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 | |
|---|---|---|---|---|---|---|
1101
PUT
Blackstone Mortgage Trust
BXMT
$2.78B
| $4.24M | 0.01% |
1,539
+726
| +89% | +$18.3K |
|
1102
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
$294M
| $4.23M | 0.01% |
257,827
+95,308
| +59% | +$1.56M |
|
1103
Ferrari
RACE
$63.2B
| $4.23M | 0.01% |
18,429
-324
| -2% | -$66.1K |
|
1104
CALL
Cummins
CMI
$91.8B
| $4.22M | 0.01% |
186
-10
| -5% | -$2.25K |
|
1105
PUT
Diageo
DEO
$45.7B
| $4.22M | 0.01% |
266
+49
| +23% | +$7.31K |
|
1106
Rio Tinto
RIO
$149B
| $4.22M | 0.01% |
+56,152
| New | +$3.69M |
|
1107
CALL
Steel Dynamics
STLD
$34.7B
| $4.22M | 0.01% |
1,144
+390
| +52% | +$13.5K |
|
1108
CALL
MACOM Technology Solutions
MTSI
$21.6B
| $4.22M | 0.01% |
766
+659
| +616% | +$28.1K |
|
1109
CALL
RB Global
RBA
$20.3B
| $4.21M | 0.01% |
606
-251
| -29% | -$16.6K |
|
1110
CALL
Camping World
CWH
$358M
| $4.21M | 0.01% |
1,617
-330
| -17% | -$9.65K |
|
1111
PUT
Cinemark Holdings
CNK
$3.82B
| $4.21M | 0.01% |
2,419
+1,850
| +325% | +$23.3K |
|
|
GOOS
1112
PUT
Canada Goose Holdings
GOOS
$896M
| $4.21M | 0.01% |
1,414
-270
| -16% | -$9K |
|
1113
CALL
United Parks & Resorts
PRKS
$2.08B
| $4.2M | 0.01% |
1,331
-207
| -13% | -$5.39K |
|
1114
CALL
Shift4
FOUR
$3.68B
| $4.2M | 0.01% |
557
+321
| +136% | +$19.2K |
|
1115
CALL
Waste Management
WM
$95.3B
| $4.2M | 0.01% |
356
-301
| -46% | -$35.1K |
|
|
HZNP
1116
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $4.2M | 0.01% |
57,376
+41,925
| +271% | +$3.12M |
|
|
EB
1117
DELISTED
Eventbrite
EB
| $4.2M | 0.01% |
231,857
+174,499
| +304% | +$2.44M |
|
|
AZPN
1118
PUT
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $4.19M | 0.01% |
322
-70
| -18% | -$912K |
|
|
SF
1119
CALL
Stifel
SF
$12.1B
| $4.18M | 0.01% |
831
+525
| +172% | +$15.6K |
|
1120
CALL
Boyd Gaming
BYD
$6.43B
| $4.18M | 0.01% |
975
-594
| -38% | -$21.8K |
|
1121
PUT
Vroom Inc
VRM
$38.1M
| $4.18M | 0.01% |
13
+8
| +160% | +$26.4K |
|
1122
CALL
Baxter International
BAX
$11.2B
| $4.17M | 0.01% |
520
-489
| -48% | -$38.7K |
|
|
TTCF
1123
CALL
DELISTED
Tattooed Chef, Inc Class A Common Stock
TTCF
| $4.17M | 0.01% |
1,823
-28
| -2% | -$553 |
|
|
1124
PUT
Shift4
FOUR
$3.68B
| $4.17M | 0.01% |
553
+348
| +170% | +$20.8K |
|
1125
BP
BP
$113B
| $4.16M | 0.01% |
202,644
+64,185
| +46% | +$1.21M |
|
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.