# SIMPLEX TRADING, LLC

> Institutional holdings reported to the SEC as of Q2 2026 on Form 13F. CIK 1488542. Source: https://holderbook.com/funds/1488542-simplex-trading-llc/

- Reported value: $170.6B
- Positions: 9,154
- Weight of the ten largest: 49.6%
- Filed: 2026-08-12

A 13F reports long US equity positions only. Short positions, bonds, foreign listings, private holdings and cash are not visible, so this is not the manager's whole book.

## Holdings

| Security | Ticker | Value | Shares | Weight | Quarters held |
|---|---|---|---|---|---|
| STATE STR SPDR S&P 500 ETF T | [SPY](https://holderbook.com/stocks/SPY/) | $24.9B | 0 | 14.6% | 31 |
| STATE STR SPDR S&P 500 ETF T | [SPY](https://holderbook.com/stocks/SPY/) | $17.0B | 0 | 9.9% | 31 |
| INVESCO QQQ TR | [QQQ](https://holderbook.com/stocks/QQQ/) | $10.1B | 0 | 5.9% | 21 |
| INVESCO QQQ TR | [QQQ](https://holderbook.com/stocks/QQQ/) | $8.0B | 0 | 4.7% | 21 |
| ISHARES TR | [IWM](https://holderbook.com/stocks/IWM/) | $7.8B | 0 | 4.5% | 31 |
| MICRON TECHNOLOGY INC | [MU](https://holderbook.com/stocks/MU/) | $3.6B | 0 | 2.1% | 22 |
| NVIDIA CORPORATION | [NVDA](https://holderbook.com/stocks/NVDA/) | $3.5B | 0 | 2.1% | 21 |
| ISHARES TR | [IWM](https://holderbook.com/stocks/IWM/) | $3.3B | 0 | 2.0% | 31 |
| NVIDIA CORPORATION | [NVDA](https://holderbook.com/stocks/NVDA/) | $3.3B | 0 | 1.9% | 21 |
| TESLA INC | [TSLA](https://holderbook.com/stocks/TSLA/) | $2.9B | 0 | 1.7% | 21 |
| TESLA INC | [TSLA](https://holderbook.com/stocks/TSLA/) | $2.4B | 0 | 1.4% | 21 |
| ALPHABET INC | [GOOG](https://holderbook.com/stocks/GOOG/) | $2.4B | 0 | 1.4% | 31 |
| APPLE INC | [AAPL](https://holderbook.com/stocks/AAPL/) | $2.4B | 0 | 1.4% | 31 |
| MICRON TECHNOLOGY INC | [MU](https://holderbook.com/stocks/MU/) | $2.2B | 0 | 1.3% | 22 |
| META PLATFORMS INC | [META](https://holderbook.com/stocks/META/) | $2.0B | 0 | 1.2% | 31 |
| SANDISK CORP | [SNDK](https://holderbook.com/stocks/SNDK/) | $2.0B | 0 | 1.2% | 6 |
| ADVANCED MICRO DEVICES INC | [AMD](https://holderbook.com/stocks/AMD/) | $2.0B | 0 | 1.1% | 31 |
| ALPHABET INC | [GOOG](https://holderbook.com/stocks/GOOG/) | $1.9B | 0 | 1.1% | 31 |
| MICROSOFT CORP | [MSFT](https://holderbook.com/stocks/MSFT/) | $1.7B | 0 | 1.0% | 31 |
| APPLE INC | [AAPL](https://holderbook.com/stocks/AAPL/) | $1.7B | 0 | 1.0% | 31 |
| ADVANCED MICRO DEVICES INC | [AMD](https://holderbook.com/stocks/AMD/) | $1.7B | 0 | 1.0% | 31 |
| VANECK ETF TRUST | [SMH](https://holderbook.com/stocks/SMH/) | $1.6B | 0 | 0.9% | 31 |
| SPDR GOLD TR | [GLD](https://holderbook.com/stocks/GLD/) | $1.5B | 0 | 0.9% | 31 |
| AMAZON COM INC | [AMZN](https://holderbook.com/stocks/AMZN/) | $1.2B | 0 | 0.7% | 31 |
| META PLATFORMS INC | [META](https://holderbook.com/stocks/META/) | $1.2B | 0 | 0.7% | 31 |
| SELECT SECTOR SPDR TR | [XLU](https://holderbook.com/stocks/XLU/) | $963.2M | 0 | 0.6% | 31 |
| MICROSOFT CORP | [MSFT](https://holderbook.com/stocks/MSFT/) | $904.9M | 0 | 0.5% | 31 |
| SELECT SECTOR SPDR TR | [XLU](https://holderbook.com/stocks/XLU/) | $883.0M | 0 | 0.5% | 31 |
| AMAZON COM INC | [AMZN](https://holderbook.com/stocks/AMZN/) | $830.9M | 0 | 0.5% | 31 |
| VANECK ETF TRUST | [SMH](https://holderbook.com/stocks/SMH/) | $804.7M | 0 | 0.5% | 31 |
