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 | |
|---|---|---|---|---|---|---|
|
WPX
876
DELISTED
WPX Energy, Inc.
WPX
| $109K | ﹤0.01% |
7,376
-2,631
| -26% | -$38.9K |
|
|
PEI
877
DELISTED
Pennsylvania Real Estate Investment Trust
PEI
| $109K | ﹤0.01% |
757
-78
| -9% | -$11.2K |
|
878
Bright Horizons
BFAM
$6.49B
| $108K | ﹤0.01% |
+1,089
| New | +$108K |
|
879
ProShares UltraPro Short Dow 30
SDOW
$168M
| $107K | ﹤0.01% |
+86
| New | +$107K |
|
880
Bank OZK
OZK
$5.91B
| $105K | ﹤0.01% |
2,188
-7,892
| -78% | -$379K |
|
|
SA
881
Seabridge Gold
SA
$1.9B
| $105K | ﹤0.01% |
9,752
+5,170
| +113% | +$55.7K |
|
882
Banco Santander
SAN
$150B
| $105K | ﹤0.01% |
+16,847
| New | +$105K |
|
883
Silicon Motion
SIMO
$3.03B
| $105K | ﹤0.01% |
+2,200
| New | +$105K |
|
|
AEGN
884
DELISTED
Aegion Corp
AEGN
| $105K | ﹤0.01% |
4,616
-6,530
| -59% | -$149K |
|
885
Noodles & Co
NDLS
$30.1M
| $104K | ﹤0.01% |
13,810
+13,083
| +1,800% | +$98.5K |
|
886
iShares Gold Trust
IAU
$53.4B
| $103K | ﹤0.01% |
4,058
-74
| -2% | -$1.88K |
|
|
ACHN
887
DELISTED
Achillion Pharmaceuticals, Inc.
ACHN
| $103K | ﹤0.01% |
27,963
+24,330
| +670% | +$89.6K |
|
|
BDSI
888
DELISTED
BioDelivery Sciences International, Inc.
BDSI
| $103K | ﹤0.01% |
46,086
-38,179
| -45% | -$85.3K |
|
|
I
889
DELISTED
INTELSAT S. A.
I
| $102K | ﹤0.01% |
27,161
+21,170
| +353% | +$79.5K |
|
890
Navigator Holdings
NVGS
$1.11B
| $101K | ﹤0.01% |
8,677
+7,088
| +446% | +$82.5K |
|
891
STMicroelectronics
STM
$23.3B
| $101K | ﹤0.01% |
+4,572
| New | +$101K |
|
|
DGL
892
DELISTED
Invesco DB Gold Fund
DGL
| $101K | ﹤0.01% |
2,407
+300
| +14% | +$12.6K |
|
893
Federal Realty Investment Trust
FRT
$8.78B
| $100K | ﹤0.01% |
864
-1,024
| -54% | -$119K |
|
894
Macerich
MAC
$4.61B
| $100K | ﹤0.01% |
+1,800
| New | +$100K |
|
|
VRS
895
DELISTED
Verso Corporation
VRS
| $100K | ﹤0.01% |
+5,996
| New | +$100K |
|
|
JAG
896
DELISTED
Jagged Peak Energy Inc.
JAG
| $100K | ﹤0.01% |
+7,127
| New | +$100K |
|
|
KS
897
DELISTED
KapStone Paper and Pack Corp.
KS
| $100K | ﹤0.01% |
2,939
-13,306
| -82% | -$453K |
|
898
Baytex Energy
BTE
$1.83B
| $99K | ﹤0.01% |
36,301
+18,149
| +100% | +$49.5K |
|
899
Vanda Pharmaceuticals
VNDA
$272M
| $99K | ﹤0.01% |
5,878
-1,220
| -17% | -$20.5K |
|
|
NVRO
900
DELISTED
NEVRO CORP.
NVRO
| $99K | ﹤0.01% |
1,150
+1,110
| +2,775% | +$95.6K |
|