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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
AAT
1776
American Assets Trust
AAT
$1.27B
| $2K | ﹤0.01% |
89
-77
| -46% | -$1.73K |
|
1777
Allot
ALLT
$426M
| $2K | ﹤0.01% |
466
-11,363
| -96% | -$48.8K |
|
1778
American Woodmark
AMWD
$995M
| $2K | ﹤0.01% |
+28
| New | +$2K |
|
1779
Digital Turbine
APPS
$501M
| $2K | ﹤0.01% |
+1,081
| New | +$2K |
|
1780
A10 Networks
ATEN
$1.29B
| $2K | ﹤0.01% |
398
-4,002
| -91% | -$20.1K |
|
1781
ATI
ATI
$10.5B
| $2K | ﹤0.01% |
106
-13,560
| -99% | -$256K |
|
1782
AtriCure
ATRC
$1.74B
| $2K | ﹤0.01% |
110
-2,061
| -95% | -$37.5K |
|
1783
Clarus
CLAR
$147M
| $2K | ﹤0.01% |
357
+251
| +237% | +$1.41K |
|
1784
CytomX Therapeutics
CTMX
$330M
| $2K | ﹤0.01% |
+89
| New | +$2K |
|
1785
Direxion Daily CSI China Internet Index Bull 2X Shares
CWEB
$363M
| $2K | ﹤0.01% |
+4
| New | +$2K |
|
1786
Invesco DB Oil Fund
DBO
$228M
| $2K | ﹤0.01% |
268
-182
| -40% | -$1.36K |
|
1787
ProShares Short Dow30
DOG
$122M
| $2K | ﹤0.01% |
35
-278
| -89% | -$15.9K |
|
1788
Diana Shipping
DSX
$225M
| $2K | ﹤0.01% |
1,098
-7,955
| -88% | -$14.5K |
|
1789
Eldorado Gold
EGO
$5.7B
| $2K | ﹤0.01% |
674
-2,180
| -76% | -$6.47K |
|
1790
EyePoint Pharmaceuticals
EYPT
$920M
| $2K | ﹤0.01% |
195
-161
| -45% | -$1.65K |
|
1791
First Financial Bancorp
FFBC
$2.46B
| $2K | ﹤0.01% |
+77
| New | +$2K |
|
1792
HNI Corp
HNI
$2.07B
| $2K | ﹤0.01% |
73
-139
| -66% | -$3.81K |
|
1793
iShares North American Natural Resources ETF
IGE
$621M
| $2K | ﹤0.01% |
+61
| New | +$2K |
|
1794
Identive
INVE
$85.9M
| $2K | ﹤0.01% |
+551
| New | +$2K |
|
1795
Independence Realty Trust
IRT
$4.07B
| $2K | ﹤0.01% |
+295
| New | +$2K |
|
1796
John B. Sanfilippo & Son
JBSS
$737M
| $2K | ﹤0.01% |
45
| – | – |
|
1797
SPDR S&P Insurance ETF
KIE
$829M
| $2K | ﹤0.01% |
80
-635
| -89% | -$15.9K |
|
1798
Marchex
MCHX
$86.4M
| $2K | ﹤0.01% |
+791
| New | +$2K |
|
1799
Pearson
PSO
$9.15B
| $2K | ﹤0.01% |
217
-494
| -69% | -$4.55K |
|
1800
Stellus Capital Investment Corp
SCM
$402M
| $2K | ﹤0.01% |
235
-270
| -53% | -$2.3K |
|