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 | |
|---|---|---|---|---|---|---|
151
CALL
Chevron
CVX
$381B
| $23.2M | 0.09% |
1,838
-872
| -32% | -$108K |
|
152
CALL
Amgen
AMGN
$198B
| $23M | 0.09% |
1,247
-545
| -30% | -$96.4K |
|
153
PUT
Western Digital
WDC
$189B
| $22.9M | 0.09% |
3,909
+353
| +10% | +$22.5K |
|
154
PUT
iQIYI
IQ
$1.21B
| $22.8M | 0.09% |
+7,058
| New | +$172K |
|
|
RTN
155
CALL
DELISTED
Raytheon Company
RTN
| $22.7M | 0.09% |
1,175
+515
| +78% | +$108K |
|
156
PUT
NetEase
NTES
$82.9B
| $22.6M | 0.09% |
4,470
-995
| -18% | -$50.8K |
|
|
X
157
PUT
DELISTED
US Steel
X
| $22.5M | 0.09% |
6,482
+1,417
| +28% | +$50.7K |
|
158
PUT
PayPal
PYPL
$49.3B
| $22.4M | 0.09% |
2,690
-1,029
| -28% | -$82K |
|
159
CALL
Bristol-Myers Squibb
BMY
$124B
| $22.3M | 0.09% |
4,022
-220
| -5% | -$11.9K |
|
160
PUT
Oracle
ORCL
$366B
| $22M | 0.09% |
4,987
-1,698
| -25% | -$78.2K |
|
161
CALL
BP
BP
$110B
| $21.9M | 0.09% |
5,096
+3,061
| +150% | +$129K |
|
162
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $21.7M | 0.09% |
630
-224
| -26% | -$70.1K |
|
|
STZ.B
163
PUT
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $21.7M | 0.09% |
991
+525
| +113% | +$119K |
|
164
PUT
Gilead Sciences
GILD
$165B
| $21.6M | 0.08% |
3,053
+788
| +35% | +$55.6K |
|
165
CALL
CVS Health
CVS
$141B
| $21.6M | 0.08% |
3,355
+1,716
| +105% | +$113K |
|
166
CALL
Lam Research
LRCX
$403B
| $21.6M | 0.08% |
12,480
+1,140
| +10% | +$22K |
|
167
CALL
Texas Instruments
TXN
$265B
| $21.4M | 0.08% |
1,942
-183
| -9% | -$19.8K |
|
168
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$749M
| $21.4M | 0.08% |
4,275
+1,678
| +65% | +$38.6K |
|
169
CALL
Johnson & Johnson
JNJ
$603B
| $21.2M | 0.08% |
1,750
-32
| -2% | -$3.99K |
|
|
VMW
170
CALL
DELISTED
VMware, Inc
VMW
| $21.2M | 0.08% |
1,442
-33,221
| -96% | -$4.58M |
|
|
171
PUT
Amgen
AMGN
$198B
| $21.2M | 0.08% |
1,146
-168
| -13% | -$29.7K |
|
172
CALL
Lockheed Martin
LMT
$117B
| $21M | 0.08% |
712
-30,871
| -98% | -$9.96M |
|
173
Adobe
ADBE
$90.3B
| $21M | 0.08% |
86,165
+41,406
| +93% | +$9.79M |
|
174
CALL
JD.com
JD
$41.1B
| $21M | 0.08% |
5,391
-435
| -7% | -$16.8K |
|
|
TFCFA
175
DELISTED
Twenty-First Century Fox, Inc. Class A
TFCFA
| $21M | 0.08% |
421,923
+415,218
| +6,193% | +$16.4M |
|
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.