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 |
Apple
AAPL
|
$35.2M |
| 2 |
Micron Technology
MU
|
$32.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
$29.5M |
| 4 |
NVIDIA
NVDA
|
$22.9M |
| 5 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$22M |
Top Sells
| 1 |
TWX
Time Warner Inc
TWX
|
$34.8M |
| 2 |
Amazon
AMZN
|
$33.4M |
| 3 |
Tesla
TSLA
|
$19.8M |
| 4 |
Netflix
NFLX
|
$17.7M |
| 5 |
TWTR
Twitter, Inc.
TWTR
|
$13.5M |
Sector Composition
| 1 | Technology | 20.43% |
| 2 | Consumer Discretionary | 15.24% |
| 3 | Communication Services | 12% |
| 4 | Financials | 10.18% |
| 5 | Industrials | 9.87% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
551
Range Resources
RRC
$8.27B
| $365K | ﹤0.01% |
+21,861
| New | +$365K |
|
552
CRH
CRH
$75.4B
| $363K | ﹤0.01% |
10,294
+6,863
| +200% | +$242K |
|
553
Pathward Financial
CASH
$1.74B
| $362K | ﹤0.01% |
+11,178
| New | +$362K |
|
554
Entergy
ETR
$39.2B
| $362K | ﹤0.01% |
8,972
+8,072
| +897% | +$326K |
|
555
Casey's General Stores
CASY
$18.8B
| $359K | ﹤0.01% |
+3,417
| New | +$359K |
|
556
SiriusXM
SIRI
$8.1B
| $359K | ﹤0.01% |
5,306
+4,805
| +959% | +$325K |
|
557
Materials Select Sector SPDR Fund
XLB
$5.52B
| $356K | ﹤0.01% |
6,140
-16,785
| -73% | -$973K |
|
|
MZOR
558
DELISTED
Mazor Robotics Ltd.
MZOR
| $356K | ﹤0.01% |
6,420
-7,893
| -55% | -$438K |
|
559
AutoNation
AN
$8.55B
| $355K | ﹤0.01% |
+7,317
| New | +$355K |
|
560
FirstEnergy
FE
$25.1B
| $354K | ﹤0.01% |
9,863
-45,545
| -82% | -$1.63M |
|
561
Equity Residential
EQR
$25.5B
| $353K | ﹤0.01% |
5,543
+4,800
| +646% | +$306K |
|
|
NRE
562
DELISTED
NorthStar Realty Europe Corp.
NRE
| $353K | ﹤0.01% |
24,419
+17,916
| +276% | +$259K |
|
563
Thor Industries
THO
$5.94B
| $351K | ﹤0.01% |
3,610
-324
| -8% | -$31.5K |
|
564
Gaming and Leisure Properties
GLPI
$13.7B
| $346K | ﹤0.01% |
9,673
+4,814
| +99% | +$172K |
|
|
RP
565
DELISTED
RealPage, Inc.
RP
| $345K | ﹤0.01% |
+6,278
| New | +$345K |
|
566
Ultra Clean Holdings
UCTT
$1.11B
| $344K | ﹤0.01% |
20,729
+17,915
| +637% | +$297K |
|
567
Arthur J. Gallagher & Co
AJG
$76.7B
| $342K | ﹤0.01% |
5,243
+4,955
| +1,720% | +$323K |
|
568
iShares US Aerospace & Defense ETF
ITA
$9.3B
| $342K | ﹤0.01% |
+3,560
| New | +$342K |
|
569
Element Solutions
ESI
$6.33B
| $341K | ﹤0.01% |
29,409
-6,758
| -19% | -$78.4K |
|
570
Affiliated Managers Group
AMG
$6.54B
| $340K | ﹤0.01% |
+2,292
| New | +$340K |
|
571
Vanguard Consumer Discretionary ETF
VCR
$6.52B
| $340K | ﹤0.01% |
+2,008
| New | +$340K |
|
|
LN
572
DELISTED
LINE Corporation
LN
| $340K | ﹤0.01% |
8,290
+6,291
| +315% | +$258K |
|
573
Century Aluminum
CENX
$2.06B
| $336K | ﹤0.01% |
21,376
+9,483
| +80% | +$149K |
|
574
Tronox
TROX
$710M
| $336K | ﹤0.01% |
+17,107
| New | +$336K |
|
575
Invesco S&P 500 Low Volatility ETF
SPLV
$7.99B
| $335K | ﹤0.01% |
7,081
-10,896
| -61% | -$515K |
|