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 | |
|---|---|---|---|---|---|---|
|
BZUN
1501
PUT
Baozun
BZUN
$144M
| $2.61M | ﹤0.01% |
760
+13
| +2% | +$477 |
|
1502
PUT
Masco
MAS
$16B
| $2.61M | ﹤0.01% |
475
+13
| +3% | +$716 |
|
|
WW
1503
CALL
DELISTED
WW International
WW
| $2.6M | ﹤0.01% |
1,068
+472
| +79% | +$12.3K |
|
1504
PUT
Cleveland-Cliffs
CLF
$6.81B
| $2.6M | ﹤0.01% |
1,789
+797
| +80% | +$8.07K |
|
1505
PUT
Teck Resources
TECK
$29.5B
| $2.6M | ﹤0.01% |
1,435
-2,662
| -65% | -$41K |
|
1506
PUT
WEC Energy
WEC
$37.7B
| $2.6M | ﹤0.01% |
282
+189
| +203% | +$18.4K |
|
1507
Direxion Daily Technology Bull 3x ETF
TECL
$5.14B
| $2.59M | ﹤0.01% |
63,820
+31,820
| +99% | +$1.08M |
|
1508
Deere & Co
DE
$170B
| $2.58M | ﹤0.01% |
+9,596
| New | +$2.38M |
|
1509
PUT
Deckers Outdoor
DECK
$13.3B
| $2.58M | ﹤0.01% |
540
+198
| +58% | +$8.78K |
|
|
FSR
1510
PUT
DELISTED
Fisker Inc.
FSR
| $2.58M | ﹤0.01% |
1,758
+837
| +91% | +$12.3K |
|
1511
CALL
Fortuna Silver Mines
FSM
$2.59B
| $2.57M | ﹤0.01% |
3,123
+1,226
| +65% | +$8.49K |
|
1512
PUT
Intellia Therapeutics
NTLA
$1.5B
| $2.57M | ﹤0.01% |
473
+365
| +338% | +$13.3K |
|
1513
CALL
Asana
ASAN
$1.58B
| $2.57M | ﹤0.01% |
+870
| New | +$22.2K |
|
1514
CALL
Tower Semiconductor
TSEM
$26.4B
| $2.57M | ﹤0.01% |
995
+75
| +8% | +$1.71K |
|
1515
CALL
Yum China
YUMC
$14.9B
| $2.56M | ﹤0.01% |
449
-684
| -60% | -$38.4K |
|
1516
CALL
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $2.56M | ﹤0.01% |
216
+2
| +0.9% | +$508 |
|
1517
PUT
Sibanye-Stillwater
SBSW
$5.92B
| $2.56M | ﹤0.01% |
1,612
-732
| -31% | -$9.85K |
|
1518
Pan American Silver
PAAS
$18.6B
| $2.56M | ﹤0.01% |
74,042
+6,181
| +9% | +$200K |
|
1519
PUT
AerCap
AER
$23.9B
| $2.55M | ﹤0.01% |
560
+160
| +40% | +$5.58K |
|
1520
Best Buy
BBY
$18B
| $2.55M | ﹤0.01% |
25,576
+18,316
| +252% | +$2.05M |
|
1521
PUT
Illinois Tool Works
ITW
$81.4B
| $2.55M | ﹤0.01% |
125
+82
| +191% | +$16.8K |
|
1522
CALL
FIVE9
FIVN
$1.77B
| $2.55M | ﹤0.01% |
146
+21
| +17% | +$3.19K |
|
1523
CALL
Welltower
WELL
$178B
| $2.55M | ﹤0.01% |
394
-404
| -51% | -$24.5K |
|
|
VLDR
1524
CALL
DELISTED
Velodyne Lidar, Inc. Common Stock
VLDR
| $2.55M | ﹤0.01% |
+1,116
| New | +$19K |
|
|
CHL
1525
DELISTED
China Mobile Limited
CHL
| $2.54M | ﹤0.01% |
89,145
+43,076
| +94% | +$1.33M |
|
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.