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 |
Apple
AAPL
|
$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$38.8M |
| 4 |
Amazon
AMZN
|
$38.6M |
| 5 |
Tesla
TSLA
|
$36M |
Top Sells
| 1 |
Alibaba
BABA
|
$46.4M |
| 2 |
Boeing
BA
|
$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
NVIDIA
NVDA
|
$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$11.4B
| $1.7M | ﹤0.01% |
92,535
+5,490
| +6% | +$101K |
|
|
ICPT
177
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $1.69M | ﹤0.01% |
13,634
+10,975
| +413% | +$1.36M |
|
178
Quest Diagnostics
DGX
$20.4B
| $1.69M | ﹤0.01% |
15,811
+10,487
| +197% | +$1.12M |
|
179
Liberty Global Class A
LBTYA
$4.08B
| $1.68M | ﹤0.01% |
73,828
+24,066
| +48% | +$547K |
|
|
PLAN
180
DELISTED
Anaplan, Inc.
PLAN
| $1.61M | ﹤0.01% |
30,721
+23,425
| +321% | +$1.23M |
|
181
Arrowhead Research
ARWR
$4B
| $1.61M | ﹤0.01% |
25,339
-6,730
| -21% | -$427K |
|
182
Mercado Libre
MELI
$121B
| $1.59M | ﹤0.01% |
+2,783
| New | +$1.59M |
|
183
TAL Education Group
TAL
$6.18B
| $1.59M | ﹤0.01% |
33,013
+23,755
| +257% | +$1.14M |
|
184
ProShares UltraPro Short S&P 500
SPXU
$522M
| $1.59M | ﹤0.01% |
+3,174
| New | +$1.59M |
|
185
Cheniere Energy
LNG
$51.5B
| $1.58M | ﹤0.01% |
25,948
+16,492
| +174% | +$1.01M |
|
186
Technology Select Sector SPDR Fund
XLK
$84.1B
| $1.58M | ﹤0.01% |
+17,220
| New | +$1.58M |
|
|
LGF.A
187
DELISTED
Lions Gate Entertainment Corp. Class A Voting Shares
LGF.A
| $1.57M | ﹤0.01% |
147,643
-48,440
| -25% | -$516K |
|
188
Advance Auto Parts
AAP
$3.63B
| $1.57M | ﹤0.01% |
9,817
-8,421
| -46% | -$1.35M |
|
|
DERM
189
DELISTED
Dermira, Inc.
DERM
| $1.54M | ﹤0.01% |
101,387
+96,182
| +1,848% | +$1.46M |
|
190
Teradata
TDC
$1.98B
| $1.53M | ﹤0.01% |
+57,042
| New | +$1.53M |
|
191
Berkshire Hathaway Class B
BRK.B
$1.08T
| $1.51M | ﹤0.01% |
+6,667
| New | +$1.51M |
|
|
RDS.B
192
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $1.5M | ﹤0.01% |
+24,972
| New | +$1.5M |
|
193
Air Lease Corp
AL
$7.12B
| $1.49M | ﹤0.01% |
+31,391
| New | +$1.49M |
|
194
Marriott International Class A Common Stock
MAR
$71.9B
| $1.47M | ﹤0.01% |
+9,718
| New | +$1.47M |
|
195
Shake Shack
SHAK
$4.04B
| $1.46M | ﹤0.01% |
+24,507
| New | +$1.46M |
|
196
Embraer
ERJ
$11.1B
| $1.45M | ﹤0.01% |
74,637
+54,699
| +274% | +$1.07M |
|
197
Zoom
ZM
$25B
| $1.44M | ﹤0.01% |
+21,139
| New | +$1.44M |
|
198
Corpay
CPAY
$22.4B
| $1.42M | ﹤0.01% |
+4,937
| New | +$1.42M |
|
|
MRTX
199
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.4M | ﹤0.01% |
10,866
+6,651
| +158% | +$857K |
|
200
Caesars Entertainment
CZR
$5.43B
| $1.4M | ﹤0.01% |
+23,470
| New | +$1.4M |
|