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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
926
Ring Energy
REI
$211M
| $91K | ﹤0.01% |
6,410
+1,274
| +25% | +$18.1K |
|
927
Vanguard FTSE Pacific ETF
VPL
$8.01B
| $91K | ﹤0.01% |
1,261
+1,114
| +758% | +$80.4K |
|
|
FCE.A
928
DELISTED
Forest City Realty Trust, Inc.
FCE.A
| $91K | ﹤0.01% |
+4,508
| New | +$91K |
|
929
Dolby
DLB
$6.91B
| $90K | ﹤0.01% |
1,425
-1,081
| -43% | -$68.3K |
|
930
Liberty Global Class A
LBTYA
$4.07B
| $90K | ﹤0.01% |
+2,905
| New | +$90K |
|
931
Central Garden & Pet
CENT
$2.3B
| $89K | ﹤0.01% |
+2,593
| New | +$89K |
|
932
Korn Ferry
KFY
$3.93B
| $89K | ﹤0.01% |
+1,728
| New | +$89K |
|
933
W.R. Berkley
WRB
$28B
| $89K | ﹤0.01% |
4,161
+1,032
| +33% | +$22.1K |
|
|
SWCH
934
DELISTED
Switch, Inc. Class A Common Stock
SWCH
| $89K | ﹤0.01% |
+5,634
| New | +$89K |
|
935
Ethan Allen Interiors
ETD
$753M
| $88K | ﹤0.01% |
3,851
+3,673
| +2,063% | +$83.9K |
|
936
Permian Resources
PR
$9.8B
| $88K | ﹤0.01% |
4,813
+679
| +16% | +$12.4K |
|
937
Ventas
VTR
$31.6B
| $88K | ﹤0.01% |
1,784
-814
| -31% | -$40.2K |
|
|
VRN
938
DELISTED
Veren
VRN
| $88K | ﹤0.01% |
12,951
+3,081
| +31% | +$20.9K |
|
939
First Financial Bankshares
FFIN
$5.13B
| $87K | ﹤0.01% |
3,766
+1,460
| +63% | +$33.7K |
|
940
Viper Energy
VNOM
$6.58B
| $87K | ﹤0.01% |
3,442
-8,090
| -70% | -$204K |
|
|
KDNY
941
DELISTED
Chinook Therapeutics, Inc. Common Stock
KDNY
| $87K | ﹤0.01% |
1,877
+1,041
| +125% | +$48.3K |
|
|
GLOG
942
DELISTED
GASLOG LTD
GLOG
| $87K | ﹤0.01% |
+5,295
| New | +$87K |
|
943
Aurinia Pharmaceuticals
AUPH
$1.68B
| $86K | ﹤0.01% |
16,606
+13,533
| +440% | +$70.1K |
|
944
iShares US Transportation ETF
IYT
$611M
| $86K | ﹤0.01% |
1,852
-18,864
| -91% | -$876K |
|
945
Magnachip Semiconductor
MX
$110M
| $86K | ﹤0.01% |
+9,062
| New | +$86K |
|
946
Shake Shack
SHAK
$4.18B
| $86K | ﹤0.01% |
+2,085
| New | +$86K |
|
947
Morningstar
MORN
$10.8B
| $85K | ﹤0.01% |
+894
| New | +$85K |
|
|
PRMW
948
DELISTED
Primo Water Corporation
PRMW
| $85K | ﹤0.01% |
+5,790
| New | +$85K |
|
949
Esperion Therapeutics
ESPR
$563M
| $84K | ﹤0.01% |
+1,162
| New | +$84K |
|
950
Rollins
ROL
$28.2B
| $84K | ﹤0.01% |
+3,717
| New | +$84K |
|