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 |
Tesla
TSLA
|
+$27.1M |
| 2 |
Netflix
NFLX
|
+$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
+$71.9M |
| 2 |
Micron Technology
MU
|
+$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Boeing
BA
|
+$21M |
| 5 |
Citigroup
C
|
+$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
576
Cal-Maine
CALM
$5.31B
| $253K | 0.01% |
5,807
+3,298
| +131% | +$144K |
|
577
Dominion Energy
D
$50.7B
| $252K | 0.01% |
+3,743
| New | +$252K |
|
578
Invesco CurrencyShares Canadian Dollar Trust
FXC
$91.6M
| $252K | 0.01% |
3,296
+2,284
| +226% | +$175K |
|
579
Alarm.com
ALRM
$2.76B
| $250K | 0.01% |
6,645
-1,002
| -13% | -$37.7K |
|
580
Fortinet
FTNT
$60.9B
| $250K | 0.01% |
+23,340
| New | +$250K |
|
|
MVO
581
MV Oil Trust
MVO
$68.9M
| $250K | 0.01% |
31,813
-3,510
| -10% | -$27.6K |
|
|
TFCFA
582
DELISTED
Twenty-First Century Fox, Inc. Class A
TFCFA
| $246K | 0.01% |
+6,705
| New | +$246K |
|
|
GRA
583
DELISTED
W.R. Grace & Co.
GRA
| $245K | 0.01% |
4,013
-9,857
| -71% | -$602K |
|
|
OPB
584
DELISTED
Opus Bank Common Stock
OPB
| $243K | 0.01% |
+8,680
| New | +$243K |
|
|
DFS
585
DELISTED
Discover Financial Services
DFS
| $242K | 0.01% |
3,375
-9,695
| -74% | -$695K |
|
586
Owens & Minor
OMI
$423M
| $242K | 0.01% |
15,625
+2,723
| +21% | +$42.2K |
|
|
TECD
587
DELISTED
Tech Data Corp
TECD
| $240K | 0.01% |
+2,822
| New | +$240K |
|
588
Canadian Solar
CSIQ
$725M
| $239K | 0.01% |
14,741
-18,908
| -56% | -$307K |
|
589
Nelnet
NNI
$4.44B
| $237K | 0.01% |
4,539
+679
| +18% | +$35.5K |
|
590
Ichor Holdings
ICHR
$567M
| $236K | 0.01% |
9,767
-1,621
| -14% | -$39.2K |
|
591
Teradata
TDC
$1.99B
| $236K | 0.01% |
5,956
-2,827
| -32% | -$112K |
|
|
HNP
592
DELISTED
Huaneng Power Intl, Inc.
HNP
| $235K | 0.01% |
8,762
+5,796
| +195% | +$155K |
|
593
Jazz Pharmaceuticals
JAZZ
$7.7B
| $233K | 0.01% |
1,544
-1,449
| -48% | -$219K |
|
594
MGIC Investment
MTG
$6.54B
| $232K | 0.01% |
17,898
+14,354
| +405% | +$186K |
|
595
Adverum Biotechnologies
ADVM
$69.5M
| $231K | 0.01% |
3,993
+1,102
| +38% | +$63.8K |
|
596
US Bancorp
USB
$76.6B
| $231K | 0.01% |
+4,583
| New | +$231K |
|
|
EGN
597
DELISTED
Energen
EGN
| $231K | 0.01% |
3,688
-14,581
| -80% | -$913K |
|
598
ADT
ADT
$7.05B
| $230K | 0.01% |
+29,033
| New | +$230K |
|
599
Fortune Brands Innovations
FBIN
$7.05B
| $230K | 0.01% |
+4,589
| New | +$230K |
|
600
New Mountain Finance
NMFC
$1.11B
| $229K | 0.01% |
17,459
+2,401
| +16% | +$31.5K |
|