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 |
Tesla
TSLA
|
+$33.5M |
| 2 |
Netflix
NFLX
|
+$22.8M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.9M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$15.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$71.1M |
| 2 |
Micron Technology
MU
|
+$43.8M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Booking.com
BKNG
|
+$22.2M |
| 5 |
Boeing
BA
|
+$21.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 7.87% |
| 2 | Communication Services | 7.14% |
| 3 | Technology | 6.23% |
| 4 | Financials | 5.5% |
| 5 | Healthcare | 5.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
VXX
126
PUT
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $3.11M | 0.14% |
13,028
+3,558
| +38% | +$135K |
|
127
Bunge Global
BG
$23.4B
| $3.11M | 0.14% |
42,079
+28,118
| +201% | +$2.12M |
|
128
Honeywell
HON
$72.8B
| $3.09M | 0.14% |
+23,665
| New | +$3.27M |
|
129
CALL
Regeneron Pharmaceuticals
REGN
$70.5B
| $3.08M | 0.14% |
8,138
+7,011
| +622% | +$2.44M |
|
130
PUT
Microsoft
MSFT
$2.95T
| $3.06M | 0.13% |
7,762
-1,842
| -19% | -$168K |
|
131
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $3.04M | 0.13% |
19,076
+1,723
| +10% | +$39.7K |
|
132
Deere & Co
DE
$158B
| $3.01M | 0.13% |
19,387
-80,544
| -81% | -$13.1M |
|
133
Palo Alto Networks
PANW
$279B
| $2.97M | 0.13% |
+98,316
| New | +$2.73M |
|
134
Newmont
NEM
$98.7B
| $2.94M | 0.13% |
75,269
+63,150
| +521% | +$2.44M |
|
|
MSCC
135
CALL
DELISTED
Microsemi Corp
MSCC
| $2.93M | 0.13% |
+45,571
| New | +$2.81M |
|
136
Devon Energy
DVN
$50.9B
| $2.91M | 0.13% |
+91,621
| New | +$3.36M |
|
137
AstraZeneca
AZN
$263B
| $2.88M | 0.13% |
+41,132
| New | +$2.85M |
|
138
Trip.com Group
TCOM
$27.5B
| $2.87M | 0.13% |
61,542
-97,667
| -61% | -$4.58M |
|
|
X
139
DELISTED
US Steel
X
| $2.84M | 0.13% |
80,785
-16,575
| -17% | -$653K |
|
|
140
PUT
Booking.com
BKNG
$139B
| $2.81M | 0.12% |
28,200
-27,750
| -50% | -$2.18M |
|
141
PUT
IBM
IBM
$198B
| $2.78M | 0.12% |
4,578
-2,115
| -32% | -$320K |
|
|
UCD
142
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $2.75M | 0.12% |
8,727
-12,858
| -60% | -$4.06M |
|
143
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.2B
| $2.75M | 0.12% |
+52,252
| New | +$2.88M |
|
144
PUT
Goldman Sachs
GS
$320B
| $2.7M | 0.12% |
2,903
-359
| -11% | -$93.5K |
|
145
Franklin Covey
FC
$238M
| $2.69M | 0.12% |
99,916
+84,766
| +560% | +$2.31M |
|
146
CALL
Wynn Resorts
WYNN
$9.82B
| $2.68M | 0.12% |
2,389
+1,087
| +83% | +$188K |
|
147
Universal Display
OLED
$3.81B
| $2.68M | 0.12% |
26,539
+22,690
| +590% | +$3.41M |
|
148
Morgan Stanley
MS
$340B
| $2.66M | 0.12% |
49,336
-26,366
| -35% | -$1.46M |
|
|
PPLI
149
CALL
People Inc
PPLI
$3.28B
| $2.62M | 0.12% |
86,315
+85,907
| +21,056% | +$2.26M |
|
150
CALL
Caterpillar
CAT
$410B
| $2.61M | 0.11% |
4,277
+1,875
| +78% | +$296K |
|
Similar funds
Simplex Trading's Q1 2018 Portfolio in Review
As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.
Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.
- Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
- Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
- Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
- Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
- Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
- Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.
Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.