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MMS · 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.

MMSMCO
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.
  • MMS
  • MCO
010203040202120222023202420252026
Holders and value by quarter
QuarterMMSMCO
Q3 20205 holders, $301m30 holders, $17.0bn
Q4 20205 holders, $287m21 holders, $16.9bn
Q1 20213 holders, $342m17 holders, $16.9bn
Q2 20214 holders, $371m16 holders, $20.2bn
Q3 20213 holders, $369m25 holders, $19.9bn
Q4 20216 holders, $402m25 holders, $22.0bn
Q1 20225 holders, $345m22 holders, $19.1bn
Q2 20224 holders, $269m19 holders, $15.4bn
Q3 20227 holders, $276m21 holders, $13.6bn
Q4 20226 holders, $358m17 holders, $15.5bn
Q1 20235 holders, $854m20 holders, $17.3bn
Q2 20234 holders, $1.1bn25 holders, $19.4bn
Q3 20234 holders, $949m21 holders, $17.2bn
Q4 20236 holders, $1.1bn21 holders, $22.3bn
Q1 20244 holders, $961m22 holders, $21.9bn
Q2 20244 holders, $977m24 holders, $23.6bn
Q3 20246 holders, $1.1bn31 holders, $26.8bn
Q4 20247 holders, $788m31 holders, $25.7bn
Q1 20259 holders, $804m30 holders, $25.2bn
Q2 20258 holders, $786m30 holders, $26.8bn
Q3 202510 holders, $908m31 holders, $26.0bn
Q4 20257 holders, $870m32 holders, $27.7bn
Q1 20263 holders, $563m28 holders, $23.9bn
Q2 20265 holders, $44m31 holders, $24.9bn
MMS

Maximus Inc

Holders
7
Reported value
$788m
Buyers
5
Sellers
1

Breadth +4 among 94 comparable managers.

Business and payment services
MCO

Moodys Corp

Holders
31
Reported value
$25.7bn
Buyers
11
Sellers
16

Breadth -5 among 94 comparable managers.

Business and payment servicesFinancial services · L3VLUP

Who holds both, Q4 2024

Among the 33 tracked managers listing any of them. "Only" is about listed positions: a manager may hold the other below its listed range.

Only MMS (2)

Two Sigma Advisers LP, Voloridge Investment Management LLC

Only MCO (26)

Acadian Asset Management LLC, Akre Capital Management LLC, AllianceBernstein LP, Arrowstreet Capital LP, Artisan Partners LP, Baillie Gifford & Co, Balyasny Asset Management LLC, Berkshire Hathaway Inc, Brevan Howard Capital Management LP, Bridgewater Associates LP, Citadel Advisors LLC, Dodge & Cox, GAMCO Investors Inc, Harris Associates LP, Hudson Bay Capital Management LP, Invesco Ltd, Man Group PLC, Markel Group Inc, Marshall Wace LLP, Maverick Capital Ltd, MFS Investment Management, Moore Capital Management LP, Neuberger Berman Group LLC, T. Rowe Price Associates Inc, TCI Fund Management Ltd, and 1 more

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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