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 |
Advanced Micro Devices
AMD
|
$17.7M |
| 2 |
iShares MSCI EAFE ETF
EFA
|
$10.1M |
| 3 |
NIO
NIO
|
$7.66M |
| 4 |
Alibaba
BABA
|
$7.54M |
| 5 |
Micron Technology
MU
|
$6.73M |
Top Sells
| 1 |
NVIDIA
NVDA
|
$101M |
| 2 |
SPDR Gold Trust
GLD
|
$15.2M |
| 3 |
Amazon
AMZN
|
$9.5M |
| 4 |
SPDR S&P 500 ETF Trust
SPY
|
$8.76M |
| 5 |
Technology Select Sector SPDR Fund
XLK
|
$7.41M |
Sector Composition
| 1 | Technology | 18.66% |
| 2 | Consumer Discretionary | 14.99% |
| 3 | Communication Services | 10.06% |
| 4 | Healthcare | 9.68% |
| 5 | Financials | 9.59% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
651
American International
AIG
$43.9B
| $785K | ﹤0.01% |
16,267
+710
| +5% | +$34.3K |
|
652
Leslie's
LESL
$64.6M
| $780K | ﹤0.01% |
28,210
-300
| -1% | -$8.3K |
|
653
ProShares Ultra Technology
ROM
$770M
| $776K | ﹤0.01% |
16,118
| – | – |
|
654
JPMorgan Chase
JPM
$809B
| $775K | ﹤0.01% |
+4,940
| New | +$775K |
|
655
Nano X Imaging
NNOX
$236M
| $775K | ﹤0.01% |
24,425
-323
| -1% | -$10.2K |
|
|
DM
656
DELISTED
Desktop Metal, Inc.
DM
| $774K | ﹤0.01% |
7,032
-519
| -7% | -$57.1K |
|
657
Eastman Chemical
EMN
$7.93B
| $773K | ﹤0.01% |
6,619
| – | – |
|
|
MAG
658
DELISTED
MAG Silver
MAG
| $773K | ﹤0.01% |
36,901
-100
| -0.3% | -$2.1K |
|
659
FuelCell Energy
FCEL
$92.3M
| $772K | ﹤0.01% |
2,995
+412
| +16% | +$106K |
|
|
LSI
660
DELISTED
Life Storage, Inc.
LSI
| $769K | ﹤0.01% |
7,136
| – | – |
|
|
Y
661
DELISTED
Alleghany Corporation
Y
| $767K | ﹤0.01% |
1,133
+100
| +10% | +$67.7K |
|
662
Sabre
SABR
$675M
| $764K | ﹤0.01% |
60,750
-1,757
| -3% | -$22.1K |
|
663
Century Communities
CCS
$2.07B
| $761K | ﹤0.01% |
11,342
| – | – |
|
664
Ternium
TX
$6.79B
| $761K | ﹤0.01% |
19,609
-40
| -0.2% | -$1.55K |
|
665
United Natural Foods
UNFI
$1.75B
| $758K | ﹤0.01% |
20,566
-1,468
| -7% | -$54.1K |
|
666
Vanguard Consumer Discretionary ETF
VCR
$6.52B
| $754K | ﹤0.01% |
2,390
| – | – |
|
|
NUVA
667
DELISTED
NuVasive, Inc.
NUVA
| $751K | ﹤0.01% |
11,082
-100
| -0.9% | -$6.78K |
|
668
Textron
TXT
$14.5B
| $749K | ﹤0.01% |
10,848
+15
| +0.1% | +$1.04K |
|
|
SRG
669
Seritage Growth Properties
SRG
$211M
| $748K | ﹤0.01% |
41,067
| – | – |
|
670
Liberty Global Class C
LBTYK
$4.12B
| $747K | ﹤0.01% |
27,392
+4,054
| +17% | +$111K |
|
671
Vuzix
VUZI
$188M
| $746K | ﹤0.01% |
41,157
-7,334
| -15% | -$133K |
|
672
YPF
YPF
$12.1B
| $744K | ﹤0.01% |
162,161
| – | – |
|
|
MMAT
673
DELISTED
Meta Materials Inc. Common Stock
MMAT
| $744K | ﹤0.01% |
1,021
+897
| +723% | +$654K |
|
|
DNMR
674
DELISTED
Danimer Scientific, Inc.
DNMR
| $743K | ﹤0.01% |
759
+76
| +11% | +$74.4K |
|
|
SWN
675
DELISTED
Southwestern Energy Company
SWN
| $737K | ﹤0.01% |
131,213
-16,202
| -11% | -$91K |
|