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
|
$54.6M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$52.5M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$40.9M |
| 4 |
Apple
AAPL
|
$16.5M |
| 5 |
Visa
V
|
$12M |
Top Sells
| 1 |
Amazon
AMZN
|
$98.7M |
| 2 |
Meta Platforms (Facebook)
META
|
$70.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
$33.4M |
| 4 |
Goldman Sachs
GS
|
$30.2M |
| 5 |
Boeing
BA
|
$26.5M |
Sector Composition
| 1 | Communication Services | 14.71% |
| 2 | Consumer Discretionary | 14.32% |
| 3 | Technology | 11.86% |
| 4 | Financials | 7.38% |
| 5 | Industrials | 6.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
126
RH
RH
$4.7B
| $1.62M | ﹤0.01% |
13,481
-7,685
| -36% | -$921K |
|
127
MSCI
MSCI
$42.9B
| $1.6M | ﹤0.01% |
+10,860
| New | +$1.6M |
|
128
Molson Coors Class B
TAP
$9.96B
| $1.59M | ﹤0.01% |
28,326
+14,928
| +111% | +$838K |
|
129
Union Pacific
UNP
$131B
| $1.58M | ﹤0.01% |
11,455
-77,632
| -87% | -$10.7M |
|
130
Waste Management
WM
$88.6B
| $1.58M | ﹤0.01% |
17,729
-14,346
| -45% | -$1.28M |
|
131
Align Technology
ALGN
$10.1B
| $1.57M | ﹤0.01% |
7,496
-8,137
| -52% | -$1.7M |
|
|
MNDT
132
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.57M | ﹤0.01% |
96,728
+42,529
| +78% | +$689K |
|
133
SPDR S&P Retail ETF
XRT
$441M
| $1.56M | ﹤0.01% |
37,981
-69,746
| -65% | -$2.86M |
|
134
Transocean
RIG
$2.9B
| $1.55M | ﹤0.01% |
223,335
+222,479
| +25,991% | +$1.54M |
|
135
Carnival Corp
CCL
$42.8B
| $1.53M | ﹤0.01% |
31,033
+12,322
| +66% | +$607K |
|
136
International Paper
IP
$25.7B
| $1.5M | ﹤0.01% |
39,123
+21,723
| +125% | +$830K |
|
137
Shopify
SHOP
$191B
| $1.49M | ﹤0.01% |
107,970
+5,290
| +5% | +$73.2K |
|
|
IMMU
138
DELISTED
Immunomedics Inc
IMMU
| $1.49M | ﹤0.01% |
104,532
+60,771
| +139% | +$867K |
|
139
Blackstone
BX
$133B
| $1.48M | ﹤0.01% |
+49,582
| New | +$1.48M |
|
|
CLVS
140
DELISTED
Clovis Oncology, Inc.
CLVS
| $1.48M | ﹤0.01% |
82,311
+47,984
| +140% | +$862K |
|
|
ETFC
141
DELISTED
E*Trade Financial Corporation
ETFC
| $1.48M | ﹤0.01% |
33,677
-30,086
| -47% | -$1.32M |
|
142
Mohawk Industries
MHK
$8.65B
| $1.47M | ﹤0.01% |
12,571
+10,744
| +588% | +$1.26M |
|
143
Texas Capital Bancshares
TCBI
$3.96B
| $1.47M | ﹤0.01% |
28,777
+26,819
| +1,370% | +$1.37M |
|
144
iShares MSCI Europe Financials ETF
EUFN
$4.36B
| $1.46M | ﹤0.01% |
86,123
+72,622
| +538% | +$1.23M |
|
145
IAC Inc
IAC
$2.98B
| $1.46M | ﹤0.01% |
44,511
-17,693
| -28% | -$579K |
|
146
iShares US Aerospace & Defense ETF
ITA
$9.3B
| $1.45M | ﹤0.01% |
+16,834
| New | +$1.45M |
|
147
Affiliated Managers Group
AMG
$6.54B
| $1.44M | ﹤0.01% |
14,767
+12,387
| +520% | +$1.21M |
|
148
McDonald's
MCD
$224B
| $1.43M | ﹤0.01% |
8,049
+6,591
| +452% | +$1.17M |
|
149
Pacira BioSciences
PCRX
$1.19B
| $1.43M | ﹤0.01% |
33,179
+8,996
| +37% | +$387K |
|
150
Ally Financial
ALLY
$12.7B
| $1.41M | ﹤0.01% |
62,333
+24,403
| +64% | +$553K |
|