AMETEK, Inc.
US ˙ NYSE ˙ US0311001004

SecurityAME / AMETEK, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership321,113 shares
Latest Disclosed Value $ 68,816,867
Janus Henderson Group Plc reports 19.55% decrease in ownership of AME / AMETEK, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 321,113 shares of AMETEK, Inc. (US:AME) valued at $68,833,783 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 399,153 shares of AMETEK, Inc.. This represents a change in shares of -19.55% during the quarter. The current value of the position is $73,457,810 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-18 2026-03-31 13F/A-1 AMETEK COM 031100100 321,113 -78,040 -19.55 68,817 -16.04 0.0116
2026-05-15 2026-03-31 13F AMETEK COM 031100100 321,113 -78,040 68,817 0.0128
2026-02-17 2025-12-31 13F AMETEK COM 031100100 399,153 12,451 3.22 81,962 12.76 0.0367
2025-11-14 2025-09-30 13F AMETEK COM 031100100 386,702 76,780 24.77 72,685 29.61 0.0332
2025-08-14 2025-06-30 13F AMETEK COM 031100100 309,922 38,637 14.24 56,079 21.34 0.0275
2025-05-15 2025-03-31 13F AMETEK COM 031100100 271,285 37,226 15.90 46,218 9.54 0.0253
2025-02-14 2024-12-31 13F AMETEK COM 031100100 234,059 -30,854 -11.65 42,194 -7.24 0.0214
2024-11-14 2024-09-30 13F AMETEK COM 031100100 264,913 4,352 1.67 45,486 4.72 0.0233
2024-08-14 2024-06-30 13F AMETEK COM 031100100 260,561 -22,487 -7.94 43,438 -16.09 0.0233
2024-05-15 2024-03-31 13F AMETEK COM 031100100 283,048 -22,077 -7.24 51,766 2.89 0.0282
2024-02-14 2023-12-31 13F AMETEK COM 031100100 305,125 -14,596 -4.57 50,313 6.50 0.0300
2023-11-14 2023-09-30 13F AMETEK COM 031100100 319,721 -25,388 -7.36 47,245 -15.43 0.0309
2023-08-14 2023-06-30 13F AMETEK COM 031100100 345,109 -2,566 -0.74 55,863 10.56 0.0347
2023-05-15 2023-03-31 13F AMETEK COM 031100100 347,675 -55,113 -13.68 50,526 -10.22 0.0333
2023-02-14 2022-12-31 13F AMETEK COM 031100100 402,788 16,623 4.30 56,278 28.50 0.0402
2023-01-13 2022-09-30 13F/A-1 AMETEK COM 031100100 386,165 -3,296 -0.85 43,797 2.32 0.0328
2022-11-14 2022-09-30 13F AMETEK COM 031100100 386,165 -3,296 43,797 0.0328
2022-08-15 2022-06-30 13F AMETEK COM 031100100 389,461 -18,820 -4.61 42,802 -21.28 0.0295
2022-05-16 2022-03-31 13F AMETEK COM 031100100 408,281 8,255 2.06 54,374 -7.56 0.0263
2022-02-14 2021-12-31 13F AMETEK COM 031100100 400,026 -41,474 -9.39 58,821 7.44 0.0245
2021-11-16 2021-09-30 13F AMETEK COM 031100100 441,500 -52,435 -10.62 54,750 -16.97 0.0239
2021-08-16 2021-06-30 13F AMETEK COM 031100100 493,935 343 0.07 65,938 4.58 0.0282
2021-05-17 2021-03-31 13F AMETEK COM 031100100 493,592 -56,123 -10.21 63,050 -5.16 0.0288
2021-02-16 2020-12-31 13F AMETEK COM 031100100 549,715 -4,947 -0.89 66,480 20.58 0.0309
2020-11-16 2020-09-30 13F AMETEK COM 031100100 554,662 -183,509 -24.86 55,133 -16.42 0.0287
2020-08-14 2020-06-30 13F AMETEK COM 031100100 738,171 -146,243 -16.54 65,968 3.57 0.0370
