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 | |
|---|---|---|---|---|---|---|
|
TWOU
951
PUT
DELISTED
2U Inc
TWOU
| $2.92M | 0.01% |
13
+8
| +160% | +$19.8K |
|
|
ATH
952
PUT
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $2.92M | 0.01% |
565
+510
| +927% | +$24.6K |
|
953
CALL
First Trust Natural Gas ETF
FCG
$639M
| $2.92M | 0.01% |
249
+78
| +46% | +$1.77K |
|
954
CALL
Arrowhead Research
ARWR
$12.3B
| $2.91M | 0.01% |
1,520
+643
| +73% | +$10.6K |
|
955
Waste Management
WM
$95.2B
| $2.9M | 0.01% |
+32,075
| New | +$2.84M |
|
956
PUT
Tandem Diabetes Care
TNDM
$1.12B
| $2.9M | 0.01% |
676
+125
| +23% | +$4.37K |
|
|
JWN
957
CALL
DELISTED
Nordstrom
JWN
| $2.89M | 0.01% |
484
+179
| +59% | +$10.2K |
|
958
PUT
Teladoc Health
TDOC
$1.57B
| $2.89M | 0.01% |
335
+277
| +478% | +$19.7K |
|
959
CALL
Synopsys
SNPS
$71.4B
| $2.89M | 0.01% |
293
+77
| +36% | +$7.34K |
|
960
PUT
Dentsply Sirona
XRAY
$2.5B
| $2.89M | 0.01% |
765
+727
| +1,913% | +$30.3K |
|
961
CALL
GoDaddy
GDDY
$11.6B
| $2.88M | 0.01% |
346
+60
| +21% | +$4.68K |
|
962
Comcast
CMCSA
$80.6B
| $2.88M | 0.01% |
81,452
-182,542
| -69% | -$6.46M |
|
963
Take-Two Interactive
TTWO
$42.6B
| $2.88M | 0.01% |
+20,857
| New | +$2.66M |
|
964
CALL
Novartis
NVS
$296B
| $2.88M | 0.01% |
373
-323
| -46% | -$23.9K |
|
965
CALL
Viking Therapeutics
VKTX
$4.19B
| $2.87M | 0.01% |
1,648
+786
| +91% | +$9.35K |
|
|
HUYA
966
PUT
Huya Inc
HUYA
$551M
| $2.87M | 0.01% |
1,217
+1,109
| +1,027% | +$33K |
|
967
Direxion Daily Gold Miners Index Bear 2X ETF
DUST
$72.8M
| $2.86M | 0.01% |
+29
| New | +$2.44M |
|
968
PUT
CDW
CDW
$16.7B
| $2.85M | 0.01% |
321
+95
| +42% | +$8.22K |
|
969
CALL
Box
BOX
$3.9B
| $2.85M | 0.01% |
1,191
+26
| +2% | +$654 |
|
970
CALL
Snap-on
SNA
$21B
| $2.85M | 0.01% |
155
+100
| +182% | +$17.4K |
|
971
UnitedHealth
UNH
$384B
| $2.84M | 0.01% |
+10,680
| New | +$2.78M |
|
972
PUT
Lennox International
LII
$18.6B
| $2.84M | 0.01% |
130
+9
| +7% | +$1.96K |
|
973
PUT
Stellantis
STLA
$16.5B
| $2.84M | 0.01% |
1,622
-132
| -8% | -$2.33K |
|
974
CALL
MSCI
MSCI
$40.3B
| $2.84M | 0.01% |
160
+139
| +662% | +$24.1K |
|
|
BZUN
975
Baozun
BZUN
$143M
| $2.84M | 0.01% |
58,410
+45,035
| +337% | +$2.44M |
|
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.