7 institutions reported holding $3.4M of TIDAL TRUST III (CPXR) in SEC 13F filings for 2026-03-31. Largest institutional holders: SUSQUEHANNA INTERNATIONAL GROUP, LLP ($1.0M), FLOW TRADERS U.S. LLC ($880,000), CITADEL ADVISORS LLC ($659,627), Bank of New York Mellon Corp ($497,400), HRT FINANCIAL LP ($304,000). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.0M | 40,294 | New |
| 2 | FLOW TRADERS U.S. LLC | $880,000 | 35,394 | New |
| 3 | CITADEL ADVISORS LLC | $659,627 | 26,523 | New |
| 4 | Bank of New York Mellon Corp | $497,400 | 20,000 | New |
| 5 | HRT FINANCIAL LP | $304,000 | 12,262 | New |
| 6 | SIMPLEX TRADING, LLC | $74,261 | 2,986 | New |
| 7 | Tower Research Capital LLC (TRC) | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31