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 | |
|---|---|---|---|---|---|---|
|
CLCT
3301
PUT
DELISTED
Collectors Universe
CLCT
| $550K | ﹤0.01% |
73
-163
| -69% | -$11.1K |
|
|
AXNX
3302
PUT
DELISTED
Axonics, Inc. Common Stock
AXNX
| $549K | ﹤0.01% |
110
-11
| -9% | -$516 |
|
|
AVYA
3303
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $549K | ﹤0.01% |
28,715
-9,281
| -24% | -$172K |
|
|
QELL
3304
PUT
DELISTED
Qell Acquisition Corp. Class A Ordinary Shares
QELL
| $548K | ﹤0.01% |
+446
| New | +$5.26K |
|
3305
CleanSpark
CLSK
$3.6B
| $546K | ﹤0.01% |
+18,826
| New | +$240K |
|
3306
PUT
Nu Skin
NUS
$250M
| $546K | ﹤0.01% |
100
+51
| +104% | +$2.68K |
|
3307
PUT
Commerce Bancshares
CBSH
$8.49B
| $545K | ﹤0.01% |
+106
| New | +$5.13K |
|
3308
MannKind Corp
MNKD
$1.22B
| $545K | ﹤0.01% |
174,213
+160,719
| +1,191% | +$421K |
|
3309
PUT
Cooper Companies
COO
$13.7B
| $544K | ﹤0.01% |
60
-44
| -42% | -$3.78K |
|
3310
PUT
United States 12 Month Oil Fund,
USL
$44.8M
| $544K | ﹤0.01% |
317
-179
| -36% | -$2.79K |
|
3311
Bright Horizons
BFAM
$4.1B
| $543K | ﹤0.01% |
3,140
-6,807
| -68% | -$1.11M |
|
3312
PUT
Coca-Cola Europacific Partners
CCEP
$48.1B
| $543K | ﹤0.01% |
109
-9
| -8% | -$380 |
|
3313
CALL
BRC Group Holdings
RILY
$273M
| $543K | ﹤0.01% |
123
+102
| +486% | +$3.29K |
|
|
FREE
3314
PUT
DELISTED
Whole Earth Brands, Inc. Class A Common Stock
FREE
| $543K | ﹤0.01% |
499
+48
| +11% | +$439 |
|
3315
Align Technology
ALGN
$12B
| $542K | ﹤0.01% |
1,015
-11,327
| -92% | -$5.09M |
|
3316
iShares MSCI Mexico ETF
EWW
$1.91B
| $542K | ﹤0.01% |
12,610
-21,417
| -63% | -$832K |
|
3317
PUT
Performance Food Group
PFGC
$18B
| $542K | ﹤0.01% |
114
+104
| +1,040% | +$4.38K |
|
3318
Root
ROOT
$944M
| $542K | ﹤0.01% |
+1,919
| New | +$633K |
|
3319
CALL
Semtech
SMTC
$11.3B
| $540K | ﹤0.01% |
75
+29
| +63% | +$1.85K |
|
3320
Madrigal Pharmaceuticals
MDGL
$12.7B
| $539K | ﹤0.01% |
4,850
-4,739
| -49% | -$579K |
|
3321
PUT
Energous
WATT
$78.7M
| $539K | ﹤0.01% |
5
+4
| +400% | +$5.28K |
|
3322
CF Industries
CF
$18.4B
| $538K | ﹤0.01% |
13,906
-17,798
| -56% | -$587K |
|
3323
PUT
Everest Group
EG
$15.4B
| $538K | ﹤0.01% |
+23
| New | +$5.08K |
|
3324
Mitek Systems
MITK
$768M
| $538K | ﹤0.01% |
30,297
+22,498
| +288% | +$311K |
|
3325
STAAR Surgical
STAA
$1.14B
| $538K | ﹤0.01% |
6,792
-10,168
| -60% | -$744K |
|
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.