Simplex Trading

Simplex Trading Portfolio holdings

AUM $3.72B
1-Year Return 0.6%
 

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.

This Quarter Return
+0.61%
1 Year Return
+0.6%
3 Year Return
+1.23%
5 Year Return
+2.7%
10 Year Return
+32.99%
AUM
$1.23B
AUM Growth
+$82.9M
Cap. Flow
-$40.4M
Cap. Flow %
-3.29%
Top 10 Hldgs %
28.68%
Holding
3,603
New
757
Increased
577
Reduced
511
Closed
821

Top Buys

1
QQQ icon
Invesco QQQ Trust
QQQ
+$92M
2
DIS icon
Walt Disney
DIS
+$25.4M
3
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$12.8M
4
BIDU icon
Baidu
BIDU
+$12.2M
5
RHT
Red Hat Inc
RHT
+$11.6M

Top Sells

1
IWM icon
iShares Russell 2000 ETF
IWM
+$61.4M
2
AMZN icon
Amazon
AMZN
+$59.6M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$35.5M
4
AAPL icon
Apple
AAPL
+$19.6M
5
XLF icon
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 6.01%
Name Market Value Portfolio Weight Shares or Principal Shares
Change % 		Capital Flow
CXDC
2176
DELISTED
China XD Plastics Company Limited
CXDC
– –
-610
Closed -$1K
RPAI
2177
DELISTED
RETAIL PROPERTIES OF AMERICA, INC.
RPAI
– –
-50
Closed –
TLGT
2178
DELISTED
Teligent, Inc
TLGT
– –
0
– –
GPX
2179
DELISTED
GP Strategies Corp.
GPX
– –
-10
Closed –
XEC
2180
DELISTED
CIMAREX ENERGY CO
XEC
– –
0
– –
SQBG
2181
DELISTED
Sequential Brands Group, Inc.
SQBG
$0 ﹤0.01%
+7
New –
CORE
2182
DELISTED
Core Mark Holding Co., Inc.
CORE
– –
-5,681
Closed -$132K
QTS
2183
DELISTED
QTS REALTY TRUST, INC.
QTS
– –
0
– –
KIN
2184
DELISTED
Kindred Biosciences, Inc.
KIN
– –
0
– –
WTI icon
2185
W&T Offshore
WTI
$257M
– –
0
– –
WTRG icon
2186
Essential Utilities
WTRG
$10.7B
– –
-239
Closed -$8K
WTS icon
2187
Watts Water Technologies
WTS
$9.39B
– –
0
– –
WTTR icon
2188
Select Water Solutions
WTTR
$946M
– –
-389
Closed -$2K
WU icon
2189
Western Union
WU
$2.71B
– –
0
– –
WTW icon
2190
Willis Towers Watson
WTW
$33B
– –
0
– –
WW
2191
DELISTED
WW International
WW
– –
-9,590
Closed -$369K
WWD icon
2192
Woodward
WWD
$14.3B
– –
0
– –
WWW icon
2193
Wolverine World Wide
WWW
$2.48B
– –
0
– –
WY icon
2194
Weyerhaeuser
WY
$18B
– –
0
– –
XBI icon
2195
SPDR S&P Biotech ETF
XBI
$5.43B
– –
-43,720
Closed -$3.14M
XEL icon
2196
Xcel Energy
XEL
$43.4B
– –
0
– –
XENE icon
2197
Xenon Pharmaceuticals
XENE
$2.79B
– –
0
– –
XLC icon
2198
The Communication Services Select Sector SPDR Fund
XLC
$26.7B
– –
-4,180
Closed -$172K
XLF icon
2199
Financial Select Sector SPDR Fund
XLF
$54.6B
– –
-762,502
Closed -$18.2M
XLP icon
2200
Consumers Staples Select Sector SPDR Fund
XLP
$16B
– –
-117,621
Closed -$5.97M
86 87
88
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