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 | |
|---|---|---|---|---|---|---|
901
Howard Hughes
HHH
$4.85B
| $364K | ﹤0.01% |
+3,761
| New | +$364K |
|
902
iShares US Financials ETF
IYF
$4.1B
| $364K | ﹤0.01% |
+4,210
| New | +$364K |
|
903
Hims & Hers Health
HIMS
$11.7B
| $363K | ﹤0.01% |
+55,473
| New | +$363K |
|
904
Nice
NICE
$8.81B
| $363K | ﹤0.01% |
+1,198
| New | +$363K |
|
|
PACW
905
DELISTED
PacWest Bancorp
PACW
| $363K | ﹤0.01% |
+8,045
| New | +$363K |
|
906
Cardiff Oncology
CRDF
$138M
| $361K | ﹤0.01% |
60,136
+55,676
| +1,248% | +$334K |
|
|
MAG
907
DELISTED
MAG Silver
MAG
| $360K | ﹤0.01% |
23,025
-13,876
| -38% | -$217K |
|
|
NKLA
908
DELISTED
Nikola Corporation Common Stock
NKLA
| $360K | ﹤0.01% |
1,218
-2,897
| -70% | -$856K |
|
909
Host Hotels & Resorts
HST
$12.2B
| $359K | ﹤0.01% |
+20,663
| New | +$359K |
|
910
Yelp
YELP
$2B
| $358K | ﹤0.01% |
9,885
-2,701
| -21% | -$97.8K |
|
|
HMHC
911
DELISTED
Houghton Mifflin Harcourt Company
HMHC
| $355K | ﹤0.01% |
+22,100
| New | +$355K |
|
912
GDS Holdings
GDS
$7.37B
| $354K | ﹤0.01% |
7,508
+6,620
| +745% | +$312K |
|
913
Heron Therapeutics
HRTX
$196M
| $354K | ﹤0.01% |
38,853
+36,847
| +1,837% | +$336K |
|
|
SIVB
914
DELISTED
SVB Financial Group
SIVB
| $352K | ﹤0.01% |
+519
| New | +$352K |
|
915
Aclaris Therapeutics
ACRS
$213M
| $351K | ﹤0.01% |
24,199
+19,956
| +470% | +$289K |
|
916
HF Sinclair
DINO
$9.68B
| $351K | ﹤0.01% |
10,730
-17,395
| -62% | -$569K |
|
|
FBRT
917
Franklin BSP Realty Trust
FBRT
$948M
| $347K | ﹤0.01% |
+23,259
| New | +$347K |
|
918
AdvanSix
ASIX
$586M
| $346K | ﹤0.01% |
+7,337
| New | +$346K |
|
919
WisdomTree Japan Hedged Equity Fund
DXJ
$3.84B
| $346K | ﹤0.01% |
5,539
+1,220
| +28% | +$76.2K |
|
920
EVgo
EVGO
$531M
| $346K | ﹤0.01% |
+34,828
| New | +$346K |
|
921
Lennox International
LII
$19.9B
| $346K | ﹤0.01% |
+1,067
| New | +$346K |
|
922
CMS Energy
CMS
$21.5B
| $344K | ﹤0.01% |
5,302
-6,536
| -55% | -$424K |
|
923
Aquestive Therapeutics
AQST
$599M
| $343K | ﹤0.01% |
+88,253
| New | +$343K |
|
924
Senseonics Holdings
SENS
$371M
| $343K | ﹤0.01% |
128,661
-20,084
| -14% | -$53.5K |
|
|
AHT
925
Ashford Hospitality Trust
AHT
$37.9M
| $342K | ﹤0.01% |
3,563
-33,482
| -90% | -$3.21M |
|