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 |
SPDR S&P 500 ETF Trust
SPY
|
$50.9M |
| 2 |
Citigroup
C
|
$25.9M |
| 3 |
Apple
AAPL
|
$25.1M |
| 4 |
Amazon
AMZN
|
$21.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$18.3M |
Top Sells
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
$17.4M |
| 2 |
Wells Fargo
WFC
|
$11.9M |
| 3 |
Goldman Sachs
GS
|
$9.91M |
| 4 |
MDVN
MEDIVATION, INC.
MDVN
|
$8.62M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
$8.15M |
Sector Composition
| 1 | Communication Services | 15.08% |
| 2 | Technology | 12.4% |
| 3 | Healthcare | 11.9% |
| 4 | Consumer Discretionary | 11.24% |
| 5 | Financials | 9.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
SPDR Euro Stoxx 50 ETF
FEZ
$4.5B
| $1.77M | 0.11% |
52,921
+44,772
| +549% | +$1.5M |
|
|
CELG
102
DELISTED
Celgene Corp
CELG
| $1.75M | 0.1% |
+15,147
| New | +$1.75M |
|
103
Hain Celestial
HAIN
$164M
| $1.75M | 0.1% |
44,766
+14,338
| +47% | +$560K |
|
|
MENT
104
DELISTED
Mentor Graphics Corp
MENT
| $1.71M | 0.1% |
+46,484
| New | +$1.71M |
|
105
CarMax
KMX
$9.04B
| $1.7M | 0.1% |
26,425
+9,712
| +58% | +$625K |
|
106
Thermo Fisher Scientific
TMO
$183B
| $1.57M | 0.09% |
+11,096
| New | +$1.57M |
|
107
PayPal
PYPL
$66.5B
| $1.53M | 0.09% |
+38,696
| New | +$1.53M |
|
108
HDFC Bank
HDB
$181B
| $1.52M | 0.09% |
+25,077
| New | +$1.52M |
|
|
RAD
109
DELISTED
Rite Aid Corporation
RAD
| $1.52M | 0.09% |
+184,341
| New | +$1.52M |
|
110
Zoetis
ZTS
$67.6B
| $1.49M | 0.09% |
+27,841
| New | +$1.49M |
|
|
X
111
DELISTED
US Steel
X
| $1.48M | 0.09% |
44,872
-121,528
| -73% | -$4.01M |
|
112
Sherwin-Williams
SHW
$90.5B
| $1.48M | 0.09% |
+5,503
| New | +$1.48M |
|
113
Fidelity National Information Services
FIS
$35.6B
| $1.48M | 0.09% |
+19,529
| New | +$1.48M |
|
114
Cisco
CSCO
$268B
| $1.46M | 0.09% |
48,436
-150,033
| -76% | -$4.53M |
|
|
APC
115
DELISTED
Anadarko Petroleum
APC
| $1.46M | 0.09% |
20,910
+14,303
| +216% | +$997K |
|
116
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$304M
| $1.45M | 0.09% |
35,574
-13,281
| -27% | -$542K |
|
|
DNKN
117
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $1.45M | 0.09% |
+27,706
| New | +$1.45M |
|
|
CAB
118
DELISTED
Cabela's Inc
CAB
| $1.43M | 0.09% |
24,492
-26,190
| -52% | -$1.53M |
|
119
Casey's General Stores
CASY
$18.6B
| $1.42M | 0.08% |
11,958
+6,117
| +105% | +$727K |
|
120
Perrigo
PRGO
$3.21B
| $1.41M | 0.08% |
16,968
+16,770
| +8,470% | +$1.4M |
|
|
LLL
121
DELISTED
L3 Technologies, Inc.
LLL
| $1.41M | 0.08% |
+9,283
| New | +$1.41M |
|
122
InterDigital
IDCC
$7.35B
| $1.4M | 0.08% |
15,359
+8,895
| +138% | +$813K |
|
123
Amgen
AMGN
$153B
| $1.4M | 0.08% |
9,578
-6,836
| -42% | -$999K |
|
124
Franco-Nevada
FNV
$36.6B
| $1.4M | 0.08% |
+23,422
| New | +$1.4M |
|
125
Philips
PHG
$25.8B
| $1.39M | 0.08% |
45,413
+13,010
| +40% | +$398K |
|