Comparable stake leader
VANGUARD GROUP INC
SEC ownership of AMPHENOL CORP /DE/
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000820313.
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- APH on NYSE
- Parsed ownership sources
-
13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD GROUP INC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD GROUP INC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000820313
- Issuer location
- Wallingford, CT
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of AMPHENOL CORP /DE/ (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD GROUP INC
Disclosed value leader
VANGUARD GROUP INC
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
Lead comparable stake: 10%
13D/G row: VANGUARD GROUP INC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 10%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD GROUP INC's linked filing trail.
Comparable ownership
Top 5
VANGUARD GROUP INC
10%
FMR LLC
7.1%
BlackRock, Inc.
8.4%
VANGUARD CAPITAL MANAGEMENT LLC
6.6%
STATE STREET CORP
4.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
10%
|
$15,496,852,016
125,227,087 shares
|
$0 | 30 Sep 2025 |
| FMR LLC |
13D/G
13F
Company
|
7.1%
|
$11,670,878,257
86,361,390 shares
|
-$1,810,569,638 | 31 Dec 2025 |
| BlackRock, Inc. |
13F
Company
|
8.4%
|
$12,883,412,435
101,966,066 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
6.6%
|
$10,092,263,866
79,875,456 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
4.7%
|
$7,266,090,298
57,396,418 shares
|
— | 31 Mar 2026 |
| JPMORGAN CHASE & CO |
13F
Company
|
4.1%
|
$5,870,589,642
49,270,578 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
Company
|
2.9%
|
$4,529,669,105
35,850,171 shares
|
— | 31 Mar 2026 |
| Capital International Investors |
13F
Company
|
2.9%
|
$4,463,635,126
35,333,842 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$407,771,664.
Buys
$1,285,080
Insiders: 1
Sells
$409,056,744
Insiders: 8
Net
-$407,771,664
Shares: -3,018,226
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 10,000
Shares: 3,028,226
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 130,775 | $0 | $18,709,066 | -$18,709,066 |
| 3-6 | 10,000 | 758,333 | $1,285,080 | $112,069,848 | -$110,784,768 |
| 6-9 | 0 | 1,435,194 | $0 | $200,731,173 | -$200,731,173 |
| 9-12 | 0 | 703,924 | $0 | $77,546,657 | -$77,546,657 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 23 reporting-owner rows connected to AMPHENOL CORP /DE/. Open a relationship link for the CIK-to-CIK filing trail.
Rows
23
Largest Forms 3/4/5 holder
Martin H. Loeffler
Net 12M change
-$407,771,664
Latest report
22 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Martin H. Loeffler | Director | $185,760,563 | Mixed | 10 Dec 2025 | ||
| Richard Adam Norwitt | President & CEO, Director | $109,690,119 | -$108,286,629 | -50% | Mixed | 22 May 2026 |
| Edward G. Jepsen | Director | $54,410,097 | Mixed | 17 May 2024 | ||
| Craig A. Lampo | Executive VP & CFO | $53,951,184 | -$84,195,540 | -61% | Mixed | 22 May 2026 |
| Luc Walter | President, HES Division | $44,695,301 | -$49,163,431 | -52% | Mixed | 22 May 2026 |
| Michael R. Ivas | SVP & Corporate Controller | $23,329,642 | -$39,263,408 | -63% | Mixed | 22 May 2026 |
| Robert Livingston | Director | $17,446,408 | +$1,285,080 | +8% | Mixed | 22 May 2026 |
| Lance E. D'Amico | EVP, Secretary & GenCounsel | $12,811,889 | -$24,295,703 | -65% | Mixed | 22 May 2026 |
