13F stock ownership research
MCO institutional ownership: holders, changes, and four-quarter trend
This reverse-ownership view starts with MCO and shows every matching position in SnowballHare's tracked 13F manager universe. It connects holder-level changes with four-quarter history and company research without presenting delayed filings as live ownership.
Deterministic analysis from filing data
The latest institutional read on MCO
The latest 13F cycle gives MCO a fresh ownership snapshot. 1 active managers reported $10.8B in aggregate value. Berkshire Hathaway is the largest tracked holder. The sample is too small for a broad concentration reading.
MCO's most visible fund moves were not evenly distributed. Coatue Management made the largest measured share-count move at -100.0%. 1 manager exited, including Coatue Management. These filings describe quarter-end positions and do not confirm what managers held after the reporting date.
MCO's ownership trend is more informative than one filing alone. Holder count is below the trailing average of 1.3. Aggregate value also moves with quarter-end share prices, so dollar changes do not measure active buying by themselves.
Peer ownership data gives the holder figures a reference point. Related ownership pages include COF, COIN, XYZ. Return to MCO stock research for financial statements, earnings, and company risks.
Current 13F snapshot
All institutional holders
Every row below links to the manager's full portfolio page. The table contains 2 current or exited observations for MCO, ordered by reported market value.
| Holder | Shares | Reported value | Portfolio weight | Share change | Status |
|---|---|---|---|---|---|
| Berkshire Hathaway2026-03-31 | 24,669,778 | $10.76B | 4.09% | 0.0% | Unchanged |
| Coatue Management2026-03-31 | 0 | $0 | 0.00% | -100.0% | Exited |
Quarter-over-quarter activity
Holder changes
New holders 0
- No matching holder in the current tracked quarter.
Increased 0
- No matching holder in the current tracked quarter.
Reduced 0
- No matching holder in the current tracked quarter.
Exited holders 1
- Coatue Management$32.83M · -100.0%
Manager universe
Holder type breakdown
Holder types are a deterministic classification of SnowballHare's small tracked-manager universe, not an SEC legal category. The breakdown helps distinguish concentrated investment firms from diversified institutions and family-office style portfolios.
Rolling filing history
Last 4 quarters
Quarterly totals aggregate only managers with a tracked filing for the period. A change can reflect buying or selling, stock-price movement, a new manager entering the dataset, or a missing comparable filing.
| Quarter | Holders | Reported value | Shares | New | Exits |
|---|---|---|---|---|---|
| 2026-03-31 | 1 | $10.76B | 24,669,778 | 0 | 1 |
| 2025-12-31 | 2 | $12.64B | 24,734,038 | 1 | 0 |
| 2025-09-30 | 1 | $11.75B | 24,669,778 | 0 | 0 |
| 2025-06-30 | 1 | $12.37B | 24,669,778 | 0 | 0 |
Financials
How MCO compares
- Holders
- 3
- Value
- $1.36B
- Top 5
- 100.0%
- Holders
- 1
- Value
- $414.33M
- Top 5
- 100.0%
- Holders
- 2
- Value
- $426.91M
- Top 5
- 100.0%
Peer pages are selected from the same sector and similar reported company scale when data is available. Compare holder count and concentration, but remember that the same limited manager universe can have very different relevance for different stocks.
Filing interpretation
Common questions about MCO institutional ownership
Who is the largest tracked institutional holder of MCO?
Berkshire Hathaway is the largest active holder in the current MCO sample, reporting $10.8B. The MCO holder table ranks every matched manager.
Which institution increased its MCO position the most?
No increase or new MCO position appears in the current tracked cycle. Review the MCO change section after the next filing update.
Which institution reduced or exited MCO most significantly?
Coatue Management recorded the largest reduction or exit by prior reported value. Compare it with the other MCO holder changes.
Did new holders enter or existing holders exit MCO?
No new MCO holder entered the tracked sample. 1 holder exited. Named managers are shown in the MCO activity grid.
How concentrated is tracked ownership in MCO?
The MCO sample contains too few active managers for a broad concentration conclusion. The MCO holder table shows the named positions that are available.
How has tracked ownership in MCO changed across four quarters?
The latest cycle has 1 active holders versus 1 in the oldest displayed comparison quarter. The MCO four-quarter series separates holder count, shares, and reported value.
What company evidence should be checked alongside MCO's 13F changes?
Use the MCO stock research page to compare institutional moves with revenue, margins, cash flow, insider filings, earnings, and company risks. A delayed ownership filing should not override newer operating evidence.
Primary-source record
Sources and methodology
Source: SEC EDGAR 13F-HR information tables for the managers SnowballHare currently tracks. Rows are aggregated by manager and ticker, then compared with the prior available filing. The dataset is delayed, partial, and historical by design.
Disclaimer: Historical filing data is not investment advice. Check material facts against original SEC records before acting.