SIMPLEX TRADING, LLC
Long book
$3.23B
Q1 2026
Positions
2613
Top-10 weight
37%
concentration
Last quarter
+17.1%
SPY +14.8%
Turnover
58%
of book per quarter
Strategy in plain words
auto-generated from filingsSIMPLEX TRADING, LLC is a market maker — positions are inventory, not bets, running a $3.23B US long book across 2613 positions.
The portfolio is moderately concentrated (top 10 ≈ 37% of the book). Turnover is high — positions rotate quickly, so individual names matter less than the process. Current anchor positions: NVIDIA CORP, AMAZON.COM INC, SS SPDR S&P 500 ETF TRUST-US, META PLATFORMS INC-CLASS A, TAIWAN SEMICONDUCTOR-SP ADR.
Over the last 9 quarters its long book ran on average 1pp per quarter ahead of the S&P 500, beating the index in 5 of 9 quarters. Its holdings are mechanical (indexing / client flows), so position changes carry no stock-picking signal.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
-0.9%
Q2 2024
+5.4%
Q3 2024
-0.8%
Q4 2024
-3.6%
Q1 2025
+14.9%
Q2 2025
+17.6%
Q3 2025
+0.7%
Q4 2025
-0.9%
Q1 2026
+17.1%
Sector allocation
Technology 45%
Financials 10%
Consumer discretionary 9%
Industrials 9%
Healthcare 7%
Materials 5%
Other 4%
Energy 3%
Long book by quarter
What does SIMPLEX TRADING, own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| NVDA NVIDIA CORP | Technology | 1.5M | $263.2M | 8.1% | +103.7% |
| AMZN AMAZON.COM INC | Consumer discretionary | 764.9K | $159.3M | 4.9% | New |
| META META PLATFORMS INC-CLASS A | Technology | 229.9K | $131.5M | 4.1% | +266.8% |
| GOOGL ALPHABET INC-CL A | Technology | 296.3K | $85.2M | 2.6% | +664.3% |
| UNH UNITEDHEALTH GROUP INC | Financials | 287.6K | $77.8M | 2.4% | +210.1% |
| ORCL ORACLE CORP | Technology | 514.7K | $75.7M | 2.3% | +291.7% |
| AMD ADVANCED MICRO DEVICES | Technology | 260.6K | $53.0M | 1.6% | +361.5% |
| MSFT MICROSOFT CORP | Technology | 136.7K | $50.6M | 1.6% | +93.6% |
| GOOG ALPHABET INC-CL C | Technology | 145.4K | $41.7M | 1.3% | +199.7% |
| LITE LUMENTUM HOLDINGS INC | Technology | 52.8K | $37.1M | 1.1% | +198.0% |
| PFE PFIZER INC | Healthcare | 1.3M | $35.6M | 1.1% | -15.0% |
| PLTR PALANTIR TECHNOLOGIES INC-A | Technology | 231.3K | $33.8M | 1.0% | +20.9% |
| INTC INTEL CORP | Technology | 757.7K | $33.4M | 1.0% | -30.0% |
| SLB SLB LTD | Energy | 547.1K | $28.1M | 0.9% | +14.2% |
| CI THE CIGNA GROUP | Financials | 98.2K | $26.2M | 0.8% | -29.9% |
| ASML ASML HOLDING NV-NY REG SHS | Industrials | 16.7K | $22.1M | 0.7% | New |
| NKE NIKE INC -CL B | Other | 398.2K | $21.0M | 0.7% | +42.6% |
| DOW DOW INC | Materials | 459.3K | $19.0M | 0.6% | +54.5% |
| PEP PEPSICO INC | Consumer staples | 121.6K | $18.9M | 0.6% | New |
| NFLX NETFLIX INC | Services media | 184.9K | $17.8M | 0.6% | -73.2% |
| SOFI SOFI TECHNOLOGIES INC | Financials | 968.4K | $15.4M | 0.5% | -46.4% |