| STATE STR SPDR DOW JONES IND | [DIA](https://holderbook.com/stocks/DIA/) | $785.2M | 0 | 0.5% | 31 |
| BROADCOM INC | [AVGO](https://holderbook.com/stocks/AVGO/) | $754.5M | 0 | 0.4% | 21 |
| INTEL CORP | [INTC](https://holderbook.com/stocks/INTC/) | $744.9M | 0 | 0.4% | 31 |
| SPDR GOLD TR | [GLD](https://holderbook.com/stocks/GLD/) | $739.9M | 0 | 0.4% | 31 |
| INTEL CORP | [INTC](https://holderbook.com/stocks/INTC/) | $724.0M | 0 | 0.4% | 31 |
| BROADCOM INC | [AVGO](https://holderbook.com/stocks/AVGO/) | $695.5M | 0 | 0.4% | 21 |
| TAIWAN SEMICONDUCTOR MANUFAC | [TSM](https://holderbook.com/stocks/TSM/) | $630.4M | 0 | 0.4% | 2 |
| SANDISK CORP | [SNDK](https://holderbook.com/stocks/SNDK/) | $588.2M | 0 | 0.3% | 6 |
| ISHARES SILVER TR | [SLV](https://holderbook.com/stocks/SLV/) | $583.7M | 0 | 0.3% | 21 |
| PALANTIR TECHNOLOGIES INC | [PLTR](https://holderbook.com/stocks/PLTR/) | $547.4M | 0 | 0.3% | 21 |
| NETFLIX INC | [NFLX](https://holderbook.com/stocks/NFLX/) | $530.2M | 0 | 0.3% | 31 |
| UNITEDHEALTH GROUP INC | [UNH](https://holderbook.com/stocks/UNH/) | $508.4M | 0 | 0.3% | 21 |
| NETFLIX INC | [NFLX](https://holderbook.com/stocks/NFLX/) | $474.3M | 0 | 0.3% | 31 |
| PALANTIR TECHNOLOGIES INC | [PLTR](https://holderbook.com/stocks/PLTR/) | $423.4M | 0 | 0.2% | 21 |
| ISHARES BITCOIN TRUST ETF | [IBIT](https://holderbook.com/stocks/IBIT/) | $414.8M | 0 | 0.2% | 7 |
| UNITEDHEALTH GROUP INC | [UNH](https://holderbook.com/stocks/UNH/) | $405.7M | 0 | 0.2% | 21 |
| SPACE EXPLORATION TECHN CORP | [SPCX](https://holderbook.com/stocks/SPCX/) | $401.3M | 0 | 0.2% | 1 |
| MARVELL TECHNOLOGY INC | [MRVL](https://holderbook.com/stocks/MRVL/) | $395.1M | 0 | 0.2% | 21 |
| ORACLE CORP | [ORCLPRD](https://holderbook.com/stocks/ORCLPRD/) | $383.8M | 0 | 0.2% | 31 |
| DIREXION SHARES ETF TRUST | [TNA](https://holderbook.com/stocks/TNA/) | $383.2M | 0 | 0.2% | 25 |
| ISHARES BITCOIN TRUST ETF | [IBIT](https://holderbook.com/stocks/IBIT/) | $382.7M | 0 | 0.2% | 7 |
| ORACLE CORP | [ORCLPRD](https://holderbook.com/stocks/ORCLPRD/) | $354.1M | 0 | 0.2% | 31 |
| NEBIUS GROUP N.V. | [NBIS](https://holderbook.com/stocks/NBIS/) | $339.6M | 0 | 0.2% | 7 |
| SPACE EXPLORATION TECHN CORP | [SPCX](https://holderbook.com/stocks/SPCX/) | $322.9M | 0 | 0.2% | 1 |
| SPDR SERIES TRUST | [XBI](https://holderbook.com/stocks/XBI/) | $315.4M | 0 | 0.2% | 31 |
| ISHARES SILVER TR | [SLV](https://holderbook.com/stocks/SLV/) | $309.5M | 0 | 0.2% | 21 |
| NVIDIA CORPORATION | [NVDA](https://holderbook.com/stocks/NVDA/) | $304.3M | 1,520,692 | 0.2% | 13 |
| ISHARES INC | [TUR](https://holderbook.com/stocks/TUR/) | $302.0M | 0 | 0.2% | 31 |
| ARM HOLDINGS PLC | [ARM](https://holderbook.com/stocks/ARM/) | $291.7M | 0 | 0.2% | 12 |
| STRATEGY INC | [STRF](https://holderbook.com/stocks/STRF/) | $281.7M | 0 | 0.2% | 23 |
| TAIWAN SEMICONDUCTOR MANUFAC | [TSM](https://holderbook.com/stocks/TSM/) | $280.5M | 0 | 0.2% | 2 |
| ISHARES INC | [TUR](https://holderbook.com/stocks/TUR/) | $277.6M | 0 | 0.2% | 31 |
| CROWDSTRIKE HLDGS INC | [CRWD](https://holderbook.com/stocks/CRWD/) | $254.9M | 0 | 0.1% | 29 |
| STATE STR SPDR DOW JONES IND | [DIA](https://holderbook.com/stocks/DIA/) | $245.7M | 0 | 0.1% | 31 |
| GOLDMAN SACHS GROUP INC | [GS](https://holderbook.com/stocks/GS/) | $243.6M | 0 | 0.1% | 31 |
