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 | |
|---|---|---|---|---|---|---|
3626
AAR Corp
AIR
$2.72B
| – | – |
-97
| Closed | -$4K |
|
|
AIV
3627
Aimco
AIV
$1.1B
| – | – |
0
| – | – |
|
3628
Arthur J. Gallagher & Co
AJG
$77.9B
| – | – |
-5,243
| Closed | -$342K |
|
|
ALEX
3629
Alexander & Baldwin
ALEX
$1.38B
| – | – |
-12,077
| Closed | -$283K |
|
3630
Allegiant Air
ALGT
$1.21B
| – | – |
-172
| Closed | -$23K |
|
3631
Alkermes
ALKS
$4.95B
| – | – |
-2,629
| Closed | -$108K |
|
3632
Allstate
ALL
$53.9B
| – | – |
0
| – | – |
|
3633
Allegion
ALLE
$14.4B
| – | – |
-86
| Closed | -$6K |
|
3634
Allot
ALLT
$388M
| $0 | ﹤0.01% |
122
-576
| -83% | – |
|
3635
Alnylam Pharmaceuticals
ALNY
$58.6B
| – | – |
0
| – | – |
|
3636
Allison Transmission
ALSN
$7.36B
| – | – |
0
| – | – |
|
3637
Altimmune
ALT
$325M
| – | – |
0
| – | – |
|
3638
Alto Ingredients
ALTO
$88.2M
| – | – |
-155
| Closed | – |
|
3639
AMC Networks
AMCX
$316M
| – | – |
-1,909
| Closed | -$118K |
|
3640
Advanced Micro Devices
AMD
$263B
| – | – |
0
| – | – |
|
3641
Ametek
AME
$42.6B
| – | – |
0
| – | – |
|
|
AMED
3642
DELISTED
Amedisys
AMED
| – | – |
0
| – | – |
|
3643
Amgen
AMGN
$153B
| – | – |
0
| – | – |
|
3644
American Homes 4 Rent
AMH
$12.9B
| – | – |
0
| – | – |
|