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 |
NVIDIA
NVDA
|
$29.3M |
| 2 |
Industrial Select Sector SPDR Fund
XLI
|
$23.1M |
| 3 |
iShares Russell 2000 ETF
IWM
|
$18M |
| 4 |
Netflix
NFLX
|
$17.4M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$14M |
Top Sells
| 1 |
Invesco QQQ Trust
QQQ
|
$120M |
| 2 |
SPDR S&P 500 ETF Trust
SPY
|
$41.3M |
| 3 |
Walt Disney
DIS
|
$26.9M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
$13.8M |
| 5 |
Johnson & Johnson
JNJ
|
$11.3M |
Sector Composition
| 1 | Technology | 16.22% |
| 2 | Communication Services | 16.19% |
| 3 | Healthcare | 11.36% |
| 4 | Industrials | 9.74% |
| 5 | Consumer Discretionary | 8.61% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
126
Crown Castle
CCI
$41.6B
| $1.73M | ﹤0.01% |
13,295
+9,396
| +241% | +$1.22M |
|
|
MDSO
127
DELISTED
Medidata Solutions, Inc.
MDSO
| $1.73M | ﹤0.01% |
19,086
+17,742
| +1,320% | +$1.61M |
|
128
Tyson Foods
TSN
$20B
| $1.72M | ﹤0.01% |
21,289
+2,935
| +16% | +$237K |
|
129
Galapagos
GLPG
$2.1B
| $1.7M | ﹤0.01% |
+13,209
| New | +$1.7M |
|
130
Kratos Defense & Security Solutions
KTOS
$10.7B
| $1.68M | ﹤0.01% |
73,321
+20,669
| +39% | +$473K |
|
131
Carvana
CVNA
$51.1B
| $1.68M | ﹤0.01% |
+26,791
| New | +$1.68M |
|
132
WisdomTree India Earnings Fund ETF
EPI
$2.9B
| $1.67M | ﹤0.01% |
+64,129
| New | +$1.67M |
|
133
Owens Corning
OC
$12.7B
| $1.66M | ﹤0.01% |
28,562
+24,171
| +550% | +$1.41M |
|
134
Kohl's
KSS
$1.84B
| $1.64M | ﹤0.01% |
+34,587
| New | +$1.64M |
|
135
Blackstone
BX
$133B
| $1.64M | ﹤0.01% |
36,858
+23,262
| +171% | +$1.03M |
|
|
SFLY
136
DELISTED
Shutterfly, Inc.
SFLY
| $1.64M | ﹤0.01% |
32,370
+19,670
| +155% | +$994K |
|
137
Moody's
MCO
$89.6B
| $1.64M | ﹤0.01% |
+8,375
| New | +$1.64M |
|
138
LyondellBasell Industries
LYB
$17.5B
| $1.63M | ﹤0.01% |
+18,885
| New | +$1.63M |
|
139
W.W. Grainger
GWW
$49.2B
| $1.62M | ﹤0.01% |
6,038
+3,990
| +195% | +$1.07M |
|
140
Invesco CurrencyShares Euro Currency Trust
FXE
$527M
| $1.61M | ﹤0.01% |
14,832
+12,693
| +593% | +$1.37M |
|
141
uniQure
QURE
$973M
| $1.6M | ﹤0.01% |
20,444
+19,414
| +1,885% | +$1.52M |
|
142
Veeva Systems
VEEV
$44.3B
| $1.6M | ﹤0.01% |
+9,842
| New | +$1.6M |
|
143
CVS Health
CVS
$93.5B
| $1.58M | ﹤0.01% |
+28,949
| New | +$1.58M |
|
144
Capri Holdings
CPRI
$2.59B
| $1.58M | ﹤0.01% |
45,416
+11,548
| +34% | +$400K |
|
145
Wynn Resorts
WYNN
$12.8B
| $1.57M | ﹤0.01% |
12,647
-58,803
| -82% | -$7.29M |
|
146
Edison International
EIX
$21B
| $1.56M | ﹤0.01% |
23,151
-5,810
| -20% | -$391K |
|
147
VanEck Semiconductor ETF
SMH
$27B
| $1.56M | ﹤0.01% |
+28,282
| New | +$1.56M |
|
148
Weibo
WB
$2.83B
| $1.55M | ﹤0.01% |
35,650
+23,144
| +185% | +$1.01M |
|
|
UN
149
DELISTED
Unilever NV New York Registry Shares
UN
| $1.54M | ﹤0.01% |
25,354
-431
| -2% | -$26.2K |
|
150
Atlassian
TEAM
$44.1B
| $1.52M | ﹤0.01% |
11,624
-583
| -5% | -$76.2K |
|