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 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1026
KT
KT
$9.69B
| $64K | ﹤0.01% |
3,847
+263
| +7% | +$4.38K |
|
|
MGIC
1027
Magic Software Enterprises
MGIC
$952M
| $64K | ﹤0.01% |
+8,233
| New | +$64K |
|
|
BCOV
1028
DELISTED
Brightcove, Inc.
BCOV
| $64K | ﹤0.01% |
7,201
+7,137
| +11,152% | +$63.4K |
|
|
CRAY
1029
DELISTED
Cray, Inc.
CRAY
| $64K | ﹤0.01% |
+2,957
| New | +$64K |
|
1030
Gerdau
GGB
$6.25B
| $63K | ﹤0.01% |
23,079
+18,247
| +378% | +$49.8K |
|
1031
Lindsay Corp
LNN
$1.52B
| $63K | ﹤0.01% |
725
+351
| +94% | +$30.5K |
|
|
ATW
1032
DELISTED
Atwood Oceanics
ATW
| $63K | ﹤0.01% |
+6,635
| New | +$63K |
|
1033
ProShares UltraShort Energy
DUG
$10.4M
| $62K | ﹤0.01% |
74
+41
| +124% | +$34.4K |
|
1034
Equity Residential
EQR
$24.7B
| $62K | ﹤0.01% |
+1,009
| New | +$62K |
|
1035
Annaly Capital Management
NLY
$14.1B
| $62K | ﹤0.01% |
1,402
-26,027
| -95% | -$1.15M |
|
1036
Silicon Motion
SIMO
$3.01B
| $62K | ﹤0.01% |
1,333
-9,833
| -88% | -$457K |
|
1037
Sun Communities
SUI
$16.1B
| $62K | ﹤0.01% |
775
+769
| +12,817% | +$61.5K |
|
|
PMC
1038
DELISTED
PharMerica Corporation
PMC
| $62K | ﹤0.01% |
2,669
-341
| -11% | -$7.92K |
|
|
VIA
1039
DELISTED
Viacom Inc. Class A
VIA
| $62K | ﹤0.01% |
+1,283
| New | +$62K |
|
1040
Brink's
BCO
$4.79B
| $61K | ﹤0.01% |
+1,149
| New | +$61K |
|
|
FLNT
1041
Fluent
FLNT
$48.5M
| $61K | ﹤0.01% |
2,193
-2,481
| -53% | -$69K |
|
|
STML
1042
DELISTED
Stemline Therapeutics, Inc.
STML
| $61K | ﹤0.01% |
+7,155
| New | +$61K |
|
|
XCRA
1043
DELISTED
Xcerra Corporation
XCRA
| $61K | ﹤0.01% |
6,865
-10,446
| -60% | -$92.8K |
|
1044
Emcor
EME
$27.6B
| $60K | ﹤0.01% |
958
-4,453
| -82% | -$279K |
|
|
EEP
1045
DELISTED
Enbridge Energy Partners
EEP
| $59K | ﹤0.01% |
3,136
-14,116
| -82% | -$266K |
|
1046
Tidewater
TDW
$2.82B
| $59K | ﹤0.01% |
1,610
+914
| +131% | +$33.5K |
|
|
VNET
1047
VNET Group
VNET
$2.65B
| $59K | ﹤0.01% |
+10,784
| New | +$59K |
|
|
WEB
1048
DELISTED
Web.com Group, Inc.
WEB
| $59K | ﹤0.01% |
+3,075
| New | +$59K |
|
1049
Beazer Homes USA
BZH
$757M
| $58K | ﹤0.01% |
4,818
-4,760
| -50% | -$57.3K |
|
1050
ESCO Technologies
ESE
$5.47B
| $58K | ﹤0.01% |
1,013
-1,233
| -55% | -$70.6K |
|