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 | |
|---|---|---|---|---|---|---|
|
VMW
876
DELISTED
VMware, Inc
VMW
| $3.28M | 0.01% |
+21,033
| New | +$3.22M |
|
877
PUT
Madison Square Garden
MSGS
$9.72B
| $3.28M | 0.01% |
146
| – | – |
|
878
CALL
Mid-America Apartment Communities
MAA
$15.4B
| $3.27M | 0.01% |
327
+84
| +35% | +$8.5K |
|
879
CALL
Hain Celestial
HAIN
$48.8M
| $3.27M | 0.01% |
1,205
-405
| -25% | -$11.6K |
|
880
CALL
Nutanix
NTNX
$14.4B
| $3.26M | 0.01% |
764
+129
| +20% | +$6.81K |
|
881
CALL
Molson Coors Class B
TAP
$7.49B
| $3.26M | 0.01% |
530
-65
| -11% | -$4.3K |
|
882
Vipshop
VIPS
$6.94B
| $3.26M | 0.01% |
521,805
+448,246
| +609% | +$3.68M |
|
883
PUT
Advance Auto Parts
AAP
$3.29B
| $3.25M | 0.01% |
193
-210
| -52% | -$32.3K |
|
884
PUT
Zillow
Z
$6.83B
| $3.25M | 0.01% |
734
+226
| +44% | +$11.8K |
|
|
BNY
885
PUT
Bank of New York Mellon
BNY
$108B
| $3.24M | 0.01% |
636
-370
| -37% | -$19.5K |
|
|
DISCK
886
CALL
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $3.24M | 0.01% |
1,029
+6
| +0.6% | +$156 |
|
887
VanEck Gold Miners ETF
GDX
$22.9B
| $3.23M | 0.01% |
174,407
+51,868
| +42% | +$1.04M |
|
888
PUT
Yum! Brands
YUM
$40.7B
| $3.23M | 0.01% |
355
+257
| +262% | +$21.4K |
|
|
SBNY
889
PUT
DELISTED
Signature Bank
SBNY
| $3.23M | 0.01% |
281
+186
| +196% | +$21.9K |
|
890
PUT
Waste Management
WM
$95.9B
| $3.23M | 0.01% |
357
+3
| +0.8% | +$266 |
|
891
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $3.22M | 0.01% |
383
+231
| +152% | +$19.8K |
|
892
PUT
WIX.com
WIX
$2.02B
| $3.22M | 0.01% |
269
+137
| +104% | +$14.7K |
|
893
CALL
Diamondback Energy
FANG
$58.9B
| $3.22M | 0.01% |
238
-456
| -66% | -$58.2K |
|
|
ANDV
894
DELISTED
Andeavor
ANDV
| $3.21M | 0.01% |
20,948
-10,746
| -34% | -$1.59M |
|
895
PayPal
PYPL
$48.6B
| $3.21M | 0.01% |
36,544
+24,756
| +210% | +$2.18M |
|
896
Delta Air Lines
DAL
$53.4B
| $3.21M | 0.01% |
55,454
-63,064
| -53% | -$3.47M |
|
897
PUT
Bath & Body Works
BBWI
$3.89B
| $3.2M | 0.01% |
1,308
-131
| -9% | -$3.28K |
|
898
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.37B
| $3.2M | 0.01% |
126,155
+119,133
| +1,697% | +$2.99M |
|
|
GRMN
899
CALL
Garmin
GRMN
$46.1B
| $3.19M | 0.01% |
456
+350
| +330% | +$22.9K |
|
|
BLUE
900
CALL
DELISTED
bluebird bio
BLUE
| $3.18M | 0.01% |
17
-4
| -19% | -$8.26K |
|
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.