Institutional Holders (2026 Q1)
287 + 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 | Caspian Capital LP | 17.38% | 267,724 | $17.9M |
| 2 | Pertento Partners LLP | 3.98% | 815,333 | $54.4M |
| 3 | Congruence Capital, LLC | 3.92% | 175,366 | $11.7M |
| 4 | Next Century Growth Investors LLC | 3.80% | 786,317 | $52.5M |
| 5 | Minerva Advisors LLC | 3.03% | 70,340 | $4.7M |
| 6 | Teton Advisors, LLC | 2.68% | 57,000 | $3.8M |
| 7 | Private Capital Management, LLC | 2.14% | 322,543 | $21.5M |
| 8 | Emerald Advisers, LLC | 0.95% | 449,126 | $30.0M |
| 9 | Needham Investment Management LLC | 0.93% | 272,500 | $18.2M |
| 10 | Hennessy Advisors Inc | 0.91% | 377,800 | $25.2M |
| 11 | Emerald Mutual Fund Advisers Trust | 0.90% | 279,159 | $18.6M |
| 12 | White Pine Capital LLC | 0.86% | 45,539 | $3.0M |
| 13 | Ironwood Investment Management LLC | 0.82% | 29,407 | $2.0M |
| 14 | Informed Momentum Co LLC | 0.77% | 99,453 | $6.6M |
| 15 | Lisanti Capital Growth, LLC | 0.69% | 40,820 | $2.7M |
| 16 | Harvest Investment Services, LLC | 0.44% | 36,143 | $2.4M |
| 17 | Petra Financial Advisors Inc | 0.43% | 10,311 | $688K |
| 18 | Ares Systematic Credit Ltd | 0.37% | 7,433 | $463K |
| 19 | RBF Capital, LLC | 0.35% | 100,372 | $6.7M |
| 20 | Mark Sheptoff Financial Planning, LLC | 0.35% | 8,850 | $653K |
| 21 | Pier 88 Investment Partners LLC | 0.29% | 17,600 | $1.2M |
| 22 | Peregrine Capital Management LLC | 0.28% | 113,520 | $7.6M |
| 23 | Skylands Capital, LLC | 0.25% | 28,800 | $1.9M |
| 24 | Royce & Associates LP | 0.24% | 363,383 | $24.2M |
| 25 | Kingdom Financial Group LLC. | 0.22% | 11,756 | $784K |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|