The largest holder of Ametek stock is BlackRock Advisors LLC, with 15.2 million shares (6.63% of the company), worth about $3.58 billion as of September 25, 2026. The 10 largest holders together own 35.0%.
In Q2 2026, 1,231 institutional holdings reports listed shares worth $50.10 billion.
Insiders reported 80 transactions in the last two years: 15 sales worth $68.40 million and no purchases. The newest one on file is from May 7, 2026 (Stanage Nickie Lee, Director).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 7, 2026.

2026Q2
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 15.2 million | 6.63% | $3.6B |
| Vanguard Capital Management LLC | 15.0 million | 6.53% | $3.5B |
| State Street Corporation | 10.3 million | 4.51% | $2.4B |
| Vanguard Portfolio Management LLC | 10.0 million | 4.34% | $2.3B |
| T. Rowe Price International Ltd. | 6.7 million | 2.94% | $1.6B |
| Geode Capital Management LLC | 6.1 million | 2.68% | $1.4B |
| JPMorgan Investment Management, Inc. | 4.4 million | 1.91% | $1.0B |
| Norges Bank (13F) | 4.3 million | 1.88% | $1.0B |
| Fidelity Management & Research Co. LLC | 4.3 million | 1.85% | $1.0B |
| BlackRock Life Ltd. | 3.9 million | 1.72% | $925.0M |
As of September 25, 2026.
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 1,231 | – | $50.1B |
| Q1 2026 | 1,187 | 201.0 million | $43.0B |
| Q4 2025 | 1,157 | 207.0 million | $42.4B |
| Q3 2025 | 1,061 | 204.0 million | $38.2B |
| Q2 2025 | 1,037 | 206.0 million | $37.2B |
| Q1 2025 | 1,034 | 202.0 million | $34.7B |
| Q4 2024 | 1,026 | 200.0 million | $36.0B |
| Q3 2024 | 947 | 207.0 million | $35.6B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Stanage Nickie Lee | May 7, 2026 | Director | Stock Award(Grant) at price 234.73 per share. | $178,395 |
| Amato Thomas A | Mar 24, 2026 | Director | Sale at price 216.78 per share. | $114,893 |
| Speranza Emanuela | Mar 20, 2026 | Officer | -- | – |
| Oscher Ronald J | Mar 18, 2026 | Officer | Stock Award(Grant) at price 212.77 per share. | $276,601 |
| Marecic Thomas C | Mar 18, 2026 | Officer | Stock Award(Grant) at price 212.77 per share. | $263,835 |
| Mcclain Gretchen W | Mar 18, 2026 | Director | Stock Award(Grant) at price 212.77 per share. | $202,132 |
| Seavers Dean | Mar 18, 2026 | Director | Stock Award(Grant) at price 212.77 per share. | $202,132 |
| Hardin John Wesley | Mar 18, 2026 | Officer | Stock Award(Grant) at price 212.77 per share. | $289,367 |
| Carpenter Tod E | Mar 18, 2026 | Director | Stock Award(Grant) at price 212.77 per share. | $202,132 |
| Conti Anthony James | Mar 18, 2026 | Director | Stock Award(Grant) at price 212.77 per share. | $202,132 |
| Puri Dalip | Mar 18, 2026 | Chief Financial Officer | Stock Award(Grant) at price 212.77 per share. | $804,271 |
| Hermance David F. | Mar 18, 2026 | Officer | Stock Award(Grant) at price 212.77 per share. | $263,835 |
Newest 12 of 80 insider transactions in the last two years.
BlackRock Advisors LLC, with 6.63% of the company (as of September 25, 2026). Next: Vanguard Capital Management LLC (6.53%) and State Street Corporation (4.51%).
1,231 institutional holdings reports listed Ametek shares in Q2 2026 worth $50.10 billion.
In the last two years insiders reported 15 sales and no purchases (80 transactions in all); the newest on file is from May 7, 2026.