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 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1851
CALL
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $1.03M | ﹤0.01% |
135
+21
| +18% | +$1.58K |
|
|
GAP
1852
The Gap Inc
GAP
$6.84B
| $1.03M | ﹤0.01% |
35,725
-9,589
| -21% | -$287K |
|
1853
CALL
Nasdaq
NDAQ
$51.5B
| $1.03M | ﹤0.01% |
360
+261
| +264% | +$8.04K |
|
1854
PUT
Ares Capital
ARCC
$13.5B
| $1.03M | ﹤0.01% |
598
+554
| +1,259% | +$9.5K |
|
1855
CALL
Unum
UNM
$13.8B
| $1.03M | ﹤0.01% |
263
+86
| +49% | +$3.21K |
|
1856
ProShares Ultra Bloomberg Crude Oil
UCO
$443M
| $1.03M | ﹤0.01% |
4,566
-1,406
| -24% | -$275K |
|
|
SF
1857
CALL
Stifel
SF
$12.3B
| $1.02M | ﹤0.01% |
450
-434
| -49% | -$10.4K |
|
|
CLDR
1858
PUT
DELISTED
Cloudera, Inc.
CLDR
| $1.02M | ﹤0.01% |
581
+109
| +23% | +$1.66K |
|
|
CHL
1859
DELISTED
China Mobile Limited
CHL
| $1.02M | ﹤0.01% |
20,955
+12,136
| +138% | +$561K |
|
1860
CALL
iShares Silver Trust
SLV
$28.1B
| $1.02M | ﹤0.01% |
746
-1,026
| -58% | -$14.5K |
|
1861
PUT
Western Alliance Bancorporation
WAL
$9.07B
| $1.02M | ﹤0.01% |
180
+79
| +78% | +$4.55K |
|
1862
CALL
Omega Healthcare
OHI
$15.4B
| $1.02M | ﹤0.01% |
312
-253
| -45% | -$8.05K |
|
|
CY
1863
CALL
DELISTED
Cypress Semiconductor
CY
| $1.02M | ﹤0.01% |
706
+406
| +135% | +$6.68K |
|
1864
PUT
Service Corp International
SCI
$11.4B
| $1.02M | ﹤0.01% |
231
-5
| -2% | -$202 |
|
1865
PUT
Appian
APPN
$1.74B
| $1.02M | ﹤0.01% |
+308
| New | +$10.5K |
|
1866
CALL
Vodafone
VOD
$34.9B
| $1.02M | ﹤0.01% |
470
-777
| -62% | -$18.1K |
|
|
INFO
1867
CALL
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $1.02M | ﹤0.01% |
189
+48
| +34% | +$2.58K |
|
|
BFYT
1868
CALL
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $1.02M | ﹤0.01% |
165
+69
| +72% | +$3.15K |
|
1869
PUT
The Mosaic Company
MOS
$7.09B
| $1.02M | ﹤0.01% |
313
+64
| +26% | +$1.93K |
|
1870
CALL
Boise Cascade
BCC
$2.74B
| $1.01M | ﹤0.01% |
276
-34
| -11% | -$1.48K |
|
1871
CALL
FirstEnergy
FE
$28.9B
| $1.01M | ﹤0.01% |
273
-44
| -14% | -$1.61K |
|
1872
PUT
Willis Towers Watson
WTW
$27.9B
| $1.01M | ﹤0.01% |
72
-297
| -80% | -$44.9K |
|
|
SKX
1873
DELISTED
Skechers
SKX
| $1.01M | ﹤0.01% |
36,293
-13,999
| -28% | -$405K |
|
1874
PUT
British American Tobacco
BTI
$132B
| $1.01M | ﹤0.01% |
217
+11
| +5% | +$559 |
|
1875
Edison International
EIX
$30.7B
| $1.01M | ﹤0.01% |
14,942
+11,499
| +334% | +$769K |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.