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 | |
|---|---|---|---|---|---|---|
1126
DexCom
DXCM
$27.2B
| $4.15M | 0.01% |
44,888
+10,876
| +32% | +$971K |
|
1127
US Global Jets ETF
JETS
$781M
| $4.14M | 0.01% |
185,213
-10,113
| -5% | -$204K |
|
1128
PUT
Baxter International
BAX
$11.2B
| $4.14M | 0.01% |
516
-112
| -18% | -$8.87K |
|
1129
CALL
Scotiabank
BNS
$106B
| $4.14M | 0.01% |
766
-378
| -33% | -$17.9K |
|
1130
PUT
Mattel
MAT
$4.14B
| $4.12M | 0.01% |
2,362
-1,988
| -46% | -$29.3K |
|
|
AMWD
1131
PUT
DELISTED
American Woodmark
AMWD
| $4.12M | 0.01% |
439
+351
| +399% | +$31.9K |
|
1132
CALL
Gartner
IT
$8.95B
| $4.12M | 0.01% |
257
+50
| +24% | +$7.2K |
|
1133
CALL
Bath & Body Works
BBWI
$3.9B
| $4.11M | 0.01% |
1,368
-380
| -22% | -$11K |
|
1134
CALL
Bunge Global
BG
$23.7B
| $4.11M | 0.01% |
627
-19
| -3% | -$1.11K |
|
|
SRNE
1135
CALL
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $4.11M | 0.01% |
6,021
-2,006
| -25% | -$16.1K |
|
1136
PUT
Gen Digital
GEN
$15.1B
| $4.11M | 0.01% |
1,977
-423
| -18% | -$8.54K |
|
1137
CALL
American Eagle Outfitters
AEO
$2.86B
| $4.1M | 0.01% |
2,043
-1,031
| -34% | -$17.3K |
|
1138
PUT
Edison International
EIX
$30.6B
| $4.09M | 0.01% |
651
+83
| +15% | +$5K |
|
1139
CALL
PG&E
PCG
$38.6B
| $4.09M | 0.01% |
3,281
-2,179
| -40% | -$24.6K |
|
1140
PUT
Sony
SONY
$122B
| $4.07M | 0.01% |
2,015
+190
| +10% | +$3.3K |
|
|
RP
1141
CALL
DELISTED
RealPage, Inc.
RP
| $4.07M | 0.01% |
467
+297
| +175% | +$19.5K |
|
|
CMA
1142
PUT
DELISTED
Comerica
CMA
| $4.06M | 0.01% |
727
-247
| -25% | -$12K |
|
1143
iShares MSCI Australia ETF
EWA
$1.33B
| $4.05M | 0.01% |
169,174
-36,656
| -18% | -$811K |
|
1144
PUT
M&T Bank
MTB
$35.6B
| $4.05M | 0.01% |
318
-120
| -27% | -$13.7K |
|
|
WRK
1145
CALL
DELISTED
WestRock Company
WRK
| $4.05M | 0.01% |
930
-540
| -37% | -$22.3K |
|
1146
CALL
Marathon Digital Holdings
MARA
$4.87B
| $4.04M | 0.01% |
3,872
+2,256
| +140% | +$10.4K |
|
1147
PUT
Diamondback Energy
FANG
$57.8B
| $4.04M | 0.01% |
834
+238
| +40% | +$8.8K |
|
1148
CALL
Oneok
OKE
$58.7B
| $4.03M | 0.01% |
1,051
-544
| -34% | -$18.3K |
|
1149
CALL
Kraft Heinz
KHC
$30.1B
| $4.02M | 0.01% |
1,161
-448
| -28% | -$14.5K |
|
|
P
1150
CALL
Everpure Inc
P
$25B
| $4.02M | 0.01% |
1,780
+12
| +0.7% | +$230 |
|
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.