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 | |
|---|---|---|---|---|---|---|
701
CALL
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $4.33M | 0.01% |
1,652
-468
| -22% | -$22.2K |
|
702
PUT
Clorox
CLX
$11.6B
| $4.33M | 0.01% |
288
+246
| +586% | +$34.9K |
|
703
CALL
Mohawk Industries
MHK
$6.73B
| $4.33M | 0.01% |
247
+106
| +75% | +$20.8K |
|
704
New Oriental
EDU
$7.75B
| $4.33M | 0.01% |
58,497
+14,492
| +33% | +$1.2M |
|
705
Halliburton
HAL
$27.6B
| $4.31M | 0.01% |
106,306
+47,589
| +81% | +$1.97M |
|
706
PUT
J.M. Smucker
SJM
$12.6B
| $4.29M | 0.01% |
418
-336
| -45% | -$36.7K |
|
707
CALL
Amdocs
DOX
$5.44B
| $4.29M | 0.01% |
650
+516
| +385% | +$34.1K |
|
708
CALL
Boston Beer
SAM
$1.81B
| $4.28M | 0.01% |
149
+140
| +1,556% | +$42K |
|
|
AABA
709
DELISTED
Altaba Inc
AABA
| $4.28M | 0.01% |
62,759
+13,927
| +29% | +$981K |
|
710
PUT
NetApp
NTAP
$32.6B
| $4.27M | 0.01% |
497
-94
| -16% | -$7.77K |
|
711
PUT
Southern Company
SO
$108B
| $4.25M | 0.01% |
975
+749
| +331% | +$34.5K |
|
712
CALL
PTC
PTC
$13.1B
| $4.25M | 0.01% |
400
+316
| +376% | +$30.9K |
|
713
CALL
Dominion Energy
D
$62.5B
| $4.24M | 0.01% |
603
-23
| -4% | -$1.63K |
|
|
CRC
714
PUT
DELISTED
California Resources Corporation
CRC
| $4.22M | 0.01% |
870
+213
| +32% | +$8.2K |
|
715
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14.2B
| $4.22M | 0.01% |
78,238
+34,235
| +78% | +$1.84M |
|
716
CALL
Huntsman Corp
HUN
$2.32B
| $4.22M | 0.01% |
1,549
+1,292
| +503% | +$39.4K |
|
717
CALL
Gen Digital
GEN
$15.4B
| $4.21M | 0.01% |
1,978
+1,027
| +108% | +$20.9K |
|
|
ICPT
718
PUT
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $4.21M | 0.01% |
333
+211
| +173% | +$22.3K |
|
719
CALL
Globus Medical
GMED
$10.2B
| $4.21M | 0.01% |
741
+705
| +1,958% | +$37.1K |
|
720
Las Vegas Sands
LVS
$30B
| $4.2M | 0.01% |
+70,735
| New | +$4.75M |
|
|
GWPH
721
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $4.2M | 0.01% |
24,291
+14,326
| +144% | +$2.07M |
|
722
lululemon athletica
LULU
$12.9B
| $4.19M | 0.01% |
+25,790
| New | +$3.54M |
|
723
PUT
CME Group
CME
$90.1B
| $4.19M | 0.01% |
246
-32
| -12% | -$5.39K |
|
|
PARA
724
PUT
DELISTED
Paramount Global Class B
PARA
| $4.18M | 0.01% |
727
+325
| +81% | +$17.9K |
|
725
Dollar Tree
DLTR
$23.5B
| $4.17M | 0.01% |
51,176
+32,688
| +177% | +$2.87M |
|
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.