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Portfolio (Quarterly) Guide ↗

GROUP ONE TRADING LLC

· CIK 0000932540
13F Portfolio $71.1B AUM 8,032 positions Filed Aug 14, 2026 EDGAR ↗ ← All Funds
Q2 2026 · All 7824 New
Page 328 of 392  ·  7,824 positions
# Ticker Company Sector Shares Value ↓ % Port Chg Shares Chg % Period Price ① Since Period ①
6541 CALL SYNDAX PHARMACEUTICALS INC 600.0 $13K NEW $21.86
6542 CALL RIBBON COMMUNICATIONS INC 5,600.0 $13K NEW $2.34
6543 PUT NAKAMOTO INC 3,300.0 $13K NEW $3.95
6544 COMMERCE.COM INC 4,402.0 $13K NEW $2.96
6545 FULC FULCRUM THERAPEUTICS INC Healthcare 3,556.0 $13K NEW $3.66 +4.5%
6546 PUT ARBUTUS BIOPHARMA CORP 2,700.0 $13K NEW $4.80
6547 POR PORTLAND GEN ELEC CO Utilities 250.0 $13K NEW $51.83 -4.2%
6548 ORKA ORUKA THERAPEUTICS INC Healthcare 136.0 $13K NEW $95.17 +7.7%
6549 CALL NATURAL GAS SVCS GROUP INC 300.0 $13K NEW $43.14
6550 XES SPDR SERIES TRUST 115.0 $13K NEW $112.08 +5.2%
6551 CALL DENALI THERAPEUTICS INC 500.0 $13K NEW $25.72
6552 PUT PIMCO ETF TR 200.0 $13K NEW $64.10
6553 INVESTMENT MANAGERS SER TR 1,100.0 $13K NEW $11.65
6554 PUT INVESTMENT MANAGERS SER TR 1,100.0 $13K NEW $11.65
6555 CALL LEONARDO DRS INC 300.0 $13K NEW $42.67
6556 VYGR VOYAGER THERAPEUTICS INC Healthcare 3,653.0 $13K NEW $3.50 -3.0%
6557 PUT RIMINI STR INC DEL 3,000.0 $13K NEW $4.26
6558 PUT GEVO INC 8,500.0 $13K NEW $1.50
6559 TU TELUS CORPORATION Communication Services 1,206.0 $13K NEW $10.57 -6.8%
6560 CALL FREIGHTCAR AMER INC 1,300.0 $13K NEW $9.74
Page 328 of 392  ·  7,824 positions

Period Price is the implied market price on the last day of the reporting period, calculated as reported value ÷ shares held. It is not the fund's purchase price or cost basis — the fund may have initiated or added to the position at any point during the quarter at a different price. Since Period shows the price change from that quarter-end snapshot to today's last price — it reflects stock movement after the report date, not the fund's actual return.

Sector Allocation
Technology 30.7%
Consumer Cyclical 13.4%
Healthcare 12.8%
Financial Services 9.6%
Industrials 9.3%
Basic Materials 7.0%
Energy 5.5%
Communication Services 5.3%
Consumer Defensive 3.7%
Utilities 1.7%