| MARVELL TECHNOLOGY INC | [MRVL](https://holderbook.com/stocks/MRVL/) | $235.6M | 0 | 0.1% | 21 |
| CISCO SYS INC | [CSCO](https://holderbook.com/stocks/CSCO/) | $234.6M | 0 | 0.1% | 22 |
| UNITED STS OIL FD LP | [USO](https://holderbook.com/stocks/USO/) | $234.1M | 0 | 0.1% | 21 |
| APPLIED MATLS INC | [AMAT](https://holderbook.com/stocks/AMAT/) | $226.4M | 0 | 0.1% | 22 |
| SPDR SERIES TRUST | [XBI](https://holderbook.com/stocks/XBI/) | $226.3M | 0 | 0.1% | 31 |
| GOLDMAN SACHS GROUP INC | [GS](https://holderbook.com/stocks/GS/) | $223.8M | 0 | 0.1% | 31 |
| ROBINHOOD MKTS INC | [HOOD](https://holderbook.com/stocks/HOOD/) | $214.0M | 0 | 0.1% | 19 |
| ALIBABA GROUP HLDG LTD | [BABA](https://holderbook.com/stocks/BABA/) | $212.4M | 0 | 0.1% | 21 |
| JPMORGAN CHASE & CO | [JPM](https://holderbook.com/stocks/JPM/) | $211.1M | 0 | 0.1% | 8 |
| ASML HLDG NV | [ASML](https://holderbook.com/stocks/ASML/) | $210.7M | 0 | 0.1% | 31 |
| BLOOM ENERGY CORP | [BE](https://holderbook.com/stocks/BE/) | $206.3M | 0 | 0.1% | 31 |
| APPLIED MATLS INC | [AMAT](https://holderbook.com/stocks/AMAT/) | $205.5M | 0 | 0.1% | 22 |
| KRANESHARES TRUST | [KWEB](https://holderbook.com/stocks/KWEB/) | $202.8M | 0 | 0.1% | 20 |
| ALIBABA GROUP HLDG LTD | [BABA](https://holderbook.com/stocks/BABA/) | $202.7M | 0 | 0.1% | 21 |
| UNITED STS OIL FD LP | [USO](https://holderbook.com/stocks/USO/) | $199.5M | 0 | 0.1% | 21 |
| CARVANA CO | [CVNA](https://holderbook.com/stocks/CVNA/) | $196.7M | 0 | 0.1% | 21 |
| DELL TECHNOLOGIES INC | [DELL](https://holderbook.com/stocks/DELL/) | $191.4M | 0 | 0.1% | 31 |
| ISHARES TR | [HYG](https://holderbook.com/stocks/HYG/) | $191.0M | 0 | 0.1% | 31 |
| LAM RESEARCH CORP | [LRCX](https://holderbook.com/stocks/LRCX/) | $190.1M | 0 | 0.1% | 7 |
| PROSHARES TR | [TQQQ](https://holderbook.com/stocks/TQQQ/) | $188.2M | 0 | 0.1% | 31 |
| LUMENTUM HLDGS INC | [LITE](https://holderbook.com/stocks/LITE/) | $188.1M | 0 | 0.1% | 22 |
| CITIGROUP INC | [CPRR](https://holderbook.com/stocks/CPRR/) | $186.0M | 0 | 0.1% | 31 |
| CITIGROUP INC | [CPRR](https://holderbook.com/stocks/CPRR/) | $181.7M | 0 | 0.1% | 31 |
| SEAGATE TECHNOLOGY HLDNGS PL | [STX](https://holderbook.com/stocks/STX/) | $180.9M | 0 | 0.1% | 2 |
| ARM HOLDINGS PLC | [ARM](https://holderbook.com/stocks/ARM/) | $177.2M | 0 | 0.1% | 12 |
| PROSHARES TR | [TQQQ](https://holderbook.com/stocks/TQQQ/) | $173.5M | 0 | 0.1% | 31 |
| COINBASE GLOBAL INC | [COIN](https://holderbook.com/stocks/COIN/) | $171.2M | 0 | 0.1% | 21 |
| CISCO SYS INC | [CSCO](https://holderbook.com/stocks/CSCO/) | $163.8M | 0 | 0.1% | 22 |
| DIREXION SHARES ETF TRUST | [TNA](https://holderbook.com/stocks/TNA/) | $163.4M | 0 | 0.1% | 25 |
| CATERPILLAR INC | [CAT](https://holderbook.com/stocks/CAT/) | $162.8M | 0 | 0.1% | 31 |
| ISHARES TR | [IWM](https://holderbook.com/stocks/IWM/) | $161.3M | 536,810 | 0.1% | 2 |
| ISHARES TR | [TLT](https://holderbook.com/stocks/TLT/) | $160.8M | 1,860,997 | 0.1% | 2 |
| WESTERN DIGITAL CORP. | [WDC](https://holderbook.com/stocks/WDC/) | $160.1M | 0 | 0.1% | 31 |
| EXXON MOBIL CORP | [XOMXXXX](https://holderbook.com/stocks/XOMXXXX/) | $158.6M | 0 | 0.1% | 21 |
| ROBINHOOD MKTS INC | [HOOD](https://holderbook.com/stocks/HOOD/) | $158.4M | 0 | 0.1% | 19 |

