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 | |
|---|---|---|---|---|---|---|
1101
TechnipFMC
FTI
$30.3B
| $2.07M | 0.01% |
87,826
+27,093
| +45% | +$646K |
|
1102
CALL
Sun Life Financial
SLF
$45.1B
| $2.07M | 0.01% |
+516
| New | +$21.4K |
|
1103
KKR & Co
KKR
$86.2B
| $2.07M | 0.01% |
83,234
+37,690
| +83% | +$837K |
|
|
WCG
1104
PUT
DELISTED
Wellcare Health Plans, Inc.
WCG
| $2.07M | 0.01% |
84
+59
| +236% | +$12.8K |
|
1105
CALL
W.W. Grainger
GWW
$64.6B
| $2.07M | 0.01% |
67
-194
| -74% | -$58K |
|
1106
Assurant
AIZ
$13.6B
| $2.06M | 0.01% |
19,890
+11,546
| +138% | +$1.09M |
|
1107
PUT
Pultegroup
PHM
$23.7B
| $2.06M | 0.01% |
715
+55
| +8% | +$1.66K |
|
1108
PUT
Regions Financial
RF
$26.2B
| $2.06M | 0.01% |
1,156
+1,046
| +951% | +$19.6K |
|
1109
iShares Silver Trust
SLV
$27.8B
| $2.05M | 0.01% |
135,595
+100,235
| +283% | +$1.56M |
|
|
SF
1110
CALL
Stifel
SF
$12.1B
| $2.05M | 0.01% |
884
-70
| -7% | -$1.82K |
|
1111
CALL
National Beverage
FIZZ
$2.86B
| $2.05M | 0.01% |
384
| – | – |
|
|
1112
PUT
Assurant
AIZ
$13.6B
| $2.05M | 0.01% |
+198
| New | +$18.6K |
|
1113
PUT
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $2.05M | 0.01% |
160
+10
| +7% | +$1.32K |
|
1114
PUT
Inogen
INGN
$171M
| $2.05M | 0.01% |
110
+100
| +1,000% | +$16.6K |
|
|
CRC
1115
CALL
DELISTED
California Resources Corporation
CRC
| $2.05M | 0.01% |
451
+265
| +142% | +$8.38K |
|
1116
CALL
CarMax
KMX
$8.29B
| $2.05M | 0.01% |
281
-1
| -0.4% | -$67 |
|
|
EVHC
1117
CALL
DELISTED
Envision Healthcare Holdings Inc
EVHC
| $2.04M | 0.01% |
464
+273
| +143% | +$11.2K |
|
1118
CALL
Air Products & Chemicals
APD
$65.5B
| $2.04M | 0.01% |
131
-47
| -26% | -$7.69K |
|
1119
PUT
National Health Investors
NHI
$3.88B
| $2.04M | 0.01% |
277
+56
| +25% | +$3.96K |
|
|
SLCA
1120
PUT
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $2.04M | 0.01% |
794
+190
| +31% | +$5.57K |
|
|
1121
CALL
Pultegroup
PHM
$23.7B
| $2.04M | 0.01% |
709
-160
| -18% | -$4.81K |
|
|
ANSS
1122
CALL
DELISTED
Ansys
ANSS
| $2.04M | 0.01% |
117
+113
| +2,825% | +$18.8K |
|
1123
CALL
HDFC Bank
HDB
$119B
| $2.04M | 0.01% |
776
-55,196
| -99% | -$1.38M |
|
1124
PUT
NextEra Energy
NEE
$187B
| $2.04M | 0.01% |
488
-148
| -23% | -$5.98K |
|
1125
CALL
Ralph Lauren
RL
$22.1B
| $2.04M | 0.01% |
162
+128
| +376% | +$15.5K |
|
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.