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 | |
|---|---|---|---|---|---|---|
801
CALL
Exelon
EXC
$47.8B
| $3.71M | 0.01% |
1,190
+656
| +123% | +$20.2K |
|
|
KSU
802
PUT
DELISTED
Kansas City Southern
KSU
| $3.7M | 0.01% |
327
+211
| +182% | +$24K |
|
|
ESPR
803
PUT
DELISTED
Esperion Therapeutics
ESPR
| $3.69M | 0.01% |
831
+276
| +50% | +$12.7K |
|
804
CALL
HP
HPQ
$23B
| $3.69M | 0.01% |
1,430
+1,240
| +653% | +$30K |
|
805
PUT
Ionis Pharmaceuticals
IONS
$8.93B
| $3.68M | 0.01% |
713
+231
| +48% | +$10.9K |
|
|
ALXN
806
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $3.67M | 0.01% |
264
-522
| -66% | -$65.5K |
|
807
GE Aerospace
GE
$354B
| $3.66M | 0.01% |
+67,614
| New | +$4.17M |
|
|
I
808
CALL
DELISTED
INTELSAT S. A.
I
| $3.65M | 0.01% |
1,217
-206
| -14% | -$4.51K |
|
809
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $3.65M | 0.01% |
1,440
+938
| +187% | +$21.7K |
|
810
PUT
Alnylam Pharmaceuticals
ALNY
$35.6B
| $3.65M | 0.01% |
417
+370
| +787% | +$37.2K |
|
811
CALL
KLA
KLAC
$280B
| $3.64M | 0.01% |
3,580
-1,030
| -22% | -$11.3K |
|
|
BIG
812
PUT
DELISTED
Big Lots, Inc.
BIG
| $3.64M | 0.01% |
871
+349
| +67% | +$15.4K |
|
813
PUT
Yelp
YELP
$1.36B
| $3.63M | 0.01% |
739
-174
| -19% | -$7.6K |
|
814
PG&E
PCG
$39.9B
| $3.63M | 0.01% |
78,867
-140,157
| -64% | -$6.24M |
|
815
PUT
Affiliated Managers Group
AMG
$9.16B
| $3.62M | 0.01% |
265
+61
| +30% | +$9.01K |
|
816
CALL
Synaptics
SYNA
$4.71B
| $3.62M | 0.01% |
794
-104
| -12% | -$4.95K |
|
817
CALL
LendingTree
TREE
$578M
| $3.61M | 0.01% |
157
-23
| -13% | -$5.47K |
|
818
PUT
Becton Dickinson
BDX
$42.2B
| $3.6M | 0.01% |
141
-139
| -50% | -$34.2K |
|
|
LPNT
819
PUT
DELISTED
LifePoint Health, Inc.
LPNT
| $3.6M | 0.01% |
559
+511
| +1,065% | +$31.1K |
|
820
CALL
Cardinal Health
CAH
$51.7B
| $3.6M | 0.01% |
666
+190
| +40% | +$9.72K |
|
|
COL
821
PUT
DELISTED
Rockwell Collins
COL
| $3.6M | 0.01% |
256
+123
| +92% | +$16.9K |
|
822
Stanley Black & Decker
SWK
$13.9B
| $3.58M | 0.01% |
+24,483
| New | +$3.48M |
|
823
CALL
TripAdvisor
TRIP
$1.61B
| $3.58M | 0.01% |
702
-292
| -29% | -$16K |
|
824
CALL
Lumen
LUMN
$6.9B
| $3.58M | 0.01% |
1,690
+417
| +33% | +$8.72K |
|
|
NLSN
825
PUT
DELISTED
Nielsen Holdings plc
NLSN
| $3.58M | 0.01% |
1,295
+1,279
| +7,994% | +$34.4K |
|
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.