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
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2001
PUT
Inovio Pharmaceuticals
INO
$79.8M
| $2.27M | ﹤0.01% |
+20,392
| New | +$1.96M |
|
|
MOMO
2002
PUT
Hello Group
MOMO
$869M
| $2.27M | ﹤0.01% |
148,100
+145,914
| +6,675% | +$2.15M |
|
2003
PUT
Cenovus Energy
CVE
$54.6B
| $2.26M | ﹤0.01% |
+235,800
| New | +$2M |
|
2004
CALL
Levi Strauss
LEVI
$9.44B
| $2.25M | ﹤0.01% |
81,300
+80,503
| +10,101% | +$2.21M |
|
2005
CALL
Americold
COLD
$4.09B
| $2.25M | ﹤0.01% |
59,500
+58,310
| +4,900% | +$2.26M |
|
|
HAPN
2006
CALL
Happen Inc
HAPN
$2.08B
| $2.25M | ﹤0.01% |
123,900
+122,252
| +7,418% | +$1.9M |
|
2007
PUT
Omeros
OMER
$709M
| $2.25M | ﹤0.01% |
151,400
+151,260
| +108,043% | +$2.54M |
|
|
MIC
2008
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $2.25M | ﹤0.01% |
58,689
+53,078
| +946% | +$1.87M |
|
2009
CALL
Knight Transportation
KNX
$11.8B
| $2.25M | ﹤0.01% |
49,400
+48,919
| +10,170% | +$2.34M |
|
2010
Centene
CNC
$31.3B
| $2.24M | ﹤0.01% |
30,756
-10,156
| -25% | -$696K |
|
2011
CALL
EQT Corp
EQT
$33.2B
| $2.24M | ﹤0.01% |
100,700
+99,308
| +7,134% | +$2.01M |
|
2012
PUT
NovoCure
NVCR
$2.04B
| $2.24M | ﹤0.01% |
10,100
+10,038
| +16,190% | +$1.95M |
|
2013
CALL
Vera Bradley
VRA
$105M
| $2.24M | ﹤0.01% |
180,800
+178,189
| +6,825% | +$2.04M |
|
2014
CALL
MSCI
MSCI
$40B
| $2.24M | ﹤0.01% |
4,200
+4,146
| +7,678% | +$1.98M |
|
2015
PUT
Incyte
INCY
$23.5B
| $2.24M | ﹤0.01% |
+26,600
| New | +$2.22M |
|
2016
PUT
Infosys
INFY
$45B
| $2.24M | ﹤0.01% |
105,600
+104,760
| +12,471% | +$2M |
|
2017
PUT
Packaging Corp of America
PKG
$22.7B
| $2.23M | ﹤0.01% |
16,500
+16,440
| +27,400% | +$2.37M |
|
2018
PUT
Murphy Oil
MUR
$5.58B
| $2.23M | ﹤0.01% |
+95,800
| New | +$1.95M |
|
2019
CALL
Funko
FNKO
$323M
| $2.23M | ﹤0.01% |
104,700
+103,023
| +6,143% | +$2.34M |
|
2020
PUT
Goodyear
GT
$2.07B
| $2.23M | ﹤0.01% |
130,000
+128,204
| +7,138% | +$2.36M |
|
|
CTRA
2021
CALL
DELISTED
Coterra Energy
CTRA
| $2.23M | ﹤0.01% |
127,600
+127,224
| +33,836% | +$2.16M |
|
2022
Digital Turbine
APPS
$1.02B
| $2.22M | ﹤0.01% |
+29,182
| New | +$2.08M |
|
2023
PUT
Weibo
WB
$1.9B
| $2.21M | ﹤0.01% |
+42,100
| New | +$2.09M |
|
|
QELL
2024
PUT
DELISTED
Qell Acquisition Corp. Class A Ordinary Shares
QELL
| $2.21M | ﹤0.01% |
222,700
+220,327
| +9,285% | +$2.19M |
|
|
CYBR
2025
CALL
DELISTED
CyberArk
CYBR
| $2.21M | ﹤0.01% |
17,000
+16,680
| +5,213% | +$2.22M |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.