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 |
Amazon
AMZN
|
$44.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$31.7M |
| 3 |
TWX
Time Warner Inc
TWX
|
$26.1M |
| 4 |
Booking.com
BKNG
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.2M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$42.8M |
| 2 |
Amgen
AMGN
|
$32.3M |
| 3 |
Baidu
BIDU
|
$21.9M |
| 4 |
Micron Technology
MU
|
$21.2M |
| 5 |
Alphabet (Google) Class A
GOOGL
|
$17.7M |
Sector Composition
| 1 | Consumer Discretionary | 21.41% |
| 2 | Technology | 19.71% |
| 3 | Communication Services | 17.68% |
| 4 | Healthcare | 6.08% |
| 5 | Financials | 5.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
Biogen
BIIB
$19.4B
| $2.47M | 0.1% | +7,879 | New | +$2.47M |
|
102
Delta Air Lines
DAL
$40.3B
| $2.46M | 0.1% | 51,057 -23,440 | -31% | -$1.13M |
|
103
FibroGen
FGEN
$47.8M
| $2.42M | 0.1% | 45,071 +16,340 | +57% | +$879K |
|
104
AT&T
T
$209B
| $2.42M | 0.1% | +61,656 | New | +$2.42M |
|
105
Domino's
DPZ
$15.6B
| $2.37M | 0.1% | 11,933 +3,304 | +38% | +$656K |
|
|
STRP
106
DELISTED
Straight Path Communications Inc.
STRP
| $2.36M | 0.1% | 13,081 +12,266 | +1,505% | +$2.22M |
|
107
US Bancorp
USB
$76B
| $2.32M | 0.09% | +43,269 | New | +$2.32M |
|
108
VanEck Junior Gold Miners ETF
GDXJ
$6.6B
| $2.28M | 0.09% | +67,918 | New | +$2.28M |
|
|
CLVS
109
DELISTED
Clovis Oncology, Inc.
CLVS
| $2.26M | 0.09% | 27,403 +23,373 | +580% | +$1.93M |
|
|
EVHC
110
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $2.24M | 0.09% | 49,936 +46,743 | +1,464% | +$2.1M |
|
111
NRG Energy
NRG
$28.2B
| $2.23M | 0.09% | 87,067 +32,589 | +60% | +$834K |
|
|
LSI
112
DELISTED
Life Storage, Inc.
LSI
| $2.21M | 0.09% | 26,966 +10,471 | +63% | +$857K |
|
113
Bank of America
BAC
$376B
| $2.19M | 0.09% | 86,439 -6,663 | -7% | -$169K |
|
114
AutoZone
AZO
$70.2B
| $2.19M | 0.09% | 3,674 +3,130 | +575% | +$1.86M |
|
115
BlackBerry
BB
$2.28B
| $2.18M | 0.09% | 194,959 +52,515 | +37% | +$587K |
|
116
Microsoft
MSFT
$3.77T
| $2.16M | 0.09% | 29,058 -192,135 | -87% | -$14.3M |
|
117
Sarepta Therapeutics
SRPT
$1.78B
| $2.1M | 0.09% | 46,396 +26,356 | +132% | +$1.2M |
|
|
PARA
118
DELISTED
Paramount Global Class B
PARA
| $2.1M | 0.09% | +36,274 | New | +$2.1M |
|
119
BHP
BHP
$142B
| $2.1M | 0.09% | 51,796 +6,265 | +14% | +$254K |
|
120
Medtronic
MDT
$119B
| $2.05M | 0.08% | +26,417 | New | +$2.05M |
|
121
Zoetis
ZTS
$69.3B
| $2.05M | 0.08% | 32,166 +23,369 | +266% | +$1.49M |
|
122
Albemarle
ALB
$9.99B
| $2.04M | 0.08% | +14,990 | New | +$2.04M |
|
|
X
123
DELISTED
US Steel
X
| $2.03M | 0.08% | 79,093 -439,895 | -85% | -$11.3M |
|
124
AbbVie
ABBV
$372B
| $2.03M | 0.08% | 22,796 -76,830 | -77% | -$6.82M |
|
|
NBIS
125
Nebius Group N.V. Class A Ordinary Shares
NBIS
$16.3B
| $2.03M | 0.08% | +61,482 | New | +$2.03M |
|