Stock Taper 
GROUP ONE TRADING, L.P.
Latest 13F filing data - Q2 2026
Holdings
(Top positions)| STOCK | TICKER | SHARES HELD▲ ▼ | VALUE▲ ▼ |
|---|---|---|---|
 Camtek Ltd. | CAMT | 387 | $63.13M |
 Jazz Pharmaceuticals plc | JAZZ | 386 | $93.01M |
 Materialise N.V. | MTLS | 384 | $2.85M |
 Eastern Bankshares, Inc. | EBC | 382 | $8.5M |
 MidCap Financial Investment Corporation | MFIC | 379 | $3.82M |
 Intercontinental Exchange, Inc. | ICE | 375 | $46.17M |
 Dyne Therapeutics, Inc. | DYN | 373 | $8.28M |
 iRhythm Technologies, Inc. | IRTC | 371 | $44.13M |
 Mirum Pharmaceuticals, Inc. | MIRM | 370 | $43.32M |
 Cardiol Therapeutics Inc. | CRDL | 366 | $388K |
 Waste Management, Inc. | WM | 364 | $81.13M |
 Hexcel Corporation | HXL | 361 | $36.12M |
 Knowles Corporation | KN | 353 | $14.64M |
 Zenas BioPharma, Inc. | ZBIO | 345 | $8.76M |
 Shutterstock, Inc. | SSTK | 343 | $4.79M |
 Columbia Banking System, Inc. | COLB | 341 | $10.93M |
 Parsons Corporation | PSN | 330 | $17.29M |
 Copa Holdings, S.A. | CPA | 327 | $50.87M |
 Adient plc | ADNT | 327 | $6.01M |
 Build-A-Bear Workshop, Inc. | BBW | 326 | $9.98M |