| David P. Falck | Director | $11,977,221 | Mixed | 22 May 2026 | ||
| David M. Silverman | EVP, Human Resources | $9,397,534 | -$27,982,502 | -75% | Mixed | 22 May 2026 |
| Martin Booker | VP & Grp General Mgr, AIPG | $6,422,109 | Mixed | 27 Aug 2021 | ||
| Richard Gu | VP,Grp GM Mobile Consumer Prod | $5,772,034 | Mixed | 20 May 2021 | ||
| Dieter Ehrmanntraut | VP & Grp GM, Automotive Prod | $5,593,020 | Mixed | 20 May 2021 | ||
| Anne Clarke Wolff | Director | $5,199,807 | Mixed | 22 May 2026 | ||
| Jean-Luc Gavelle | President, ISS Division | $4,580,232 | Mixed | 31 Aug 2023 | ||
| Stanley L. Clark | Director | $3,230,903 | Mixed | 31 Dec 2022 | ||
| Rita S. Lane | Director | $3,139,292 | Mixed | 22 May 2026 | ||
| Nancy A. Altobello | Director | $2,380,686 | Mixed | 22 May 2026 | ||
| Prahlad R. Singh | Director | $1,437,357 | Mixed | 22 May 2026 | ||
| John D. Craig | Director | $1,198,143 | Mixed | 20 May 2021 |
Recent insider transactions for AMPHENOL CORP /DE/
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Luc Walter | APH | Stock Option | Award | 108,809 | 108,809 | 22 May 2026 | Direct | |||
| Peter Straub | APH | Stock Option | Award | 108,809 | 108,809 | 22 May 2026 | Direct | |||
| David M. Silverman | APH | Stock Option | Award | 70,690 | 70,690 | 22 May 2026 | Direct | |||
| Richard Adam Norwitt | APH | Stock Option | Award | 464,989 | 464,989 | 22 May 2026 | Direct | |||
| Craig A. Lampo | APH | Stock Option | Award | 133,161 | 133,161 | 22 May 2026 | Direct | |||
| Michael R. Ivas | APH | Stock Option | Award | 51,134 | 51,134 | 22 May 2026 | Direct | |||
| William J. Doherty | APH | Stock Option | Award | 108,809 | 108,809 | 22 May 2026 | Direct | |||
| Lance E. D'Amico | APH | Stock Option | Award | 83,020 | 83,020 | 22 May 2026 | Direct | |||
| Anne Clarke Wolff | APH | Restricted Stock | Award | 1,552 | 1,552 | 22 May 2026 | Direct | |||
| Prahlad R. Singh | APH | Restricted Stock | Award | 1,552 | 1,552 | 22 May 2026 | Direct | |||
| Robert Livingston | APH | Restricted Stock | Award | 1,552 | 1,552 | 22 May 2026 | Direct | |||
| Rita S. Lane | APH | Restricted Stock | Award | 1,552 | 1,552 | 22 May 2026 | Direct | |||
| Sanjiv Lamba | APH | Restricted Stock | Award | 1,552 | 1,552 | 22 May 2026 | Direct | |||
| David P. Falck | APH | Restricted Stock | Award | 1,552 | 1,552 | 22 May 2026 | Direct | |||
| Nancy A. Altobello | APH | Restricted Stock | Award | 1,552 | 1,552 | 22 May 2026 | Direct | |||
| Craig A. Lampo | APH | Class A Common Stock | Other | -36.8% | -41,203 | 70,907 | 20 May 2026 | Direct | ||
| Lance E. D'Amico | APH | Stock Option | Gift | 64,594 | 43,086 | 20 May 2026 | By Lance E. D'Amico 2024 Irrevocable Trust | |||
| Lance E. D'Amico | APH | Stock Option | Gift | -50% | -64,594 | 64,630 | 20 May 2026 | Direct | ||
| Craig A. Lampo | APH | Stock Option | Gift | 301.3% | 103,607 | 137,997 | 19 May 2026 | Direct | ||
| Richard Adam Norwitt | APH | Class A Common Stock | Sale | -0.9% | $2,506,107 | $143.21 | -17,500 | 1,927,507 | 05 May 2026 | Direct |
| Richard Adam Norwitt | APH | Class A Common Stock | Options Exercise | 0.91% | 17,500 | 1,945,007 | 05 May 2026 | Direct | ||
| Richard Adam Norwitt | APH | Stock Option | Options Exercise | -1.91% | -17,500 | 899,788 | 05 May 2026 | Direct | ||
| Richard Adam Norwitt | APH | Class A Common Stock | Sale | -2.64% | $7,414,998 | $142.04 | -52,203 | 1,927,507 | 04 May 2026 | Direct |
