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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Gilead Sciences
GILD
|
+$33M |
| 2 |
Apple
AAPL
|
+$32.5M |
| 3 |
Booking.com
BKNG
|
+$28.7M |
| 4 |
Amazon
AMZN
|
+$25.7M |
| 5 |
Baidu
BIDU
|
+$16.3M |
Top Sells
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 13.8% |
| 2 | Technology | 11.13% |
| 3 | Healthcare | 8.34% |
| 4 | Energy | 5.42% |
| 5 | Communication Services | 4.79% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
KKD
126
DELISTED
KRISPY KREME DOUGHNUTS INC
KKD
| $1.13M | 0.14% |
+57,112
| New | +$1.08M |
|
127
CALL
Intel
INTC
$530B
| $1.11M | 0.13% |
+2,393
| New | +$83.3K |
|
|
NBIS
128
Nebius Group N.V.
NBIS
$55.1B
| $1.1M | 0.13% |
+61,355
| New | +$1.48M |
|
129
Deere & Co
DE
$158B
| $1.1M | 0.13% |
+12,410
| New | +$1.07M |
|
130
PUT
Cleveland-Cliffs
CLF
$5.12B
| $1.1M | 0.13% |
+1,535
| New | +$13.4K |
|
131
Intuitive Surgical
ISRG
$124B
| $1.08M | 0.13% |
+18,387
| New | +$1.02M |
|
132
Mercado Libre
MELI
$92.4B
| $1.07M | 0.13% |
+8,386
| New | +$1.06M |
|
133
GSK
GSK
$102B
| $1.07M | 0.13% |
+20,007
| New | +$1.12M |
|
134
Intercontinental Exchange
ICE
$78.4B
| $1.06M | 0.13% |
+24,270
| New | +$1.04M |
|
|
APOL
135
DELISTED
Apollo Education Group Inc Class A
APOL
| $1.03M | 0.12% |
+30,184
| New | +$889K |
|
136
BP
BP
$110B
| $1.02M | 0.12% |
+32,320
| New | +$1.09M |
|
137
Vanguard FTSE Europe ETF
VGK
$30.1B
| $1.01M | 0.12% |
+19,342
| New | +$1.04M |
|
138
Whirlpool
WHR
$2.36B
| $1.01M | 0.12% |
+5,193
| New | +$892K |
|
139
CALL
lululemon athletica
LULU
$13.2B
| $998K | 0.12% |
+1,270
| New | +$57.9K |
|
140
KB Home
KBH
$3.36B
| $962K | 0.12% |
+58,110
| New | +$934K |
|
|
GMCR
141
DELISTED
KEURIG GREEN MTN INC
GMCR
| $959K | 0.12% |
+7,245
| New | +$1.03M |
|
|
BRCM
142
DELISTED
BROADCOM CORP CL-A
BRCM
| $946K | 0.11% |
+21,840
| New | +$895K |
|
143
Teradata
TDC
$2.88B
| $932K | 0.11% |
+21,347
| New | +$914K |
|
144
PUT
Freeport-McMoran
FCX
$89.9B
| $928K | 0.11% |
+906
| New | +$25K |
|
145
NOV
NOV
$7.02B
| $923K | 0.11% |
+14,087
| New | +$981K |
|
146
CALL
Ionis Pharmaceuticals
IONS
$8.75B
| $911K | 0.11% |
+692
| New | +$34.1K |
|
147
General Motors
GM
$71.7B
| $902K | 0.11% |
+25,834
| New | +$825K |
|
148
Edwards Lifesciences
EW
$48.9B
| $900K | 0.11% |
+42,396
| New | +$852K |
|
|
CBI
149
PUT
DELISTED
Chicago Bridge & Iron Nv
CBI
| $895K | 0.11% |
+577
| New | +$28.4K |
|
150
Tapestry
TPR
$28.7B
| $891K | 0.11% |
+23,716
| New | +$836K |
|
Similar funds
Simplex Trading's Q4 2014 Portfolio in Review
Q4 2014 is the first quarter with a 13F filing on record for Simplex Trading, which disclosed 4,682 positions worth $826M. Its ten largest holdings account for 23% of the portfolio.
Its largest position is Gilead Sciences: 319,426 shares worth $30.1M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2014 buy was Gilead Sciences: 319,426 shares worth $30.1M.
- Simplex Trading's ten largest holdings make up 23% of its $826M portfolio in Q4 2014.
- Simplex Trading disclosed 4,682 positions in Q4 2014, its first 13F filing on record.
Based on Simplex Trading's 13F filing for Q4 2014, filed 4 Mar 2015.