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 | |
|---|---|---|---|---|---|---|
2026
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$332M
| $1.56M | ﹤0.01% |
+3,990
| New | +$1.9M |
|
2027
CALL
Enbridge
ENB
$124B
| $1.56M | ﹤0.01% |
487
-1,101
| -69% | -$33.5K |
|
2028
PUT
Columbia Sportswear
COLM
$3.19B
| $1.55M | ﹤0.01% |
178
+146
| +456% | +$12.7K |
|
2029
CALL
Devon Energy
DVN
$51.9B
| $1.55M | ﹤0.01% |
984
-1,164
| -54% | -$14.4K |
|
2030
CALL
Baker Hughes
BKR
$56.8B
| $1.55M | ﹤0.01% |
745
-177
| -19% | -$3.11K |
|
|
2031
PUT
Baker Hughes
BKR
$56.8B
| $1.55M | ﹤0.01% |
745
-419
| -36% | -$7.36K |
|
2032
PUT
Universal Health Services
UHS
$9.43B
| $1.55M | ﹤0.01% |
113
+6
| +6% | +$747 |
|
2033
CALL
Cheesecake Factory
CAKE
$4.21B
| $1.55M | ﹤0.01% |
419
+34
| +9% | +$1.17K |
|
2034
CALL
Ametek
AME
$55.5B
| $1.55M | ﹤0.01% |
128
+75
| +142% | +$8.45K |
|
2035
CALL
AMC Entertainment Holdings
AMC
$2.03B
| $1.55M | ﹤0.01% |
729
+267
| +58% | +$8.73K |
|
2036
CALL
Insperity
NSP
$1.85B
| $1.55M | ﹤0.01% |
190
+130
| +217% | +$10.7K |
|
|
EB
2037
PUT
DELISTED
Eventbrite
EB
| $1.54M | ﹤0.01% |
854
-62
| -7% | -$868 |
|
2038
CALL
PennyMac Financial
PFSI
$4.38B
| $1.54M | ﹤0.01% |
235
-239
| -50% | -$14.2K |
|
2039
Hasbro
HAS
$12.6B
| $1.54M | ﹤0.01% |
+16,462
| New | +$1.46M |
|
2040
PUT
Precigen
PGEN
$1.93B
| $1.54M | ﹤0.01% |
1,508
-52
| -3% | -$337 |
|
2041
Invesco DB Agriculture Fund
DBA
$1.26B
| $1.54M | ﹤0.01% |
95,281
-32,110
| -25% | -$487K |
|
2042
Ralph Lauren
RL
$22.2B
| $1.54M | ﹤0.01% |
14,819
-13,617
| -48% | -$1.14M |
|
|
MPT
2043
CALL
Medical Properties Trust
MPT
$2.89B
| $1.53M | ﹤0.01% |
704
-291
| -29% | -$5.67K |
|
2044
CALL
NOV
NOV
$7.45B
| $1.53M | ﹤0.01% |
1,117
+614
| +122% | +$6.94K |
|
2045
CALL
Ubiquiti
UI
$31.8B
| $1.53M | ﹤0.01% |
55
+14
| +34% | +$3.22K |
|
2046
PUT
AMN Healthcare
AMN
$1.28B
| $1.53M | ﹤0.01% |
224
+133
| +146% | +$8.67K |
|
2047
State Street Materials Select Sector SPDR ETF
XLB
$8.51B
| $1.53M | ﹤0.01% |
42,162
+9,880
| +31% | +$338K |
|
2048
CALL
Inseego
INSG
$108M
| $1.52M | ﹤0.01% |
99
-205
| -67% | -$22.6K |
|
2049
Direxion Daily S&P Biotech Bull 3X ETF
LABU
$571M
| $1.52M | ﹤0.01% |
+759
| New | +$1.21M |
|
2050
CALL
NNN REIT
NNN
$9.39B
| $1.52M | ﹤0.01% |
372
+297
| +396% | +$11.2K |
|
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.