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 | |
|---|---|---|---|---|---|---|
1901
PUT
JetBlue
JBLU
$1.96B
| $1.76M | ﹤0.01% |
1,209
-189
| -14% | -$2.59K |
|
1902
CALL
Yelp
YELP
$1.38B
| $1.76M | ﹤0.01% |
538
-2
| -0.4% | -$53 |
|
1903
PUT
Huntington Ingalls Industries
HII
$11.3B
| $1.75M | ﹤0.01% |
103
-17
| -14% | -$2.7K |
|
1904
CALL
Dover
DOV
$27.2B
| $1.75M | ﹤0.01% |
139
-198
| -59% | -$23.5K |
|
1905
PUT
Polaris
PII
$4.15B
| $1.75M | ﹤0.01% |
184
+164
| +820% | +$15.7K |
|
|
MAG
1906
CALL
DELISTED
MAG Silver
MAG
| $1.75M | ﹤0.01% |
854
+593
| +227% | +$10.2K |
|
1907
Planet Fitness
PLNT
$4.23B
| $1.75M | ﹤0.01% |
22,572
-19,850
| -47% | -$1.39M |
|
|
STL
1908
CALL
DELISTED
Sterling Bancorp
STL
| $1.75M | ﹤0.01% |
974
+731
| +301% | +$11K |
|
1909
CALL
FTAI Aviation
FTAI
$22.2B
| $1.75M | ﹤0.01% |
874
+500
| +134% | +$8.35K |
|
|
HIBB
1910
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $1.75M | ﹤0.01% |
379
+79
| +26% | +$3.53K |
|
1911
QuantumScape Corp
QS
$3B
| $1.75M | ﹤0.01% |
20,709
+10,680
| +106% | +$391K |
|
|
MRO
1912
CALL
DELISTED
Marathon Oil Corporation
MRO
| $1.75M | ﹤0.01% |
2,618
-2,524
| -49% | -$13.6K |
|
1913
Progressive
PGR
$124B
| $1.74M | ﹤0.01% |
+17,610
| New | +$1.67M |
|
|
SNV
1914
PUT
DELISTED
Synovus
SNV
| $1.74M | ﹤0.01% |
538
+328
| +156% | +$9.49K |
|
1915
NetEase
NTES
$76.5B
| $1.74M | ﹤0.01% |
18,174
-2,831
| -13% | -$254K |
|
1916
CALL
Quest Diagnostics
DGX
$25.1B
| $1.74M | ﹤0.01% |
146
-169
| -54% | -$20.6K |
|
|
SGMO
1917
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $1.74M | ﹤0.01% |
1,115
+174
| +18% | +$2.04K |
|
1918
CALL
Campbell Soup
CPB
$6.51B
| $1.74M | ﹤0.01% |
359
-5
| -1% | -$242 |
|
1919
CALL
InMode
INMD
$872M
| $1.73M | ﹤0.01% |
730
+324
| +80% | +$6.85K |
|
1920
CALL
MillerKnoll
MLKN
$1.5B
| $1.73M | ﹤0.01% |
513
-313
| -38% | -$10.9K |
|
1921
PUT
Tanger
SKT
$4.82B
| $1.73M | ﹤0.01% |
1,740
+483
| +38% | +$4.08K |
|
1922
CALL
Invesco Aerospace & Defense ETF
PPA
$8.27B
| $1.73M | ﹤0.01% |
184
-223
| -55% | -$13.9K |
|
|
BHVN
1923
CALL
DELISTED
Biohaven Pharmaceutical Holding Company Ltd.
BHVN
| $1.73M | ﹤0.01% |
202
+99
| +96% | +$8.39K |
|
1924
American Eagle Outfitters
AEO
$2.85B
| $1.73M | ﹤0.01% |
+86,120
| New | +$1.45M |
|
1925
CALL
Lithia Motors
LAD
$7.78B
| $1.73M | ﹤0.01% |
59
-75
| -56% | -$20.5K |
|
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.