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 | +$102M | |
| 2 | +$27.8M | |
| 3 | +$22.4M | |
| 4 |
Boeing
BA
|
+$19.4M |
| 5 |
Exxon Mobil
XOM
|
+$14.7M |
Top Sells
| 1 | +$95.5M | |
| 2 | +$79.6M | |
| 3 | +$75.3M | |
| 4 |
NVIDIA
NVDA
|
+$51.6M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Sector Composition
| 1 | Consumer Discretionary | 21.63% |
| 2 | Technology | 16.44% |
| 3 | Healthcare | 9.05% |
| 4 | Financials | 8.41% |
| 5 | Communication Services | 7.51% |