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SIMPLEX TRADING, LLC — 13F Holdings & Portfolio

CIK 1488542 · latest 13F-HR filed 2026-08-12

Backtest portfolio

SIMPLEX TRADING, LLC manages $170.57B in 13F-reported U.S. long-equity assets across 10,492 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are XCNY (14.63%), XCNY (9.95%), QQQ (5.94%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 1,043 new positions, exited 923, added to 868, and trimmed 763.

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.

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
Loading holdings…
AUM

$170.57B

Long-equity book

Holdings

10,492

Distinct positions

Period

2026-06-30

Filed 2026-08-12

Q/Q Activity

+1043 / −923 / ↑868 / ↓763

vs 2026-03-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • ISHARES TR$157.3M +3907.3%
  • ISHARES TR$108.1M +205.1%
  • ISHARES TR$65.3M +170.8%
  • APPLE INC$65.0M +643.8%
  • TESLA INC$55.9M +744.8%
Show all 868 →

Top Trims

  • META PLATFORMS INC-$97.5M -74.2%
  • STATE STR SPDR S&P 500 ETF T-$91.9M -69.7%
  • SPDR GOLD TR-$71.1M -71.6%
  • AMAZON COM INC-$62.7M -39.4%
  • UNITEDHEALTH GROUP INC-$50.4M -64.8%
Show all 763 →

New Positions

  • MICRON TECHNOLOGY INC$60.8M
  • ROUNDHILL ETF TRUST$46.2M
  • DIREXION SHARES ETF TRUST$36.8M
  • COINBASE GLOBAL INC$18.9M
  • QUALCOMM INC$17.4M
Show all 1043 →

Exited Positions

  • VANECK ETF TRUST$35.9M
  • INTEL CORP$33.4M
  • SLB LIMITED$28.1M
  • ISHARES TR$22.7M
  • SELECT SECTOR SPDR TR$18.4M
Show all 923 →
All Holdings

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 XCNY 78462F953 $24.95B 14.63% 33,407,300 SH
2 STATE STR SPDR S&P 500 ETF T Call XCNY 78462F903 $16.97B 9.95% 22,725,000 SH
3 INVESCO QQQ TR Put QQQ 46090E953 $10.14B 5.94% 13,765,500 SH
4 INVESCO QQQ TR Call QQQ 46090E903 $8.03B 4.71% 10,904,800 SH
5 ISHARES TR Put IFXAF 464287957 $5.88B 3.45% 19,574,000 SH
6 MICRON TECHNOLOGY INC Put MU 595112953 $3.63B 2.13% 3,140,900 SH
7 NVIDIA CORPORATION Call NVDA 67066G904 $3.51B 2.06% 17,519,600 SH
8 NVIDIA CORPORATION Put NVDA 67066G954 $3.28B 1.92% 16,385,300 SH
9 TESLA INC Call TSLA 88160R901 $2.94B 1.73% 7,001,500 SH
10 TESLA INC Put TSLA 88160R951 $2.44B 1.43% 5,799,800 SH
11 APPLE INC Call AAPL 037833900 $2.36B 1.39% 8,168,800 SH
12 MICRON TECHNOLOGY INC Call MU 595112903 $2.20B 1.29% 1,906,800 SH
13 META PLATFORMS INC Call META 30303M902 $2.04B 1.20% 3,620,200 SH
14 SANDISK CORP Put — 80004C950 $1.97B 1.15% 864,500 SH
15 ADVANCED MICRO DEVICES INC Put AMD 007903957 $1.96B 1.15% 3,374,900 SH
16 MICROSOFT CORP Call MSFT 594918904 $1.74B 1.02% 4,655,800 SH
17 APPLE INC Put AAPL 037833950 $1.72B 1.01% 5,954,700 SH
18 ADVANCED MICRO DEVICES INC Call AMD 007903907 $1.71B 1.01% 2,951,000 SH
19 ALPHABET INC Call GGLAP 02079K905 $1.53B 0.90% 4,290,700 SH
20 VANECK ETF TRUST Put GENZ 92189F952 $1.50B 0.88% 2,287,300 SH
21 SPDR GOLD TR Call GLD 78463V907 $1.45B 0.85% 3,937,600 SH
22 ISHARES TR Call IFXAF 464287907 $1.32B 0.77% 15,268,900 SH
23 ISHARES TR Call IFXAF 464287907 $1.28B 0.75% 4,274,400 SH
24 AMAZON COM INC Call AMZN 023135906 $1.24B 0.73% 5,219,400 SH
25 META PLATFORMS INC Put META 30303M952 $1.17B 0.69% 2,084,500 SH
26 ALPHABET INC Put GGLAP 02079K955 $1.12B 0.66% 3,142,900 SH
27 ISHARES TR Put IFXAF 464287957 $1.07B 0.63% 12,345,600 SH
28 MICROSOFT CORP Put MSFT 594918954 $904.9M 0.53% 2,425,900 SH
29 ALPHABET INC Call GGLAP 02079K905 $835.8M 0.49% 2,365,400 SH
30 AMAZON COM INC Put AMZN 023135956 $830.9M 0.49% 3,486,200 SH
31 ALPHABET INC Put GGLAP 02079K955 $807.4M 0.47% 2,285,200 SH
32 STATE STR SPDR DOW JONES IND Call RWR 78467X909 $785.2M 0.46% 1,503,000 SH
33 BROADCOM INC Put AVGO 11135F951 $754.5M 0.44% 1,997,300 SH
34 INTEL CORP Put INTC 458140950 $744.9M 0.44% 5,334,900 SH
35 SPDR GOLD TR Put GLD 78463V957 $739.9M 0.43% 2,008,600 SH
36 INTEL CORP Call INTC 458140900 $724.0M 0.42% 5,185,300 SH
37 BROADCOM INC Call AVGO 11135F901 $695.5M 0.41% 1,841,100 SH
38 VANECK ETF TRUST Call GENZ 92189F902 $641.7M 0.38% 978,400 SH
39 TAIWAN SEMICONDUCTOR MANUFAC Put TSM 874039950 $630.4M 0.37% 1,320,000 SH
40 SANDISK CORP Call — 80004C900 $588.2M 0.34% 258,700 SH
41 ISHARES SILVER TR Call SLV 46428Q909 $583.7M 0.34% 10,916,100 SH
42 PALANTIR TECHNOLOGIES INC Put PLTR 69608A958 $547.4M 0.32% 4,692,000 SH
43 NETFLIX INC. Call NFLX 64110L906 $530.2M 0.31% 7,425,500 SH
44 UNITEDHEALTH GROUP INC Call UNH 91324P902 $508.4M 0.30% 1,223,100 SH
45 NETFLIX INC. Put NFLX 64110L956 $474.3M 0.28% 6,642,600 SH
46 PALANTIR TECHNOLOGIES INC Call PLTR 69608A908 $423.4M 0.25% 3,628,900 SH
47 ISHARES BITCOIN TRUST ETF Call IBIT 46438F901 $414.8M 0.24% 12,461,100 SH
48 UNITEDHEALTH GROUP INC Put — 91324P952 $405.7M 0.24% 976,200 SH
49 SPACE EXPLORATION TECHN CORP Call SPCX 84615Q903 $401.3M 0.24% 2,348,600 SH
50 MARVELL TECHNOLOGY INC Put MRVL 573874954 $395.1M 0.23% 1,326,300 SH
Filing History
Period Filed AUM Holdings Accession
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 $194.9M 10,359 0001488542-25-000018