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 | |
|---|---|---|---|---|---|---|
101
ProShares Ultra Real Estate
URE
$60.8M
| $1.71M | 0.11% | 13,337 +361 | +3% | +$46.2K |
|
102
Regeneron Pharmaceuticals
REGN
$61.5B
| $1.7M | 0.11% | +4,864 | New | +$1.7M |
|
103
Applied Materials
AMAT
$128B
| $1.68M | 0.11% | 70,187 +37,255 | +113% | +$893K |
|
104
Halliburton
HAL
$19.4B
| $1.68M | 0.11% | +37,142 | New | +$1.68M |
|
105
Wynn Resorts
WYNN
$13.2B
| $1.67M | 0.11% | 18,439 -31,164 | -63% | -$2.82M |
|
106
Mondelez International
MDLZ
$79.5B
| $1.67M | 0.11% | 36,629 -33,586 | -48% | -$1.53M |
|
|
IM
107
DELISTED
Ingram Micro
IM
| $1.64M | 0.11% | 47,109 +22,371 | +90% | +$778K |
|
108
DexCom
DXCM
$29.5B
| $1.64M | 0.11% | 20,639 +20,040 | +3,346% | +$1.59M |
|
109
Vodafone
VOD
$28.8B
| $1.64M | 0.11% | +52,992 | New | +$1.64M |
|
|
MNDT
110
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.61M | 0.11% | 97,642 +65,378 | +203% | +$1.08M |
|
|
WFM
111
DELISTED
Whole Foods Market Inc
WFM
| $1.6M | 0.11% | 50,065 +47,798 | +2,108% | +$1.53M |
|
|
SWN
112
DELISTED
Southwestern Energy Company
SWN
| $1.56M | 0.1% | +123,746 | New | +$1.56M |
|
113
Seagate
STX
$35.6B
| $1.55M | 0.1% | +63,656 | New | +$1.55M |
|
114
The Mosaic Company
MOS
$10.6B
| $1.54M | 0.1% | +58,901 | New | +$1.54M |
|
|
WR
115
DELISTED
Westar Energy Inc
WR
| $1.53M | 0.1% | +27,339 | New | +$1.53M |
|
116
NextEra Energy, Inc.
NEE
$148B
| $1.53M | 0.1% | 11,716 +2,967 | +34% | +$387K |
|
117
CF Industries
CF
$14B
| $1.53M | 0.1% | 63,333 +53,926 | +573% | +$1.3M |
|
|
LXK
118
DELISTED
Lexmark Intl Inc
LXK
| $1.52M | 0.1% | +40,224 | New | +$1.52M |
|
119
SPDR S&P Retail ETF
XRT
$425M
| $1.5M | 0.1% | 35,843 +8,196 | +30% | +$344K |
|
|
QLIK
120
DELISTED
QLIK TECHNOLOGIES INC COM STK (DE)
QLIK
| $1.43M | 0.1% | 48,459 +47,630 | +5,745% | +$1.41M |
|
|
MRO
121
DELISTED
Marathon Oil Corporation
MRO
| $1.43M | 0.1% | +95,455 | New | +$1.43M |
|
122
Carnival Corp
CCL
$43.2B
| $1.43M | 0.1% | +32,369 | New | +$1.43M |
|
123
Blackstone
BX
$134B
| $1.35M | 0.09% | 55,171 -33,322 | -38% | -$817K |
|
124
Salesforce
CRM
$245B
| $1.35M | 0.09% | 17,039 -11,750 | -41% | -$933K |
|
|
ESRX
125
DELISTED
Express Scripts Holding Company
ESRX
| $1.35M | 0.09% | +17,810 | New | +$1.35M |
|