2 institutions reported holding $117.7M of HARBOR ETF TRUST (EFFE) in SEC 13F filings for 2026-03-31. Largest institutional holders: STATE OF WISCONSIN INVESTMENT BOARD ($117.4M), JANE STREET GROUP, LLC ($288,515). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | STATE OF WISCONSIN INVESTMENT BOARD | $117.4M | 5.1M | Hold |
| 2 | JANE STREET GROUP, LLC | $288,515 | 12,632 | Trimmed |
Source: SEC Form 13F filings · as of 2026-03-31