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 | |
|---|---|---|---|---|---|---|
151
Pinterest
PINS
$25.2B
| $1.52M | ﹤0.01% |
+55,738
| New | +$1.52M |
|
152
American Airlines Group
AAL
$8.49B
| $1.52M | ﹤0.01% |
46,489
-151,869
| -77% | -$4.95M |
|
153
Consumer Discretionary Select Sector SPDR Fund
XLY
$23.6B
| $1.51M | ﹤0.01% |
+12,709
| New | +$1.51M |
|
154
DXC Technology
DXC
$2.6B
| $1.5M | ﹤0.01% |
+27,235
| New | +$1.5M |
|
|
MDCO
155
DELISTED
Medicines Co
MDCO
| $1.5M | ﹤0.01% |
41,125
+24,112
| +142% | +$879K |
|
156
Ionis Pharmaceuticals
IONS
$9.46B
| $1.49M | ﹤0.01% |
23,183
-6,185
| -21% | -$397K |
|
|
WAGE
157
DELISTED
WageWorks, Inc.
WAGE
| $1.49M | ﹤0.01% |
29,264
+11,321
| +63% | +$575K |
|
158
Dillards
DDS
$8.91B
| $1.48M | ﹤0.01% |
+23,784
| New | +$1.48M |
|
159
Direxion Daily S&P 500 Bear 3x Shares
SPXS
$438M
| $1.45M | ﹤0.01% |
7,898
+5,191
| +192% | +$954K |
|
|
WP
160
DELISTED
Worldpay, Inc.
WP
| $1.43M | ﹤0.01% |
+11,706
| New | +$1.43M |
|
161
Invesco CurrencyShares British Pound Sterling Trust
FXB
$90.3M
| $1.43M | ﹤0.01% |
+11,629
| New | +$1.43M |
|
162
Waste Connections
WCN
$46.6B
| $1.43M | ﹤0.01% |
14,935
+14,058
| +1,603% | +$1.34M |
|
163
Zebra Technologies
ZBRA
$15.8B
| $1.41M | ﹤0.01% |
+6,731
| New | +$1.41M |
|
164
Brinker International
EAT
$7.11B
| $1.41M | ﹤0.01% |
+35,716
| New | +$1.41M |
|
165
SPDR Bloomberg High Yield Bond ETF
JNK
$8.09B
| $1.4M | ﹤0.01% |
+12,856
| New | +$1.4M |
|
166
Ubiquiti
UI
$34.2B
| $1.4M | ﹤0.01% |
+10,648
| New | +$1.4M |
|
167
Exact Sciences
EXAS
$9.73B
| $1.39M | ﹤0.01% |
+11,765
| New | +$1.39M |
|
|
AMRN
168
Amarin Corp
AMRN
$311M
| $1.38M | ﹤0.01% |
3,557
+481
| +16% | +$186K |
|
169
KB Home
KBH
$4.49B
| $1.37M | ﹤0.01% |
53,404
-49,554
| -48% | -$1.27M |
|
|
CZR
170
DELISTED
Caesars Entertainment Corporation
CZR
| $1.37M | ﹤0.01% |
+115,578
| New | +$1.37M |
|
171
Ashland
ASH
$2.48B
| $1.37M | ﹤0.01% |
+17,071
| New | +$1.37M |
|
172
NRG Energy
NRG
$28.6B
| $1.37M | ﹤0.01% |
38,872
+25,078
| +182% | +$881K |
|
173
Invesco CurrencyShares Canadian Dollar Trust
FXC
$91.9M
| $1.35M | ﹤0.01% |
17,973
+16,113
| +866% | +$1.21M |
|
174
Akamai
AKAM
$11.1B
| $1.35M | ﹤0.01% |
+16,835
| New | +$1.35M |
|
175
Masco
MAS
$15.5B
| $1.35M | ﹤0.01% |
+34,281
| New | +$1.35M |
|