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 | |
|---|---|---|---|---|---|---|
626
Cimpress
CMPR
$1.53B
| $281K | ﹤0.01% |
+2,236
| New | +$281K |
|
627
Stratasys
SSYS
$861M
| $281K | ﹤0.01% |
13,935
-1,115
| -7% | -$22.5K |
|
628
Axsome Therapeutics
AXSM
$6.27B
| $280K | ﹤0.01% |
2,713
-24,371
| -90% | -$2.52M |
|
629
Medpace
MEDP
$13.6B
| $280K | ﹤0.01% |
3,341
+2,956
| +768% | +$248K |
|
630
Stanley Black & Decker
SWK
$11.9B
| $280K | ﹤0.01% |
1,695
-18,673
| -92% | -$3.08M |
|
631
Lesaka Technologies
LSAK
$372M
| $279K | ﹤0.01% |
75,104
+67,986
| +955% | +$253K |
|
632
Wave Life Sciences
WVE
$1.19B
| $278K | ﹤0.01% |
34,722
+30,920
| +813% | +$248K |
|
633
Direxion Daily Financial Bear 3x Shares
FAZ
$106M
| $277K | ﹤0.01% |
1,250
+718
| +135% | +$159K |
|
|
TSG
634
DELISTED
The Stars Group Inc.
TSG
| $277K | ﹤0.01% |
10,647
-37,540
| -78% | -$977K |
|
635
Cal-Maine
CALM
$5.27B
| $276K | ﹤0.01% |
6,463
-2,713
| -30% | -$116K |
|
636
Ichor Holdings
ICHR
$563M
| $276K | ﹤0.01% |
+8,316
| New | +$276K |
|
637
Axogen
AXGN
$756M
| $275K | ﹤0.01% |
+15,400
| New | +$275K |
|
638
Edwards Lifesciences
EW
$46.9B
| $274K | ﹤0.01% |
+3,525
| New | +$274K |
|
639
Safety Insurance
SAFT
$1.09B
| $274K | ﹤0.01% |
2,971
+1,383
| +87% | +$128K |
|
|
INFN
640
DELISTED
Infinera Corporation Common Stock
INFN
| $272K | ﹤0.01% |
34,346
-35,870
| -51% | -$284K |
|
641
Catalyst Pharmaceutical
CPRX
$2.45B
| $270K | ﹤0.01% |
72,030
-9,922
| -12% | -$37.2K |
|
|
MDC
642
DELISTED
M.D.C. Holdings, Inc.
MDC
| $270K | ﹤0.01% |
7,646
-9,887
| -56% | -$349K |
|
643
Inseego
INSG
$193M
| $268K | ﹤0.01% |
3,661
+3,030
| +480% | +$222K |
|
644
Openlane
KAR
$3.14B
| $268K | ﹤0.01% |
12,335
+9,793
| +385% | +$213K |
|
645
Malibu Boats
MBUU
$626M
| $268K | ﹤0.01% |
6,563
+6,030
| +1,131% | +$246K |
|
646
Newmark Group
NMRK
$3.3B
| $268K | ﹤0.01% |
19,944
+7,767
| +64% | +$104K |
|
647
Spectrum Brands
SPB
$1.35B
| $267K | ﹤0.01% |
4,165
-922
| -18% | -$59.1K |
|
648
Icahn Enterprises
IEP
$4.75B
| $266K | ﹤0.01% |
+4,339
| New | +$266K |
|
|
ARQL
649
DELISTED
Arqule Inc
ARQL
| $266K | ﹤0.01% |
+13,334
| New | +$266K |
|
|
WW
650
DELISTED
WW International
WW
| $265K | ﹤0.01% |
+6,950
| New | +$265K |
|