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 | |
|---|---|---|---|---|---|---|
776
LifeMD
LFMD
$288M
| $578K | ﹤0.01% |
49,901
+400
| +0.8% | +$4.63K |
|
|
ASTR
777
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $578K | ﹤0.01% |
2,988
+1,155
| +63% | +$223K |
|
778
eHealth
EHTH
$119M
| $577K | ﹤0.01% |
9,702
+100
| +1% | +$5.95K |
|
779
Cheesecake Factory
CAKE
$2.99B
| $575K | ﹤0.01% |
10,733
-600
| -5% | -$32.1K |
|
|
SLCA
780
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $571K | ﹤0.01% |
40,992
-214
| -0.5% | -$2.98K |
|
|
HOLI
781
DELISTED
Hollsys Automation Technologies INTERNATIONAL, LTD. COMMON (British Virgin Island)
HOLI
| $569K | ﹤0.01% |
38,125
+12,863
| +51% | +$192K |
|
782
Xenon Pharmaceuticals
XENE
$2.89B
| $566K | ﹤0.01% |
30,607
+400
| +1% | +$7.4K |
|
|
LTHM
783
DELISTED
Livent Corporation
LTHM
| $565K | ﹤0.01% |
28,629
-181
| -0.6% | -$3.57K |
|
784
Direxion Daily Junior Gold Miners Index Bull 2X Shares
JNUG
$468M
| $564K | ﹤0.01% |
6,924
+88
| +1% | +$7.17K |
|
785
Construction Partners
ROAD
$6.78B
| $564K | ﹤0.01% |
17,939
-1,575
| -8% | -$49.5K |
|
786
Anavex Life Sciences
AVXL
$881M
| $561K | ﹤0.01% |
22,852
+2,942
| +15% | +$72.2K |
|
787
PagerDuty
PD
$1.55B
| $560K | ﹤0.01% |
13,215
+2,516
| +24% | +$107K |
|
788
Vanguard Mid-Cap Growth ETF
VOT
$17.7B
| $560K | ﹤0.01% |
2,370
| – | – |
|
789
LendingClub
LC
$1.89B
| $559K | ﹤0.01% |
31,921
| – | – |
|
790
Arcus Biosciences
RCUS
$1.22B
| $557K | ﹤0.01% |
20,237
+100
| +0.5% | +$2.75K |
|
791
Synaptics
SYNA
$2.73B
| $557K | ﹤0.01% |
3,629
| – | – |
|
792
MPLX
MPLX
$51.1B
| $555K | ﹤0.01% |
18,601
| – | – |
|
793
SBA Communications
SBAC
$20.6B
| $555K | ﹤0.01% |
1,736
+200
| +13% | +$63.9K |
|
794
Ameriprise Financial
AMP
$46.4B
| $554K | ﹤0.01% |
2,209
| – | – |
|
|
FST
795
DELISTED
FAST Acquisition Corp.
FST
| $554K | ﹤0.01% |
42,131
+828
| +2% | +$10.9K |
|
|
FLG
796
Flagstar Financial, Inc.
FLG
$5.35B
| $551K | ﹤0.01% |
16,222
-466
| -3% | -$15.8K |
|
797
Brinker International
EAT
$6.93B
| $550K | ﹤0.01% |
8,968
| – | – |
|
798
Peabody Energy
BTU
$2.25B
| $549K | ﹤0.01% |
67,071
| – | – |
|
799
Owens Corning
OC
$13B
| $548K | ﹤0.01% |
5,520
+300
| +6% | +$29.8K |
|
800
Petco
WOOF
$1.02B
| $548K | ﹤0.01% |
25,189
-5,909
| -19% | -$129K |
|