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 |
Alibaba
BABA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$97.6M |
| 3 |
Walt Disney
DIS
|
+$73.4M |
| 4 |
Citigroup
C
|
+$45.8M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.5M |
Top Sells
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$149M |
| 2 |
Amazon
AMZN
|
+$107M |
| 3 |
SPDR Gold Trust
GLD
|
+$58.6M |
| 4 |
Coinbase
COIN
|
+$56.5M |
| 5 |
NVIDIA
NVDA
|
+$48.2M |
Sector Composition
| 1 | Technology | 16.06% |
| 2 | Consumer Discretionary | 14.45% |
| 3 | Communication Services | 10.03% |
| 4 | Financials | 9.44% |
| 5 | Healthcare | 9.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1026
Champion Homes, Inc.
SKY
$4.22B
| $161K | ﹤0.01% |
2,176
-7,047
| -76% | -$521K |
|
1027
Sandstorm Gold
SAND
$3.46B
| $160K | ﹤0.01% |
+31,824
| New | +$160K |
|
1028
Tarsus Pharmaceuticals
TARS
$2.08B
| $160K | ﹤0.01% |
+7,918
| New | +$160K |
|
|
DADA
1029
DELISTED
Dada Nexus
DADA
| $159K | ﹤0.01% |
48,068
+11,172
| +30% | +$37K |
|
1030
Integral Ad Science
IAS
$1.4B
| $159K | ﹤0.01% |
11,070
+2,542
| +30% | +$36.5K |
|
1031
Medpace
MEDP
$13.8B
| $159K | ﹤0.01% |
+520
| New | +$159K |
|
1032
MACOM Technology Solutions
MTSI
$9.82B
| $159K | ﹤0.01% |
1,712
-2,712
| -61% | -$252K |
|
1033
Mammoth Energy Services
TUSK
$114M
| $159K | ﹤0.01% |
35,792
+29,296
| +451% | +$130K |
|
1034
US Commodity Index
USCI
$264M
| $159K | ﹤0.01% |
2,828
+1,093
| +63% | +$61.5K |
|
|
SLCA
1035
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $159K | ﹤0.01% |
14,103
+321
| +2% | +$3.62K |
|
1036
LSB Industries
LXU
$576M
| $158K | ﹤0.01% |
+17,070
| New | +$158K |
|
1037
WisdomTree Emerging Markets High Dividend Fund
DEM
$3.18B
| $157K | ﹤0.01% |
+3,872
| New | +$157K |
|
1038
DTE Energy
DTE
$28.4B
| $157K | ﹤0.01% |
1,429
-13,813
| -91% | -$1.52M |
|
1039
Stitch Fix
SFIX
$714M
| $157K | ﹤0.01% |
44,107
-24,470
| -36% | -$87.1K |
|
|
ATSG
1040
DELISTED
Air Transport Services Group, Inc.
ATSG
| $157K | ﹤0.01% |
8,958
+4,950
| +124% | +$86.8K |
|
1041
Core Laboratories
CLB
$581M
| $156K | ﹤0.01% |
8,834
+3,221
| +57% | +$56.9K |
|
1042
Warrior Met Coal
HCC
$3.04B
| $155K | ﹤0.01% |
+2,550
| New | +$155K |
|
1043
Direxion Daily S&P Biotech Bull 3X Shares
LABU
$695M
| $155K | ﹤0.01% |
1,275
-11,189
| -90% | -$1.36M |
|
1044
Microvast
MVST
$1.06B
| $155K | ﹤0.01% |
111,116
+26,476
| +31% | +$36.9K |
|
|
UMH
1045
UMH Properties
UMH
$1.29B
| $155K | ﹤0.01% |
+10,162
| New | +$155K |
|
|
SRC
1046
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $155K | ﹤0.01% |
3,570
+3,446
| +2,779% | +$150K |
|
|
SOL
1047
Emeren Group
SOL
$96.5M
| $154K | ﹤0.01% |
56,458
+11,247
| +25% | +$30.7K |
|
1048
Xperi
XPER
$279M
| $154K | ﹤0.01% |
+14,005
| New | +$154K |
|
1049
Endava
DAVA
$537M
| $153K | ﹤0.01% |
1,973
-2,155
| -52% | -$167K |
|
1050
Steven Madden
SHOO
$2.26B
| $153K | ﹤0.01% |
+3,664
| New | +$153K |
|