Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 | +$31.4M | |
| 2 | +$28.5M | |
| 3 | +$23.4M | |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.7M |
| 5 |
JPMorgan Chase
JPM
|
+$18.1M |
Top Sells
| 1 | +$51.6M | |
| 2 | +$49.5M | |
| 3 | +$47.7M | |
| 4 |
Netflix
NFLX
|
+$35M |
| 5 |
NVIDIA
NVDA
|
+$32.4M |
Sector Composition
| 1 | Technology | 18.2% |
| 2 | Healthcare | 12.18% |
| 3 | Consumer Discretionary | 11.82% |
| 4 | Financials | 6.03% |
| 5 | Communication Services | 5.78% |