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 |
Amazon
AMZN
|
+$144M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$68.7M |
| 3 |
AT&T
T
|
+$45.5M |
| 4 |
Meta Platforms (Facebook)
META
|
+$38M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$35.4M |
Top Sells
| 1 |
Microsoft
MSFT
|
+$94.2M |
| 2 |
Citigroup
C
|
+$62.3M |
| 3 |
JPMorgan Chase
JPM
|
+$56.2M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.8M |
| 5 |
SPDR Gold Trust
GLD
|
+$44.4M |
Sector Composition
| 1 | Consumer Discretionary | 16.85% |
| 2 | Technology | 15.5% |
| 3 | Communication Services | 10.53% |
| 4 | Healthcare | 8.8% |
| 5 | Consumer Staples | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
876
MillerKnoll
MLKN
$1.44B
| $157K | ﹤0.01% |
+7,493
| New | +$157K |
|
877
Snowflake
SNOW
$76.1B
| $157K | ﹤0.01% |
1,100
| – | – |
|
878
Schwab Emerging Markets Equity ETF
SCHE
$11.2B
| $156K | ﹤0.01% |
+6,600
| New | +$156K |
|
|
SLGC
879
DELISTED
SomaLogic, Inc. Class A Common Stock
SLGC
| $156K | ﹤0.01% |
62,259
-29,105
| -32% | -$72.9K |
|
880
Crescent Energy
CRGY
$2.24B
| $155K | ﹤0.01% |
13,007
+4,704
| +57% | +$56.1K |
|
881
PDS Biotechnology
PDSB
$55.5M
| $154K | ﹤0.01% |
+11,724
| New | +$154K |
|
882
Textron
TXT
$14.7B
| $154K | ﹤0.01% |
+2,189
| New | +$154K |
|
883
Petco
WOOF
$1.03B
| $154K | ﹤0.01% |
+16,330
| New | +$154K |
|
884
US Global Jets ETF
JETS
$834M
| $153K | ﹤0.01% |
9,015
-12,835
| -59% | -$218K |
|
885
Pitney Bowes
PBI
$1.97B
| $153K | ﹤0.01% |
40,439
-659
| -2% | -$2.49K |
|
886
Allstate
ALL
$53.4B
| $152K | ﹤0.01% |
1,127
-5,322
| -83% | -$718K |
|
887
Direxion Daily Real Estate Bear 3X Shares
DRV
$40.9M
| $152K | ﹤0.01% |
2,830
-7,627
| -73% | -$410K |
|
888
Sweetgreen
SG
$1.03B
| $151K | ﹤0.01% |
17,734
+13,583
| +327% | +$116K |
|
|
CMBT
889
CMB.TECH NV
CMBT
$2.72B
| $151K | ﹤0.01% |
+8,882
| New | +$151K |
|
890
Expeditors International
EXPD
$16.7B
| $150K | ﹤0.01% |
+1,453
| New | +$150K |
|
891
Immunovant
IMVT
$2.93B
| $150K | ﹤0.01% |
8,492
-1,085
| -11% | -$19.2K |
|
892
Nordic American Tanker
NAT
$692M
| $150K | ﹤0.01% |
49,305
-150,722
| -75% | -$459K |
|
893
Taboola.com
TBLA
$1.01B
| $150K | ﹤0.01% |
48,910
+31,336
| +178% | +$96.1K |
|
|
STER
894
DELISTED
Sterling Check Corp. Common Stock
STER
| $150K | ﹤0.01% |
9,740
+8,466
| +665% | +$130K |
|
895
Danaos Corp
DAC
$1.74B
| $149K | ﹤0.01% |
2,848
+2,425
| +573% | +$127K |
|
896
Vanguard Value ETF
VTV
$146B
| $148K | ﹤0.01% |
1,060
-737
| -41% | -$103K |
|
897
ProShares UltraShort FTSE Europe
EPV
$15.7M
| $147K | ﹤0.01% |
2,314
+2,122
| +1,105% | +$135K |
|
898
Fiverr
FVRR
$878M
| $147K | ﹤0.01% |
5,054
-21,546
| -81% | -$627K |
|
899
Viridian Therapeutics
VRDN
$1.6B
| $147K | ﹤0.01% |
5,061
-6,009
| -54% | -$175K |
|
|
ALTU
900
DELISTED
Altitude Acquisition Corp. Class A Common Stock
ALTU
| $147K | ﹤0.01% |
14,867
+14,866
| +1,486,600% | +$147K |
|