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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2026
PUT
Yum! Brands
YUM
$41B
| $766K | ﹤0.01% |
98
-29
| -23% | -$2.42K |
|
|
UFS
2027
DELISTED
DOMTAR CORPORATION (New)
UFS
| $766K | ﹤0.01% |
+16,049
| New | +$744K |
|
2028
PUT
Post Holdings
POST
$4.12B
| $765K | ﹤0.01% |
136
-3
| -2% | -$157 |
|
|
SGMO
2029
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $765K | ﹤0.01% |
539
+51
| +10% | +$847 |
|
2030
Hyatt Hotels
H
$17.6B
| $762K | ﹤0.01% |
9,887
+8,445
| +586% | +$672K |
|
2031
PUT
Howmet Aerospace
HWM
$116B
| $762K | ﹤0.01% |
597
-552
| -48% | -$8.19K |
|
|
THS
2032
CALL
DELISTED
Treehouse Foods
THS
| $761K | ﹤0.01% |
145
+108
| +292% | +$4.89K |
|
2033
CALL
Integra LifeSciences
IART
$1.54B
| $760K | ﹤0.01% |
+118
| New | +$7.31K |
|
2034
MPLX
MPLX
$59.5B
| $760K | ﹤0.01% |
22,264
+12,483
| +128% | +$434K |
|
2035
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$746M
| $760K | ﹤0.01% |
152
-1,154
| -88% | -$26.5K |
|
|
CRZO
2036
PUT
DELISTED
Carrizo Oil & Gas Inc
CRZO
| $760K | ﹤0.01% |
273
-63
| -19% | -$1.45K |
|
2037
CALL
RingCentral
RNG
$4.05B
| $759K | ﹤0.01% |
108
-75
| -41% | -$5.37K |
|
2038
CALL
Alkermes
ALKS
$8.82B
| $757K | ﹤0.01% |
184
-32,574
| -99% | -$1.48M |
|
2039
PUT
Norwegian Cruise Line
NCLH
$8.89B
| $756K | ﹤0.01% |
160
-15
| -9% | -$790 |
|
|
ADMS
2040
CALL
DELISTED
Adamas Pharmaceuticals
ADMS
| $756K | ﹤0.01% |
293
-20
| -6% | -$554 |
|
|
LOGM
2041
DELISTED
LogMein, Inc.
LOGM
| $756K | ﹤0.01% |
7,331
+7,226
| +6,882% | +$808K |
|
2042
Atlassian
TEAM
$22B
| $753K | ﹤0.01% |
12,057
-2,928
| -20% | -$180K |
|
2043
Tapestry
TPR
$28.8B
| $752K | ﹤0.01% |
+16,114
| New | +$775K |
|
|
ZEN
2044
PUT
DELISTED
ZENDESK INC
ZEN
| $751K | ﹤0.01% |
+138
| New | +$7.33K |
|
|
BITA
2045
PUT
DELISTED
Bitauto Holdings Limited
BITA
| $751K | ﹤0.01% |
316
+292
| +1,217% | +$6.63K |
|
2046
CALL
Columbia Sportswear
COLM
$3.19B
| $750K | ﹤0.01% |
+82
| New | +$7K |
|
2047
CALL
Huntsman Corp
HUN
$2.24B
| $750K | ﹤0.01% |
257
-179
| -41% | -$5.54K |
|
2048
PUT
Amphenol
APH
$188B
| $749K | ﹤0.01% |
344
-24
| -7% | -$522 |
|
2049
CALL
Floor & Decor
FND
$5.81B
| $749K | ﹤0.01% |
152
-9
| -6% | -$462 |
|
2050
TG Therapeutics
TGTX
$8.58B
| $749K | ﹤0.01% |
+57,018
| New | +$784K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.