MAMO MAMMOTH ENTERTAINMENT INC
MAMMOTH ENTERTAINMENT INC (MAMO) Institutional Ownership
What the institutions did with MAMO last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BANK OF AMERICA CORP /DE/ | 250.0K | 42.7% |
| GEODE CAPITAL MANAGEMENT, LLC | 82.8K | 14.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 75.1K | 12.8% |
| CITIGROUP INC | 55.9K | 9.5% |
| BlackRock, Inc. | 31.1K | 5.3% |
| VANGUARD FIDUCIARY TRUST CO | 21.2K | 3.6% |
| TWO SIGMA SECURITIES, LLC | 18.5K | 3.2% |
| StoneX Group Inc. | 17.8K | 3.0% |
| NORTHERN TRUST CORP | 15.2K | 2.6% |
| XTX Topco Ltd | 15.1K | 2.6% |
| Tower Research Capital LLC (TRC) | 2.3K | 0.4% |
| UBS Group AG | 326 | 0.1% |
| SBI Securities Co., Ltd. | 6 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BANK OF AMERICA CORP /DE/ | New | 0 | 250.0K | +250.0K |
| CITIGROUP INC | New | 0 | 55.9K | +55.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 122.4K | 82.8K | -39.7K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 42.6K | 75.1K | +32.5K |
| TWO SIGMA SECURITIES, LLC | New | 0 | 18.5K | +18.5K |
| StoneX Group Inc. | New | 0 | 17.8K | +17.8K |
| BlackRock, Inc. | Increased | 14.3K | 31.1K | +16.8K |
| UBS Group AG | Reduced | 15.2K | 326 | -14.9K |
| RENAISSANCE TECHNOLOGIES LLC | Sold Out | 12.6K | 0 | -12.6K |
| Tower Research Capital LLC (TRC) | Reduced | 9.1K | 2.3K | -6.7K |
| NORTHERN TRUST CORP | Increased | 10.2K | 15.2K | +4.9K |
| XTX Topco Ltd | Increased | 13.1K | 15.1K | +2.0K |
| ROYAL BANK OF CANADA | Sold Out | 114 | 0 | -114 |
| Advisory Services Network, LLC | Sold Out | 91 | 0 | -91 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.