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 |
Amazon
AMZN
|
+$158M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$69.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$57.4M |
| 4 |
Citigroup
C
|
+$23.4M |
| 5 |
Goldman Sachs
GS
|
+$23M |
Top Sells
| 1 |
Apple
AAPL
|
+$49.8M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$43.2M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$42.2M |
| 4 |
Micron Technology
MU
|
+$26.1M |
| 5 |
Adobe
ADBE
|
+$21M |
Sector Composition
| 1 | Consumer Discretionary | 20.63% |
| 2 | Communication Services | 16.3% |
| 3 | Technology | 12.42% |
| 4 | Industrials | 9.24% |
| 5 | Healthcare | 8.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
826
St. Joe Company
JOE
$3.05B
| $174K | ﹤0.01% |
10,416
+5,269
| +102% | +$88K |
|
|
BOJA
827
DELISTED
Bojangles', Inc. Common Stock
BOJA
| $174K | ﹤0.01% |
11,144
+4,088
| +58% | +$63.8K |
|
|
EXPR
828
DELISTED
Express, Inc.
EXPR
| $173K | ﹤0.01% |
+787
| New | +$173K |
|
829
H&R Block
HRB
$6.98B
| $172K | ﹤0.01% |
6,682
-60,489
| -90% | -$1.56M |
|
830
Pediatrix Medical
MD
$1.48B
| $172K | ﹤0.01% |
3,705
+3,106
| +519% | +$144K |
|
831
Ultra Clean Holdings
UCTT
$1.16B
| $172K | ﹤0.01% |
13,758
-6,971
| -34% | -$87.2K |
|
|
PRSP
832
DELISTED
Perspecta Inc. Common Stock
PRSP
| $172K | ﹤0.01% |
6,698
-19,052
| -74% | -$489K |
|
|
FPRX
833
DELISTED
Five Prime Therapeutics, Inc.
FPRX
| $172K | ﹤0.01% |
12,383
-7,102
| -36% | -$98.6K |
|
|
GFN
834
DELISTED
General Finance Corporation
GFN
| $172K | ﹤0.01% |
10,819
+10,718
| +10,612% | +$170K |
|
835
Shake Shack
SHAK
$4.18B
| $171K | ﹤0.01% |
+2,728
| New | +$171K |
|
836
Hologic
HOLX
$14.8B
| $170K | ﹤0.01% |
+4,170
| New | +$170K |
|
|
MANT
837
DELISTED
Mantech International Corp
MANT
| $170K | ﹤0.01% |
2,694
+2,667
| +9,878% | +$168K |
|
838
Appian
APPN
$2.33B
| $169K | ﹤0.01% |
5,131
+4,105
| +400% | +$135K |
|
839
Heartland Express
HTLD
$671M
| $167K | ﹤0.01% |
8,511
+5,253
| +161% | +$103K |
|
840
Immersion
IMMR
$221M
| $167K | ﹤0.01% |
15,823
+11,397
| +258% | +$120K |
|
841
Vermilion Energy
VET
$1.14B
| $167K | ﹤0.01% |
5,097
+199
| +4% | +$6.52K |
|
842
Cognex
CGNX
$7.55B
| $165K | ﹤0.01% |
2,965
-1,558
| -34% | -$86.7K |
|
843
Lennox International
LII
$19.9B
| $165K | ﹤0.01% |
759
+600
| +377% | +$130K |
|
844
Owens & Minor
OMI
$423M
| $165K | ﹤0.01% |
9,990
+9,345
| +1,449% | +$154K |
|
|
EGRX
845
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $164K | ﹤0.01% |
+2,375
| New | +$164K |
|
|
TRTN
846
DELISTED
Triton International Limited
TRTN
| $164K | ﹤0.01% |
4,950
-1,689
| -25% | -$56K |
|
|
SWIR
847
DELISTED
Sierra Wireless
SWIR
| $163K | ﹤0.01% |
+8,154
| New | +$163K |
|
|
ARRY
848
DELISTED
Array Biopharma Inc
ARRY
| $163K | ﹤0.01% |
10,763
-27,324
| -72% | -$414K |
|
849
Esperion Therapeutics
ESPR
$563M
| $162K | ﹤0.01% |
3,657
+1,159
| +46% | +$51.3K |
|
850
Orion
OEC
$581M
| $162K | ﹤0.01% |
5,070
+4,649
| +1,104% | +$149K |
|