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 | |
|---|---|---|---|---|---|---|
|
BNY
1801
PUT
Bank of New York Mellon
BNY
$108B
| $100K | ﹤0.01% |
393
+26
| +7% | +$1.45K |
|
1802
Federal Realty Investment Trust
FRT
$10.9B
| $100K | ﹤0.01% |
864
-1,024
| -54% | -$121K |
|
1803
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $100K | ﹤0.01% |
63
-137
| -69% | -$16.4K |
|
1804
PUT
Southwest Airlines
LUV
$22.1B
| $100K | ﹤0.01% |
658
-73
| -10% | -$4.38K |
|
1805
Macerich
MAC
$7.32B
| $100K | ﹤0.01% |
+1,800
| New | +$110K |
|
|
VRS
1806
DELISTED
Verso Corporation
VRS
| $100K | ﹤0.01% |
+5,996
| New | +$100K |
|
|
JAG
1807
DELISTED
Jagged Peak Energy Inc.
JAG
| $100K | ﹤0.01% |
+7,127
| New | +$93.9K |
|
|
SCG
1808
CALL
DELISTED
Scana
SCG
| $100K | ﹤0.01% |
403
+277
| +220% | +$11.1K |
|
|
KS
1809
DELISTED
KapStone Paper and Pack Corp.
KS
| $100K | ﹤0.01% |
2,939
-13,306
| -82% | -$425K |
|
1810
CALL
Atara Biotherapeutics
ATRA
$71.2M
| $99K | ﹤0.01% |
16
+12
| +300% | +$10.9K |
|
1811
Baytex Energy
BTE
$3.08B
| $99K | ﹤0.01% |
36,301
+18,149
| +100% | +$52.8K |
|
1812
CALL
Equifax
EFX
$20.3B
| $99K | ﹤0.01% |
1,088
+745
| +217% | +$89.4K |
|
1813
CALL
Roku
ROKU
$21.1B
| $99K | ﹤0.01% |
1,074
-2,825
| -72% | -$116K |
|
1814
Vanda Pharmaceuticals
VNDA
$312M
| $99K | ﹤0.01% |
5,878
-1,220
| -17% | -$20.4K |
|
|
NVRO
1815
DELISTED
NEVRO CORP.
NVRO
| $99K | ﹤0.01% |
1,150
+1,110
| +2,775% | +$89.6K |
|
|
PEGI
1816
DELISTED
Pattern Energy Group Inc. Class A
PEGI
| $99K | ﹤0.01% |
5,783
-18,443
| -76% | -$358K |
|
|
SIVB
1817
PUT
DELISTED
SVB Financial Group
SIVB
| $99K | ﹤0.01% |
463
+150
| +48% | +$37.6K |
|
1818
Fabrinet
FN
$17.1B
| $98K | ﹤0.01% |
+3,152
| New | +$93K |
|
1819
CALL
Kraft Heinz
KHC
$30.4B
| $98K | ﹤0.01% |
2,072
+1,153
| +125% | +$82.6K |
|
1820
CALL
Kimberly-Clark
KMB
$36.4B
| $98K | ﹤0.01% |
332
+185
| +126% | +$21.1K |
|
1821
CALL
Lumentum
LITE
$59.4B
| $98K | ﹤0.01% |
808
+404
| +100% | +$23.2K |
|
1822
Oshkosh
OSK
$9.67B
| $98K | ﹤0.01% |
+1,274
| New | +$109K |
|
|
ADMS
1823
DELISTED
Adamas Pharmaceuticals
ADMS
| $98K | ﹤0.01% |
+4,134
| New | +$130K |
|
|
TFCF
1824
DELISTED
Twenty-First Century Fox, Inc. Class B
TFCF
| $98K | ﹤0.01% |
2,706
-21,243
| -89% | -$775K |
|
|
MZOR
1825
PUT
DELISTED
Mazor Robotics Ltd.
MZOR
| $98K | ﹤0.01% |
173
+73
| +73% | +$4.58K |
|
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.