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 | |
|---|---|---|---|---|---|---|
451
STMicroelectronics
STM
$23.2B
| $512K | ﹤0.01% |
27,929
+21,432
| +330% | +$393K |
|
|
POLY
452
DELISTED
Plantronics, Inc.
POLY
| $511K | ﹤0.01% |
+8,490
| New | +$511K |
|
453
IDEX
IEX
$12.4B
| $503K | ﹤0.01% |
+3,339
| New | +$503K |
|
454
Factset
FDS
$14.2B
| $502K | ﹤0.01% |
2,245
-4,532
| -67% | -$1.01M |
|
455
Fabrinet
FN
$13.2B
| $502K | ﹤0.01% |
10,869
+8,622
| +384% | +$398K |
|
456
Hyatt Hotels
H
$13.9B
| $499K | ﹤0.01% |
6,272
-3,615
| -37% | -$288K |
|
457
NewMarket
NEU
$7.8B
| $499K | ﹤0.01% |
1,232
+269
| +28% | +$109K |
|
458
Cracker Barrel
CBRL
$1.12B
| $498K | ﹤0.01% |
+3,389
| New | +$498K |
|
459
Extra Space Storage
EXR
$30.8B
| $498K | ﹤0.01% |
5,756
+4,693
| +441% | +$406K |
|
|
CY
460
DELISTED
Cypress Semiconductor
CY
| $496K | ﹤0.01% |
34,276
+20,336
| +146% | +$294K |
|
461
Copart
CPRT
$46.5B
| $494K | ﹤0.01% |
+38,360
| New | +$494K |
|
462
Kratos Defense & Security Solutions
KTOS
$10.9B
| $494K | ﹤0.01% |
33,443
+30,837
| +1,183% | +$456K |
|
463
Hexcel
HXL
$5.12B
| $491K | ﹤0.01% |
7,327
-2,328
| -24% | -$156K |
|
464
Addus HomeCare
ADUS
$2.11B
| $486K | ﹤0.01% |
6,939
+6,839
| +6,839% | +$479K |
|
465
Embraer
ERJ
$11.1B
| $486K | ﹤0.01% |
24,832
-5,167
| -17% | -$101K |
|
466
iShares US Technology ETF
IYW
$23.3B
| $486K | ﹤0.01% |
10,024
+3,436
| +52% | +$167K |
|
|
QEP
467
DELISTED
QEP RESOURCES, INC.
QEP
| $485K | ﹤0.01% |
+42,851
| New | +$485K |
|
468
Carlyle Group
CG
$23.2B
| $483K | ﹤0.01% |
+21,453
| New | +$483K |
|
469
ProShares Short 20+ Year Treasury ETF
TBF
$69.5M
| $477K | ﹤0.01% |
20,397
-27,263
| -57% | -$638K |
|
470
Unisys
UIS
$287M
| $477K | ﹤0.01% |
23,430
+22,057
| +1,606% | +$449K |
|
|
VWTR
471
DELISTED
Vidler Water Resouces, Inc. Common Stock
VWTR
| $477K | ﹤0.01% |
38,072
+13,107
| +53% | +$164K |
|
472
CoStar Group
CSGP
$37.3B
| $474K | ﹤0.01% |
+11,270
| New | +$474K |
|
473
ING
ING
$71B
| $474K | ﹤0.01% |
36,578
+7,226
| +25% | +$93.6K |
|
474
Expeditors International
EXPD
$16.4B
| $473K | ﹤0.01% |
6,441
+6,347
| +6,752% | +$466K |
|
475
Nelnet
NNI
$4.58B
| $471K | ﹤0.01% |
8,240
+5,479
| +198% | +$313K |
|