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 | |
|---|---|---|---|---|---|---|
1676
Monster Beverage
MNST
$91.4B
| $1.24M | ﹤0.01% |
42,492
+16,718
| +65% | +$503K |
|
|
RESI
1677
DELISTED
Front Yard Residential Corporation Common Stock
RESI
| $1.24M | ﹤0.01% |
114,078
+101,918
| +838% | +$1.14M |
|
|
LOGM
1678
DELISTED
LogMein, Inc.
LOGM
| $1.24M | ﹤0.01% |
13,877
+6,546
| +89% | +$592K |
|
1679
CALL
British American Tobacco
BTI
$132B
| $1.24M | ﹤0.01% |
265
+43
| +19% | +$2.18K |
|
|
DVAX
1680
DELISTED
Dynavax Technologies
DVAX
| $1.24M | ﹤0.01% |
99,640
+91,992
| +1,203% | +$1.24M |
|
1681
CALL
Flex
FLEX
$43.4B
| $1.24M | ﹤0.01% |
1,250
+1,137
| +1,006% | +$11.9K |
|
1682
CALL
Delek US
DK
$3.87B
| $1.23M | ﹤0.01% |
291
-3
| -1% | -$148 |
|
|
SODA
1683
DELISTED
SodaStream International Ltd
SODA
| $1.23M | ﹤0.01% |
8,608
+5,476
| +175% | +$659K |
|
|
OSG
1684
Octave Specialty Group
OSG
$252M
| $1.23M | ﹤0.01% |
60,198
+57,146
| +1,872% | +$1.19M |
|
1685
PUT
Omega Healthcare
OHI
$15.4B
| $1.23M | ﹤0.01% |
375
-243
| -39% | -$7.74K |
|
1686
CALL
Targa Resources
TRGP
$60.4B
| $1.23M | ﹤0.01% |
218
-160
| -42% | -$8.54K |
|
|
NVO
1687
PUT
Novo Nordisk
NVO
$216B
| $1.23M | ﹤0.01% |
520
+62
| +14% | +$1.51K |
|
|
MRO
1688
DELISTED
Marathon Oil Corporation
MRO
| $1.23M | ﹤0.01% |
+52,621
| New | +$1.1M |
|
1689
PUT
Box
BOX
$4.02B
| $1.22M | ﹤0.01% |
512
-300
| -37% | -$7.55K |
|
1690
PUT
Ford
F
$57.3B
| $1.22M | ﹤0.01% |
1,323
+1,114
| +533% | +$11.1K |
|
1691
CALL
Walker & Dunlop
WD
$1.65B
| $1.22M | ﹤0.01% |
231
+230
| +23,000% | +$12.8K |
|
1692
CALL
ING
ING
$93.8B
| $1.22M | ﹤0.01% |
941
+586
| +165% | +$8.22K |
|
1693
CALL
Madrigal Pharmaceuticals
MDGL
$12.6B
| $1.22M | ﹤0.01% |
+57
| New | +$14.3K |
|
1694
PUT
Assurant
AIZ
$13.7B
| $1.22M | ﹤0.01% |
113
-85
| -43% | -$9K |
|
|
PXD
1695
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.22M | ﹤0.01% |
+7,000
| New | +$1.25M |
|
1696
CALL
AMC Entertainment Holdings
AMC
$2.03B
| $1.22M | ﹤0.01% |
59
+2
| +4% | +$362 |
|
|
CS
1697
DELISTED
Credit Suisse Group
CS
| $1.22M | ﹤0.01% |
81,397
+3,202
| +4% | +$48.8K |
|
|
HA
1698
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $1.22M | ﹤0.01% |
303
-205
| -40% | -$8.14K |
|
|
WLL
1699
PUT
DELISTED
Whiting Petroleum Corporation
WLL
| $1.21M | ﹤0.01% |
3
-19
| -86% | -$70K |
|
|
FRC
1700
PUT
DELISTED
First Republic Bank
FRC
| $1.21M | ﹤0.01% |
126
+120
| +2,000% | +$12.1K |
|
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.