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 |
Invesco QQQ Trust
QQQ
|
$92M |
| 2 |
Walt Disney
DIS
|
$25.4M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
$12.8M |
| 4 |
Baidu
BIDU
|
$12.2M |
| 5 |
RHT
Red Hat Inc
RHT
|
$11.6M |
Top Sells
| 1 |
iShares Russell 2000 ETF
IWM
|
$61.4M |
| 2 |
Amazon
AMZN
|
$59.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$35.5M |
| 4 |
Apple
AAPL
|
$19.6M |
| 5 |
Financial Select Sector SPDR Fund
XLF
|
$18.2M |
Sector Composition
| 1 | Communication Services | 16.98% |
| 2 | Technology | 12.42% |
| 3 | Healthcare | 10.02% |
| 4 | Consumer Discretionary | 8.53% |
| 5 | Industrials | 6.02% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Cardinal Health
CAH
$36B
| $2.38M | 0.01% |
+49,496
| New | +$2.38M |
|
102
Ionis Pharmaceuticals
IONS
$9.64B
| $2.38M | 0.01% |
29,368
-4,144
| -12% | -$336K |
|
|
RTN
103
DELISTED
Raytheon Company
RTN
| $2.38M | 0.01% |
+13,048
| New | +$2.38M |
|
104
NetEase
NTES
$85.4B
| $2.37M | 0.01% |
+9,814
| New | +$2.37M |
|
105
Coterra Energy
CTRA
$18.4B
| $2.32M | 0.01% |
88,919
+6,892
| +8% | +$180K |
|
106
iShares Semiconductor ETF
SOXX
$13.4B
| $2.32M | 0.01% |
+12,234
| New | +$2.32M |
|
107
Bath & Body Works
BBWI
$6.3B
| $2.31M | 0.01% |
+83,743
| New | +$2.31M |
|
108
SPDR S&P Homebuilders ETF
XHB
$1.91B
| $2.28M | 0.01% |
+59,119
| New | +$2.28M |
|
|
STMP
109
DELISTED
Stamps.com, Inc.
STMP
| $2.27M | 0.01% |
27,933
+24,906
| +823% | +$2.03M |
|
|
ABB
110
DELISTED
ABB Ltd.
ABB
| $2.23M | 0.01% |
118,423
+56,008
| +90% | +$1.06M |
|
111
Invesco CurrencyShares Japanese Yen Trust
FXY
$559M
| $2.23M | 0.01% |
25,930
-9,932
| -28% | -$855K |
|
|
JOYY
112
JOYY Inc. American Depositary Shares
JOYY
$3.08B
| $2.23M | 0.01% |
26,564
+6,686
| +34% | +$562K |
|
113
Workday
WDAY
$62.3B
| $2.22M | 0.01% |
11,489
-21,005
| -65% | -$4.05M |
|
114
VanEck Gold Miners ETF
GDX
$19.6B
| $2.12M | 0.01% |
+94,716
| New | +$2.12M |
|
115
Carnival Corp
CCL
$42.5B
| $2.1M | 0.01% |
41,396
+10,363
| +33% | +$525K |
|
|
ICPT
116
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $2.1M | 0.01% |
18,729
+14,498
| +343% | +$1.62M |
|
117
Advanced Micro Devices
AMD
$263B
| $2.09M | 0.01% |
+81,997
| New | +$2.09M |
|
118
Direxion Daily S&P 500 Bull 3x Shares
SPXL
$5.41B
| $2.09M | 0.01% |
+44,597
| New | +$2.09M |
|
119
KraneShares CSI China Internet ETF
KWEB
$8.51B
| $2.08M | 0.01% |
44,114
+27,489
| +165% | +$1.29M |
|
120
United Rentals
URI
$60.8B
| $2.05M | 0.01% |
+17,944
| New | +$2.05M |
|
|
ACB
121
Aurora Cannabis
ACB
$276M
| $2.05M | 0.01% |
226,166
+159,395
| +239% | +$1.44M |
|
122
Materials Select Sector SPDR Fund
XLB
$5.46B
| $2.04M | 0.01% |
36,770
-70,348
| -66% | -$3.9M |
|
123
Direxion Daily Technology Bull 3x Shares
TECL
$3.42B
| $2M | 0.01% |
+14,433
| New | +$2M |
|
124
AT&T
T
$208B
| $1.99M | 0.01% |
+63,378
| New | +$1.99M |
|
|
CLDR
125
DELISTED
Cloudera, Inc.
CLDR
| $1.98M | 0.01% |
181,405
+159,915
| +744% | +$1.75M |
|