BLOCK INC CL A is a security (CUSIP 852234953) tracked across SEC portfolio filings. 14 institutional managers reported $176.0M on Form 13F as of 2026-06-30.
| Manager | Location | Value | Shares |
|---|---|---|---|
| IMC-Chicago, LLC | CHICAGO, IL | $77.3M | — |
| Optiver Holding B.V. | AMSTERDAM, P7 | $56.7M | — |
| SIMPLEX TRADING, LLC | CHICAGO, IL | $18.5M | — |
| NATIONAL BANK OF CANADA /FI/ | MONTREAL, A8 | $9.6M | — |
| Maven Securities LTD | ST HELIER, Y9 | $6.9M | — |
| GROUP ONE TRADING, L.P. | CHICAGO, IL | $3.8M | — |
| JPMORGAN CHASE & CO | NEW YORK, NY | $2.9M | — |
| Marathon Trading Investment Management LLC | RADNOR, PA | $223K | — |
| Capital Markets Trading UK LLP | LONDON, X0 | $24K | — |
| HRT FINANCIAL LP | NEW YORK, NY | $17K | 283,600 |
| CHESAPEAKE ASSET MANAGEMENT LLC | NEW YORK, NY | $8K | — |
| CMT Capital Markets Trading GmbH | CHICAGO, IL | $3K | — |
| SG Americas Securities, LLC | NEW YORK, NY | $130 | — |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | BIRMINGHAM, AL | — | — |