Top Institutional Investors

SIMPLEX TRADING, LLC — 13F Holdings & Portfolio

CIK 1488542 · latest 13F-HR filed 2026-05-14

Backtest portfolio

SIMPLEX TRADING, LLC manages $149.08B in 13F-reported U.S. long-equity assets across 10,161 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are XCNY (18.39%), XCNY (9.44%), QQQ (4.36%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 1,128 new positions, exited 964, added to 609, and trimmed 833.

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.

Loading holdings…
AUM

$149.08B

Long-equity book

Holdings

10,161

Distinct positions

Period

2026-03-31

Filed 2026-05-14

Q/Q Activity

+1128 / −964 / ↑609 / ↓833

vs 2025-12-31

Firm Profile & Key People
Name Title / Status Ownership Type

Top Adds (vs prior quarter)

  • NVIDIA CORPORATION$125.0M +90.5%
  • META PLATFORMS INC$90.1M +217.9%
  • ALPHABET INC$73.1M +602.2%
  • STATE STR SPDR S&P 500 ETF T$72.2M +121.0%
  • ORACLE CORP$50.1M +195.6%
Show all 609 →

Top Trims

  • APPLE INC-$182.6M -94.8%
  • BROADCOM INC-$67.0M -83.3%
  • WESTERN DIGITAL CORP-$57.3M -97.3%
  • NETFLIX INC.-$47.0M -72.6%
  • TESLA INC-$46.5M -86.1%
Show all 833 →

New Positions

  • AMAZON COM INC$159.3M
  • TAIWAN SEMICONDUCTOR MANUFAC$118.9M
  • SPDR GOLD TR$99.2M
  • ISHARES TR$52.7M
  • UNITED STS OIL FD LP$42.0M
Show all 1128 →

Exited Positions

  • DIREXION SHS ETF TR$52.0M
  • BLOOM ENERGY CORP$26.2M
  • VERTIV HOLDINGS CO$24.6M
  • NEXTERA ENERGY INC$23.6M
  • WARNER BROS DISCOVERY INC$20.4M
Show all 964 →
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 $27.41B 18.39% 42,147,900 SH
2 STATE STR SPDR S&P 500 ETF T Call XCNY 78462F903 $14.08B 9.44% 21,650,100 SH
3 INVESCO QQQ TR Put QQQ 46090E953 $6.49B 4.36% 11,252,400 SH
4 INVESCO QQQ TR Call QQQ 46090E903 $5.99B 4.02% 10,378,200 SH
5 ISHARES TR Put IFXAF 464287957 $3.57B 2.39% 14,392,200 SH
6 TESLA INC Call TSLA 88160R901 $3.42B 2.29% 9,196,400 SH
7 NVIDIA CORPORATION Put NVDA 67066G954 $3.35B 2.25% 19,209,500 SH
8 NVIDIA CORPORATION Call NVDA 67066G904 $3.33B 2.23% 19,080,700 SH
9 TESLA INC Put TSLA 88160R951 $3.09B 2.07% 8,312,400 SH
10 SPDR GOLD TR Call GLD 78463V907 $2.36B 1.58% 5,490,500 SH
11 META PLATFORMS INC Call META 30303M902 $2.35B 1.58% 4,109,700 SH
12 APPLE INC Call AAPL 037833900 $2.22B 1.49% 8,760,100 SH
13 ISHARES TR Call IFXAF 464287907 $1.80B 1.20% 7,240,300 SH
14 SPDR GOLD TR Put GLD 78463V957 $1.65B 1.11% 3,830,900 SH
15 MICROSOFT CORP Call MSFT 594918904 $1.55B 1.04% 4,178,400 SH
16 APPLE INC Put AAPL 037833950 $1.53B 1.03% 6,022,900 SH
17 AMAZON COM INC Call AMZN 023135906 $1.46B 0.98% 7,000,500 SH
18 META PLATFORMS INC Put META 30303M952 $1.43B 0.96% 2,501,500 SH
19 ISHARES SILVER TR Call SLV 46428Q909 $1.36B 0.91% 19,990,100 SH
20 ISHARES TR Call IFXAF 464287907 $1.25B 0.84% 14,437,700 SH
21 ALPHABET INC Call GOOGL 02079K905 $1.15B 0.77% 4,004,900 SH
22 ALPHABET INC Call GOOGL 02079K905 $915.7M 0.61% 3,192,300 SH
23 AMAZON COM INC Put AMZN 023135956 $914.0M 0.61% 4,388,700 SH
24 ALPHABET INC Put GOOGL 02079K955 $905.3M 0.61% 3,148,200 SH
25 MICROSOFT CORP Put MSFT 594918954 $875.9M 0.59% 2,366,200 SH
26 ISHARES TR Put IFXAF 464287957 $769.0M 0.52% 8,870,900 SH
27 NETFLIX INC. Put NFLX 64110L956 $727.7M 0.49% 7,568,800 SH
28 ISHARES SILVER TR Put IFXAF 46428Q959 $717.9M 0.48% 10,536,200 SH
29 MICRON TECHNOLOGY INC Put MU 595112953 $715.2M 0.48% 2,117,000 SH
30 NETFLIX INC. Call NFLX 64110L906 $712.8M 0.48% 7,413,400 SH
31 PALANTIR TECHNOLOGIES INC Put PLTR 69608A958 $709.6M 0.48% 4,851,200 SH
32 ADVANCED MICRO DEVICES INC Put AMD 007903957 $708.1M 0.47% 3,480,900 SH
33 MICRON TECHNOLOGY INC Call MU 595112903 $685.1M 0.46% 2,027,800 SH
34 VANECK ETF TRUST Put GENZ 92189F952 $682.3M 0.46% 1,779,500 SH
35 STATE STR SPDR DOW JONES IND Call DIA 78467X909 $680.0M 0.46% 1,468,000 SH
36 BROADCOM INC Put AVGO 11135F951 $649.1M 0.44% 2,097,100 SH
37 ADVANCED MICRO DEVICES INC Call AMD 007903907 $599.6M 0.40% 2,947,600 SH
38 PALANTIR TECHNOLOGIES INC Call PLTR 69608A908 $583.0M 0.39% 3,985,500 SH
39 ALPHABET INC Put GOOGL 02079K955 $546.4M 0.37% 1,904,900 SH
40 BROADCOM INC Call AVGO 11135F901 $519.8M 0.35% 1,679,500 SH
41 UNITEDHEALTH GROUP INC Call UNH 91324P902 $519.3M 0.35% 1,919,000 SH
42 STRATEGY INC Put MHIFF 594972958 $515.2M 0.35% 4,128,200 SH
43 ISHARES BITCOIN TRUST ETF Call IBIT 46438F901 $505.6M 0.34% 13,159,700 SH
44 TAIWAN SEMICONDUCTOR MANUFAC Put TSM 874039950 $498.5M 0.33% 1,475,000 SH
45 ISHARES TR Put IFXAF 464288955 $473.8M 0.32% 5,954,900 SH
46 UNITED STS OIL FD LP Put USO 91232N957 $417.3M 0.28% 3,279,200 SH
47 ORACLE CORP Put ORCL 68389X955 $383.2M 0.26% 2,604,900 SH
48 ISHARES BITCOIN TRUST ETF Put IBIT 46438F951 $381.5M 0.26% 9,930,300 SH
49 SELECT SECTOR SPDR TR Put XLU 81369Y956 $367.4M 0.25% 5,996,700 SH
50 ORACLE CORP Call ORCL 68389X905 $352.0M 0.24% 2,392,600 SH
Filing History
Period Filed AUM Holdings Accession
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