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 | |
|---|---|---|---|---|---|---|
2076
CALL
Tactile Systems Technology
TCMD
$620M
| $1.5M | ﹤0.01% |
333
+328
| +6,560% | +$13K |
|
2077
CALL
Ultragenyx Pharmaceutical
RARE
$2.65B
| $1.5M | ﹤0.01% |
108
+106
| +5,300% | +$12.6K |
|
2078
Rocket Companies
RKT
$36.9B
| $1.5M | ﹤0.01% |
73,971
+71,571
| +2,982% | +$1.51M |
|
2079
CALL
Sprouts Farmers Market
SFM
$7.04B
| $1.5M | ﹤0.01% |
744
-118
| -14% | -$2.42K |
|
2080
CALL
SL Green Realty
SLG
$3.88B
| $1.49M | ﹤0.01% |
244
-103
| -30% | -$5.45K |
|
2081
PUT
Apollo Global Management
APO
$70.7B
| $1.49M | ﹤0.01% |
305
-61
| -17% | -$2.72K |
|
2082
CALL
Zumiez
ZUMZ
$320M
| $1.49M | ﹤0.01% |
406
+36
| +10% | +$1.21K |
|
|
MMP
2083
PUT
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $1.49M | ﹤0.01% |
352
-127
| -27% | -$5.07K |
|
2084
PUT
Brighthouse Financial
BHF
$3.63B
| $1.49M | ﹤0.01% |
411
-49
| -11% | -$1.65K |
|
2085
PUT
Douglas Emmett
DEI
$2.06B
| $1.49M | ﹤0.01% |
510
-9
| -2% | -$256 |
|
2086
CALL
Mattel
MAT
$4.17B
| $1.49M | ﹤0.01% |
852
+208
| +32% | +$3.06K |
|
2087
PUT
United Natural Foods
UNFI
$3.01B
| $1.49M | ﹤0.01% |
931
-84
| -8% | -$1.41K |
|
2088
CALL
Pitney Bowes
PBI
$2.42B
| $1.48M | ﹤0.01% |
2,410
+1,746
| +263% | +$10.5K |
|
|
GES
2089
PUT
DELISTED
Guess Inc
GES
| $1.48M | ﹤0.01% |
655
-307
| -32% | -$4.84K |
|
2090
PUT
Robert Half
RHI
$3.61B
| $1.48M | ﹤0.01% |
237
-669
| -74% | -$39.9K |
|
|
NEWR
2091
CALL
DELISTED
New Relic, Inc.
NEWR
| $1.48M | ﹤0.01% |
226
-115
| -34% | -$7.09K |
|
2092
CALL
Itron
ITRI
$3.73B
| $1.48M | ﹤0.01% |
154
+62
| +67% | +$4.77K |
|
2093
Welltower
WELL
$178B
| $1.48M | ﹤0.01% |
22,830
+5,704
| +33% | +$346K |
|
2094
iShares 7-10 Year Treasury Bond ETF
IEF
$47.1B
| $1.47M | ﹤0.01% |
+12,295
| New | +$1.48M |
|
|
2095
PUT
Pitney Bowes
PBI
$2.42B
| $1.47M | ﹤0.01% |
2,393
+249
| +12% | +$1.5K |
|
2096
iShares Core S&P Mid-Cap ETF
IJH
$123B
| $1.47M | ﹤0.01% |
+32,050
| New | +$1.35M |
|
|
ODP
2097
CALL
DELISTED
ODP
ODP
| $1.47M | ﹤0.01% |
503
-316
| -39% | -$7.99K |
|
2098
Corpay
CPAY
$24.2B
| $1.47M | ﹤0.01% |
+5,377
| New | +$1.38M |
|
|
FOCS
2099
CALL
DELISTED
Focus Financial Partners Inc. Class A
FOCS
| $1.47M | ﹤0.01% |
337
+333
| +8,325% | +$13.4K |
|
|
TWOU
2100
PUT
DELISTED
2U Inc
TWOU
| $1.46M | ﹤0.01% |
12
-4
| -25% | -$4.29K |
|
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.