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 |
Advanced Micro Devices
AMD
|
+$17.7M |
| 2 |
iShares MSCI EAFE ETF
EFA
|
+$10.1M |
| 3 |
NIO
NIO
|
+$7.66M |
| 4 |
Alibaba
BABA
|
+$7.54M |
| 5 |
Micron Technology
MU
|
+$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$101M |
| 2 |
SPDR Gold Trust
GLD
|
+$15.2M |
| 3 |
Amazon
AMZN
|
+$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
+$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
+$7.41M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
MCF
1026
DELISTED
Contango Oil & Gas Co.
MCF
| $342K | ﹤0.01% |
76,714
| – | – |
|
1027
Matador Resources
MTDR
$6.16B
| $340K | ﹤0.01% |
9,271
| – | – |
|
|
AKTS
1028
DELISTED
AKOUSTIS TECHNOLOGIES, INC.
AKTS
| $339K | ﹤0.01% |
31,432
+107
| +0.3% | +$1.15K |
|
|
WRK
1029
DELISTED
WestRock Company
WRK
| $339K | ﹤0.01% |
6,357
+52
| +0.8% | +$2.77K |
|
1030
Grocery Outlet
GO
$1.72B
| $338K | ﹤0.01% |
9,881
+1,397
| +16% | +$47.8K |
|
1031
M&T Bank
MTB
$31B
| $338K | ﹤0.01% |
2,297
| – | – |
|
1032
Occidental Petroleum
OXY
$45.6B
| $337K | ﹤0.01% |
10,266
-110,466
| -91% | -$3.63M |
|
1033
Trinseo
TSE
$81.6M
| $337K | ﹤0.01% |
5,756
+355
| +7% | +$20.8K |
|
1034
Taylor Morrison
TMHC
$6.89B
| $336K | ﹤0.01% |
12,440
-101
| -0.8% | -$2.73K |
|
1035
Aaon
AAON
$6.93B
| $335K | ﹤0.01% |
8,045
-4,200
| -34% | -$175K |
|
1036
Crane NXT
CXT
$3.49B
| $335K | ﹤0.01% |
10,379
-3
| -0% | -$97 |
|
1037
EyePoint Pharmaceuticals
EYPT
$934M
| $335K | ﹤0.01% |
37,477
| – | – |
|
|
DMTK
1038
DELISTED
DermTech, Inc. Common Stock
DMTK
| $335K | ﹤0.01% |
8,666
+1,949
| +29% | +$75.3K |
|
|
SEAH
1039
DELISTED
Sports Entertainment Acquisition Corp.
SEAH
| $335K | ﹤0.01% |
33,352
| – | – |
|
1040
Donaldson
DCI
$9.34B
| $334K | ﹤0.01% |
5,228
+2
| +0% | +$128 |
|
1041
Trex
TREX
$6.43B
| $334K | ﹤0.01% |
3,300
| – | – |
|
1042
Vanguard Value ETF
VTV
$144B
| $332K | ﹤0.01% |
2,406
| – | – |
|
1043
Arthur J. Gallagher & Co
AJG
$75.2B
| $331K | ﹤0.01% |
2,359
| – | – |
|
1044
Jones Lang LaSalle
JLL
$14.6B
| $331K | ﹤0.01% |
1,666
| – | – |
|
1045
PAR Technology
PAR
$1.85B
| $331K | ﹤0.01% |
4,955
| – | – |
|
1046
Bally's
BALY
$487M
| $330K | ﹤0.01% |
6,134
| – | – |
|
1047
Barnes & Noble Education
BNED
$288M
| $330K | ﹤0.01% |
453
-3
| -0.7% | -$2.19K |
|
1048
Idexx Laboratories
IDXX
$51B
| $330K | ﹤0.01% |
518
| – | – |
|
|
HA
1049
DELISTED
Hawaiian Holdings, Inc.
HA
| $330K | ﹤0.01% |
13,260
+664
| +5% | +$16.5K |
|
1050
Range Resources
RRC
$8.3B
| $329K | ﹤0.01% |
19,571
+2,753
| +16% | +$46.3K |
|