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 |
Invesco QQQ Trust
QQQ
|
$41.7M |
| 2 |
Mastercard
MA
|
$33.6M |
| 3 |
Alibaba
BABA
|
$33.4M |
| 4 |
Apple
AAPL
|
$27.9M |
| 5 |
Alphabet (Google) Class C
GOOG
|
$26M |
Top Sells
| 1 |
JPMorgan Chase
JPM
|
$60M |
| 2 |
TSMC
TSM
|
$49.5M |
| 3 |
iShares Silver Trust
SLV
|
$26M |
| 4 |
Amazon
AMZN
|
$25.2M |
| 5 |
Boeing
BA
|
$22.1M |
Sector Composition
| 1 | Consumer Discretionary | 23.12% |
| 2 | Technology | 13.05% |
| 3 | Healthcare | 11.53% |
| 4 | Industrials | 7.38% |
| 5 | Communication Services | 6.71% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
3976
Atkore
ATKR
$1.91B
| – | – |
-5
| Closed | – |
|
3977
Atlanticus Holdings
ATLC
$1.01B
| – | – |
0
| – | – |
|
3978
Atmos Energy
ATO
$26.5B
| – | – |
-1,008
| Closed | -$96K |
|
3979
AptarGroup
ATR
$8.91B
| – | – |
0
| – | – |
|
3980
Atossa Therapeutics
ATOS
$98.6M
| $0 | ﹤0.01% |
400
+287
| +254% | – |
|
3981
Atara Biotherapeutics
ATRA
$86.9M
| – | – |
-2,712
| Closed | -$35K |
|
3982
Astronics
ATRO
$1.3B
| – | – |
0
| – | – |
|
3983
American Vanguard Corp
AVD
$153M
| – | – |
0
| – | – |
|
3984
Avanos Medical
AVNS
$561M
| – | – |
-493
| Closed | -$16K |
|
3985
Avient
AVNT
$3.35B
| – | – |
0
| – | – |
|
3986
Avnet
AVT
$4.37B
| – | – |
-12,699
| Closed | -$328K |
|
3987
Avantor
AVTR
$8.87B
| – | – |
0
| – | – |
|
3988
Avery Dennison
AVY
$13B
| – | – |
0
| – | – |
|
3989
American States Water
AWR
$2.84B
| – | – |
0
| – | – |
|
3990
Aware
AWRE
$49.9M
| $0 | ﹤0.01% |
+219
| New | – |
|
3991
Axsome Therapeutics
AXSM
$6.04B
| $0 | ﹤0.01% |
6,622
-4,245
| -39% | – |
|
|
SBLX
3992
StableX Technologies, Inc. Common Stock
SBLX
$3.34M
| $0 | ﹤0.01% |
100
-17,484
| -99% | – |
|
|
AZEK
3993
DELISTED
The AZEK Co
AZEK
| – | – |
-435
| Closed | -$15K |
|