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 |
Amazon
AMZN
|
$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
$57.4M |
| 4 |
Citigroup
C
|
$23.4M |
| 5 |
Goldman Sachs
GS
|
$23M |
Top Sells
| 1 |
Apple
AAPL
|
$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$42.2M |
| 4 |
Micron Technology
MU
|
$26.1M |
| 5 |
Adobe
ADBE
|
$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
176
Wolfspeed
WOLF
$194M
| $1.8M | 0.01% |
47,408
+25,234
| +114% | +$955K |
|
|
BBBY
177
Bed Bath & Beyond, Inc.
BBBY
$503M
| $1.77M | 0.01% |
77,488
+26,681
| +53% | +$610K |
|
178
Idexx Laboratories
IDXX
$51.2B
| $1.76M | 0.01% |
7,064
+6,202
| +719% | +$1.55M |
|
|
BERY
179
DELISTED
Berry Global Group, Inc.
BERY
| $1.75M | 0.01% |
39,299
+9,769
| +33% | +$434K |
|
180
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$29.6B
| $1.71M | 0.01% |
+14,910
| New | +$1.71M |
|
|
CZR
181
DELISTED
Caesars Entertainment Corporation
CZR
| $1.71M | 0.01% |
166,986
-43,645
| -21% | -$447K |
|
182
WisdomTree Japan Hedged Equity Fund
DXJ
$3.77B
| $1.69M | 0.01% |
29,213
+18,319
| +168% | +$1.06M |
|
183
Shopify
SHOP
$189B
| $1.69M | 0.01% |
+102,680
| New | +$1.69M |
|
184
Signet Jewelers
SIG
$3.73B
| $1.68M | 0.01% |
+25,521
| New | +$1.68M |
|
185
TechnipFMC
FTI
$16.3B
| $1.67M | 0.01% |
71,692
-16,134
| -18% | -$375K |
|
|
TWOU
186
DELISTED
2U, Inc.
TWOU
| $1.64M | 0.01% |
726
+547
| +306% | +$1.23M |
|
|
WP
187
DELISTED
Worldpay, Inc.
WP
| $1.64M | 0.01% |
16,179
-18,144
| -53% | -$1.84M |
|
188
Sony
SONY
$166B
| $1.63M | 0.01% |
134,240
+123,555
| +1,156% | +$1.5M |
|
189
Sarepta Therapeutics
SRPT
$1.93B
| $1.63M | 0.01% |
10,085
-6,835
| -40% | -$1.1M |
|
|
MNK
190
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $1.62M | 0.01% |
55,385
-27,801
| -33% | -$815K |
|
191
Whirlpool
WHR
$5.14B
| $1.62M | 0.01% |
+13,661
| New | +$1.62M |
|
192
Okta
OKTA
$15.8B
| $1.61M | 0.01% |
22,898
-2,452
| -10% | -$173K |
|
|
EVHC
193
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $1.61M | 0.01% |
35,156
+7,921
| +29% | +$362K |
|
|
CEO
194
DELISTED
CNOOC Limited
CEO
| $1.59M | 0.01% |
+8,054
| New | +$1.59M |
|
|
WWE
195
DELISTED
World Wrestling Entertainment
WWE
| $1.59M | 0.01% |
+16,402
| New | +$1.59M |
|
|
WRK
196
DELISTED
WestRock Company
WRK
| $1.57M | 0.01% |
29,344
+22,863
| +353% | +$1.22M |
|
|
NLSN
197
DELISTED
Nielsen Holdings plc
NLSN
| $1.57M | 0.01% |
56,602
+51,297
| +967% | +$1.42M |
|
198
Vanda Pharmaceuticals
VNDA
$274M
| $1.55M | 0.01% |
67,586
+65,389
| +2,976% | +$1.5M |
|
199
Alcoa
AA
$8.1B
| $1.54M | 0.01% |
38,172
+1,299
| +4% | +$52.5K |
|
200
Gen Digital
GEN
$18.2B
| $1.54M | 0.01% |
72,465
+48,387
| +201% | +$1.03M |
|