AMST AMERICAN STONE INDUTRIES
AMERICAN STONE INDUTRIES (AMST) Institutional Ownership
What the institutions did with AMST 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.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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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 |
|---|---|---|
| Focus Partners Wealth | 167.4K | 42.7% |
| GOLDMAN SACHS GROUP INC | 59.4K | 15.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 32.7K | 8.3% |
| STATE STREET CORP | 31.6K | 8.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 30.2K | 7.7% |
| Warberg Asset Management LLC | 14.3K | 3.6% |
| VANGUARD FIDUCIARY TRUST CO | 13.8K | 3.5% |
| JANE STREET GROUP, LLC | 12.8K | 3.3% |
| RENAISSANCE TECHNOLOGIES LLC | 10.1K | 2.6% |
| OSAIC HOLDINGS, INC. | 10.0K | 2.5% |
| Tower Research Capital LLC (TRC) | 4.1K | 1.1% |
| UBS Group AG | 3.4K | 0.9% |
| ROYAL BANK OF CANADA | 2.7K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| GOLDMAN SACHS GROUP INC | New | 0 | 59.4K | +59.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 53.6K | 32.7K | -20.9K |
| Warberg Asset Management LLC | New | 0 | 14.3K | +14.3K |
| JANE STREET GROUP, LLC | New | 0 | 12.8K | +12.8K |
| XTX Topco Ltd | Sold Out | 10.2K | 0 | -10.2K |
| RENAISSANCE TECHNOLOGIES LLC | New | 0 | 10.1K | +10.1K |
| JPMORGAN CHASE & CO | Sold Out | 5.9K | 0 | -5.9K |
| ROYAL BANK OF CANADA | Increased | 25 | 2.7K | +2.7K |
| Tower Research Capital LLC (TRC) | Increased | 1.8K | 4.1K | +2.4K |
| Focus Partners Wealth | Increased | 166.0K | 167.4K | +1.4K |
| UBS Group AG | Increased | 2.7K | 3.4K | +713 |
| Caitong International Asset Management Co., Ltd | Sold Out | 3 | 0 | -3 |
| CITIGROUP INC | Sold Out | 1 | 0 | -1 |
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.