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 | |
|---|---|---|---|---|---|---|
2176
PUT
Extreme Networks
EXTR
$3.86B
| $666K | ﹤0.01% |
837
+783
| +1,450% | +$7.51K |
|
2177
Huntington Ingalls Industries
HII
$11.3B
| $666K | ﹤0.01% |
+3,074
| New | +$714K |
|
2178
Verastem
VSTM
$532M
| $666K | ﹤0.01% |
+8,075
| New | +$494K |
|
2179
Bunge Global
BG
$23.6B
| $665K | ﹤0.01% |
9,548
-32,531
| -77% | -$2.33M |
|
2180
CALL
Textron
TXT
$16.6B
| $665K | ﹤0.01% |
101
+37
| +58% | +$2.39K |
|
2181
BioMarin Pharmaceuticals
BMRN
$11.5B
| $663K | ﹤0.01% |
7,048
+883
| +14% | +$77.3K |
|
2182
CALL
Howard Hughes
HHH
$3.93B
| $662K | ﹤0.01% |
52
+9
| +21% | +$1.15K |
|
2183
CALL
Pinnacle Financial Partners Inc
PNFP
$15.5B
| $662K | ﹤0.01% |
108
-33
| -23% | -$2.14K |
|
2184
Hain Celestial
HAIN
$47.8M
| $660K | ﹤0.01% |
+22,163
| New | +$636K |
|
2185
CALL
Ventas
VTR
$48.9B
| $660K | ﹤0.01% |
116
+64
| +123% | +$3.35K |
|
2186
CALL
WPP
WPP
$4.04B
| $660K | ﹤0.01% |
84
+39
| +87% | +$3.23K |
|
|
TIVO
2187
DELISTED
Tivo Inc
TIVO
| $660K | ﹤0.01% |
49,095
+41,902
| +583% | +$594K |
|
2188
CALL
Service Corp International
SCI
$11.4B
| $658K | ﹤0.01% |
184
-11,071
| -98% | -$410K |
|
2189
CALL
Stryker
SYK
$127B
| $658K | ﹤0.01% |
39
-21
| -35% | -$3.53K |
|
2190
Intellia Therapeutics
NTLA
$1.5B
| $657K | ﹤0.01% |
24,039
+3,162
| +15% | +$76.6K |
|
|
AMAG
2191
CALL
DELISTED
AMAG Pharmaceuticals
AMAG
| $657K | ﹤0.01% |
+337
| New | +$7.46K |
|
2192
CALL
Sensata Technologies
ST
$6.65B
| $656K | ﹤0.01% |
+138
| New | +$7.19K |
|
2193
PUT
Royal Bank of Canada
RY
$291B
| $655K | ﹤0.01% |
87
+51
| +142% | +$3.9K |
|
|
AL
2194
CALL
DELISTED
Air Lease Corp
AL
| $654K | ﹤0.01% |
156
+141
| +940% | +$6.11K |
|
2195
CALL
Unum
UNM
$13.8B
| $654K | ﹤0.01% |
177
+171
| +2,850% | +$7.13K |
|
|
WCN
2196
PUT
Waste Connections
WCN
$42.8B
| $654K | ﹤0.01% |
87
+28
| +47% | +$2.09K |
|
2197
Upland Software
UPLD
$12M
| $653K | ﹤0.01% |
1,901
+1,891
| +18,910% | +$593K |
|
2198
CALL
Churchill Downs
CHDN
$6.03B
| $652K | ﹤0.01% |
132
+66
| +100% | +$3.09K |
|
2199
Cars.com
CARS
$641M
| $650K | ﹤0.01% |
+22,897
| New | +$630K |
|
2200
Jack in the Box
JACK
$278M
| $650K | ﹤0.01% |
7,638
+1,620
| +27% | +$140K |
|
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.