23 institutions reported holding $360,770 of MAINZ BIOMED N V (QUCY) in SEC 13F filings for 2026-06-30. Largest institutional holders: JANE STREET GROUP, LLC ($132,782), Virtu Financial LLC ($64,000), UBS Group AG ($40,993), Steward Partners Investment Advisory, LLC ($31,400), XTX Topco Ltd ($17,884). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | JANE STREET GROUP, LLC | $132,782 | 84,574 | Added |
| 2 | Virtu Financial LLC | $64,000 | 41,068 | Added |
| 3 | UBS Group AG | $40,993 | 26,110 | Trimmed |
| 4 | Steward Partners Investment Advisory, LLC | $31,400 | 20,000 | Trimmed |
| 5 | XTX Topco Ltd | $17,884 | 11,391 | Trimmed |
| 6 | MORGAN STANLEY | $17,564 | 11,187 | Added |
| 7 | PROFESSIONAL ADVISORY SERVICES INC | $16,000 | 10,000 | New |
| 8 | Journey Advisory Group, LLC | $15,700 | 10,000 | Trimmed |
| 9 | Keystone Financial Group, Inc. | $8,321 | 5,300 | New |
| 10 | Tower Research Capital LLC (TRC) | $6,280 | 4,000 | New |
| 11 | OSAIC HOLDINGS, INC. | $3,438 | 2,190 | New |
| 12 | SBI Securities Co., Ltd. | $2,024 | 1,289 | Trimmed |
| 13 | Provenance Wealth Advisors, LLC | $1,838 | 1,171 | Hold |
| 14 | NBC SECURITIES, INC. | $1,240 | 790 | New |
| 15 | Newbridge Financial Services Group, Inc. | $785 | 500 | Hold |
| 16 | HighMark Wealth Management LLC | $314 | 200 | Hold |
| 17 | IFP Advisors, Inc | $141 | 90 | Hold |
| 18 | CITIGROUP INC | $66 | 42 | Added |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $0 | 0 | Exited |
| 20 | TWO SIGMA SECURITIES, LLC | $0 | 0 | Exited |
| 21 | Caitong International Asset Management Co., Ltd | $0 | 0 | Exited |
| 22 | BNP PARIBAS FINANCIAL MARKETS | $0 | 0 | Exited |
| 23 | HARBOUR INVESTMENTS, INC. | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-06-30