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 | |
|---|---|---|---|---|---|---|
101
CALL
JD.com
JD
$41.1B
| $87.4M | 0.11% |
9,941
-768
| -7% | -$64.1K |
|
102
CALL
Peloton Interactive
PTON
$2.82B
| $87.3M | 0.11% |
5,751
-605
| -10% | -$73.7K |
|
103
PUT
United States Oil Fund
USO
$2.31B
| $87.2M | 0.11% |
26,402
-8,006
| -23% | -$237K |
|
104
CALL
iShares Morningstar Value ETF
ILCV
$1.3B
| $85.4M | 0.11% |
30,140
-5,726
| -16% | -$303K |
|
105
CALL
Biogen
BIIB
$29.5B
| $84.9M | 0.11% |
3,468
+1,646
| +90% | +$425K |
|
106
PUT
Caterpillar
CAT
$410B
| $84.5M | 0.11% |
4,642
+705
| +18% | +$120K |
|
107
CALL
Starbucks
SBUX
$119B
| $84.3M | 0.11% |
7,877
-788
| -9% | -$75.2K |
|
108
PUT
Palantir
PLTR
$318B
| $83M | 0.11% |
+35,242
| New | +$630K |
|
109
CALL
Lowe's Companies
LOW
$115B
| $82.5M | 0.11% |
5,140
+2,818
| +121% | +$458K |
|
110
CALL
ExxonMobil
XOM
$629B
| $82.5M | 0.11% |
20,009
+645
| +3% | +$24.2K |
|
111
CALL
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $81.4M | 0.11% |
13,797
-6,144
| -31% | -$189K |
|
|
112
Amazon
AMZN
$2.66T
| $81.2M | 0.11% |
498,360
-154,820
| -24% | -$24.7M |
|
113
CALL
Citigroup
C
$216B
| $80.6M | 0.1% |
13,075
-4,490
| -26% | -$228K |
|
114
PUT
Procter & Gamble
PG
$345B
| $80.2M | 0.1% |
5,765
-499
| -8% | -$69.7K |
|
115
PUT
Johnson & Johnson
JNJ
$599B
| $79.1M | 0.1% |
5,028
-688
| -12% | -$102K |
|
116
PUT
FedEx
FDX
$73.1B
| $79M | 0.1% |
3,041
-1,216
| -29% | -$337K |
|
117
CALL
Pfizer
PFE
$142B
| $78.9M | 0.1% |
40,247
+6,928
| +21% | +$254K |
|
118
PUT
Snap
SNAP
$7.67B
| $78.4M | 0.1% |
15,654
+3,209
| +26% | +$133K |
|
|
119
CALL
FedEx
FDX
$73.1B
| $78.2M | 0.1% |
3,011
-614
| -17% | -$170K |
|
|
TWTR
120
PUT
DELISTED
Twitter, Inc.
TWTR
| $75.9M | 0.1% |
14,023
-3,152
| -18% | -$150K |
|
121
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $75M | 0.1% |
13,803
-3,799
| -22% | -$487K |
|
|
122
CALL
TSMC
TSM
$2.2T
| $73.2M | 0.09% |
6,715
-1,040
| -13% | -$98.6K |
|
123
PUT
McDonald's
MCD
$188B
| $71.9M | 0.09% |
3,353
-9
| -0.3% | -$1.96K |
|
124
CALL
Wells Fargo
WFC
$266B
| $71.4M | 0.09% |
23,655
-957
| -4% | -$24.8K |
|
|
125
PUT
TSMC
TSM
$2.2T
| $70.6M | 0.09% |
6,473
-5,914
| -48% | -$561K |
|
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.