299 + Investors. Track Smart Money conviction in ATMU. See who's accumulating, reducing, or initiating positions.
Based on 292 hedge funds · latest filing: 2025 Q4 · updated quarterly
Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.
In 2025 Q4, 160 hedge funds were net buyers of ATMU (52 opened a new position, 108 added to an existing one), while 134 reduced or exited (101 trimmed, 33 sold completely) — a 54% buyer ratio, indicating a slight buying edge. Net buying has persisted for two consecutive quarters, a positive momentum signal. 47% of total institutional value in ATMU is held by top-100 AUM funds, reflecting elite-tier ownership quality. Net fund flow last quarter: +19 funds (more new holders than closures). Total institutional holders: 292.
Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.
Many quality funds hold this stock, but top-tier positions remain relatively small.
Track Smart Money conviction in ATMU. See who's accumulating, reducing, or initiating positions.
| Metric | All 13F Filers (2025 Q4) | Prior (2025 Q3) | Change |
|---|---|---|---|
| Funds Holding | 299 | 281 | 6.41% |
| 13F Shares | 81M | 82M | -2.01% |
| Total Value | $3.94B | $3.52B | 11.87% |
| New Positions | 52 | 46 | +6 |
| Increased Positions | 118 | 83 | +35 |
| Closed Positions | 33 | 29 | +4 |
| Reduced Positions | 111 | 123 | -12 |
| Total Calls | 5 | 6 | -16.67% |
| Total Puts | 3 | 3 | - |
| PUT/CALL Ratio | 0.6 | 0.5 | Bullish |
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| Beta (5Y Monthly) | -- |
| Short Ratio (Days to Cover) | -- |
| Short % of Float | -- |
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| Return on Assets (ttm) | -- |
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| Net Income Avi to Common (ttm) | -- |
| Diluted EPS (ttm) | -- |
| Total Cash (mrq) | -- |
| Total Debt/Equity (mrq) | -- |
| Levered Free Cash Flow (ttm) | -- |
Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in ATMU. Verified SEC 13F-HR filings.
| Investor | Ownership History |
% of Portfolio | Prev % | Rank | Conviction | Avg Buy Price | 13F Score™ 3Y / 7Y | Sell Timing | Shares | Mkt Value | Change | Change % | Source | Quarter | Filed |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Buying streak — 2 quarters in a row: For 2 consecutive quarters, more hedge funds added ATMU than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.
Slight buying edge — 54% buying: Last quarter: 160 funds bought or added vs 134 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.
Elite ownership — 47% AUM from top-100 funds: 40 of 292 holders are among the 100 largest funds by AUM, controlling 47% of total institutional value in ATMU. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.
Mixed — 25% long-term, 23% new: Of the 292 current holders: 72 (25%) held >2 years, 152 held 1–2 years, and 68 entered in the last year. A mixed base — the stock has long-term believers but also recent buyers who haven't been tested by a downturn yet.
All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.
Disclaimer: The information on this page is for informational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Institutional holdings data is sourced from SEC Form 13F filings and reflects positions as of the filing date. Past performance of any fund or portfolio is not indicative of future results. 13Foresight is not a registered investment adviser. Always conduct your own due diligence before making investment decisions.