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 | |
|---|---|---|---|---|---|---|
751
Tower Semiconductor
TSEM
$7.34B
| $150K | 0.01% |
5,584
-2,545
| -31% | -$68.4K |
|
|
MRO
752
DELISTED
Marathon Oil Corporation
MRO
| $150K | 0.01% |
+9,337
| New | +$150K |
|
|
CVA
753
DELISTED
Covanta Holding Corporation
CVA
| $150K | 0.01% |
10,354
+4,377
| +73% | +$63.4K |
|
|
EMES
754
DELISTED
Emerge Energy Services LP
EMES
| $148K | 0.01% |
24,218
+8,801
| +57% | +$53.8K |
|
755
Barrett Business Services
BBSI
$1.2B
| $147K | 0.01% |
+7,112
| New | +$147K |
|
756
Compugen
CGEN
$128M
| $147K | 0.01% |
33,215
+15,736
| +90% | +$69.6K |
|
757
Skywest
SKYW
$4.41B
| $147K | 0.01% |
+2,711
| New | +$147K |
|
758
Valmont Industries
VMI
$7.6B
| $147K | 0.01% |
+1,006
| New | +$147K |
|
|
CPE
759
DELISTED
Callon Petroleum Company
CPE
| $147K | 0.01% |
1,115
+395
| +55% | +$52.1K |
|
|
WAIR
760
DELISTED
WESCO Aircraft Holdings Inc.
WAIR
| $147K | 0.01% |
+14,375
| New | +$147K |
|
761
Safe Bulkers
SB
$451M
| $146K | 0.01% |
46,225
+18,125
| +65% | +$57.2K |
|
762
Teekay
TK
$715M
| $146K | 0.01% |
18,101
-9,974
| -36% | -$80.4K |
|
763
Trex
TREX
$6.62B
| $146K | 0.01% |
+5,400
| New | +$146K |
|
|
ONDK
764
DELISTED
On Deck Capital, Inc.
ONDK
| $146K | 0.01% |
26,242
+19,106
| +268% | +$106K |
|
|
DCT
765
DELISTED
DCT Industrial Trust Inc.
DCT
| $146K | 0.01% |
2,594
+1,210
| +87% | +$68.1K |
|
766
Coca-Cola Europacific Partners
CCEP
$40.8B
| $145K | 0.01% |
+3,501
| New | +$145K |
|
|
OAK
767
DELISTED
OAKTREE CAPITAL GROUP, LLC
OAK
| $145K | 0.01% |
3,672
-11,564
| -76% | -$457K |
|
768
Tanger
SKT
$3.9B
| $144K | 0.01% |
+6,583
| New | +$144K |
|
769
Gibraltar Industries
ROCK
$1.82B
| $143K | 0.01% |
4,245
+4,082
| +2,504% | +$138K |
|
770
Parker-Hannifin
PH
$98.6B
| $142K | 0.01% |
+835
| New | +$142K |
|
771
Upbound Group
UPBD
$1.45B
| $142K | 0.01% |
+16,534
| New | +$142K |
|
772
Woodward
WWD
$14.5B
| $142K | 0.01% |
1,989
+1,861
| +1,454% | +$133K |
|
|
AHL
773
DELISTED
ASPEN Insurance Holding Limited
AHL
| $142K | 0.01% |
3,185
-7,120
| -69% | -$317K |
|
774
Eagle Materials
EXP
$7.69B
| $141K | 0.01% |
1,372
-2,440
| -64% | -$251K |
|
775
Ezcorp Inc
EZPW
$1.01B
| $141K | 0.01% |
+10,701
| New | +$141K |
|