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 | |
|---|---|---|---|---|---|---|
3601
PUT
Edgewell Personal Care
EPC
$1.28B
| $208K | ﹤0.01% |
45
-55
| -55% | -$2.91K |
|
3602
Knight Transportation
KNX
$11.5B
| $208K | ﹤0.01% |
6,046
-8,095
| -57% | -$283K |
|
3603
Energous
WATT
$78.7M
| $208K | ﹤0.01% |
34
+30
| +750% | +$233K |
|
|
CNR
3604
Core Natural Resources Inc
CNR
$4.16B
| $208K | ﹤0.01% |
5,117
+1,120
| +28% | +$47.1K |
|
|
INFN
3605
CALL
DELISTED
Infinera Corporation Common Stock
INFN
| $208K | ﹤0.01% |
285
-2
| -0.7% | -$17 |
|
3606
PUT
Hexcel
HXL
$8.28B
| $207K | ﹤0.01% |
31
-51
| -62% | -$3.46K |
|
|
LMNX
3607
DELISTED
Luminex Corp
LMNX
| $207K | ﹤0.01% |
6,846
+6,721
| +5,377% | +$202K |
|
|
DERM
3608
CALL
DELISTED
Dermira, Inc.
DERM
| $207K | ﹤0.01% |
190
+89
| +88% | +$898 |
|
3609
CALL
Amphenol
APH
$184B
| $206K | ﹤0.01% |
88
-388
| -82% | -$9.02K |
|
|
VISN
3610
PUT
Vistance Networks Inc
VISN
$2.67B
| $206K | ﹤0.01% |
67
+20
| +43% | +$613 |
|
3611
PUT
Enphase Energy
ENPH
$5.01B
| $206K | ﹤0.01% |
425
+361
| +564% | +$1.98K |
|
3612
CALL
Genworth Financial
GNW
$3.79B
| $206K | ﹤0.01% |
496
-66
| -12% | -$298 |
|
3613
JPMorgan Chase
JPM
$947B
| $206K | ﹤0.01% |
1,828
-99,965
| -98% | -$11.3M |
|
3614
PUT
Texas Capital Bancshares
TCBI
$4.28B
| $206K | ﹤0.01% |
25
+7
| +39% | +$635 |
|
|
LFC
3615
DELISTED
China Life Insurance Company Ltd.
LFC
| $206K | ﹤0.01% |
18,110
+4,468
| +33% | +$53.1K |
|
3616
Credit Acceptance
CACC
$5.78B
| $205K | ﹤0.01% |
469
-210
| -31% | -$88.1K |
|
3617
CALL
Canadian Natural Resources
CNQ
$93.4B
| $205K | ﹤0.01% |
129
-535
| -81% | -$9.06K |
|
3618
PUT
EPR Properties
EPR
$4.85B
| $205K | ﹤0.01% |
30
-94
| -76% | -$6.39K |
|
3619
PUT
Huntington Bancshares
HBAN
$34.7B
| $205K | ﹤0.01% |
138
+101
| +273% | +$1.58K |
|
3620
PetMed Express
PETS
$42.1M
| $205K | ﹤0.01% |
6,237
+5,019
| +412% | +$188K |
|
|
EMWP
3621
DELISTED
Eros Media World PLC
EMWP
| $205K | ﹤0.01% |
853
+295
| +53% | +$75.9K |
|
|
ATRS
3622
DELISTED
Antares Pharma, Inc.
ATRS
| $205K | ﹤0.01% |
+61,122
| New | +$189K |
|
3623
CALL
Casella Waste Systems
CWST
$5.68B
| $204K | ﹤0.01% |
66
-109
| -62% | -$3.1K |
|
3624
MakeMyTrip
MMYT
$4.97B
| $204K | ﹤0.01% |
7,455
-5,814
| -44% | -$186K |
|
3625
CALL
Red Robin
RRGB
$136M
| $204K | ﹤0.01% |
51
-197
| -79% | -$8.38K |
|
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.