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 |
Energy Select Sector SPDR Fund
XLE
|
+$93.9M |
| 2 |
Pfizer
PFE
|
+$89.5M |
| 3 |
Boeing
BA
|
+$66.7M |
| 4 |
Intel
INTC
|
+$60.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$52.5M |
Top Sells
| 1 |
NVIDIA
NVDA
|
+$146M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$109M |
| 3 |
Alibaba
BABA
|
+$81.8M |
| 4 |
Walt Disney
DIS
|
+$80.2M |
| 5 |
Citigroup
C
|
+$55.3M |
Sector Composition
| 1 | Technology | 19.03% |
| 2 | Healthcare | 13.86% |
| 3 | Consumer Discretionary | 12.44% |
| 4 | Industrials | 8.48% |
| 5 | Communication Services | 7.95% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
226
St. Joe Company
JOE
$2.93B
| $2.79M | ﹤0.01% |
48,144
+29,285
| +155% | +$1.7M |
|
227
CME Group
CME
$94.3B
| $2.78M | ﹤0.01% |
12,915
-20,882
| -62% | -$4.49M |
|
228
Etsy
ETSY
$6.44B
| $2.75M | ﹤0.01% |
+40,014
| New | +$2.75M |
|
229
Spirit AeroSystems
SPR
$4.52B
| $2.71M | ﹤0.01% |
+75,017
| New | +$2.71M |
|
230
The Communication Services Select Sector SPDR Fund
XLC
$27.2B
| $2.71M | ﹤0.01% |
+33,132
| New | +$2.71M |
|
|
EXE
231
Expand Energy Corp
EXE
$23.5B
| $2.71M | ﹤0.01% |
+30,456
| New | +$2.71M |
|
232
Wynn Resorts
WYNN
$13.5B
| $2.7M | ﹤0.01% |
+26,415
| New | +$2.7M |
|
|
FLG
233
Flagstar Financial
FLG
$5.07B
| $2.69M | ﹤0.01% |
+278,074
| New | +$2.69M |
|
234
XPO
XPO
$15.4B
| $2.68M | ﹤0.01% |
+21,996
| New | +$2.68M |
|
235
Moderna
MRNA
$9.82B
| $2.65M | ﹤0.01% |
+24,885
| New | +$2.65M |
|
236
iShares MSCI ACWI ETF
ACWI
$22.8B
| $2.64M | ﹤0.01% |
24,011
+23,025
| +2,335% | +$2.54M |
|
|
GTM
237
ZoomInfo Technologies
GTM
$3.77B
| $2.64M | ﹤0.01% |
164,383
+61,135
| +59% | +$980K |
|
238
Affirm
AFRM
$30B
| $2.63M | ﹤0.01% |
+70,561
| New | +$2.63M |
|
|
MDRX
239
DELISTED
Veradigm Inc. Common Stock
MDRX
| $2.63M | ﹤0.01% |
341,139
+330,836
| +3,211% | +$2.55M |
|
240
iShares US Home Construction ETF
ITB
$3.26B
| $2.59M | ﹤0.01% |
22,395
+6,040
| +37% | +$699K |
|
241
Organon & Co
OGN
$2.72B
| $2.56M | ﹤0.01% |
136,418
+6,323
| +5% | +$119K |
|
242
Darling Ingredients
DAR
$5.05B
| $2.56M | ﹤0.01% |
55,111
+54,992
| +46,212% | +$2.56M |
|
243
Ventas
VTR
$30.5B
| $2.55M | ﹤0.01% |
58,490
+6,630
| +13% | +$289K |
|
244
Microchip Technology
MCHP
$35.2B
| $2.49M | ﹤0.01% |
+27,804
| New | +$2.49M |
|
245
Lightspeed Commerce
LSPD
$1.71B
| $2.49M | ﹤0.01% |
177,260
+13,662
| +8% | +$192K |
|
246
Caterpillar
CAT
$219B
| $2.48M | ﹤0.01% |
+6,779
| New | +$2.48M |
|
247
Reddit
RDDT
$49.5B
| $2.47M | ﹤0.01% |
+50,033
| New | +$2.47M |
|
248
Sensata Technologies
ST
$4.55B
| $2.46M | ﹤0.01% |
67,013
+43,418
| +184% | +$1.6M |
|
249
Cloudflare
NET
$78.7B
| $2.46M | ﹤0.01% |
+25,424
| New | +$2.46M |
|
250
Allstate
ALL
$54.3B
| $2.45M | ﹤0.01% |
14,178
-27,030
| -66% | -$4.67M |
|