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 | |
|---|---|---|---|---|---|---|
601
Berkshire Hathaway Class B
BRK.B
$1.06T
| $9.87M | 0.01% |
42,575
-1,158
| -3% | -$255K |
|
602
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.82B
| $9.82M | 0.01% |
135,965
+121,560
| +844% | +$7.53M |
|
603
CALL
Southern Company
SO
$108B
| $9.82M | 0.01% |
1,598
-1,540
| -49% | -$92.6K |
|
604
Royal Caribbean
RCL
$76.7B
| $9.79M | 0.01% |
131,060
+19,321
| +17% | +$1.35M |
|
605
PUT
Blink Charging
BLNK
$79.5M
| $9.7M | 0.01% |
2,268
+1,833
| +421% | +$36.2K |
|
606
CALL
Ally Financial
ALLY
$13.7B
| $9.61M | 0.01% |
2,695
+1,124
| +72% | +$34K |
|
|
XLNX
607
CALL
DELISTED
Xilinx Inc
XLNX
| $9.6M | 0.01% |
677
-687
| -50% | -$89.3K |
|
608
PUT
Rocket Companies
RKT
$38B
| $9.57M | 0.01% |
4,732
+1,153
| +32% | +$24.3K |
|
609
PUT
Ralph Lauren
RL
$23B
| $9.56M | 0.01% |
922
-188
| -17% | -$15.8K |
|
610
PUT
AB InBev
BUD
$161B
| $9.56M | 0.01% |
1,368
+411
| +43% | +$26K |
|
611
CALL
Aon
AON
$75.2B
| $9.55M | 0.01% |
452
+184
| +69% | +$37.6K |
|
612
PUT
VF Corp
VFC
$6.74B
| $9.55M | 0.01% |
1,118
+170
| +18% | +$13.6K |
|
613
CALL
Arrowhead Research
ARWR
$12.5B
| $9.5M | 0.01% |
1,238
+661
| +115% | +$42.3K |
|
614
CALL
VanEck Durable High Dividend ETF
DURA
$38.5M
| $9.49M | 0.01% |
665
-587
| -47% | -$16.4K |
|
615
CALL
EOG Resources
EOG
$76.7B
| $9.48M | 0.01% |
1,901
+925
| +95% | +$40.2K |
|
616
PUT
Hasbro
HAS
$12.6B
| $9.43M | 0.01% |
1,008
+345
| +52% | +$30.7K |
|
|
GAP
617
PUT
The Gap Inc
GAP
$7.07B
| $9.41M | 0.01% |
4,659
-574
| -11% | -$12.1K |
|
|
AYX
618
CALL
DELISTED
Alteryx Inc
AYX
| $9.37M | 0.01% |
769
-29
| -4% | -$3.65K |
|
619
CALL
iQIYI
IQ
$1.2B
| $9.35M | 0.01% |
5,351
+1,930
| +56% | +$43.5K |
|
620
PUT
Duke Energy
DUK
$99.7B
| $9.28M | 0.01% |
1,014
-405
| -29% | -$37.5K |
|
621
CALL
Analog Devices
ADI
$188B
| $9.28M | 0.01% |
628
-88
| -12% | -$11.7K |
|
622
CALL
Ford
F
$57.5B
| $9.28M | 0.01% |
10,555
+2,324
| +28% | +$19.5K |
|
623
PUT
Ventas
VTR
$47.2B
| $9.26M | 0.01% |
1,888
+299
| +19% | +$13.8K |
|
624
PUT
Live Nation Entertainment
LYV
$41.4B
| $9.24M | 0.01% |
1,258
-494
| -28% | -$31.2K |
|
625
CALL
FirstEnergy
FE
$28.5B
| $9.22M | 0.01% |
3,011
+978
| +48% | +$29.3K |
|
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.