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 | |
|---|---|---|---|---|---|---|
2176
Boston Scientific
BSX
$65.8B
| $1.35M | ﹤0.01% |
+37,687
| New | +$1.36M |
|
|
RBAC
2177
PUT
DELISTED
RedBall Acquisition Corp.
RBAC
| $1.35M | ﹤0.01% |
+1,244
| New | +$13K |
|
2178
CALL
Pilgrim's Pride
PPC
$6.82B
| $1.35M | ﹤0.01% |
690
+28
| +4% | +$507 |
|
2179
PUT
argenx
ARGX
$57.4B
| $1.35M | ﹤0.01% |
+46
| New | +$12.6K |
|
|
CTLT
2180
CALL
DELISTED
CATALENT, INC.
CTLT
| $1.35M | ﹤0.01% |
130
-166
| -56% | -$16.1K |
|
2181
PUT
Alnylam Pharmaceuticals
ALNY
$36.3B
| $1.35M | ﹤0.01% |
104
-210
| -67% | -$28K |
|
2182
CALL
Rogers Communications
RCI
$17.7B
| $1.35M | ﹤0.01% |
290
-61
| -17% | -$2.7K |
|
|
AWH
2183
CALL
DELISTED
Aspira Women's Health Inc. Common Stock
AWH
| $1.35M | ﹤0.01% |
134
+72
| +116% | +$4.81K |
|
2184
PUT
Kura Oncology
KURA
$922M
| $1.35M | ﹤0.01% |
413
+381
| +1,191% | +$13.4K |
|
|
SKX
2185
PUT
DELISTED
Skechers
SKX
| $1.35M | ﹤0.01% |
375
-93
| -20% | -$3.17K |
|
2186
CALL
Banco Bradesco
BBD
$38.1B
| $1.35M | ﹤0.01% |
3,099
+1,004
| +48% | +$3.67K |
|
2187
ServiceNow
NOW
$102B
| $1.34M | ﹤0.01% |
12,215
-107,610
| -90% | -$11.2M |
|
2188
PUT
Celsius Holdings
CELH
$6.93B
| $1.34M | ﹤0.01% |
801
+147
| +22% | +$1.47K |
|
|
API
2189
CALL
Agora
API
$326M
| $1.34M | ﹤0.01% |
339
+161
| +90% | +$6.65K |
|
2190
Gen Digital
GEN
$15.6B
| $1.34M | ﹤0.01% |
64,519
-19,022
| -23% | -$384K |
|
2191
PUT
Nasdaq
NDAQ
$51.5B
| $1.34M | ﹤0.01% |
303
-681
| -69% | -$28.8K |
|
2192
Dynatrace
DT
$12.1B
| $1.34M | ﹤0.01% |
30,962
+7,980
| +35% | +$317K |
|
|
CDK
2193
PUT
DELISTED
CDK Global, Inc.
CDK
| $1.34M | ﹤0.01% |
258
+166
| +180% | +$7.87K |
|
2194
PUT
Nokia
NOK
$50.8B
| $1.33M | ﹤0.01% |
3,412
-957
| -22% | -$3.77K |
|
2195
CALL
Aaon
AAON
$8.41B
| $1.33M | ﹤0.01% |
300
+297
| +9,900% | +$12.6K |
|
2196
CALL
Trex
TREX
$4.51B
| $1.33M | ﹤0.01% |
159
+35
| +28% | +$2.68K |
|
2197
PUT
Root
ROOT
$917M
| $1.33M | ﹤0.01% |
+47
| New | +$15.5K |
|
2198
Williams Companies
WMB
$90.5B
| $1.33M | ﹤0.01% |
66,307
+59,631
| +893% | +$1.21M |
|
2199
CALL
Clarivate
CLVT
$1.3B
| $1.33M | ﹤0.01% |
447
+372
| +496% | +$11K |
|
2200
CALL
Floor & Decor
FND
$5.81B
| $1.33M | ﹤0.01% |
143
+37
| +35% | +$3.09K |
|
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.