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
|
$186M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$86.2M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
$56.8M |
| 4 |
iShares Silver Trust
SLV
|
$42.9M |
| 5 |
Advanced Micro Devices
AMD
|
$36.5M |
Top Sells
| 1 |
Occidental Petroleum
OXY
|
$44.4M |
| 2 |
Financial Select Sector SPDR Fund
XLF
|
$42.8M |
| 3 |
Verizon
VZ
|
$40.8M |
| 4 |
Direxion Daily S&P 500 Bull 3x Shares
SPXL
|
$33.6M |
| 5 |
iShares China Large-Cap ETF
FXI
|
$33M |
Sector Composition
| 1 | Technology | 23.31% |
| 2 | Consumer Discretionary | 13.02% |
| 3 | Industrials | 8.23% |
| 4 | Healthcare | 7.47% |
| 5 | Financials | 6.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
4951
Alliance Resource Partners
ARLP
$2.96B
| – | – | -12,779 | Closed | -$161K |
|
4952
Aramark
ARMK
$10.3B
| – | – | -3,309 | Closed | -$121K |
|
4953
Archrock
AROC
$4.35B
| – | – | -9,984 | Closed | -$74K |
|
4954
Array Technologies
ARRY
$1.38B
| – | – | 0 | – | – |
|
4955
Arvinas
ARVN
$568M
| – | – | -77 | Closed | -$6K |
|
|
ASA
4956
ASA Gold and Precious Metals
ASA
$710M
| – | – | -5 | Closed | – |
|
4957
Arrow Electronics
ARW
$6.51B
| – | – | 0 | – | – |
|
4958
Associated Banc-Corp
ASB
$4.47B
| – | – | 0 | – | – |
|
4959
Assembly Biosciences
ASMB
$190M
| – | – | -2,897 | Closed | -$6K |
|
4960
Ascendis Pharma
ASND
$11.8B
| – | – | 0 | – | – |
|
4961
Grupo Aeroportuario del Sureste
ASR
$9.77B
| – | – | 0 | – | – |
|
4962
Assertio
ASRT
$80.4M
| – | – | -100,951 | Closed | -$220K |
|