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AME in the 13F filings

Ametek Inc · CUSIP 031100100

Sector · IndustrialsTheme · Industrials and automation· L3VLUP-defined
Quarter
Q3 2026 · early filersQ2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023
Quarter end
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 22 Jan 2026
Managers listing it
41
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 29 listed it in both
Shares listed
35,961,407
combined, among listed positions
Reported value
$7.4bn
combined, at the quarter end

Among the 92 comparable managers: 22 buyers (opened or added shares) and 21 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +2,157,634.

Managers listing AME in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

41 of 41 holders

ActionFiling
T. Rowe Price Associates Inc7,892,014$1.6bn0.17%Trimmed-1,937,46717 Feb 2026 (the filing on sec.gov)
Fidelity (FMR LLC)4,497,741$923munder 0.1%Added+416,20417 Feb 2026 (the filing on sec.gov)
Invesco Ltd4,281,482$879m0.08%Trimmed-182,03619 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP2,807,664$576m0.10%Added+2,110,81817 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC1,735,601$356m0.05%Added+492,35317 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.1,426,934$293m0.16%Added+555,06417 Feb 2026 (the filing on sec.gov)
Man Group PLC1,097,509$225m0.38%Added+312,48917 Feb 2026 (the filing on sec.gov)
Capital World Investors1,090,990$224munder 0.1%Trimmed-703,48911 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC1,070,555$220m0.28%Added+903,06117 Feb 2026 (the filing on sec.gov)
Two Sigma Investments LP1,010,471$207m0.29%Added+332,71517 Feb 2026 (the filing on sec.gov)
MFS Investment Management959,937$197m0.06%Added+94,54422 Jan 2026 (the filing on sec.gov)
AQR Capital Management LLC897,423$184m0.10%Trimmed-6,61117 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC885,001$182m0.14%Added+63,63227 Oct 2026 (the filing on sec.gov)
Millennium Management LLC812,858$167m0.07%Trimmed-32,48817 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC776,060$159m0.56%Added+68,04717 Feb 2026 (the filing on sec.gov)
Two Sigma Advisers LP651,600$134m0.26%Added+261,40017 Feb 2026 (the filing on sec.gov)
GAMCO Investors Inc606,859$125m1.20%Trimmed-15,8905 Feb 2026 (the filing on sec.gov)
Freestone Grove Partners LP593,885$122m0.88%Added+117,85017 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC494,316$101m0.17%Trimmed-48,77810 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP444,328$91m0.05%Trimmed-177,40213 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd399,153$82munder 0.1%Added+12,45117 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP278,219$57munder 0.1%Trimmed-6,85417 Feb 2026 (the filing on sec.gov)
Artisan Partners LP179,025$37m0.06%Newnew17 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC173,538$36m0.16%Trimmed-194,84717 Feb 2026 (the filing on sec.gov)
Renaissance Technologies LLC154,650$32munder 0.1%Trimmed-101,30012 Feb 2026 (the filing on sec.gov)
Page 1 of 2

Largest increases and reductions, by shares

Q3 2025 to Q4 2025, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (4)

Exited (2)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
22 in Q3 2024 to 34 in Q2 2026

Tracked managers listing it, at least.

0102030402014201620182020202220242026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
AME by quarter
QuarterHoldersReported valueBuyersSellers
Q2 201312$1.8bnn.a.n.a.
Q3 201314$2.1bnn.a.n.a.
Q4 201310$2.5bnn.a.n.a.
Q1 201411$2.3bnn.a.n.a.
Q2 201415$2.6bnn.a.n.a.
Q3 201417$2.6bnn.a.n.a.
Q4 201410$3.1bnn.a.n.a.
Q1 201512$3.4bnn.a.n.a.
Q2 20158$3.8bnn.a.n.a.
Q3 20159$3.7bnn.a.n.a.
Q4 20159$3.7bnn.a.n.a.
Q1 201619$3.3bnn.a.n.a.
Q2 201619$3.2bnn.a.n.a.
Q3 201619$3.1bnn.a.n.a.
Q4 201619$2.3bnn.a.n.a.
Q1 201713$2.6bnn.a.n.a.
Q2 201714$3.0bnn.a.n.a.
Q3 201716$3.0bnn.a.n.a.
Q4 201717$3.2bnn.a.n.a.
Q1 201817$3.1bnn.a.n.a.
Q2 201819$2.8bnn.a.n.a.
Q3 201818$3.1bnn.a.n.a.
Q4 201823$2.8bnn.a.n.a.
Q1 201921$3.2bnn.a.n.a.
Q2 201917$3.5bnn.a.n.a.
Q3 201916$3.5bnn.a.n.a.
Q4 201917$3.6bnn.a.n.a.
Q1 202019$2.4bnn.a.n.a.
Q2 202019$3.1bnn.a.n.a.
Q3 202020$3.2bnn.a.n.a.
Q4 202020$4.1bnn.a.n.a.
Q1 202121$3.9bnn.a.n.a.
Q2 202121$4.1bnn.a.n.a.
Q3 202127$4.2bnn.a.n.a.
Q4 202128$4.7bnn.a.n.a.
Q1 202226$4.3bnn.a.n.a.
Q2 202232$3.6bnn.a.n.a.
Q3 202230$3.8bnn.a.n.a.
Q4 202228$4.9bnn.a.n.a.
Q1 202327$5.8bnn.a.n.a.
Q2 202325$6.4bnn.a.n.a.
Q3 202328$5.7bnn.a.n.a.
Q4 202322$5.9bn517
Q1 202423$6.2bn1311
Q2 202424$6.3bn1214
Q3 202422$6.3bn1212
Q4 202426$6.3bn1611
Q1 202525$5.5bn1412
Q2 202531$6.0bn2012
Q3 202532$6.2bn1814
Q4 202531$7.3bn2221
Q1 202634$7.1bn2419
Q2 202634$7.6bn2022

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

AME and GE →AME and LRCX →AME and GEV →Choose a stock to compare with AME →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own AME, latest filings →Back to the 13F Explorer →