Institutional Holders (2026 Q1)
2K + investorsExplore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in ADI. Verified SEC 13F-HR filings.
| # | Investor | % of Portfolio | Shares | Mkt Value |
|---|---|---|---|---|
| 1 | CENTRAL SECURITIES CORP | 9.19% | 350,000 | $111.3M |
| 2 | Silverberg Bernstein Capital Management LLC | 6.22% | 35,509 | $11.3M |
| 3 | Phraction Management LLC | 5.05% | 76,630 | $24.4M |
| 4 | DUDLEY & SHANLEY, INC. | 4.95% | 95,121 | $30.3M |
| 5 | Baker Chad R | 4.61% | 76,865 | $24.5M |
| 6 | SOMERVILLE KURT F | 4.60% | 54,825 | $17.4M |
| 7 | Notis-McConarty Edward | 4.59% | 24,996 | $10.1M |
| 8 | Axecap Investments, LLC | 4.48% | 20,469 | $6.5M |
| 9 | PUZO MICHAEL J | 4.47% | 48,251 | $15.4M |
| 10 | GRANDFIELD & DODD, LLC | 4.46% | 248,177 | $79.0M |
| 11 | Broderick Brian C | 4.44% | 75,757 | $24.1M |
| 12 | GPM Growth Investors, Inc. | 4.38% | 32,737 | $10.4M |
| 13 | ABSHER WEALTH MANAGEMENT, LLC | 4.36% | 116,855 | $37.2M |
| 14 | Hemenway Trust Co LLC | 4.22% | 164,880 | $52.5M |
| 15 | CANTILLON CAPITAL MANAGEMENT LLC | 4.04% | 1,911,491 | $608.1M |
| 16 | Katamaran Capital LLP | 4.01% | 15,657 | $5.0M |
| 17 | Reynders McVeigh Capital Management, LLC | 3.94% | 245,252 | $78K |
| 18 | Midway Capital Research & Management | 3.68% | 12,279 | $3.9M |
| 19 | ARGUS INVESTORS' COUNSEL, INC. | 3.48% | 12,290 | $3.9M |
| 20 | Paradiem, LLC | 3.34% | 47,717 | $15.2M |
| 21 | CAMPBELL NEWMAN ASSET MANAGEMENT INC | 3.25% | 125,857 | $40.0M |
| 22 | McCollum Christoferson Group LLC | 3.12% | 96,765 | $10.4M |
| 23 | PROFESSIONAL ADVISORY SERVICES INC | 2.93% | 66,623 | $21K |
| 24 | Banque de Luxembourg S.A. | 2.85% | 17,318 | $5.5M |
| 25 | MARKEL GROUP INC. | 2.73% | 1,023,245 | $325.5M |
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|