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 |
Alphabet (Google) Class C
GOOG
|
$54.1M |
| 2 |
Apple
AAPL
|
$28.6M |
| 3 |
Meta Platforms (Facebook)
META
|
$16.5M |
| 4 |
IBM
IBM
|
$13.4M |
| 5 |
Baidu
BIDU
|
$10.3M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 2 |
McDonald's
MCD
|
$8.52M |
| 3 |
Ralph Lauren
RL
|
$5.22M |
| 4 |
Intel
INTC
|
$4.74M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
$4.67M |
Sector Composition
| 1 | Communication Services | 22.01% |
| 2 | Technology | 15.83% |
| 3 | Healthcare | 11.95% |
| 4 | Consumer Discretionary | 9.73% |
| 5 | Financials | 7.98% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
101
eBay
EBAY
$41.2B
| $1.38M | 0.12% |
22,887
+91
| +0.4% | +$5.5K |
|
|
PPO
102
DELISTED
POLYPORE INTERNATIONAL, INC
PPO
| $1.37M | 0.11% |
22,856
+21,317
| +1,385% | +$1.28M |
|
103
Zoetis
ZTS
$67.6B
| $1.34M | 0.11% |
27,803
+21,384
| +333% | +$1.03M |
|
104
Valero Energy
VLO
$48.3B
| $1.31M | 0.11% |
20,869
+19,805
| +1,861% | +$1.24M |
|
|
MNK
105
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $1.3M | 0.11% |
11,017
+4,645
| +73% | +$546K |
|
106
YPF
YPF
$11.6B
| $1.29M | 0.11% |
+47,038
| New | +$1.29M |
|
|
SPLK
107
DELISTED
Splunk Inc
SPLK
| $1.28M | 0.11% |
18,430
+4,678
| +34% | +$326K |
|
|
CTXS
108
DELISTED
Citrix Systems Inc
CTXS
| $1.27M | 0.11% |
18,166
+17,966
| +8,983% | +$1.26M |
|
109
lululemon athletica
LULU
$23.8B
| $1.27M | 0.11% |
19,503
-5,829
| -23% | -$380K |
|
110
JD.com
JD
$44.2B
| $1.25M | 0.1% |
36,741
-15,720
| -30% | -$536K |
|
|
ENDP
111
DELISTED
Endo International plc
ENDP
| $1.25M | 0.1% |
+15,724
| New | +$1.25M |
|
112
Synchrony
SYF
$28.1B
| $1.25M | 0.1% |
37,849
+37,679
| +22,164% | +$1.24M |
|
|
AERI
113
DELISTED
Aerie Pharmaceuticals, Inc.
AERI
| $1.24M | 0.1% |
+70,424
| New | +$1.24M |
|
114
ResMed
RMD
$39.4B
| $1.24M | 0.1% |
+21,995
| New | +$1.24M |
|
|
HOT
115
DELISTED
STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
HOT
| $1.24M | 0.1% |
+15,261
| New | +$1.24M |
|
116
Assured Guaranty
AGO
$3.89B
| $1.23M | 0.1% |
+51,178
| New | +$1.23M |
|
117
Green Dot
GDOT
$760M
| $1.22M | 0.1% |
63,913
+63,055
| +7,349% | +$1.21M |
|
118
Cummins
CMI
$54B
| $1.21M | 0.1% |
+9,221
| New | +$1.21M |
|
|
OVTI
119
DELISTED
OMNIVISION TECHNOLOGIES INC
OVTI
| $1.2M | 0.1% |
+45,751
| New | +$1.2M |
|
120
DaVita
DVA
$9.72B
| $1.19M | 0.1% |
14,971
+10,969
| +274% | +$871K |
|
121
Blackstone
BX
$131B
| $1.18M | 0.1% |
+28,944
| New | +$1.18M |
|
122
Markel Group
MKL
$24.7B
| $1.18M | 0.1% |
1,474
+1,301
| +752% | +$1.04M |
|
123
iShares MSCI Brazil ETF
EWZ
$5.35B
| $1.16M | 0.1% |
35,521
+1,150
| +3% | +$37.7K |
|
124
Delta Air Lines
DAL
$40B
| $1.15M | 0.1% |
28,093
+15,686
| +126% | +$644K |
|
125
Allstate
ALL
$53.9B
| $1.15M | 0.1% |
17,673
+16,930
| +2,279% | +$1.1M |
|