |
| Jul 31, 2026 | NORWITT RICHARD ADAM · Director; President & CEO | Open-market sale | 500,000 disposed | 1,927,507 |
| Jul 31, 2026 | NORWITT RICHARD ADAM · Director; President & CEO | Option exercise / RSU conversion | 186,104 acquired | 1,050,281 |
| Jul 31, 2026 | NORWITT RICHARD ADAM · Director; President & CEO | Open-market sale | 186,104 disposed | 864,177 |
| May 22, 2026 | Wolff Anne Clarke · Director | Grant or award | 1,552 acquired | 1,552 |
| May 22, 2026 | Singh Prahlad R. · Director | Grant or award | 1,552 acquired | 1,552 |
| May 22, 2026 | Livingston Robert · Director | Grant or award | 1,552 acquired | 1,552 |
| May 22, 2026 | Lane Rita S. · Director | Grant or award | 1,552 acquired | 1,552 |
| May 22, 2026 | Lamba Sanjiv · Director | Grant or award | 1,552 acquired | 1,552 |
| May 22, 2026 | Falck David P · Director | Grant or award | 1,552 acquired | 1,552 |
| May 22, 2026 | Altobello Nancy A. · Director | Grant or award | 1,552 acquired | 1,552 |
| May 20, 2026 | Lampo Craig A · Executive VP & CFO | Other | 41,203 disposed | 70,907 |
| May 5, 2026 | NORWITT RICHARD ADAM · Director; President & CEO | Option exercise / RSU conversion | 17,500 acquired | 1,945,007 |
| May 5, 2026 | NORWITT RICHARD ADAM · Director; President & CEO | Open-market sale | 17,500 disposed | 1,927,507 |
Method and sources
Form 4 filings (not 4/A), table I. Open market = transaction codes P (purchase) and S (sale); grants, option exercises, tax withholding and gifts are listed but not counted as buys or sells. Shares and share counts only, as filed; Hollsteen shows no per-share prices. Data is an export, as of Oct 13, 2026, not live.
SEC filings only.