8 institutions reported holding $86.4M of HORIZON CORE EQUITY ETF (STOX) in SEC 13F filings for 2026-03-31. Largest institutional holders: Bank of New York Mellon Corp ($56.6M), Cooper Financial Group ($23.5M), Cambridge Investment Research Advisors, Inc. ($4.7M), Simplicity Wealth,LLC ($661,781), GTS SECURITIES LLC ($454,325). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Bank of New York Mellon Corp | $56.6M | 2.1M | Added |
| 2 | Cooper Financial Group | $23.5M | 869,916 | New |
| 3 | Cambridge Investment Research Advisors, Inc. | $4.7M | 172,327 | Added |
| 4 | Simplicity Wealth,LLC | $661,781 | 24,467 | New |
| 5 | GTS SECURITIES LLC | $454,325 | 16,797 | New |
| 6 | JANE STREET GROUP, LLC | $360,008 | 13,310 | New |
| 7 | Horizon Investments, LLC | $45,552 | 1,684 | Added |
| 8 | OSAIC HOLDINGS, INC. | $11,956 | 442 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31