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 | |
|---|---|---|---|---|---|---|
176
DexCom
DXCM
$31.6B
| $1.21M | 0.05% |
+65,160
| New | +$1.21M |
|
177
Monster Beverage
MNST
$61B
| $1.18M | 0.05% |
41,328
+15,906
| +63% | +$455K |
|
178
Mohawk Industries
MHK
$8.65B
| $1.18M | 0.05% |
+5,088
| New | +$1.18M |
|
179
Embraer
ERJ
$11.2B
| $1.18M | 0.05% |
45,223
+34,134
| +308% | +$887K |
|
180
CACI
CACI
$10.4B
| $1.17M | 0.05% |
7,706
+7,219
| +1,482% | +$1.09M |
|
181
NetEase
NTES
$85B
| $1.14M | 0.05% |
20,415
+13,385
| +190% | +$750K |
|
182
Amplify Cybersecurity ETF
HACK
$2.29B
| $1.14M | 0.05% |
33,324
+29,431
| +756% | +$1.01M |
|
183
Leidos
LDOS
$23B
| $1.14M | 0.05% |
17,466
+10,662
| +157% | +$697K |
|
184
ProShares Ultra S&P500
SSO
$7.2B
| $1.14M | 0.05% |
43,312
-72,760
| -63% | -$1.92M |
|
185
Oracle
ORCL
$654B
| $1.14M | 0.05% |
24,883
-25,334
| -50% | -$1.16M |
|
186
Cognizant
CTSH
$35.1B
| $1.12M | 0.05% |
13,897
+9,038
| +186% | +$727K |
|
187
Lincoln National
LNC
$7.98B
| $1.12M | 0.05% |
+15,292
| New | +$1.12M |
|
188
Burlington
BURL
$18.4B
| $1.1M | 0.05% |
+8,286
| New | +$1.1M |
|
189
Lamb Weston
LW
$8.08B
| $1.1M | 0.05% |
+18,828
| New | +$1.1M |
|
190
Goodyear
GT
$2.43B
| $1.1M | 0.05% |
41,228
+24,580
| +148% | +$653K |
|
191
BlackBerry
BB
$2.31B
| $1.09M | 0.05% |
95,125
+59,534
| +167% | +$684K |
|
|
HES
192
DELISTED
Hess
HES
| $1.09M | 0.05% |
21,545
-5,521
| -20% | -$279K |
|
193
Walt Disney
DIS
$212B
| $1.09M | 0.05% |
+10,843
| New | +$1.09M |
|
|
MNK
194
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $1.08M | 0.05% |
74,241
+43,763
| +144% | +$634K |
|
195
Ashland
ASH
$2.51B
| $1.07M | 0.05% |
15,322
+9,021
| +143% | +$629K |
|
|
IMMU
196
DELISTED
Immunomedics Inc
IMMU
| $1.05M | 0.05% |
+72,147
| New | +$1.05M |
|
197
Sherwin-Williams
SHW
$92.9B
| $1.05M | 0.05% |
+8,061
| New | +$1.05M |
|
198
Carter's
CRI
$1.05B
| $1.04M | 0.05% |
9,947
+9,636
| +3,098% | +$1M |
|
199
Vanguard Real Estate ETF
VNQ
$34.7B
| $1.04M | 0.05% |
+13,720
| New | +$1.04M |
|
200
Moody's
MCO
$89.5B
| $1.03M | 0.05% |
6,410
+4,458
| +228% | +$718K |
|