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ACM · MCO in the 13F filings

Two to four stocks side by side among the 95 tracked managers: who lists them, how that has moved, who bought and sold in a quarter, and which managers hold more than one.

ACMMCO
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023

Holders over time

Tracked managers listing each stock every quarter, at least, or their combined reported value. A gap is a quarter in which no tracked manager listed it. Click a quarter to compare there.
  • ACM
  • MCO
010203040202120222023202420252026
Holders and value by quarter
QuarterACMMCO
Q3 202012 holders, $1.5bn30 holders, $17.0bn
Q4 202012 holders, $1.5bn21 holders, $16.9bn
Q1 20218 holders, $1.7bn17 holders, $16.9bn
Q2 20217 holders, $1.5bn16 holders, $20.2bn
Q3 20217 holders, $1.4bn25 holders, $19.9bn
Q4 20216 holders, $1.6bn25 holders, $22.0bn
Q1 20225 holders, $1.8bn22 holders, $19.1bn
Q2 20226 holders, $1.2bn19 holders, $15.4bn
Q3 20226 holders, $1.3bn21 holders, $13.6bn
Q4 20229 holders, $1.5bn17 holders, $15.5bn
Q1 20239 holders, $1.1bn20 holders, $17.3bn
Q2 20237 holders, $883m25 holders, $19.4bn
Q3 20236 holders, $739m21 holders, $17.2bn
Q4 202310 holders, $797m21 holders, $22.3bn
Q1 202414 holders, $894m22 holders, $21.9bn
Q2 202412 holders, $679m24 holders, $23.6bn
Q3 202413 holders, $1.0bn31 holders, $26.8bn
Q4 20249 holders, $701m31 holders, $25.7bn
Q1 202511 holders, $511m30 holders, $25.2bn
Q2 202511 holders, $986m30 holders, $26.8bn
Q3 202510 holders, $1.2bn31 holders, $26.0bn
Q4 202511 holders, $759m32 holders, $27.7bn
Q1 202612 holders, $279m28 holders, $23.9bn
Q2 202613 holders, $549m31 holders, $24.9bn
ACM

Aecom Technology Corp

Holders
12
Reported value
$279m
Buyers
25
Sellers
10

Breadth +15 among 91 comparable managers.

Business and payment services
MCO

Moodys Corp

Holders
28
Reported value
$23.9bn
Buyers
20
Sellers
24

Breadth -4 among 91 comparable managers.

Business and payment servicesFinancial services · L3VLUP

Who holds both, Q1 2026

Among the 35 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only ACM (7)

Bridgewater Associates LP, Freestone Grove Partners LP, Maverick Capital Ltd, Quantbot Technologies LP, Tudor Investment Corp, Verition Fund Management LLC, Winton Group Ltd

Only MCO (23)

Acadian Asset Management LLC, Akre Capital Management LLC, AllianceBernstein LP, AQR Capital Management LLC, Arrowstreet Capital LP, Baillie Gifford & Co, Berkshire Hathaway Inc, Capital Research Global Investors, Dodge & Cox, Egerton Capital UK LLP, Fidelity (FMR LLC), GAMCO Investors Inc, Harris Associates LP, Invesco Ltd, Man Group PLC, Markel Group Inc, Marshall Wace LLP, MFS Investment Management, Neuberger Berman Group LLC, Schonfeld Strategic Advisors LLC, T. Rowe Price Associates Inc, TCI Fund Management Ltd, Woodline Partners LP

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. Buyers and sellers count comparable managers (those that filed both quarters) by shares, so a rise in value with no rise in shares is the price. Large books are listed to their largest positions. These are 95 tracked managers, not the institutional market.

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