## What the disclosed book did

Not the fund's return. This is the change in value of the positions disclosed on Form 13F, had they been left untouched, against SPY over the same quarter ends.

| Quarter | Book | Market | Difference | Priced |
|---|---|---|---|---|
| Q2 2026 | +19.2% | +14.8% | +4.4% | 100% |
| Q1 2026 | -1.3% | -4.6% | +3.4% | 99% |
| Q4 2025 | +0.4% | +2.4% | -1.9% | 100% |
| Q3 2025 | +17.5% | +7.8% | +9.7% | 100% |
| Q2 2025 | +14.9% | +10.5% | +4.5% | 100% |
| Q1 2025 | -3.6% | -4.6% | +0.9% | 100% |
| Q4 2024 | -1.3% | +2.1% | -3.5% | 100% |
| Q3 2024 | +5.5% | +5.4% | +0.1% | 100% |

## Quarter by quarter

| Quarter | Value | Positions |
|---|---|---|
| Q2 2026 | $170.6B | 9,154 |
| Q1 2026 | $149.1B | 8,925 |
| Q4 2025 | $177.4B | 8,342 |
| Q3 2025 | $194.9B | 8,922 |
| Q2 2025 | $174.6B | 8,476 |
| Q1 2025 | $156.2B | 8,363 |
| Q4 2024 | $178.6B | 8,365 |
| Q3 2024 | $170.4B | 8,334 |
| Q2 2024 | $161.9B | 8,630 |
| Q1 2024 | $173.1B | 8,700 |
| Q4 2023 | $156.4B | 8,645 |
| Q3 2023 | $127.1B | 8,505 |