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 |
Apple
AAPL
|
+$35.2M |
| 2 |
Micron Technology
MU
|
+$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$29.5M |
| 4 |
NVIDIA
NVDA
|
+$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$33.4M |
| 3 |
Tesla
TSLA
|
+$19.8M |
| 4 |
Netflix
NFLX
|
+$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
+$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
GPL
1726
DELISTED
Great Panther Mining Limited
GPL
| $8K | ﹤0.01% |
730
+10
| +1% | +$110 |
|
|
ANH
1727
DELISTED
Anworth Mortgage Asset Corporation
ANH
| $8K | ﹤0.01% |
1,732
-3,441
| -67% | -$15.9K |
|
|
KONA
1728
DELISTED
Kona Grill, Inc.
KONA
| $8K | ﹤0.01% |
+3,659
| New | +$8K |
|
|
CHU
1729
DELISTED
China Unicom (HONG KONG) Limited
CHU
| $8K | ﹤0.01% |
673
+589
| +701% | +$7K |
|
|
NSU
1730
DELISTED
Nevsun Resources Ltd.
NSU
| $8K | ﹤0.01% |
+2,495
| New | +$8K |
|
1731
Artisan Partners
APAM
$3.27B
| $7K | ﹤0.01% |
241
-29
| -11% | -$842 |
|
1732
Ardelyx
ARDX
$1.59B
| $7K | ﹤0.01% |
1,933
+1,832
| +1,814% | +$6.63K |
|
1733
ProShares UltraShort NASDAQ Biotechnology
BIS
$2.37M
| $7K | ﹤0.01% |
90
-3,795
| -98% | -$295K |
|
1734
CMS Energy
CMS
$21.5B
| $7K | ﹤0.01% |
+155
| New | +$7K |
|
1735
Denny's
DENN
$264M
| $7K | ﹤0.01% |
459
-194
| -30% | -$2.96K |
|
1736
Energy Focus
EFOI
$13.4M
| $7K | ﹤0.01% |
113
-38
| -25% | -$2.35K |
|
1737
Gold Fields
GFI
$33.7B
| $7K | ﹤0.01% |
2,041
-117
| -5% | -$401 |
|
1738
FerroAtlántica
GSM
$773M
| $7K | ﹤0.01% |
828
-93,232
| -99% | -$788K |
|
1739
Gran Tierra Energy
GTE
$136M
| $7K | ﹤0.01% |
205
-150
| -42% | -$5.12K |
|
1740
Hudbay
HBM
$5.35B
| $7K | ﹤0.01% |
+1,413
| New | +$7K |
|
1741
Harmony Gold Mining
HMY
$9.34B
| $7K | ﹤0.01% |
5,108
+465
| +10% | +$637 |
|
1742
Hallador Energy
HNRG
$763M
| $7K | ﹤0.01% |
+981
| New | +$7K |
|
1743
Imunon
IMNN
$14.5M
| $7K | ﹤0.01% |
14
-7
| -33% | -$3.5K |
|
1744
KB Financial Group
KB
$31.1B
| $7K | ﹤0.01% |
+167
| New | +$7K |
|
1745
Navigator Holdings
NVGS
$1.11B
| $7K | ﹤0.01% |
556
-8,121
| -94% | -$102K |
|
1746
Outfront Media
OUT
$3.16B
| $7K | ﹤0.01% |
+386
| New | +$7K |
|
1747
Sabesp
SBS
$16B
| $7K | ﹤0.01% |
+1,265
| New | +$7K |
|
1748
Stepan Co
SCL
$1.09B
| $7K | ﹤0.01% |
+100
| New | +$7K |
|
|
SOL
1749
Emeren Group
SOL
$96.5M
| $7K | ﹤0.01% |
3,021
-476
| -14% | -$1.1K |
|
1750
Tennant Co
TNC
$1.5B
| $7K | ﹤0.01% |
+98
| New | +$7K |
|