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 |
Gilead Sciences
GILD
|
$16.8M |
| 2 |
Apple
AAPL
|
$16.2M |
| 3 |
Booking.com
BKNG
|
$15.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$15.3M |
| 5 |
Wells Fargo
WFC
|
$11.9M |
Top Sells
| 1 |
SPDR Gold Trust
GLD
|
$38M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
$11.5M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
$10.5M |
Sector Composition
| 1 | Communication Services | 15.83% |
| 2 | Healthcare | 15.63% |
| 3 | Consumer Discretionary | 12.92% |
| 4 | Technology | 11.44% |
| 5 | Financials | 8.29% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
ProShares Ultra S&P500
SSO
$7.13B
| $1.63M | 0.11% |
+22,918
| New | +$1.63M |
|
102
Expedia Group
EXPE
$26.3B
| $1.61M | 0.11% |
+13,825
| New | +$1.61M |
|
103
NextEra Energy, Inc.
NEE
$148B
| $1.58M | 0.11% |
12,956
+1,240
| +11% | +$152K |
|
|
PX
104
DELISTED
Praxair Inc
PX
| $1.58M | 0.11% |
13,077
+3,771
| +41% | +$456K |
|
|
ITCI
105
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $1.58M | 0.11% |
+103,463
| New | +$1.58M |
|
106
Regeneron Pharmaceuticals
REGN
$59.8B
| $1.56M | 0.11% |
3,881
-983
| -20% | -$395K |
|
|
WP
107
DELISTED
Worldpay, Inc.
WP
| $1.56M | 0.11% |
27,699
+27,258
| +6,181% | +$1.53M |
|
|
108
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$304M
| $1.54M | 0.1% |
48,855
-331,887
| -87% | -$10.5M |
|
|
MDCO
109
DELISTED
Medicines Co
MDCO
| $1.5M | 0.1% |
39,737
+31,245
| +368% | +$1.18M |
|
|
LXK
110
DELISTED
Lexmark Intl Inc
LXK
| $1.5M | 0.1% |
37,536
-2,688
| -7% | -$107K |
|
111
J.M. Smucker
SJM
$12B
| $1.49M | 0.1% |
10,966
+8,326
| +315% | +$1.13M |
|
112
Agios Pharmaceuticals
AGIO
$2.36B
| $1.47M | 0.1% |
27,905
+15,604
| +127% | +$824K |
|
113
RTX Corp
RTX
$212B
| $1.47M | 0.1% |
+14,501
| New | +$1.47M |
|
|
SHPG
114
DELISTED
Shire pic
SHPG
| $1.47M | 0.1% |
7,601
-12,688
| -63% | -$2.46M |
|
115
Comerica
CMA
$9B
| $1.46M | 0.1% |
30,818
+21,003
| +214% | +$994K |
|
|
EGN
116
DELISTED
Energen
EGN
| $1.46M | 0.1% |
25,240
+6,676
| +36% | +$385K |
|
117
United Airlines
UAL
$34.4B
| $1.43M | 0.1% |
27,188
-36,925
| -58% | -$1.94M |
|
|
DISH
118
DELISTED
DISH Network Corp.
DISH
| $1.39M | 0.09% |
25,423
+17,848
| +236% | +$977K |
|
119
Vanguard FTSE Emerging Markets ETF
VWO
$96.5B
| $1.39M | 0.09% |
36,835
+36,444
| +9,321% | +$1.37M |
|
120
Assertio
ASRT
$78M
| $1.38M | 0.09% |
+55,288
| New | +$1.38M |
|
121
ProShares UltraShort Yen
YCS
$33.1M
| $1.33M | 0.09% |
21,902
+18,968
| +646% | +$1.15M |
|
|
WWAV
122
DELISTED
The WhiteWave Foods Company
WWAV
| $1.33M | 0.09% |
24,370
-28,942
| -54% | -$1.57M |
|
123
American Airlines Group
AAL
$8.87B
| $1.31M | 0.09% |
+35,895
| New | +$1.31M |
|
|
ARIA
124
DELISTED
Ariad Pharmaceuticals Inc
ARIA
| $1.28M | 0.09% |
93,693
-84,223
| -47% | -$1.15M |
|
125
Radware
RDWR
$1.06B
| $1.28M | 0.09% |
93,280
+57,624
| +162% | +$791K |
|