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 | +$286M | |
| 2 | +$82.3M | |
| 3 | +$72.6M | |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$64.2M |
| 5 |
Intel
INTC
|
+$52.9M |
Top Sells
| 1 | +$51.5M | |
| 2 | +$41.8M | |
| 3 | +$26.3M | |
| 4 |
United Airlines
UAL
|
+$22.7M |
| 5 |
Exxon Mobil
XOM
|
+$22.3M |
Sector Composition
| 1 | Technology | 25.99% |
| 2 | Communication Services | 9.81% |
| 3 | Consumer Discretionary | 9.8% |
| 4 | Financials | 8.7% |
| 5 | Healthcare | 6.24% |