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 | |
|---|---|---|---|---|---|---|
|
HOME
1826
CALL
DELISTED
At Home Group Inc.
HOME
| $967K | ﹤0.01% |
247
+230
| +1,353% | +$8.26K |
|
1827
CALL
Fair Isaac
FICO
$28.7B
| $966K | ﹤0.01% |
+50
| New | +$9.05K |
|
1828
Aptiv
APTV
$12B
| $964K | ﹤0.01% |
+10,529
| New | +$982K |
|
|
ARCH
1829
PUT
DELISTED
Arch Resources, Inc.
ARCH
| $964K | ﹤0.01% |
123
+95
| +339% | +$8.09K |
|
|
WEB
1830
CALL
DELISTED
Web.com Group, Inc.
WEB
| $964K | ﹤0.01% |
+373
| New | +$7.5K |
|
1831
Truist Financial
TFC
$63.2B
| $963K | ﹤0.01% |
+19,099
| New | +$1.01M |
|
1832
PUT
Autohome
ATHM
$2.43B
| $959K | ﹤0.01% |
95
+27
| +40% | +$2.77K |
|
1833
PepsiCo
PEP
$186B
| $959K | ﹤0.01% |
8,815
+4,155
| +89% | +$429K |
|
1834
Xerox
XRX
$337M
| $959K | ﹤0.01% |
39,994
+9,791
| +32% | +$277K |
|
|
NVRO
1835
CALL
DELISTED
NEVRO CORP.
NVRO
| $958K | ﹤0.01% |
120
+73
| +155% | +$6.05K |
|
|
TSG
1836
PUT
DELISTED
The Stars Group Inc.
TSG
| $958K | ﹤0.01% |
264
-68
| -20% | -$2.27K |
|
1837
CALL
Yum China
YUMC
$14.9B
| $957K | ﹤0.01% |
249
+100
| +67% | +$3.96K |
|
1838
PUT
Gartner
IT
$9.41B
| $956K | ﹤0.01% |
72
-68
| -49% | -$8.71K |
|
1839
CALL
Wolfspeed
WOLF
$1.2B
| $956K | ﹤0.01% |
230
-54
| -19% | -$2.36K |
|
1840
Equifax
EFX
$20.3B
| $953K | ﹤0.01% |
+7,623
| New | +$903K |
|
|
CBPO
1841
PUT
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $953K | ﹤0.01% |
+96
| New | +$8.29K |
|
|
EVA
1842
CALL
DELISTED
Enviva Inc.
EVA
| $951K | ﹤0.01% |
327
+7
| +2% | +$202 |
|
|
GSKY
1843
PUT
DELISTED
GreenSky, Inc. Class A Common Stock
GSKY
| $951K | ﹤0.01% |
+450
| New | +$10.8K |
|
1844
CALL
Avery Dennison
AVY
$12.3B
| $949K | ﹤0.01% |
93
+60
| +182% | +$6.35K |
|
1845
CALL
Ross Stores
ROST
$76.6B
| $949K | ﹤0.01% |
112
+9
| +9% | +$732 |
|
1846
PUT
Valvoline
VVV
$4.97B
| $949K | ﹤0.01% |
440
-88
| -17% | -$1.86K |
|
1847
PUT
Vipshop
VIPS
$6.84B
| $948K | ﹤0.01% |
874
-480
| -35% | -$6.57K |
|
1848
PUT
Annaly Capital Management
NLY
$16.9B
| $946K | ﹤0.01% |
230
+172
| +297% | +$7.17K |
|
1849
CALL
Steel Dynamics
STLD
$35.6B
| $946K | ﹤0.01% |
206
-262
| -56% | -$12.4K |
|
|
COUP
1850
CALL
DELISTED
Coupa Software Incorporated
COUP
| $946K | ﹤0.01% |
152
+70
| +85% | +$3.72K |
|
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.