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AME · Ametek Inc/

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$242.29 +2.74 (+1.14%)
Market Cap
$54.92B
Shares
229.26M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,194
Total Value: $49,580,878,432
Total Shares: 205,786,141

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,194 13F filers · Δ vs Mar 31, 2026
Top Holder
9.5%
Sep 2023 → Jun 2026 · range 9.3% – 13.6%
+0.2 pts
Top 5
30.0%
Sep 2023 → Jun 2026 · range 30.0% – 36.2%
−0.1 pts
Top 10
41.2%
Sep 2023 → Jun 2026 · range 41.2% – 48.4%
−0.1 pts
HHI
259
Sep 2023 → Jun 2026 · range 257 – 387
Broadly held+1

Quarterly Activity

vs Mar 31, 2026
New
127
Increased
485
Decreased
402
Sold Out
93
Unchanged
180
Holder count: +34
Institutional value: +14.8%
Shares held: +2.1%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 1,212
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1037868 CUSIP 031100100 13F (30d) 949 filings 913 filers Visit website Investor relations