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 | |
|---|---|---|---|---|---|---|
1076
Loews
L
$19.9B
| $84K | ﹤0.01% |
1,757
-1,725
| -50% | -$82.5K |
|
|
MIC
1077
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $84K | ﹤0.01% |
2,011
-19,709
| -91% | -$823K |
|
|
GLOG
1078
DELISTED
GASLOG LTD
GLOG
| $84K | ﹤0.01% |
4,433
-862
| -16% | -$16.3K |
|
1079
American Woodmark
AMWD
$950M
| $83K | ﹤0.01% |
907
+879
| +3,139% | +$80.4K |
|
1080
Boot Barn
BOOT
$5.61B
| $83K | ﹤0.01% |
+4,024
| New | +$83K |
|
1081
iShares MSCI Hong Kong ETF
EWH
$728M
| $83K | ﹤0.01% |
+3,456
| New | +$83K |
|
1082
Lands' End
LE
$453M
| $83K | ﹤0.01% |
3,000
+813
| +37% | +$22.5K |
|
1083
Middleby
MIDD
$6.99B
| $83K | ﹤0.01% |
804
-2,075
| -72% | -$214K |
|
1084
NiSource
NI
$19.2B
| $83K | ﹤0.01% |
3,159
+2,396
| +314% | +$63K |
|
|
CDMO
1085
DELISTED
Avid Bioservices, Inc. Common Stock
CDMO
| $83K | ﹤0.01% |
21,290
+18,731
| +732% | +$73K |
|
1086
Fabrinet
FN
$13.3B
| $82K | ﹤0.01% |
2,247
-905
| -29% | -$33K |
|
1087
ICU Medical
ICUI
$3.3B
| $82K | ﹤0.01% |
282
+275
| +3,929% | +$80K |
|
|
MAG
1088
DELISTED
MAG Silver
MAG
| $82K | ﹤0.01% |
7,606
-1,804
| -19% | -$19.4K |
|
|
SA
1089
Seabridge Gold
SA
$1.8B
| $82K | ﹤0.01% |
7,401
-2,351
| -24% | -$26K |
|
1090
Direxion Daily Technology Bear 3x Shares
TECS
$51.9M
| $82K | ﹤0.01% |
+3
| New | +$82K |
|
|
VSM
1091
DELISTED
Versum Materials, Inc.
VSM
| $82K | ﹤0.01% |
+2,209
| New | +$82K |
|
1092
BOK Financial
BOKF
$7.02B
| $81K | ﹤0.01% |
862
+332
| +63% | +$31.2K |
|
1093
Jabil
JBL
$23.2B
| $81K | ﹤0.01% |
2,933
-3,654
| -55% | -$101K |
|
1094
Savara
SVRA
$662M
| $81K | ﹤0.01% |
7,229
+6,821
| +1,672% | +$76.4K |
|
|
QVCGA
1095
QVC Group, Inc. Series A Common Stock
QVCGA
$83.7M
| $81K | ﹤0.01% |
79
+33
| +72% | +$33.8K |
|
1096
Mitek Systems
MITK
$454M
| $80K | ﹤0.01% |
9,040
-7,090
| -44% | -$62.7K |
|
1097
Merit Medical Systems
MMSI
$5.26B
| $80K | ﹤0.01% |
1,581
-500
| -24% | -$25.3K |
|
|
NXGN
1098
DELISTED
NextGen Healthcare, Inc. Common Stock
NXGN
| $80K | ﹤0.01% |
4,106
+3,115
| +314% | +$60.7K |
|
|
RDS.A
1099
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $80K | ﹤0.01% |
1,157
-25,624
| -96% | -$1.77M |
|
|
WLL
1100
DELISTED
Whiting Petroleum Corporation
WLL
| $80K | ﹤0.01% |
+20
| New | +$80K |
|