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 | |
|---|---|---|---|---|---|---|
901
Verisk Analytics
VRSK
$37.2B
| $141K | ﹤0.01% |
+1,171
| New | +$141K |
|
902
Main Street Capital
MAIN
$6.01B
| $140K | ﹤0.01% |
+3,657
| New | +$140K |
|
903
Ocular Therapeutix
OCUL
$2.22B
| $140K | ﹤0.01% |
+20,452
| New | +$140K |
|
904
Pilgrim's Pride
PPC
$10.5B
| $140K | ﹤0.01% |
+7,765
| New | +$140K |
|
905
Gentherm
THRM
$1.1B
| $140K | ﹤0.01% |
3,089
-7,340
| -70% | -$333K |
|
906
Twilio
TWLO
$15.7B
| $140K | ﹤0.01% |
1,632
-49,060
| -97% | -$4.21M |
|
907
Xerox
XRX
$466M
| $140K | ﹤0.01% |
5,225
-34,769
| -87% | -$932K |
|
|
ALDR
908
DELISTED
Alder Biopharmaceuticals, Inc.
ALDR
| $140K | ﹤0.01% |
8,409
-4,205
| -33% | -$70K |
|
909
e.l.f. Beauty
ELF
$7.83B
| $139K | ﹤0.01% |
+10,931
| New | +$139K |
|
910
W&T Offshore
WTI
$258M
| $139K | ﹤0.01% |
14,479
-49,693
| -77% | -$477K |
|
|
CLD
911
DELISTED
Cloud Peak Energy Inc
CLD
| $139K | ﹤0.01% |
60,616
+31,093
| +105% | +$71.3K |
|
912
Exelixis
EXEL
$10.5B
| $138K | ﹤0.01% |
7,836
+7,436
| +1,859% | +$131K |
|
913
Donnelley Financial Solutions
DFIN
$1.54B
| $137K | ﹤0.01% |
7,649
-3,027
| -28% | -$54.2K |
|
914
Lexicon Pharmaceuticals
LXRX
$403M
| $137K | ﹤0.01% |
12,929
+12,820
| +11,761% | +$136K |
|
915
Zumiez
ZUMZ
$362M
| $137K | ﹤0.01% |
+5,202
| New | +$137K |
|
|
ITG
916
DELISTED
Investment Technology Group Inc
ITG
| $137K | ﹤0.01% |
6,336
+5,004
| +376% | +$108K |
|
917
Gray Television
GTN
$599M
| $136K | ﹤0.01% |
7,806
+1,471
| +23% | +$25.6K |
|
918
Ingersoll Rand
IR
$32.2B
| $136K | ﹤0.01% |
+4,831
| New | +$136K |
|
919
ProShares Short QQQ
PSQ
$539M
| $136K | ﹤0.01% |
936
+222
| +31% | +$32.3K |
|
|
ARQL
920
DELISTED
Arqule Inc
ARQL
| $134K | ﹤0.01% |
23,779
-4,469
| -16% | -$25.2K |
|
921
Arrowhead Research
ARWR
$4.11B
| $133K | ﹤0.01% |
6,974
-53,215
| -88% | -$1.01M |
|
922
Brink's
BCO
$4.9B
| $133K | ﹤0.01% |
1,912
-2,076
| -52% | -$144K |
|
923
Ring Energy
REI
$211M
| $133K | ﹤0.01% |
13,432
+444
| +3% | +$4.4K |
|
924
Teucrium Wheat Fund
WEAT
$117M
| $133K | ﹤0.01% |
21,314
-19,353
| -48% | -$121K |
|
925
G-III Apparel Group
GIII
$1.15B
| $132K | ﹤0.01% |
+2,746
| New | +$132K |
|