| GEV GE VERNOVA INC | Industrials | 16.9K | $14.8M | 0.5% | +57.8% |
| FCX FREEPORT-MCMORAN INC | Materials | 244.8K | $14.4M | 0.4% | -56.8% |
| BKNG BOOKING HOLDINGS INC | Industrials | 3.3K | $14.1M | 0.4% | -35.1% |
| CHTR CHARTER COMMUNICATIONS INC-A | Communications | 62.6K | $13.5M | 0.4% | New |
| AVGO BROADCOM INC | Technology | 43.2K | $13.4M | 0.4% | -81.4% |
| UNP UNION PACIFIC CORP | Industrials | 54.0K | $13.1M | 0.4% | +2483.9% |
| B BARRICK MINING CORP | Materials | 297.9K | $12.2M | 0.4% | +16.3% |
| MS MORGAN STANLEY | Financials | 73.1K | $12.0M | 0.4% | +8.7% |
| MRNA MODERNA INC | Healthcare | 219.6K | $11.2M | 0.3% | +144.9% |
| NOW SERVICENOW INC | Technology | 96.6K | $10.1M | 0.3% | +123.8% |
| AAPL APPLE INC | Technology | 39.8K | $10.1M | 0.3% | -94.4% |
| ALAB ASTERA LABS INC | Technology | 91.9K | $10.1M | 0.3% | New |
| AXTI AXT INC | Technology | 173.6K | $9.9M | 0.3% | +97.9% |
| ESLT ELBIT SYSTEMS LTD | Industrials | 11.0K | $9.4M | 0.3% | +1246.6% |
| ZTS ZOETIS INC | Healthcare | 74.7K | $8.8M | 0.3% | +8.9% |
| SNAP SNAP INC - A | Technology | 1.7M | $7.9M | 0.2% | +12.8% |
| ET ENERGY TRANSFER LP | Utilities | 394.2K | $7.6M | 0.2% | -46.2% |
| TSLA TESLA INC | Industrials | 20.2K | $7.5M | 0.2% | -83.2% |
| CP CANADIAN PACIFIC KANSAS CITY | Industrials | 92.0K | $7.2M | 0.2% | New |
| IREN IREN LTD | Financials | 207.8K | $7.1M | 0.2% | +8.3% |
| ADI ANALOG DEVICES INC | Technology | 22.0K | $7.0M | 0.2% | +568.0% |
| CAMT CAMTEK LTD | Other | 43.2K | $6.6M | 0.2% | New |
| APGE APOGEE THERAPEUTICS INC | Healthcare | 77.8K | $6.5M | 0.2% | +23.9% |
| DAL DELTA AIR LINES INC | Industrials | 98.3K | $6.5M | 0.2% | New |
| OSCR OSCAR HEALTH INC - CLASS A | Financials | 565.2K | $6.5M | 0.2% | -11.6% |
| GLW CORNING INC | Industrials | 47.4K | $6.4M | 0.2% | +45.4% |
| CCJ CAMECO CORP | Materials | 55.9K | $6.1M | 0.2% | +16.1% |
| OKTA OKTA INC | Technology | 76.8K | $6.0M | 0.2% | +162.6% |
| PEN PENUMBRA INC | Healthcare | 17.7K | $5.8M | 0.2% | +13530.0% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 14, 2026 | 10161 | $149.08B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 11, 2026 | 9381 | $177.42B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 12, 2025 | 10359 | $194.89B | $K fixed canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 5, 2025 | 9904 | $174.65B | $K fixed canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 12, 2025 | 9739 | $156.19B | $K fixed canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 11, 2025 | 9701 | $178.63B | $K fixed canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 8, 2024 | 9647 | $170.39B | $K fixed canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Jul 25, 2024 | 9955 | $161.88B | $K fixed canonical | SEC ↗ |
| Q1 2024 | 13F-HR | Apr 25, 2024 | 10037 | $173.12B | $K fixed canonical | SEC ↗ |