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WESTFIELD CAPITAL MANAGEMENT CO LP

Position in AME — Ametek Inc/

CIK 1177719 BOSTON, MA

Position in AME

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$175,115,688
+$15,239,141 QoQ
Shares Held
723,798
-3.0% QoQ
Ownership
0.316%
of shares outstanding
% of Portfolio
0.58%
of 13F equity value
Holder Rank
#53
of 1,197 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 83% Shared 0% None 17%

Common Shares in AME Over Time

Shares Held

Position Value (USD)

Position in Specialty Industrial Machinery

Industrials · as of Jun 30, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $1,186,816,315 across 9 Specialty Industrial Machinery names. AME ranks #3 (14.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
3 AME
Ametek Inc/
This page
723,798 $175,115,688

All Filings in AME

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $175,115,688 723,798
2026-03-31 $159,876,547 745,832
2025-12-31 $184,823,346 900,216
2025-09-30 $67,428,080 358,660
2025-06-30 $71,554,479 395,416
2025-03-31 $70,039,978 406,878
2024-12-31 $74,151,573 411,359
2024-09-30 $73,552,837 428,355
2024-06-30 $73,851,863 442,996
2024-03-31 $174,413,988 953,603
2023-12-31 $161,565,817 979,840
2023-09-30 $153,675,276 1,040,033
2023-06-30 $173,504,926 1,071,812
2023-03-31 $159,404,338 1,096,844
2022-12-31 $165,528,240 1,184,714
2022-09-30 $133,997,657 1,181,533
2022-06-30 $130,036,023 1,183,329
2022-03-31 $171,936,445 1,291,008
2021-12-31 $181,692,475 1,235,667
2021-09-30 $160,310,083 1,292,719
2021-06-30 $176,179,549 1,319,697
2021-03-31 $176,564,883 1,382,329
2020-12-31 $180,835,535 1,495,250
2020-09-30 $152,177,722 1,530,963
2020-06-30 $133,893,419 1,498,192
2020-03-31 $109,890,060 1,525,827