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 | |
|---|---|---|---|---|---|---|
|
GBT
551
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $380K | ﹤0.01% |
+10,018
| New | +$380K |
|
552
Caesars Entertainment
CZR
$5.33B
| $379K | ﹤0.01% |
+7,805
| New | +$379K |
|
553
Casey's General Stores
CASY
$20B
| $376K | ﹤0.01% |
2,914
-503
| -15% | -$64.9K |
|
554
Workiva
WK
$4.24B
| $374K | ﹤0.01% |
9,469
+4,939
| +109% | +$195K |
|
|
AGN
555
DELISTED
Allergan plc
AGN
| $372K | ﹤0.01% |
1,953
-15,242
| -89% | -$2.9M |
|
556
Coeur Mining
CDE
$9.6B
| $371K | ﹤0.01% |
+69,746
| New | +$371K |
|
|
ADMS
557
DELISTED
Adamas Pharmaceuticals, Inc.
ADMS
| $370K | ﹤0.01% |
18,501
+13,137
| +245% | +$263K |
|
|
XEC
558
DELISTED
CIMAREX ENERGY CO
XEC
| $370K | ﹤0.01% |
3,989
+1,391
| +54% | +$129K |
|
|
GMS
559
DELISTED
GMS Inc
GMS
| $367K | ﹤0.01% |
15,820
+14,116
| +828% | +$327K |
|
560
Dropbox
DBX
$8.29B
| $365K | ﹤0.01% |
+13,631
| New | +$365K |
|
561
Tapestry
TPR
$21.9B
| $364K | ﹤0.01% |
7,253
-8,861
| -55% | -$445K |
|
562
GDS Holdings
GDS
$6.42B
| $363K | ﹤0.01% |
10,349
-877
| -8% | -$30.8K |
|
563
Onto Innovation
ONTO
$5.2B
| $363K | ﹤0.01% |
+9,676
| New | +$363K |
|
564
Calavo Growers
CVGW
$479M
| $362K | ﹤0.01% |
+3,754
| New | +$362K |
|
565
Vishay Intertechnology
VSH
$2.07B
| $360K | ﹤0.01% |
17,733
+6,462
| +57% | +$131K |
|
566
Fomento Económico Mexicano
FMX
$30.1B
| $359K | ﹤0.01% |
3,636
-16,584
| -82% | -$1.64M |
|
567
Trinity Industries
TRN
$2.28B
| $359K | ﹤0.01% |
13,619
-12,191
| -47% | -$321K |
|
|
KEM
568
DELISTED
KEMET Corporation
KEM
| $359K | ﹤0.01% |
19,362
+3,952
| +26% | +$73.3K |
|
569
LendingTree
TREE
$977M
| $356K | ﹤0.01% |
+1,550
| New | +$356K |
|
|
GMLP
570
DELISTED
Golar LNG Partners LP
GMLP
| $355K | ﹤0.01% |
+24,834
| New | +$355K |
|
571
Delek US
DK
$1.79B
| $354K | ﹤0.01% |
8,365
-36,332
| -81% | -$1.54M |
|
|
JNCE
572
DELISTED
Jounce Therapeutics, Inc. Common Stock
JNCE
| $354K | ﹤0.01% |
54,541
+28,013
| +106% | +$182K |
|
|
TCF
573
DELISTED
TCF Financial Corporation
TCF
| $354K | ﹤0.01% |
+14,906
| New | +$354K |
|
574
Celanese
CE
$4.84B
| $353K | ﹤0.01% |
+3,099
| New | +$353K |
|
575
Brown & Brown
BRO
$30.5B
| $352K | ﹤0.01% |
11,929
+7,084
| +146% | +$209K |
|