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 |
LNKD
LinkedIn Corporation
LNKD
|
$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
$14.9M |
| 4 |
Biogen
BIIB
|
$13.7M |
| 5 |
Visa
V
|
$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
$15.8M |
| 4 |
Citigroup
C
|
$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
76
TripAdvisor
TRIP
$2.02B
| $2.22M | 0.15% | 34,552 +4,475 | +15% | +$288K |
|
|
N
77
DELISTED
Netsuite Inc
N
| $2.16M | 0.14% | 29,710 +21,923 | +282% | +$1.6M |
|
78
lululemon athletica
LULU
$24.2B
| $2.16M | 0.14% | 29,270 +8,294 | +40% | +$612K |
|
79
Fiserv
FI
$75.1B
| $2.15M | 0.14% | 19,795 +15,011 | +314% | +$1.63M |
|
|
GG
80
DELISTED
Goldcorp Inc
GG
| $2.14M | 0.14% | +111,622 | New | +$2.14M |
|
81
MetLife
MET
$54.1B
| $2.13M | 0.14% | +53,513 | New | +$2.13M |
|
82
iShares MSCI Germany ETF
EWG
$2.54B
| $2.13M | 0.14% | +88,378 | New | +$2.13M |
|
83
Monster Beverage
MNST
$60.9B
| $2.1M | 0.14% | +13,063 | New | +$2.1M |
|
84
Marriott International Class A Common Stock
MAR
$72.7B
| $2.04M | 0.14% | +30,768 | New | +$2.04M |
|
|
VIAB
85
DELISTED
Viacom Inc. Class B
VIAB
| $1.99M | 0.13% | 48,038 +10,684 | +29% | +$443K |
|
|
XLNX
86
DELISTED
Xilinx Inc
XLNX
| $1.92M | 0.13% | +41,655 | New | +$1.92M |
|
87
F5
FFIV
$18B
| $1.89M | 0.13% | 16,642 +7,582 | +84% | +$863K |
|
|
DRII
88
DELISTED
DIAMOND RESORTS INTL, INC
DRII
| $1.88M | 0.13% | 62,834 +50,122 | +394% | +$1.5M |
|
|
ALXN
89
DELISTED
Alexion Pharmaceuticals Inc
ALXN
| $1.88M | 0.13% | +16,097 | New | +$1.88M |
|
90
United Natural Foods
UNFI
$1.71B
| $1.87M | 0.12% | 39,929 +35,819 | +872% | +$1.68M |
|
91
Bank of America
BAC
$376B
| $1.83M | 0.12% | 138,274 -425,530 | -75% | -$5.64M |
|
92
ProShares UltraShort S&P500
SDS
$445M
| $1.81M | 0.12% | 101,765 -35,924 | -26% | -$640K |
|
93
Ametek
AME
$42.7B
| $1.8M | 0.12% | +38,916 | New | +$1.8M |
|
94
Cummins
CMI
$54.9B
| $1.8M | 0.12% | 15,972 +2,276 | +17% | +$256K |
|
|
SNP
95
DELISTED
CHINA PETROLEUM & CHEMICAL CORPORATION ADS (REP 100 ORDINARY H SHARES)
SNP
| $1.78M | 0.12% | 24,778 +8,871 | +56% | +$639K |
|
|
DWA
96
DELISTED
DREAMWORKS ANIMATION SKG INC CL-A
DWA
| $1.77M | 0.12% | 43,342 +36,860 | +569% | +$1.51M |
|
97
Alaska Air
ALK
$7.24B
| $1.77M | 0.12% | 30,321 +25,965 | +596% | +$1.51M |
|
|
AMJ
98
DELISTED
JP Morgan Alerian MLP Index ETN 5/24/24
AMJ
| $1.73M | 0.12% | +54,431 | New | +$1.73M |
|
99
Boston Scientific
BSX
$156B
| $1.73M | 0.12% | 73,834 +66,642 | +927% | +$1.56M |
|
100
ProShares Ultra QQQ
QLD
$8.91B
| $1.72M | 0.11% | 24,135 +17,684 | +274% | +$1.26M |
|