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 | |
|---|---|---|---|---|---|---|
226
Telecom Argentina
TEO
$3.67B
| $1.32M | ﹤0.01% |
+75,507
| New | +$1.32M |
|
|
RTN
227
DELISTED
Raytheon Company
RTN
| $1.3M | ﹤0.01% |
6,312
-10,173
| -62% | -$2.1M |
|
228
Lumen
LUMN
$4.87B
| $1.3M | ﹤0.01% |
61,279
+51,120
| +503% | +$1.08M |
|
229
Stellantis
STLA
$26.2B
| $1.29M | ﹤0.01% |
73,946
-51,426
| -41% | -$900K |
|
230
Pinduoduo
PDD
$177B
| $1.29M | ﹤0.01% |
+48,929
| New | +$1.29M |
|
231
Trip.com Group
TCOM
$47.6B
| $1.29M | ﹤0.01% |
34,599
-44,130
| -56% | -$1.64M |
|
232
Cars.com
CARS
$835M
| $1.28M | ﹤0.01% |
46,489
+23,592
| +103% | +$651K |
|
233
iShares MSCI South Korea ETF
EWY
$5.22B
| $1.28M | ﹤0.01% |
18,793
-30,585
| -62% | -$2.09M |
|
234
ProShares UltraShort S&P500
SDS
$442M
| $1.27M | ﹤0.01% |
+7,680
| New | +$1.27M |
|
235
Kohl's
KSS
$1.86B
| $1.27M | ﹤0.01% |
+17,044
| New | +$1.27M |
|
236
Direxion Daily MSCI Brazil Bull 2X Shares
BRZU
$133M
| $1.25M | ﹤0.01% |
1,904
+649
| +52% | +$424K |
|
237
Monster Beverage
MNST
$61B
| $1.24M | ﹤0.01% |
42,492
+16,718
| +65% | +$487K |
|
|
RESI
238
DELISTED
Front Yard Residential Corporation Common Stock
RESI
| $1.24M | ﹤0.01% |
114,078
+101,918
| +838% | +$1.11M |
|
|
LOGM
239
DELISTED
LogMein, Inc.
LOGM
| $1.24M | ﹤0.01% |
13,877
+6,546
| +89% | +$583K |
|
240
Dynavax Technologies
DVAX
$1.18B
| $1.24M | ﹤0.01% |
99,640
+91,992
| +1,203% | +$1.14M |
|
|
SODA
241
DELISTED
SodaStream International Ltd
SODA
| $1.23M | ﹤0.01% |
8,608
+5,476
| +175% | +$783K |
|
242
Ambac
AMBC
$422M
| $1.23M | ﹤0.01% |
60,198
+57,146
| +1,872% | +$1.17M |
|
|
MRO
243
DELISTED
Marathon Oil Corporation
MRO
| $1.23M | ﹤0.01% |
+52,621
| New | +$1.23M |
|
|
PXD
244
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.22M | ﹤0.01% |
+7,000
| New | +$1.22M |
|
|
CS
245
DELISTED
Credit Suisse Group
CS
| $1.22M | ﹤0.01% |
81,397
+3,202
| +4% | +$47.8K |
|
246
Cheesecake Factory
CAKE
$3.02B
| $1.21M | ﹤0.01% |
22,534
+1,155
| +5% | +$61.8K |
|
247
Carnival Corp
CCL
$42.8B
| $1.19M | ﹤0.01% |
18,711
-25,761
| -58% | -$1.64M |
|
248
Pacira BioSciences
PCRX
$1.19B
| $1.19M | ﹤0.01% |
24,183
+22,709
| +1,541% | +$1.12M |
|
249
Yum! Brands
YUM
$40.1B
| $1.19M | ﹤0.01% |
13,044
-23
| -0.2% | -$2.09K |
|
|
CLDR
250
DELISTED
Cloudera, Inc.
CLDR
| $1.17M | ﹤0.01% |
66,346
+32,140
| +94% | +$567K |
|