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 | |
|---|---|---|---|---|---|---|
226
Coterra Energy
CTRA
$18.2B
| $1.32M | 0.01% |
+55,390
| New | +$1.32M |
|
227
YPF
YPF
$12B
| $1.32M | 0.01% |
+96,981
| New | +$1.32M |
|
228
FibroGen
FGEN
$47.5M
| $1.31M | 0.01% |
838
-227
| -21% | -$355K |
|
229
Lam Research
LRCX
$129B
| $1.31M | 0.01% |
+75,560
| New | +$1.31M |
|
230
Live Nation Entertainment
LYV
$37.7B
| $1.3M | 0.01% |
26,867
+22,827
| +565% | +$1.11M |
|
231
Sociedad Química y Minera de Chile
SQM
$13.2B
| $1.3M | 0.01% |
26,994
-10,573
| -28% | -$508K |
|
|
SGI
232
Somnigroup International Inc.
SGI
$18.3B
| $1.29M | 0.01% |
107,564
+57,204
| +114% | +$687K |
|
233
Cognizant
CTSH
$35B
| $1.29M | 0.01% |
16,299
+2,402
| +17% | +$190K |
|
|
GSKY
234
DELISTED
GreenSky, Inc. Class A Common Stock
GSKY
| $1.28M | 0.01% |
+60,729
| New | +$1.28M |
|
235
ProShares Ultra Bloomberg Crude Oil
UCO
$352M
| $1.28M | 0.01% |
5,972
-1,678
| -22% | -$360K |
|
|
DNKN
236
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $1.28M | 0.01% |
+18,502
| New | +$1.28M |
|
237
Okta
OKTA
$16B
| $1.28M | 0.01% |
25,350
+9,095
| +56% | +$458K |
|
|
VAR
238
DELISTED
Varian Medical Systems, Inc.
VAR
| $1.27M | 0.01% |
+11,205
| New | +$1.27M |
|
239
McKesson
MCK
$85.6B
| $1.27M | 0.01% |
9,538
+9,438
| +9,438% | +$1.26M |
|
|
NEWR
240
DELISTED
New Relic, Inc.
NEWR
| $1.27M | 0.01% |
12,622
+10,358
| +458% | +$1.04M |
|
241
Nexstar Media Group
NXST
$6.34B
| $1.27M | 0.01% |
17,275
+12,906
| +295% | +$947K |
|
|
GRUB
242
DELISTED
Just Eat Takeaway.com N.V. American Depositary Shares
GRUB
| $1.26M | 0.01% |
+6,023
| New | +$1.26M |
|
243
Saia
SAIA
$8.3B
| $1.25M | ﹤0.01% |
15,497
+13,841
| +836% | +$1.12M |
|
|
MNDT
244
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.25M | ﹤0.01% |
81,249
-11,591
| -12% | -$178K |
|
|
BERY
245
DELISTED
Berry Global Group, Inc.
BERY
| $1.25M | ﹤0.01% |
+29,530
| New | +$1.25M |
|
246
Upbound Group
UPBD
$1.45B
| $1.23M | ﹤0.01% |
83,873
+67,339
| +407% | +$991K |
|
247
Camping World
CWH
$1.11B
| $1.23M | ﹤0.01% |
49,118
+43,844
| +831% | +$1.09M |
|
248
Ally Financial
ALLY
$12.8B
| $1.23M | ﹤0.01% |
46,636
+43,560
| +1,416% | +$1.14M |
|
|
WW
249
DELISTED
WW International
WW
| $1.22M | ﹤0.01% |
+12,069
| New | +$1.22M |
|
250
CME Group
CME
$94.4B
| $1.22M | ﹤0.01% |
7,427
+7,269
| +4,601% | +$1.19M |
|