2020-05-14 2020-03-31 13F AMETEK COM 031100100 884,414 417,072 89.24 63,697 36.66 0.0438
2020-02-18 2019-12-31 13F AMETEK INC COM 031100100 467,342 -190,421 -28.95 46,611 -22.82 0.0239
2019-11-14 2019-09-30 13F AMETEK INC COM 031100100 657,763 6,604 1.01 60,396 2.11 0.0327
2019-07-31 2019-06-30 13F AMETEK INC COM 031100100 651,159 -1,041,242 -61.52 59,150 -57.88 0.0322
2019-04-30 2019-03-31 13F AMETEK INC COM 031100100 1,692,401 -93,665 -5.24 140,419 16.13 0.0778
2019-02-06 2018-12-31 13F AMETEK INC COM 031100100 1,786,066 -1,544,698 -46.38 120,917 -54.12 0.0771
2018-11-09 2018-09-30 13F AMETEK INC COM 031100100 3,330,764 -147,962 -4.25 263,530 4.98 0.1408
2018-08-10 2018-06-30 13F AMETEK INC COM 031100100 3,478,726 -1,581,187 -31.25 251,026 -34.70 0.1431
2018-05-14 2018-03-31 13F AMETEK INC COM 031100100 5,059,913 -851,948 -14.41 384,400 -10.28 0.2265
2018-03-12 2017-12-31 13F/A-1 AMETEK INC COM 031100100 5,911,861 272,259 4.83 428,434 15.03 0.2638
2018-02-09 2017-12-31 13F AMETEK INC COM 031100100 5,911,861 272,259 428,434
2017-11-14 2017-09-30 13F AMETEK INC COM 031100100 5,639,602 -764,068 -11.93 372,439 -3.98 0.2387
2017-08-17 2017-06-30 13F/A-1 AMETEK INC COM 031100100 6,403,670 6,374,794 22,076.44 387,870 24,731.63 0.2643
2017-08-14 2017-06-30 13F AMETEK INC COM 031100100 6,403,670 6,374,794 387,870
2017-05-03 2017-03-31 13F AMETEK INC COM 031100100 28,876 -4,251 -12.83 1,562 -2.98 0.0110
2017-01-30 2016-12-31 13F AMETEK INC COM 031100100 33,127 4,850 17.15 1,610 19.17 0.0119
2016-10-24 2016-09-30 13F AMETEK INC COM 031100100 28,277 0 0.00 1,351 3.37 0.0100
2016-07-29 2016-06-30 13F AMETEK INC COM 031100100 28,277 0 0.00 1,307 -7.50 0.0109
2016-05-12 2016-03-31 13F AMETEK INC COM 031100100 28,277 0 0.00 1,413 -6.73 0.0115
2016-02-03 2015-12-31 13F AMETEK INC COM 031100100 28,277 0 0.00 1,515 2.43 0.0122
2015-11-16 2015-09-30 13F AMETEK INC COM 031100100 28,277 0 0.00 1,479 -4.52 0.0130
2015-08-17 2015-06-30 13F AMETEK INC COM 031100100 28,277 0 0.00 1,549 4.31 0.0122
2015-06-02 2015-03-31 13F/A-1 AMETEK INC COM 031100100 28,277 0 0.00 1,485 -0.20 0.0115
2015-05-15 2015-03-31 13F AMETEK INC COM 031100100 28,277 1,485
2015-02-12 2014-12-31 13F AMETEK INC COM 031100100 28,277 -12,546 -30.73 1,488 -27.41 0.0107
2014-11-12 2014-09-30 13F AMETEK INC COM 031100100 40,823 0 0.00 2,050 -3.94 0.0193
2014-08-13 2014-06-30 13F AMETEK INC COM 031100100 40,823 0 0.00 2,134 1.52 0.0199
2014-05-08 2014-03-31 13F AMETEK INC COM 031100100 40,823 7,200 21.41 2,102 18.76 0.0205
2014-01-14 2013-12-31 13F AMETEK INC COM 031100100 33,623 6,749 25.11 1,770 43.09 0.0179
2013-11-12 2013-09-30 13F AMETEK INC COM 031100100 26,874 0 0.00 1,237 6.45 0.0136
2013-08-15 2013-06-30 13F AMETEK INC COM 031100100 26,874 26,874 1,162 0.0136
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.