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Simplex Trading, LLC — 13F Holdings & Portfolio

CIK 1488542 · latest 13F-HR filed 2026-11-04

Backtest portfolio

Simplex Trading, LLC manages $183.82B in 13F-reported U.S. long-equity assets across 10,469 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are SPYM (15.91%), EFIV (9.49%), QQQ (6.57%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 929 new positions and exited 957; 767 existing positions rose in reported value and 956 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$183.82B

Long-equity book

Holdings
10,469

Distinct positions

Period
2026-09-30

Filed 2026-11-04

Q/Q Activity
+929 / −957 / ↑767 / ↓956

vs 2026-06-30

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Firm Profile & Key People

Name Title / Status Ownership Type

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 767 →

Top Trims

Show all 956 →

New Positions

Show all 929 →

Exited Positions

Show all 957 →

Simplex Trading, LLC Holdings (2026-09-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 STATE STR SPDR S&P 500 ETF T Put SPYM 78462F953 $29.25B 15.91% 38,353,300 SH
2 STATE STR SPDR S&P 500 ETF T Call EFIV 78462F903 $17.44B 9.49% 22,871,500 SH
3 INVESCO QQQ TR Put QQQ 46090E953 $12.08B 6.57% 16,327,300 SH
4 INVESCO QQQ TR Call QQQ 46090E903 $8.87B 4.82% 11,983,600 SH
5 ISHARES TR Put IFXAF 464287957 $5.11B 2.78% 18,385,800 SH
6 NVIDIA CORPORATION Put NVDA 67066G954 $3.64B 1.98% 15,951,700 SH
7 NVIDIA CORPORATION Call NVDA 67066G904 $3.59B 1.95% 15,726,900 SH
8 META PLATFORMS INC Call META 30303M902 $3.35B 1.82% 4,619,900 SH
9 MICRON TECHNOLOGY INC Put MU 595112953 $2.76B 1.50% 2,594,900 SH
10 MICRON TECHNOLOGY INC Call MU 595112903 $2.70B 1.47% 2,530,300 SH
11 TESLA INC Call TSLA 88160R901 $2.62B 1.42% 7,380,700 SH
12 APPLE INC Call AAPL 037833900 $2.41B 1.31% 7,248,500 SH
13 ADVANCED MICRO DEVICES INC Put AMD 007903957 $2.41B 1.31% 3,931,700 SH
14 SPDR GOLD TR Call GLD 78463V907 $2.21B 1.20% 5,800,600 SH
15 ADVANCED MICRO DEVICES INC Call AMD 007903907 $2.04B 1.11% 3,334,200 SH
16 APPLE INC Put AAPL 037833950 $1.97B 1.07% 5,906,000 SH
17 TESLA INC Put TSLA 88160R951 $1.95B 1.06% 5,508,200 SH
18 ISHARES TR Call IFXAF 464287907 $1.90B 1.03% 24,421,300 SH
19 ISHARES TR Call IFXAF 464287907 $1.73B 0.94% 6,221,100 SH
20 MICROSOFT CORP Call MSFT 594918904 $1.69B 0.92% 3,287,200 SH
21 META PLATFORMS INC Put META 30303M952 $1.67B 0.91% 2,306,400 SH
22 ALPHABET INC Call GGLAP 02079K905 $1.65B 0.90% 4,783,600 SH
23 ISHARES TR Put IFXAF 464287957 $1.62B 0.88% 20,844,700 SH
24 MICROSOFT CORP Put MSFT 594918954 $1.29B 0.70% 2,523,700 SH
25 SANDISK CORP Put — 80004C950 $1.17B 0.64% 674,600 SH
26 AMAZON COM INC Call AMZN 023135906 $1.06B 0.58% 4,268,800 SH
27 VANECK ETF TRUST Put GENZ 92189F952 $1.05B 0.57% 1,720,100 SH
28 AMAZON COM INC Put AMZN 023135956 $961.6M 0.52% 3,859,500 SH
29 SPDR GOLD TR Put GLD 78463V957 $921.1M 0.50% 2,418,700 SH
30 ALPHABET INC Put GGLAP 02079K955 $899.9M 0.49% 2,615,500 SH
31 STATE STR SPDR DOW JONES IND Call DIA 78467X909 $891.2M 0.48% 1,752,400 SH
32 PALANTIR TECHNOLOGIES INC Put PLTR 69608A958 $874.5M 0.48% 4,675,200 SH
33 ALPHABET INC Call GGLAP 02079K905 $850.0M 0.46% 2,494,700 SH
34 SANDISK CORP Call — 80004C900 $777.4M 0.42% 446,800 SH
35 ISHARES BITCOIN TRUST ETF Call IBIT 46438F901 $747.7M 0.41% 15,794,600 SH
36 INTEL CORP Call INTC 458140900 $718.5M 0.39% 5,976,300 SH
37 VANECK ETF TRUST Call GENZ 92189F902 $717.2M 0.39% 1,177,600 SH
38 BROADCOM INC Call AVGO 11135F901 $694.7M 0.38% 1,978,000 SH
39 INTEL CORP Put INTC 458140950 $686.0M 0.37% 5,705,800 SH
40 SPACE EXPLORATION TECHN CORP Put SPCX 84615Q953 $662.6M 0.36% 4,392,300 SH
41 SPACE EXPLORATION TECHN CORP Call SPCX 84615Q903 $645.6M 0.35% 4,279,200 SH
42 ISHARES BITCOIN TRUST ETF Put IBIT 46438F951 $632.1M 0.34% 13,353,400 SH
43 ISHARES SILVER TR Call SLV 46428Q909 $613.2M 0.33% 11,249,000 SH
44 BROADCOM INC Put AVGO 11135F951 $600.3M 0.33% 1,709,200 SH
45 ALPHABET INC Put GGLAP 02079K955 $592.6M 0.32% 1,739,300 SH
46 ORACLE CORP Call ORCL 68389X905 $582.9M 0.32% 4,245,200 SH
47 TAIWAN SEMICONDUCTOR MANUFAC Put TSM 874039950 $575.6M 0.31% 1,261,800 SH
48 PALANTIR TECHNOLOGIES INC Call PLTR 69608A908 $497.4M 0.27% 2,659,200 SH
49 ORACLE CORP Put ORCL 68389X955 $464.9M 0.25% 3,386,100 SH
50 TAIWAN SEMICONDUCTOR MANUFAC Call TSM 874039900 $461.7M 0.25% 1,012,000 SH
Filing History
Period Filed AUM Holdings Accession
2026-09-30 2026-11-04 $183.82B 10,469 0001488542-26-000013
2026-06-30 2026-08-12 $170.57B 10,492 0001488542-26-000011
2026-03-31 2026-05-14 $149.08B 10,161 0001488542-26-000009
2025-12-31 2026-02-11 $177.42B 9,381 0001488542-26-000002
2025-09-30 2025-11-12 $194.89B 10,359 0001488542-25-000018
Filer Information
Address
230 S. LASALLE STREET
SUITE 08-500
CHICAGO, IL 60604
Phone
(312) 360-2466
Filing Manager
SIMPLEX TRADING, LLC
CHICAGO, IL
Signatory
Dennis Kerlin
Chief Compliance Officer