Institutional Holders (2026 Q1)
265 + investorsExplore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in ATRO. Verified SEC 13F-HR filings.
| # | Investor | % of Portfolio | Shares | Mkt Value |
|---|---|---|---|---|
| 1 | Minerva Advisors LLC | 3.03% | 70,340 | $4.7M |
| 2 | EMERALD ADVISERS, LLC | 0.95% | 449,126 | $30.0M |
| 3 | HENNESSY ADVISORS INC | 0.91% | 377,800 | $25.2M |
| 4 | EMERALD MUTUAL FUND ADVISERS TRUST | 0.90% | 279,159 | $18.6M |
| 5 | WHITE PINE CAPITAL LLC | 0.86% | 45,539 | $3.0M |
| 6 | Lisanti Capital Growth, LLC | 0.69% | 40,820 | $2.7M |
| 7 | MARK SHEPTOFF FINANCIAL PLANNING, LLC | 0.35% | 8,850 | $653K |
| 8 | PIER 88 INVESTMENT PARTNERS LLC | 0.29% | 17,600 | $1.2M |
| 9 | PEREGRINE CAPITAL MANAGEMENT LLC | 0.28% | 113,520 | $7.6M |
| 10 | Skylands Capital, LLC | 0.25% | 28,800 | $1.9M |
| 11 | ROYCE & ASSOCIATES LP | 0.24% | 363,383 | $24.2M |
| 12 | Ellsworth Advisors, LLC | 0.22% | 17,291 | $1.2M |
| 13 | Optimize Financial Inc | 0.15% | 4,623 | $308K |
| 14 | HUNTER ASSOCIATES INVESTMENT MANAGEMENT LLC | 0.14% | 15,975 | $1K |
| 15 | Elyxium Wealth, LLC | 0.13% | 6,165 | $411K |
| 16 | Empirical Asset Management, LLC | 0.11% | 6,530 | $436K |
| 17 | Bayforest Capital Ltd | 0.11% | 1,490 | $99K |
| 18 | West Branch Capital LLC | 0.10% | 5,700 | $380K |
| 19 | JUPITER ASSET MANAGEMENT LTD | 0.10% | 280,976 | $18.7M |
| 20 | ARCADIA INVESTMENT MANAGEMENT CORP/MI | 0.10% | 8,451 | $564K |
| 21 | First Bank & Trust | 0.08% | 7,596 | $507K |
| 22 | SIERRA SUMMIT ADVISORS LLC | 0.06% | 6,529 | $436K |
| 23 | KFA Private Wealth Group, LLC | 0.06% | 3,697 | $247K |
| 24 | O'Keefe Stevens Advisory, Inc. | 0.06% | 3,584 | $239K |
| 25 | Abel Hall, LLC | 0.05% | 3,303 | $220K |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|