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 |
Boeing
BA
|
$49.5M |
| 2 |
Pinduoduo
PDD
|
$45.3M |
| 3 |
Microsoft
MSFT
|
$42.5M |
| 4 |
Apple
AAPL
|
$33.3M |
| 5 |
Direxion Daily Semiconductor Bull 3X Shares
SOXL
|
$25.4M |
Top Sells
| 1 |
Broadcom
AVGO
|
$95.4M |
| 2 |
Citigroup
C
|
$57.9M |
| 3 |
Pfizer
PFE
|
$55.9M |
| 4 |
TSMC
TSM
|
$40.4M |
| 5 |
Starbucks
SBUX
|
$40.4M |
Sector Composition
| 1 | Technology | 23.11% |
| 2 | Consumer Discretionary | 16.53% |
| 3 | Healthcare | 8.58% |
| 4 | Industrials | 7.58% |
| 5 | Financials | 7.29% |
