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 | |
|---|---|---|---|---|---|---|
|
AXON
1151
CALL
Axon Enterprise
AXON
$39.6B
| $4.02M | 0.01% |
328
-88
| -21% | -$10.1K |
|
1152
PUT
Credit Acceptance
CACC
$6.2B
| $4.01M | 0.01% |
116
+2
| +2% | +$653 |
|
1153
PUT
Keysight
KEYS
$55.6B
| $4.01M | 0.01% |
304
-255
| -46% | -$29.4K |
|
1154
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $4.01M | 0.01% |
34,968
+32,368
| +1,245% | +$3.63M |
|
1155
CALL
First Trust Natural Gas ETF
FCG
$636M
| $4M | 0.01% |
242
-105
| -30% | -$801 |
|
1156
PUT
Vipshop
VIPS
$6.92B
| $4M | 0.01% |
1,423
+56
| +4% | +$1.24K |
|
1157
PUT
Cintas
CTAS
$81.3B
| $3.99M | 0.01% |
452
-588
| -57% | -$51.1K |
|
1158
PUT
Lincoln National
LNC
$7.81B
| $3.99M | 0.01% |
794
+194
| +32% | +$8.25K |
|
1159
PUT
Chemours
CC
$2.63B
| $3.98M | 0.01% |
1,607
+301
| +23% | +$7.16K |
|
|
CTXS
1160
PUT
DELISTED
Citrix Systems Inc
CTXS
| $3.98M | 0.01% |
306
-178
| -37% | -$22.6K |
|
1161
PUT
Tower Semiconductor
TSEM
$29.4B
| $3.97M | 0.01% |
1,538
-200
| -12% | -$4.57K |
|
1162
CALL
Trupanion
TRUP
$1.03B
| $3.96M | 0.01% |
331
+77
| +30% | +$7.27K |
|
|
K
1163
CALL
DELISTED
Kellanova
K
| $3.95M | 0.01% |
676
-14
| -2% | -$842 |
|
1164
CALL
Pacific Biosciences
PACB
$435M
| $3.94M | 0.01% |
1,521
+1,287
| +550% | +$21.9K |
|
1165
PUT
Camping World
CWH
$358M
| $3.94M | 0.01% |
1,514
-248
| -14% | -$7.26K |
|
1166
JD.com
JD
$40.6B
| $3.94M | 0.01% |
44,783
-126,283
| -74% | -$10.5M |
|
1167
PUT
MarketAxess Holdings
MKTX
$4.06B
| $3.94M | 0.01% |
69
+63
| +1,050% | +$34.3K |
|
1168
CALL
Box
BOX
$3.92B
| $3.93M | 0.01% |
2,179
+771
| +55% | +$13.4K |
|
1169
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $3.93M | 0.01% |
238
+81
| +52% | +$12.1K |
|
1170
3M
MMM
$87.5B
| $3.92M | 0.01% |
26,839
-3,947
| -13% | -$560K |
|
1171
PUT
Planet Fitness
PLNT
$4.29B
| $3.92M | 0.01% |
505
-887
| -64% | -$62K |
|
1172
PUT
Lumen
LUMN
$6.73B
| $3.91M | 0.01% |
4,007
-2,942
| -42% | -$29K |
|
1173
CALL
Nano X Imaging
NNOX
$67.8M
| $3.89M | 0.01% |
853
+170
| +25% | +$6.93K |
|
1174
PG&E
PCG
$47B
| $3.89M | 0.01% |
312,188
+96,695
| +45% | +$1.09M |
|
1175
SLB Ltd
SLB
$70.6B
| $3.89M | 0.01% |
178,170
+128,932
| +262% | +$2.43M |
|
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.