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 | |
|---|---|---|---|---|---|---|
126
United States Oil Fund
USO
$967M
| $1.35M | 0.09% |
+14,544
| New | +$1.35M |
|
127
US Bancorp
USB
$75.5B
| $1.34M | 0.09% |
+33,205
| New | +$1.34M |
|
|
CST
128
DELISTED
CST Brands, Inc.
CST
| $1.33M | 0.09% |
30,824
+8,508
| +38% | +$366K |
|
|
129
Broadcom
AVGO
$1.42T
| $1.32M | 0.09% |
85,250
-2,408,150
| -97% | -$37.4M |
|
130
Teck Resources
TECK
$16.5B
| $1.31M | 0.09% |
+99,812
| New | +$1.31M |
|
131
Southwest Airlines
LUV
$17B
| $1.31M | 0.09% |
33,536
+19,777
| +144% | +$775K |
|
|
ARIA
132
DELISTED
Ariad Pharmaceuticals Inc
ARIA
| $1.31M | 0.09% |
177,916
+133,255
| +298% | +$984K |
|
133
BioMarin Pharmaceuticals
BMRN
$11.3B
| $1.29M | 0.09% |
16,603
+16,011
| +2,705% | +$1.24M |
|
134
Herbalife
HLF
$1.02B
| $1.26M | 0.08% |
42,892
-122,690
| -74% | -$3.59M |
|
135
AstraZeneca
AZN
$255B
| $1.21M | 0.08% |
40,137
+27,090
| +208% | +$817K |
|
|
ABMD
136
DELISTED
Abiomed Inc
ABMD
| $1.2M | 0.08% |
+11,001
| New | +$1.2M |
|
137
Helmerich & Payne
HP
$2B
| $1.2M | 0.08% |
17,879
+10,841
| +154% | +$728K |
|
|
JUNO
138
DELISTED
Juno Therapeutics, Inc.
JUNO
| $1.19M | 0.08% |
30,831
+15,706
| +104% | +$604K |
|
|
CY
139
DELISTED
Cypress Semiconductor
CY
| $1.18M | 0.08% |
112,209
+108,718
| +3,114% | +$1.15M |
|
140
Perrigo
PRGO
$3.21B
| $1.18M | 0.08% |
13,045
+5,192
| +66% | +$470K |
|
|
ARRS
141
DELISTED
ARRIS International plc Ordinary Shares
ARRS
| $1.17M | 0.08% |
55,864
+50,012
| +855% | +$1.05M |
|
142
Ball Corp
BALL
$13.6B
| $1.17M | 0.08% |
+32,362
| New | +$1.17M |
|
143
CNX Resources
CNX
$4.17B
| $1.17M | 0.08% |
87,032
+64,870
| +293% | +$869K |
|
144
ProShares UltraPro S&P 500
UPRO
$4.43B
| $1.15M | 0.08% |
103,884
+58,992
| +131% | +$654K |
|
|
SPLK
145
DELISTED
Splunk Inc
SPLK
| $1.12M | 0.07% |
20,702
+2,203
| +12% | +$119K |
|
146
Moody's
MCO
$89B
| $1.12M | 0.07% |
11,957
+11,574
| +3,022% | +$1.08M |
|
|
TWX
147
DELISTED
Time Warner Inc
TWX
| $1.12M | 0.07% |
15,187
-95,432
| -86% | -$7.01M |
|
148
Direxion Daily Real Estate Bull 3X Shares
DRN
$62.2M
| $1.1M | 0.07% |
42,468
+14,308
| +51% | +$371K |
|
149
Medical Properties Trust
MPW
$2.66B
| $1.1M | 0.07% |
+72,417
| New | +$1.1M |
|
150
Yum! Brands
YUM
$40.1B
| $1.09M | 0.07% |
18,205
-98,354
| -84% | -$5.86M |
|