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 |
Invesco QQQ Trust
QQQ
|
$85.4M |
| 2 |
SPDR Gold Trust
GLD
|
$75.9M |
| 3 |
NVIDIA
NVDA
|
$42.6M |
| 4 |
Netflix
NFLX
|
$41.1M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
$40.5M |
Top Sells
| 1 |
Apple
AAPL
|
$65.7M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
$25.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$24.4M |
| 4 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$24.3M |
| 5 |
Broadcom
AVGO
|
$21.3M |
Sector Composition
| 1 | Technology | 15.2% |
| 2 | Consumer Discretionary | 14.52% |
| 3 | Communication Services | 10.57% |
| 4 | Healthcare | 8.15% |
| 5 | Financials | 7.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3726
State Street
STT
$32.1B
| – | – |
-6,639
| Closed | -$353K |
|
3727
Stereotaxis
STXS
$246M
| – | – |
0
| – | – |
|
|
SUP
3728
DELISTED
Superior Industries International
SUP
| – | – |
-833
| Closed | – |
|
|
SUPV
3729
Grupo Supervielle
SUPV
$657M
| – | – |
-328
| Closed | – |
|
3730
Whirlpool
WHR
$5B
| $0 | ﹤0.01% |
+2,600
| New | – |
|
3731
Wingstop
WING
$9.01B
| – | – |
0
| – | – |
|
3732
WIX.com
WIX
$8.05B
| – | – |
0
| – | – |
|
3733
World Kinect Corp
WKC
$1.52B
| – | – |
0
| – | – |
|
3734
Willdan Group
WLDN
$1.52B
| – | – |
-899
| Closed | -$19K |
|
3735
Westlake Corp
WLK
$10.9B
| – | – |
-12,178
| Closed | -$464K |
|