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 | |
|---|---|---|---|---|---|---|
151
CALL
Chipotle Mexican Grill
CMG
$42.1B
| $59.4M | 0.08% |
21,400
-4,800
| -18% | -$126K |
|
152
CALL
UnitedHealth
UNH
$393B
| $59M | 0.08% |
1,682
+712
| +73% | +$239K |
|
153
PUT
American Airlines Group
AAL
$10.1B
| $58.4M | 0.08% |
37,045
+14,504
| +64% | +$201K |
|
154
PUT
Nike
NKE
$62.3B
| $58.4M | 0.08% |
4,129
-1,167
| -22% | -$155K |
|
155
PUT
Comcast
CMCSA
$85.2B
| $57.7M | 0.07% |
11,004
+4,186
| +61% | +$201K |
|
156
PUT
Teladoc Health
TDOC
$1.63B
| $57.3M | 0.07% |
2,865
+493
| +21% | +$100K |
|
157
CALL
Caterpillar
CAT
$415B
| $57M | 0.07% |
3,129
-54
| -2% | -$9.16K |
|
158
CALL
Zillow
Z
$7.2B
| $56.8M | 0.07% |
4,335
-779
| -15% | -$86.2K |
|
159
PUT
IBM
IBM
$197B
| $56.2M | 0.07% |
4,669
+1,323
| +40% | +$153K |
|
160
PUT
Wynn Resorts
WYNN
$9.85B
| $55.8M | 0.07% |
4,944
+372
| +8% | +$34.3K |
|
161
PUT
Autodesk
ADSK
$43.2B
| $55M | 0.07% |
1,802
-51
| -3% | -$13.4K |
|
162
CALL
Home Depot
HD
$332B
| $55M | 0.07% |
2,070
-2,043
| -50% | -$562K |
|
163
PUT
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$252M
| $54.6M | 0.07% |
50,332
+2,240
| +5% | +$16.9K |
|
164
PUT
ExxonMobil
XOM
$638B
| $54.4M | 0.07% |
13,202
-13,626
| -51% | -$511K |
|
165
CALL
Palantir
PLTR
$304B
| $54M | 0.07% |
+22,933
| New | +$410K |
|
166
PUT
American Express
AXP
$238B
| $53.7M | 0.07% |
4,442
+852
| +24% | +$94.4K |
|
|
ATVI
167
PUT
DELISTED
Activision Blizzard
ATVI
| $53.6M | 0.07% |
5,769
-935
| -14% | -$75.9K |
|
168
PUT
QuantumScape Corp
QS
$3.7B
| $52.3M | 0.07% |
6,195
+5,872
| +1,818% | +$215K |
|
169
CALL
Morgan Stanley
MS
$345B
| $51.7M | 0.07% |
7,547
+709
| +10% | +$40.7K |
|
170
PUT
Zscaler
ZS
$23.3B
| $51M | 0.07% |
2,555
+83
| +3% | +$13.2K |
|
171
CALL
ServiceNow
NOW
$99.7B
| $50.7M | 0.07% |
4,610
-195
| -4% | -$20.3K |
|
172
PUT
Royal Caribbean
RCL
$77.1B
| $50M | 0.06% |
6,701
-605
| -8% | -$42.2K |
|
173
CALL
Target
TGT
$62.8B
| $49.6M | 0.06% |
2,811
+196
| +7% | +$32.7K |
|
|
174
CALL
Nike
NKE
$62.3B
| $48.6M | 0.06% |
3,434
-1,882
| -35% | -$249K |
|
175
PUT
iShares Core MSCI Emerging Markets ETF
IEMG
$153B
| $48.4M | 0.06% |
7,804
+1,435
| +23% | +$82.7K |
|
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.