6 institutions reported holding $142.7M of HARBOR ETF TRUST (EFFI) in SEC 13F filings for 2026-06-30. Largest institutional holders: STATE OF WISCONSIN INVESTMENT BOARD ($139.5M), Gateway Wealth Partners, LLC ($2.1M), FMR LLC ($719,281), JANE STREET GROUP, LLC ($389,699), INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC ($25,306). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | STATE OF WISCONSIN INVESTMENT BOARD | $139.5M | 5.5M | Hold |
| 2 | Gateway Wealth Partners, LLC | $2.1M | 82,552 | Trimmed |
| 3 | FMR LLC | $719,281 | 28,365 | Added |
| 4 | JANE STREET GROUP, LLC | $389,699 | 15,368 | Trimmed |
| 5 | INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | $25,306 | 1,000 | Hold |
| 6 | UBS Group AG | $507 | 20 | Trimmed |
Source: SEC Form 13F filings · as of 2026-06-30