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 | |
|---|---|---|---|---|---|---|
1876
PUT
Southwest Airlines
LUV
$22.1B
| $1.01M | ﹤0.01% |
162
-691
| -81% | -$40.4K |
|
1877
PUT
BGC Group
BGC
$5.58B
| $1.01M | ﹤0.01% |
1,330
-416
| -24% | -$3.08K |
|
|
CMA
1878
CALL
DELISTED
Comerica
CMA
| $1.01M | ﹤0.01% |
112
-26
| -19% | -$2.48K |
|
1879
CALL
Asure Software
ASUR
$220M
| $1.01M | ﹤0.01% |
812
+618
| +319% | +$9K |
|
1880
PUT
NCR Voyix
VYX
$1.06B
| $1.01M | ﹤0.01% |
579
+465
| +408% | +$8.28K |
|
|
CLVS
1881
DELISTED
Clovis Oncology, Inc.
CLVS
| $1.01M | ﹤0.01% |
34,327
+23,227
| +209% | +$899K |
|
|
RDFN
1882
PUT
DELISTED
Redfin
RDFN
| $1.01M | ﹤0.01% |
539
+415
| +335% | +$8.78K |
|
1883
PUT
Monolithic Power Systems
MPWR
$65.5B
| $1M | ﹤0.01% |
80
-37
| -32% | -$5.16K |
|
1884
Ally Financial
ALLY
$13.1B
| $1M | ﹤0.01% |
37,930
-8,706
| -19% | -$236K |
|
|
TWNK
1885
CALL
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $1M | ﹤0.01% |
906
+71
| +9% | +$906 |
|
|
SAFM
1886
CALL
DELISTED
Sanderson Farms Inc
SAFM
| $1M | ﹤0.01% |
97
+92
| +1,840% | +$9.5K |
|
1887
CALL
Hewlett Packard
HPE
$63.2B
| $1M | ﹤0.01% |
669
+471
| +238% | +$7.54K |
|
1888
Wyndham Hotels & Resorts
WH
$5.46B
| $1M | ﹤0.01% |
18,014
+5,565
| +45% | +$318K |
|
1889
CALL
Editas Medicine
EDIT
$399M
| $999K | ﹤0.01% |
314
+135
| +75% | +$4.36K |
|
1890
PUT
Church & Dwight Co
CHD
$23.1B
| $997K | ﹤0.01% |
168
-527
| -76% | -$29.8K |
|
1891
CALL
Cimpress
CMPR
$2.37B
| $997K | ﹤0.01% |
73
-3
| -4% | -$433 |
|
1892
CALL
Wabtec
WAB
$51.1B
| $996K | ﹤0.01% |
95
-110
| -54% | -$11.9K |
|
1893
Omeros
OMER
$709M
| $995K | ﹤0.01% |
40,787
+14,464
| +55% | +$323K |
|
1894
Goodyear
GT
$2.07B
| $994K | ﹤0.01% |
42,502
+8,569
| +25% | +$201K |
|
|
BRSL
1895
CALL
Brightstar Lottery PLC
BRSL
$1.91B
| $993K | ﹤0.01% |
503
-852
| -63% | -$18.6K |
|
1896
CALL
GameStop
GME
$9.5B
| $992K | ﹤0.01% |
2,600
-4,108
| -61% | -$15.7K |
|
1897
PUT
Huazhu Hotels Group
HTHT
$12.4B
| $991K | ﹤0.01% |
307
-23
| -7% | -$808 |
|
1898
PUT
Prothena Corp
PRTA
$458M
| $990K | ﹤0.01% |
757
+204
| +37% | +$2.95K |
|
|
THS
1899
CALL
DELISTED
Treehouse Foods
THS
| $990K | ﹤0.01% |
207
+62
| +43% | +$3.19K |
|
1900
CALL
Ternium
TX
$9.29B
| $990K | ﹤0.01% |
327
+288
| +738% | +$9.12K |
|
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.