| Richard Adam Norwitt | APH | Class A Common Stock | Options Exercise | 2.71% | 52,203 | 1,979,710 | 04 May 2026 | Direct | ||
| Richard Adam Norwitt | APH | Stock Option | Options Exercise | -5.38% | -52,203 | 917,288 | 04 May 2026 | Direct | ||
| Richard Adam Norwitt | APH | Class A Common Stock | Sale | -3.07% | $8,787,962 | $143.90 | -61,072 | 1,927,507 | 01 May 2026 | Direct |
| Richard Adam Norwitt | APH | Class A Common Stock | Options Exercise | 3.17% | 61,072 | 1,988,579 | 01 May 2026 | Direct | ||
| Richard Adam Norwitt | APH | Stock Option | Options Exercise | -5.93% | -61,072 | 969,491 | 01 May 2026 | Direct | ||
| Craig A. Lampo | APH | Class A Common Stock | Sale | -47.2% | $14,998,130 | $149.98 | -100,000 | 112,110 | 18 Feb 2026 | Direct |
| Craig A. Lampo | APH | Class A Common Stock | Options Exercise | 89.2% | 100,000 | 212,110 | 18 Feb 2026 | Direct | ||
| Craig A. Lampo | APH | Stock Option | Options Exercise | -100% | -100,000 | 0 | 18 Feb 2026 | Direct | ||
| Lance E. D'Amico | APH | Class A Common Stock | Sale | -46.7% | $7,494,155 | $149.88 | -50,000 | 57,065 | 18 Feb 2026 | Direct |
| Lance E. D'Amico | APH | Class A Common Stock | Options Exercise | 87.6% | 50,000 | 107,065 | 18 Feb 2026 | Direct | ||
| Lance E. D'Amico | APH | Stock Option | Options Exercise | -50% | -50,000 | 50,000 | 18 Feb 2026 | Direct | ||
| Richard Adam Norwitt | APH | Class A Common Stock | Sale | -9.72% | $13,694,398 | $147.17 | -93,052 | 864,177 | 12 Feb 2026 | By Norwitt Family Trust |
| Richard Adam Norwitt | APH | Class A Common Stock | Options Exercise | 10.8% | 93,052 | 957,229 | 12 Feb 2026 | By Norwitt Family Trust | ||
| Richard Adam Norwitt | APH | Class A Common Stock | Sale | -21.1% | $75,883,166 | $147.27 | -515,281 | 1,927,507 | 12 Feb 2026 | Direct |
| Richard Adam Norwitt | APH | Class A Common Stock | Options Exercise | 26.7% | 515,281 | 2,442,788 | 12 Feb 2026 | Direct | ||
| Richard Adam Norwitt | APH | Stock Option | Options Exercise | -33.3% | -93,052 | 186,104 | 12 Feb 2026 | By Norwitt Family Trust | ||
| Richard Adam Norwitt | APH | Stock Option | Options Exercise | -33.3% | -515,281 | 1,030,563 | 12 Feb 2026 | Direct | ||
| Robert Livingston | APH | Class A Common Stock | Purchase | 7.95% | $1,285,080 | $128.51 | 10,000 | 135,720 | 05 Feb 2026 | Direct |
| Michael R. Ivas | APH | Class A Common Stock | Gift | 25,000 | 25,000 | 04 Feb 2026 | By Michael Ivas 2026 GRAT #1 | |||
| Michael R. Ivas | APH | Class A Common Stock | Gift | -13.9% | -25,000 | 154,948 | 04 Feb 2026 | Direct | ||
| Michael R. Ivas | APH | Class A Common Stock | Options Exercise | 16.1% | 25,000 | 179,948 | 04 Feb 2026 | Direct | ||
| Michael R. Ivas | APH | Stock Option | Options Exercise | -11% | -25,000 | 203,000 | 04 Feb 2026 | Direct | ||
| Michael R. Ivas | APH | Class A Common Stock | Gift | 1.66% | 2,536 | 154,948 | 29 Jan 2026 | Direct | ||
| Sanjiv Lamba | APH | Restricted Stock | Award | 548 | 548 | 08 Jan 2026 | Direct | |||
| Martin H. Loeffler | APH | Class A Common Stock | Gift | -0.24% | -3,228 | 1,333,146 | 10 Dec 2025 | By Revocable Trust | ||
| Richard Adam Norwitt | APH | Class A Common Stock | Gift | -3.75% | -75,000 | 1,927,507 | 09 Dec 2025 | Direct | ||
| Craig A. Lampo | APH | Class A Common Stock | Gift | 70,000 | 70,000 | 03 Dec 2025 | By Craig A. Lampo 2025 GRAT #2 |
* marks a reported price that did not pass the local price check.