Institutional Holders (2026 Q2)
670 + investorsExplore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in ATI. Verified SEC 13F-HR filings.
| # | Investor | % of Portfolio | Shares | Mkt Value |
|---|---|---|---|---|
| 1 | Square Wave Capital, LLC | 13.08% | 444,800 | $87.7M |
| 2 | Dendur Capital LP | 10.44% | 1,009,000 | $198.9M |
| 3 | Mountaineer Partners Management, LLC | 9.02% | 60,419 | $11.9M |
| 4 | H Squared Management LP | 3.94% | 31,200 | $6.1M |
| 5 | Candelo Capital Management LP | 3.36% | 27,649 | $5.4M |
| 6 | KLCM Advisors, Inc. | 3.22% | 207,475 | $40.9M |
| 7 | RPg Family Wealth Advisory, LLC | 3.14% | 76,727 | $15.1M |
| 8 | S Squared Technology, LLC | 2.45% | 40,000 | $7.9M |
| 9 | 1492 Capital Management LLC | 2.39% | 41,060 | $8.1M |
| 10 | Tribune Investment Group LP | 2.35% | 29,380 | $5.8M |
| 11 | Mengis Capital Management, Inc. | 2.09% | 69,614 | $13.7M |
| 12 | Tran Capital Management, L.P. | 2.04% | 89,993 | $17.7M |
| 13 | Jones Road Capital Management, L.P. | 2.01% | 5,000 | $986K |
| 14 | Graphene Investments SAS | 1.93% | 16,800 | $3.3M |
| 15 | Legacy Capital Wealth Management, LLC | 1.80% | 19,903 | $3.9M |
| 16 | Pinnbrook Capital Management LP | 1.72% | 82,081 | $16.2M |
| 17 | Globeflex Capital L P | 1.69% | 67,186 | $13.2M |
| 18 | Register Financial Advisors LLC | 1.56% | 25,853 | $5.1M |
| 19 | Dsm Capital Partners LLC | 1.49% | 441,048 | $86.9M |
| 20 | Artemis Investment Management LLP | 1.48% | 841,493 | $165.9M |
| 21 | Cannon Global Investment Management, LLC | 1.39% | 2,500 | $493K |
| 22 | Polen Capital Management LLC | 1.39% | 819,236 | $161.5M |
| 23 | Gallo Partners, LP | 1.30% | 2,974 | $586K |
| 24 | Pvg Asset Management Corp | 1.19% | 10,475 | $2.1M |
| 25 | Marathon Partners Equity Management, LLC | 1.10% | 6,000 | $1.2M |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|