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 | |
|---|---|---|---|---|---|---|
|
CLDR
151
DELISTED
Cloudera, Inc.
CLDR
| $1.34M | 0.06% |
62,177
+38,344
| +161% | +$827K |
|
152
TechnipFMC
FTI
$16.3B
| $1.33M | 0.06% |
60,733
+7,171
| +13% | +$157K |
|
153
Agios Pharmaceuticals
AGIO
$2.1B
| $1.33M | 0.06% |
16,234
+9,240
| +132% | +$755K |
|
|
NBIS
154
Nebius Group N.V. Class A Ordinary Shares
NBIS
$15.5B
| $1.32M | 0.06% |
33,441
+7,837
| +31% | +$309K |
|
|
CXO
155
DELISTED
CONCHO RESOURCES INC.
CXO
| $1.32M | 0.06% |
+8,772
| New | +$1.32M |
|
156
ProShares Ultra Bloomberg Crude Oil
UCO
$369M
| $1.31M | 0.06% |
+7,650
| New | +$1.31M |
|
157
Ciena
CIEN
$16.5B
| $1.31M | 0.06% |
50,693
-2,450
| -5% | -$63.4K |
|
158
SPDR Bloomberg High Yield Bond ETF
JNK
$8.09B
| $1.31M | 0.06% |
12,172
+8,182
| +205% | +$880K |
|
159
Materials Select Sector SPDR Fund
XLB
$5.48B
| $1.31M | 0.06% |
+22,925
| New | +$1.31M |
|
160
Banco Macro
BMA
$3.72B
| $1.3M | 0.06% |
12,046
+11,834
| +5,582% | +$1.28M |
|
161
Charles River Laboratories
CRL
$7.99B
| $1.3M | 0.06% |
12,178
+7,028
| +136% | +$750K |
|
162
Teleflex
TFX
$5.7B
| $1.29M | 0.06% |
5,075
+5,072
| +169,067% | +$1.29M |
|
163
Rio Tinto
RIO
$101B
| $1.29M | 0.06% |
25,011
+8,699
| +53% | +$448K |
|
164
Sarepta Therapeutics
SRPT
$1.93B
| $1.29M | 0.06% |
17,379
-820
| -5% | -$60.7K |
|
|
EVHC
165
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $1.28M | 0.06% |
33,229
+3,097
| +10% | +$119K |
|
166
VanEck Oil Services ETF
OIH
$890M
| $1.28M | 0.06% |
2,672
+2,143
| +405% | +$1.02M |
|
|
USCR
167
DELISTED
U S Concrete, Inc.
USCR
| $1.27M | 0.06% |
+21,035
| New | +$1.27M |
|
168
DaVita
DVA
$9.69B
| $1.27M | 0.06% |
19,258
+6,393
| +50% | +$421K |
|
169
Teck Resources
TECK
$16B
| $1.26M | 0.06% |
+49,041
| New | +$1.26M |
|
170
APA Corp
APA
$8.39B
| $1.26M | 0.06% |
32,763
+24,089
| +278% | +$926K |
|
|
MDP
171
DELISTED
Meredith Corporation
MDP
| $1.25M | 0.05% |
23,163
+14,484
| +167% | +$779K |
|
172
Clorox
CLX
$15.2B
| $1.24M | 0.05% |
+9,289
| New | +$1.24M |
|
173
FibroGen
FGEN
$45.7M
| $1.23M | 0.05% |
1,065
+579
| +119% | +$668K |
|
174
Transocean
RIG
$2.92B
| $1.22M | 0.05% |
122,843
+89,910
| +273% | +$890K |
|
175
TripAdvisor
TRIP
$2.09B
| $1.21M | 0.05% |
29,588
+10,224
| +53% | +$418K |
|