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 | |
|---|---|---|---|---|---|---|
|
126
Invesco QQQ Trust
QQQ
$471B
| $70.6M | 0.09% |
224,897
+132,942
| +145% | +$39M |
|
127
PUT
AbbVie
ABBV
$448B
| $69.3M | 0.09% |
6,472
+2,466
| +62% | +$237K |
|
128
CALL
AT&T
T
$155B
| $68.6M | 0.09% |
31,577
+9,430
| +43% | +$203K |
|
129
CALL
Snap
SNAP
$7.67B
| $68.6M | 0.09% |
13,693
-2,640
| -16% | -$110K |
|
130
PUT
Trade Desk
TTD
$8.58B
| $68.2M | 0.09% |
8,510
+420
| +5% | +$31.7K |
|
131
PUT
Atlassian
TEAM
$23B
| $66.7M | 0.09% |
2,853
+794
| +39% | +$168K |
|
132
PUT
Coca-Cola
KO
$353B
| $66.5M | 0.09% |
12,130
-4,726
| -28% | -$244K |
|
|
133
PUT
AT&T
T
$155B
| $65.5M | 0.08% |
30,138
-8,553
| -22% | -$184K |
|
134
PUT
Moderna
MRNA
$23.7B
| $64.3M | 0.08% |
+6,151
| New | +$622K |
|
|
TWTR
135
CALL
DELISTED
Twitter, Inc.
TWTR
| $64.2M | 0.08% |
11,863
+350
| +3% | +$16.7K |
|
136
PUT
Pinterest
PINS
$12.8B
| $64.2M | 0.08% |
9,740
+2,430
| +33% | +$146K |
|
137
PUT
Vanguard S&P 500 ETF
VOO
$981B
| $63.3M | 0.08% |
4,705
+588
| +14% | +$192K |
|
138
CALL
IBM
IBM
$198B
| $63.3M | 0.08% |
6,283
+2,511
| +67% | +$290K |
|
139
CALL
Procter & Gamble
PG
$345B
| $63.2M | 0.08% |
4,545
-2,009
| -31% | -$281K |
|
140
PUT
Target
TGT
$63.4B
| $62.4M | 0.08% |
3,533
+116
| +3% | +$19.3K |
|
141
PUT
Bank of America
BAC
$430B
| $62M | 0.08% |
20,448
-10,312
| -34% | -$276K |
|
142
CALL
Chevron
CVX
$381B
| $61.6M | 0.08% |
7,290
-1,766
| -20% | -$143K |
|
143
PUT
Etsy
ETSY
$7.97B
| $61.4M | 0.08% |
3,453
-120
| -3% | -$18K |
|
|
144
CALL
Bank of America
BAC
$430B
| $60.7M | 0.08% |
20,023
-9,419
| -32% | -$252K |
|
145
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$247M
| $60.6M | 0.08% |
50,572
+4,732
| +10% | +$35.7K |
|
|
146
CALL
Coca-Cola
KO
$353B
| $60.6M | 0.08% |
11,046
-3,148
| -22% | -$163K |
|
147
CALL
Wynn Resorts
WYNN
$9.93B
| $60.4M | 0.08% |
5,355
-649
| -11% | -$59.9K |
|
148
PUT
CrowdStrike
CRWD
$195B
| $59.5M | 0.08% |
11,228
-6,804
| -38% | -$265K |
|
149
CALL
United Airlines
UAL
$38.2B
| $59.4M | 0.08% |
13,743
+2,522
| +22% | +$102K |
|
150
PUT
Biogen
BIIB
$29.5B
| $59.4M | 0.08% |
2,424
+767
| +46% | +$198K |
|
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.