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 | +$168M | |
| 2 | +$141M | |
| 3 | +$121M | |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| 1 | +$174M | |
| 2 | +$87.7M | |
| 3 | +$62.2M | |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| 1 | Technology | 28.63% |
| 2 | Communication Services | 10.32% |
| 3 | Consumer Discretionary | 9.84% |
| 4 | Healthcare | 9.22% |
| 5 | Industrials | 4.62% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
AES
AES
$10.5B
| $2.57M | 0.08% |
182,416
-136,639
|
|
||
177
ProShares UltraPro Short S&P 500
SPXU
$509M
| $2.56M | 0.08% |
45,074
+8,454
|
|
||
|
MPT
178
Medical Properties Trust
MPT
$2.97B
| $2.53M | 0.08% |
547,206
-23,279
|
|
||
179
Citigroup
C
$238B
| $2.53M | 0.08% |
+22,325
|
|
||
180
Stellantis
STLA
$19.9B
| $2.53M | 0.08% |
356,788
+21,646
|
|
||
181
Frontline
FRO
$8.7B
| $2.53M | 0.08% |
+72,539
|
|
||
182
TPG
TPG
$6.9B
| $2.49M | 0.08% |
+61,422
|
|
||
183
Coherent
COHR
$75.3B
| $2.49M | 0.08% |
10,444
-33,767
|
|
||
184
McDonald's
MCD
$202B
| $2.48M | 0.08% |
+7,988
|
|
||
|
EH
185
EHang Holdings
EH
$503M
| $2.48M | 0.08% |
255,363
-54,704
|
|
||
186
AeroVironment
AVAV
$8.63B
| $2.47M | 0.08% |
13,491
+9,493
|
|
||
187
Roivant Sciences
ROIV
$21.6B
| $2.44M | 0.08% |
88,035
-55,862
|
|
||
188
Noble Corp
NE
$7.49B
| $2.43M | 0.08% |
49,497
-18,376
|
|
||
189
Peloton Interactive
PTON
$2.4B
| $2.41M | 0.07% |
562,779
+467,871
|
|
||
190
Trip.com Group
TCOM
$29.3B
| $2.39M | 0.07% |
48,072
+38,804
|
|
||
191
Symbotic
SYM
$5.3B
| $2.39M | 0.07% |
44,932
-4,675
|
|
||
192
FedEx
FDX
$80.7B
| $2.36M | 0.07% |
6,624
-30,137
|
|
||
193
Ametek
AME
$52.1B
| $2.34M | 0.07% |
10,908
+5,964
|
|
||
194
AngloGold Ashanti
AU
$43.6B
| $2.33M | 0.07% |
+23,983
|
|
||
195
Realty Income
O
$58.5B
| $2.31M | 0.07% |
+37,812
|
|
||
196
Air Products & Chemicals
APD
$62.7B
| $2.31M | 0.07% |
7,958
+3,394
|
|
||
197
AB InBev
BUD
$160B
| $2.31M | 0.07% |
+33,295
|
|
||
198
PACS Group
PACS
$5.74B
| $2.27M | 0.07% |
+70,720
|
|
||
199
Caesars Entertainment
CZR
$6.01B
| $2.26M | 0.07% |
+85,659
|
|
||
200
Mobileye
MBLY
$7.87B
| $2.26M | 0.07% |
329,323
+261,711
|
|