6 institutions reported holding $135.1M of HARBOR ETF TRUST (EFFI) in SEC 13F filings for 2026-03-31. Largest institutional holders: STATE OF WISCONSIN INVESTMENT BOARD ($130.4M), Gateway Wealth Partners, LLC ($3.6M), FMR LLC ($599,986), JANE STREET GROUP, LLC ($448,558), INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC ($24,061). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | STATE OF WISCONSIN INVESTMENT BOARD | $130.4M | 5.5M | Hold |
| 2 | Gateway Wealth Partners, LLC | $3.6M | 153,376 | New |
| 3 | FMR LLC | $599,986 | 25,301 | Trimmed |
| 4 | JANE STREET GROUP, LLC | $448,558 | 18,915 | New |
| 5 | INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC | $24,061 | 1,000 | Hold |
| 6 | UBS Group AG | $1,636 | 69 | Added |
Source: SEC Form 13F filings · as of 2026-03-31