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 |
Financial Select Sector SPDR Fund
XLF
|
$42.3M |
| 2 |
Shopify
SHOP
|
$37.4M |
| 3 |
Verizon
VZ
|
$34M |
| 4 |
iShares China Large-Cap ETF
FXI
|
$33M |
| 5 |
Merck
MRK
|
$28M |
Top Sells
| 1 |
AMC Entertainment Holdings
AMC
|
$38.3M |
| 2 |
Carnival Corp
CCL
|
$37.6M |
| 3 |
GE Aerospace
GE
|
$33M |
| 4 |
Advanced Micro Devices
AMD
|
$30.6M |
| 5 |
Micron Technology
MU
|
$28.3M |
Sector Composition
| 1 | Technology | 20.53% |
| 2 | Consumer Discretionary | 13.81% |
| 3 | Healthcare | 11.39% |
| 4 | Communication Services | 7.32% |
| 5 | Industrials | 6.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
4901
Aspen Aerogels
ASPN
$563M
| – | – | -11,568 | Closed | -$400K |
|
4902
AmeriServ Financial
ASRV
$49.2M
| – | – | -1,377 | Closed | -$5K |
|
4903
Asure Software
ASUR
$230M
| – | – | -331 | Closed | -$2K |
|
4904
ASE Group
ASX
$21.6B
| – | – | 0 | – | – |
|
4905
Autohome
ATHM
$3.42B
| – | – | 0 | – | – |
|
4906
ATI
ATI
$10.7B
| – | – | 0 | – | – |
|
4907
ATN International
ATNI
$259M
| – | – | -800 | Closed | -$37K |
|
4908
Actinium Pharmaceuticals
ATNM
$55.5M
| – | – | 0 | – | – |
|
4909
Atmos Energy
ATO
$26.7B
| – | – | 0 | – | – |
|
4910
Atomera
ATOM
$103M
| – | – | 0 | – | – |
|
4911
AtriCure
ATRC
$1.84B
| – | – | -81 | Closed | -$6K |
|
4912
Altice USA
ATUS
$1.1B
| – | – | 0 | – | – |
|
4913
Astria Therapeutics
ATXS
$349M
| – | – | 0 | – | – |
|
4914
AngloGold Ashanti
AU
$28.6B
| – | – | -136,253 | Closed | -$2.54M |
|
|
AUTL
4915
Autolus Therapeutics
AUTL
$399M
| – | – | 0 | – | – |
|
4916
AeroVironment
AVAV
$12.1B
| – | – | -7,911 | Closed | -$795K |
|