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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2001
CALL
Nektar Therapeutics
NKTR
$2.39B
| $1.6M | ﹤0.01% |
63
+42
| +200% | +$10.9K |
|
2002
CALL
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.6M | ﹤0.01% |
327
+6
| +2% | +$253 |
|
2003
CALL
Western Union
WU
$2.57B
| $1.6M | ﹤0.01% |
731
-606
| -45% | -$13.1K |
|
|
SGI
2004
PUT
Somnigroup International
SGI
$15.1B
| $1.6M | ﹤0.01% |
593
-207
| -26% | -$5.05K |
|
2005
PUT
Hormel Foods
HRL
$13.9B
| $1.6M | ﹤0.01% |
343
+85
| +33% | +$4.15K |
|
2006
GoDaddy
GDDY
$12.3B
| $1.6M | ﹤0.01% |
+19,263
| New | +$1.51M |
|
2007
PUT
Asana
ASAN
$1.58B
| $1.59M | ﹤0.01% |
+540
| New | +$13.8K |
|
|
CYBR
2008
DELISTED
CyberArk
CYBR
| $1.59M | ﹤0.01% |
+9,865
| New | +$1.15M |
|
2009
CALL
DigitalBridge
DBRG
$2.94B
| $1.59M | ﹤0.01% |
828
-81
| -9% | -$1.3K |
|
2010
Energy Transfer Partners
ET
$70.1B
| $1.59M | ﹤0.01% |
+257,918
| New | +$1.56M |
|
2011
PUT
Stratasys
SSYS
$697M
| $1.59M | ﹤0.01% |
769
+381
| +98% | +$6.12K |
|
2012
PUT
Yelp
YELP
$1.38B
| $1.59M | ﹤0.01% |
487
-256
| -34% | -$6.72K |
|
2013
Direxion Daily FTSE China Bull 3X ETF
YINN
$660M
| $1.59M | ﹤0.01% |
3,941
-211
| -5% | -$79.1K |
|
2014
PUT
Microvision
MVIS
$88.2M
| $1.59M | ﹤0.01% |
2,954
+2,770
| +1,505% | +$8.15K |
|
2015
Americold
COLD
$4.09B
| $1.59M | ﹤0.01% |
+42,533
| New | +$1.53M |
|
|
VSTO
2016
CALL
DELISTED
Vista Outdoor Inc.
VSTO
| $1.58M | ﹤0.01% |
665
+425
| +177% | +$9.07K |
|
2017
CALL
Nasdaq
NDAQ
$51.5B
| $1.58M | ﹤0.01% |
357
-126
| -26% | -$5.33K |
|
2018
Camping World
CWH
$363M
| $1.58M | ﹤0.01% |
+60,513
| New | +$1.77M |
|
2019
CALL
Monolithic Power Systems
MPWR
$65.5B
| $1.57M | ﹤0.01% |
43
+37
| +617% | +$11.9K |
|
2020
PUT
Banco Bradesco
BBD
$38.1B
| $1.57M | ﹤0.01% |
3,503
-48
| -1% | -$175 |
|
2021
Alamos Gold
AGI
$12.4B
| $1.57M | ﹤0.01% |
179,536
+80,184
| +81% | +$712K |
|
2022
PUT
ImmunityBio
IBRX
$7.44B
| $1.57M | ﹤0.01% |
1,178
+695
| +144% | +$6.68K |
|
2023
GoodRx Holdings
GDRX
$1B
| $1.56M | ﹤0.01% |
38,704
+34,303
| +779% | +$1.58M |
|
2024
CALL
Ameris Bancorp
ABCB
$5.89B
| $1.56M | ﹤0.01% |
410
+219
| +115% | +$7.09K |
|
2025
PUT
eHealth
EHTH
$42.5M
| $1.56M | ﹤0.01% |
221
+34
| +18% | +$2.58K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.