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 |
SPDR S&P 500 ETF Trust
SPY
|
$50.9M |
| 2 |
Citigroup
C
|
$25.9M |
| 3 |
Apple
AAPL
|
$25.1M |
| 4 |
Amazon
AMZN
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.3M |
Top Sells
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
$17.4M |
| 2 |
Wells Fargo
WFC
|
$11.9M |
| 3 |
Goldman Sachs
GS
|
$9.91M |
| 4 |
MDVN
MEDIVATION, INC.
MDVN
|
$8.62M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
$8.15M |
Sector Composition
| 1 | Communication Services | 15.08% |
| 2 | Technology | 12.4% |
| 3 | Healthcare | 11.9% |
| 4 | Consumer Discretionary | 11.24% |
| 5 | Financials | 9.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3551
Arista Networks
ANET
$173B
| – | – |
0
| – | – |
|
3552
Abercrombie & Fitch
ANF
$4.35B
| – | – |
-20,478
| Closed | -$325K |
|
3553
Anika Therapeutics
ANIK
$130M
| – | – |
-1,267
| Closed | -$60K |
|
3554
AngioDynamics
ANGO
$432M
| – | – |
0
| – | – |
|
3555
Hexcel
HXL
$5.08B
| – | – |
0
| – | – |
|
3556
VanEck High Yield Muni ETF
HYD
$3.29B
| – | – |
-100
| Closed | -$3K |
|
|
3557
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.7B
| – | – |
-93,358
| Closed | -$8.15M |
|
3558
Investcorp Credit Management BDC
ICMB
$42M
| – | – |
-52
| Closed | – |
|