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 | |
|---|---|---|---|---|---|---|
|
WGL
651
DELISTED
Wgl Holdings
WGL
| $193K | 0.01% |
2,309
+2,255
| +4,176% | +$188K |
|
652
Carlyle Group
CG
$23.7B
| $192K | 0.01% |
9,034
-10,836
| -55% | -$230K |
|
|
ACIA
653
DELISTED
Acacia Communications, Inc. Common Stock
ACIA
| $192K | 0.01% |
5,003
-14,209
| -74% | -$545K |
|
|
CALD
654
DELISTED
Callidus Software, Inc.
CALD
| $192K | 0.01% |
5,366
+3,302
| +160% | +$118K |
|
655
iShares MSCI France ETF
EWQ
$386M
| $191K | 0.01% |
6,089
+997
| +20% | +$31.3K |
|
656
Stratasys
SSYS
$834M
| $191K | 0.01% |
+9,502
| New | +$191K |
|
|
MRNS
657
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $191K | 0.01% |
12,565
+12,061
| +2,393% | +$183K |
|
658
Autoliv
ALV
$9.63B
| $190K | 0.01% |
+1,814
| New | +$190K |
|
659
Tucows
TCX
$194M
| $190K | 0.01% |
3,404
-12,948
| -79% | -$723K |
|
660
Jabil
JBL
$23.2B
| $189K | 0.01% |
+6,587
| New | +$189K |
|
661
SS&C Technologies
SSNC
$21.6B
| $189K | 0.01% |
3,531
+154
| +5% | +$8.24K |
|
662
Post Holdings
POST
$5.69B
| $188K | 0.01% |
3,792
-1,643
| -30% | -$81.5K |
|
|
TWOU
663
DELISTED
2U, Inc.
TWOU
| $188K | 0.01% |
+75
| New | +$188K |
|
|
WLH
664
DELISTED
WILLIAM LYON HOMES
WLH
| $187K | 0.01% |
6,836
+1,669
| +32% | +$45.7K |
|
665
ProShares Ultra Silver
AGQ
$853M
| $186K | 0.01% |
5,998
+3,713
| +162% | +$115K |
|
666
Ovintiv
OVV
$11B
| $186K | 0.01% |
+3,396
| New | +$186K |
|
|
AUY
667
DELISTED
Yamana Gold, Inc.
AUY
| $185K | 0.01% |
+67,136
| New | +$185K |
|
668
Energous
WATT
$11.3M
| $184K | 0.01% |
19
-83
| -81% | -$804K |
|
|
PVG
669
DELISTED
PRETIUM RESOURCES INC.
PVG
| $184K | 0.01% |
27,647
+23,509
| +568% | +$156K |
|
|
SWN
670
DELISTED
Southwestern Energy Company
SWN
| $183K | 0.01% |
42,480
+13,380
| +46% | +$57.6K |
|
|
DBD
671
DELISTED
Diebold Nixdorf Incorporated
DBD
| $183K | 0.01% |
11,945
+6,343
| +113% | +$97.2K |
|
672
Labcorp
LH
$22.7B
| $182K | 0.01% |
+1,312
| New | +$182K |
|
673
Vermilion Energy
VET
$1.18B
| $182K | 0.01% |
5,654
+4,004
| +243% | +$129K |
|
|
UPL
674
DELISTED
Ultra Petroleum Corp. Common Stock
UPL
| $181K | 0.01% |
43,439
+28,823
| +197% | +$120K |
|
675
Calumet Specialty Products
CLMT
$1.53B
| $180K | 0.01% |
25,665
+7,073
| +38% | +$49.6K |
|