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
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
Boston Beer
SAM
$2.38B
| $1.76M | 0.01% |
5,880
+3,730
| +173% | +$1.12M |
|
177
Alcoa
AA
$8.1B
| $1.73M | 0.01% |
36,873
+30,608
| +489% | +$1.43M |
|
178
Golar LNG
GLNG
$4.49B
| $1.73M | 0.01% |
58,624
+53,763
| +1,106% | +$1.58M |
|
179
Consumer Discretionary Select Sector SPDR Fund
XLY
$23.6B
| $1.69M | 0.01% |
15,437
-73,502
| -83% | -$8.03M |
|
180
Clorox
CLX
$15.2B
| $1.68M | 0.01% |
12,426
+3,137
| +34% | +$424K |
|
181
Hilton Worldwide
HLT
$65.4B
| $1.68M | 0.01% |
+21,165
| New | +$1.68M |
|
182
Expedia Group
EXPE
$26.8B
| $1.65M | 0.01% |
13,751
-64,965
| -83% | -$7.8M |
|
|
GOOS
183
Canada Goose Holdings
GOOS
$1.27B
| $1.63M | 0.01% |
+27,667
| New | +$1.63M |
|
184
Cardinal Health
CAH
$35.7B
| $1.62M | 0.01% |
33,205
+11,119
| +50% | +$543K |
|
|
BMS
185
DELISTED
Bemis
BMS
| $1.62M | 0.01% |
38,380
+34,347
| +852% | +$1.45M |
|
186
Vulcan Materials
VMC
$38.6B
| $1.62M | 0.01% |
12,537
-4,081
| -25% | -$527K |
|
|
ETFC
187
DELISTED
E*Trade Financial Corporation
ETFC
| $1.61M | 0.01% |
+26,374
| New | +$1.61M |
|
188
Nektar Therapeutics
NKTR
$684M
| $1.61M | 0.01% |
2,192
+1,008
| +85% | +$738K |
|
189
PagSeguro Digital
PAGS
$2.7B
| $1.6M | 0.01% |
+57,759
| New | +$1.6M |
|
|
MLNX
190
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $1.6M | 0.01% |
+18,985
| New | +$1.6M |
|
191
Dollar Tree
DLTR
$20.4B
| $1.57M | 0.01% |
18,488
-8,509
| -32% | -$723K |
|
192
ProShares UltraShort QQQ
QID
$274M
| $1.57M | 0.01% |
+1,876
| New | +$1.57M |
|
193
Arista Networks
ANET
$177B
| $1.56M | 0.01% |
+97,120
| New | +$1.56M |
|
|
MNK
194
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $1.55M | 0.01% |
83,186
+8,945
| +12% | +$167K |
|
195
H&R Block
HRB
$6.88B
| $1.53M | 0.01% |
+67,171
| New | +$1.53M |
|
196
Rockwell Automation
ROK
$38.4B
| $1.52M | 0.01% |
+9,114
| New | +$1.52M |
|
197
Campbell Soup
CPB
$9.74B
| $1.51M | 0.01% |
37,338
-1,825
| -5% | -$74K |
|
198
Skechers
SKX
$9.5B
| $1.51M | 0.01% |
+50,292
| New | +$1.51M |
|
199
Mercado Libre
MELI
$123B
| $1.5M | 0.01% |
5,023
+4,523
| +905% | +$1.35M |
|
200
Ashland
ASH
$2.48B
| $1.5M | 0.01% |
19,140
+3,818
| +25% | +$298K |
|