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 | |
|---|---|---|---|---|---|---|
976
PUT
Omnicom Group
OMC
$22.3B
| $2.84M | 0.01% |
417
+125
| +43% | +$8.77K |
|
977
CALL
Ferrari
RACE
$63.3B
| $2.83M | 0.01% |
207
+124
| +149% | +$16.3K |
|
978
CALL
Lennar Class B
LEN.B
$19.3B
| $2.83M | 0.01% |
638
+344
| +117% | +$13.9K |
|
979
PUT
Ubiquiti
UI
$32B
| $2.83M | 0.01% |
286
+127
| +80% | +$11.2K |
|
980
PUT
STMicroelectronics
STM
$47.7B
| $2.83M | 0.01% |
1,541
+1,460
| +1,802% | +$30.3K |
|
|
MDCO
981
PUT
DELISTED
Medicines Co
MDCO
| $2.83M | 0.01% |
945
+875
| +1,250% | +$33K |
|
982
PUT
MBIA
MBI
$298M
| $2.82M | 0.01% |
2,638
+770
| +41% | +$7.88K |
|
|
LPNT
983
CALL
DELISTED
LifePoint Health, Inc.
LPNT
| $2.82M | 0.01% |
+438
| New | +$26.7K |
|
|
MIC
984
CALL
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $2.81M | 0.01% |
609
+254
| +72% | +$11.6K |
|
985
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $2.8M | 0.01% |
289
| – | – |
|
986
PUT
Molson Coors Class B
TAP
$7.48B
| $2.79M | 0.01% |
454
+238
| +110% | +$15.7K |
|
987
CALL
Stryker
SYK
$122B
| $2.79M | 0.01% |
157
+118
| +303% | +$20.1K |
|
988
Toronto Dominion Bank
TD
$197B
| $2.78M | 0.01% |
+45,736
| New | +$2.72M |
|
989
CALL
eBay
EBAY
$48.5B
| $2.78M | 0.01% |
841
-1,386
| -62% | -$48K |
|
990
RH
RH
$3.13B
| $2.77M | 0.01% |
+21,166
| New | +$2.97M |
|
991
Papa John's
PZZA
$991M
| $2.77M | 0.01% |
54,019
+8,205
| +18% | +$380K |
|
992
PUT
Churchill Downs
CHDN
$5.83B
| $2.75M | 0.01% |
594
+288
| +94% | +$13.7K |
|
993
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $2.75M | 0.01% |
1,091
+663
| +155% | +$16.7K |
|
994
PUT
Agios Pharmaceuticals
AGIO
$2.16B
| $2.75M | 0.01% |
356
-26
| -7% | -$2.09K |
|
|
KFYP
995
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $2.74M | 0.01% |
578
+264
| +84% | +$8.14K |
|
996
CALL
Gartner
IT
$8.83B
| $2.74M | 0.01% |
173
+148
| +592% | +$21.5K |
|
|
NBIS
997
Nebius Group N.V.
NBIS
$55.8B
| $2.74M | 0.01% |
83,360
-2,483
| -3% | -$84K |
|
998
CALL
Becton Dickinson
BDX
$42.2B
| $2.74M | 0.01% |
108
+29
| +37% | +$7.14K |
|
999
PUT
Microchip Technology
MCHP
$44.2B
| $2.74M | 0.01% |
694
-452
| -39% | -$20K |
|
1000
PUT
Digital Realty Trust
DLR
$66.4B
| $2.73M | 0.01% |
243
+81
| +50% | +$9.7K |
|
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.