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 | |
|---|---|---|---|---|---|---|
1751
CALL
Amphenol
APH
$188B
| $1.04M | ﹤0.01% |
476
+248
| +109% | +$5.4K |
|
1752
CALL
Cameco
CCJ
$38.3B
| $1.04M | ﹤0.01% |
922
-14
| -1% | -$153 |
|
1753
PUT
SS&C Technologies
SSNC
$17.8B
| $1.04M | ﹤0.01% |
+200
| New | +$10.1K |
|
1754
PUT
Fortinet
FTNT
$112B
| $1.04M | ﹤0.01% |
830
-145
| -15% | -$1.72K |
|
|
SAFM
1755
DELISTED
Sanderson Farms Inc
SAFM
| $1.04M | ﹤0.01% |
+9,857
| New | +$1.07M |
|
1756
PUT
Duke Energy
DUK
$102B
| $1.03M | ﹤0.01% |
131
+76
| +138% | +$5.84K |
|
|
QVCGA
1757
CALL
DELISTED
QVC Group Inc Series A
QVCGA
| $1.03M | ﹤0.01% |
+10
| New | +$11.1K |
|
|
KLXI
1758
CALL
DELISTED
KLX Inc.
KLXI
| $1.03M | ﹤0.01% |
171
+148
| +643% | +$9.07K |
|
1759
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $1.03M | ﹤0.01% |
176
-258
| -59% | -$14.7K |
|
|
QIWI
1760
PUT
DELISTED
QIWI PLC
QIWI
| $1.03M | ﹤0.01% |
656
-71
| -10% | -$1.22K |
|
1761
Essex Property Trust
ESS
$18.9B
| $1.03M | ﹤0.01% |
4,320
-2,116
| -33% | -$504K |
|
1762
CALL
Mattel
MAT
$4.17B
| $1.03M | ﹤0.01% |
629
-823
| -57% | -$12.5K |
|
1763
CALL
Church & Dwight Co
CHD
$23.1B
| $1.03M | ﹤0.01% |
194
+142
| +273% | +$6.87K |
|
|
AKRX
1764
PUT
DELISTED
Akorn Inc
AKRX
| $1.03M | ﹤0.01% |
622
+172
| +38% | +$2.64K |
|
1765
CALL
AeroVironment
AVAV
$7.57B
| $1.03M | ﹤0.01% |
144
+104
| +260% | +$5.92K |
|
1766
CALL
Eagle Materials
EXP
$6.6B
| $1.03M | ﹤0.01% |
98
+11
| +13% | +$1.16K |
|
|
K
1767
DELISTED
Kellanova
K
| $1.03M | ﹤0.01% |
+15,644
| New | +$931K |
|
1768
Direxion Daily S&P 500 Bull 3x ETF
SPXL
$6.58B
| $1.03M | ﹤0.01% |
23,036
+12,540
| +119% | +$550K |
|
|
CMA
1769
DELISTED
Comerica
CMA
| $1.02M | ﹤0.01% |
+11,277
| New | +$1.08M |
|
1770
Ralph Lauren
RL
$22.2B
| $1.02M | ﹤0.01% |
8,143
+4,764
| +141% | +$578K |
|
|
ICPT
1771
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $1.02M | ﹤0.01% |
122
+58
| +91% | +$4.25K |
|
1772
Yum! Brands
YUM
$41B
| $1.02M | ﹤0.01% |
13,067
+8,572
| +191% | +$715K |
|
|
SVU
1773
DELISTED
SUPERVALU Inc.
SVU
| $1.02M | ﹤0.01% |
49,851
-511
| -1% | -$8.99K |
|
1774
PUT
Q2 Holdings
QTWO
$3.42B
| $1.02M | ﹤0.01% |
179
-326
| -65% | -$17.8K |
|
1775
PUT
LivaNova
LIVN
$4.3B
| $1.02M | ﹤0.01% |
102
+65
| +176% | +$5.9K |
|
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.