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 |
Microsoft
MSFT
|
$101M |
| 2 |
NVIDIA
NVDA
|
$66M |
| 3 |
Citigroup
C
|
$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
$64M |
| 3 |
Meta Platforms (Facebook)
META
|
$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
$34.3M |
| 5 |
PayPal
PYPL
|
$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
