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
|
$80M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$45.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$38.8M |
| 4 |
Amazon
AMZN
|
$38.6M |
| 5 |
Tesla
TSLA
|
$36M |
Top Sells
| 1 |
Alibaba
BABA
|
$46.4M |
| 2 |
Boeing
BA
|
$29.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
NVIDIA
NVDA
|
$14.3M |
Sector Composition
| 1 | Technology | 22.73% |
| 2 | Consumer Discretionary | 17.54% |
| 3 | Communication Services | 10.03% |
| 4 | Healthcare | 9.29% |
| 5 | Industrials | 5.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
576
Citizens Financial Group
CFG
$22.3B
| $324K | ﹤0.01% |
7,995
+374
| +5% | +$15.2K |
|
|
POLY
577
DELISTED
Plantronics, Inc.
POLY
| $322K | ﹤0.01% |
11,811
+3,928
| +50% | +$107K |
|
578
Direxion Daily 20+ Year Treasury Bull 3X Shares
TMF
$5.29B
| $321K | ﹤0.01% |
+1,243
| New | +$321K |
|
579
Black Stone Minerals
BSM
$2.53B
| $320K | ﹤0.01% |
25,184
+2,625
| +12% | +$33.4K |
|
580
Toronto Dominion Bank
TD
$127B
| $320K | ﹤0.01% |
5,711
+281
| +5% | +$15.7K |
|
581
Chemours
CC
$2.34B
| $319K | ﹤0.01% |
17,642
+2,449
| +16% | +$44.3K |
|
582
UBS Group
UBS
$128B
| $317K | ﹤0.01% |
25,259
+5,869
| +30% | +$73.7K |
|
583
Advanced Drainage Systems
WMS
$11.5B
| $317K | ﹤0.01% |
8,174
-8,958
| -52% | -$347K |
|
|
BFYT
584
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $317K | ﹤0.01% |
16,442
-27,615
| -63% | -$532K |
|
585
Itaú Unibanco
ITUB
$76.6B
| $314K | ﹤0.01% |
+45,928
| New | +$314K |
|
586
Axon Enterprise
AXON
$57.2B
| $313K | ﹤0.01% |
4,284
+2,553
| +147% | +$187K |
|
587
Medical Properties Trust
MPW
$2.77B
| $312K | ﹤0.01% |
14,827
-56,469
| -79% | -$1.19M |
|
|
TCO
588
DELISTED
Taubman Centers Inc.
TCO
| $312K | ﹤0.01% |
10,067
+8,838
| +719% | +$274K |
|
589
Bio-Rad Laboratories Class A
BIO
$8B
| $310K | ﹤0.01% |
+838
| New | +$310K |
|
590
Solid Biosciences
SLDB
$428M
| $310K | ﹤0.01% |
4,659
+2,488
| +115% | +$166K |
|
|
SCWX
591
DELISTED
SecureWorks Corp Class A Common Stock
SCWX
| $310K | ﹤0.01% |
18,610
+18,129
| +3,769% | +$302K |
|
592
Cloudflare
NET
$74.7B
| $308K | ﹤0.01% |
18,100
+628
| +4% | +$10.7K |
|
593
Clearwater Paper
CLW
$354M
| $307K | ﹤0.01% |
14,399
-3,665
| -20% | -$78.1K |
|
|
FRC
594
DELISTED
First Republic Bank
FRC
| $307K | ﹤0.01% |
+2,620
| New | +$307K |
|
595
Etsy
ETSY
$5.36B
| $306K | ﹤0.01% |
+6,918
| New | +$306K |
|
596
Heron Therapeutics
HRTX
$201M
| $306K | ﹤0.01% |
13,051
-32,164
| -71% | -$754K |
|
597
iShares US Aerospace & Defense ETF
ITA
$9.3B
| $306K | ﹤0.01% |
+2,758
| New | +$306K |
|
598
Invesco Solar ETF
TAN
$765M
| $306K | ﹤0.01% |
9,937
+2,638
| +36% | +$81.2K |
|
599
Digital Turbine
APPS
$483M
| $305K | ﹤0.01% |
42,915
+18,035
| +72% | +$128K |
|
600
Universal Insurance Holdings
UVE
$697M
| $302K | ﹤0.01% |
10,824
-40,075
| -79% | -$1.12M |
|