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 |
Microsoft
MSFT
|
+$101M |
| 2 |
NVIDIA
NVDA
|
+$66M |
| 3 |
Citigroup
C
|
+$51.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$42.7M |
| 5 |
SPDR Gold Trust
GLD
|
+$39.4M |
Top Sells
| 1 |
Apple
AAPL
|
+$411M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$64M |
| 3 |
Meta Platforms (Facebook)
META
|
+$39.8M |
| 4 |
iShares Core S&P 500 ETF
IVV
|
+$34.3M |
| 5 |
PayPal
PYPL
|
+$32.9M |
Sector Composition
| 1 | Technology | 17.4% |
| 2 | Financials | 12.04% |
| 3 | Consumer Discretionary | 10.17% |
| 4 | Healthcare | 8.63% |
| 5 | Industrials | 6.03% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
801
CenterPoint Energy
CNP
$25B
| $261K | ﹤0.01% |
+9,265
| New | +$261K |
|
|
OTLY
802
Oatly Group
OTLY
$528M
| $260K | ﹤0.01% |
4,958
-2,765
| -36% | -$145K |
|
803
NNN REIT
NNN
$8.17B
| $257K | ﹤0.01% |
+6,464
| New | +$257K |
|
804
JPMorgan Equity Premium Income ETF
JEPI
$41.5B
| $255K | ﹤0.01% |
+4,991
| New | +$255K |
|
805
Nabors Industries
NBR
$619M
| $255K | ﹤0.01% |
2,523
-754
| -23% | -$76.2K |
|
|
VLRS
806
Controladora Vuela Compañía de Aviación
VLRS
$717M
| $255K | ﹤0.01% |
36,519
+25,801
| +241% | +$180K |
|
|
BLU
807
DELISTED
BELLUS Health Inc.
BLU
| $255K | ﹤0.01% |
24,211
+12,034
| +99% | +$127K |
|
808
Trinity Industries
TRN
$2.31B
| $254K | ﹤0.01% |
+11,925
| New | +$254K |
|
809
i3 Verticals
IIIV
$744M
| $253K | ﹤0.01% |
+12,652
| New | +$253K |
|
810
Sensata Technologies
ST
$4.69B
| $253K | ﹤0.01% |
6,809
-6,791
| -50% | -$252K |
|
|
MYOV
811
DELISTED
Myovant Sciences Ltd.
MYOV
| $253K | ﹤0.01% |
+14,111
| New | +$253K |
|
812
Viper Energy
VNOM
$6.58B
| $252K | ﹤0.01% |
8,816
+6,432
| +270% | +$184K |
|
813
Invesco DB Energy Fund
DBE
$49M
| $251K | ﹤0.01% |
11,130
-5,680
| -34% | -$128K |
|
814
FIVE9
FIVN
$2.02B
| $251K | ﹤0.01% |
3,351
-9,640
| -74% | -$722K |
|
815
Nexstar Media Group
NXST
$6.25B
| $251K | ﹤0.01% |
1,509
+298
| +25% | +$49.6K |
|
816
Westrock Coffee
WEST
$519M
| $251K | ﹤0.01% |
+24,378
| New | +$251K |
|
817
Celldex Therapeutics
CLDX
$1.67B
| $250K | ﹤0.01% |
8,916
-7,630
| -46% | -$214K |
|
818
Denny's
DENN
$270M
| $250K | ﹤0.01% |
26,671
+11,042
| +71% | +$104K |
|
819
Microvast
MVST
$916M
| $250K | ﹤0.01% |
+138,236
| New | +$250K |
|
820
TaskUs
TASK
$1.56B
| $250K | ﹤0.01% |
+15,570
| New | +$250K |
|
821
Workhorse Group
WKHS
$18.3M
| $250K | ﹤0.01% |
350
+18
| +5% | +$12.9K |
|
|
LSI
822
DELISTED
Life Storage, Inc.
LSI
| $250K | ﹤0.01% |
2,264
+140
| +7% | +$15.5K |
|
823
ARK Web x.0 ETF
ARKW
$2.43B
| $249K | ﹤0.01% |
5,463
+5,363
| +5,363% | +$244K |
|
|
FENG
824
Phoenix New Media
FENG
$31.5M
| $249K | ﹤0.01% |
53,030
+29,341
| +124% | +$138K |
|
825
Gossamer Bio
GOSS
$787M
| $249K | ﹤0.01% |
20,788
+550
| +3% | +$6.59K |
|