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 | |
|---|---|---|---|---|---|---|
|
RETA
2926
PUT
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $376K | ﹤0.01% |
+46
| New | +$3.24K |
|
|
SNV
2927
CALL
DELISTED
Synovus
SNV
| $375K | ﹤0.01% |
82
+28
| +52% | +$1.41K |
|
2928
Workiva
WK
$2.94B
| $374K | ﹤0.01% |
9,469
+4,939
| +109% | +$154K |
|
2929
CALL
Ryder
R
$10.3B
| $372K | ﹤0.01% |
51
-29
| -36% | -$2.21K |
|
|
SAFM
2930
PUT
DELISTED
Sanderson Farms Inc
SAFM
| $372K | ﹤0.01% |
36
-212
| -85% | -$21.9K |
|
|
AGN
2931
DELISTED
Allergan plc
AGN
| $372K | ﹤0.01% |
1,953
-15,242
| -89% | -$2.8M |
|
2932
Coeur Mining
CDE
$15.6B
| $371K | ﹤0.01% |
+69,746
| New | +$451K |
|
2933
CALL
Commercial Metals
CMC
$7.63B
| $371K | ﹤0.01% |
181
+10
| +6% | +$215 |
|
2934
PUT
Fortune Brands Innovations
FBIN
$6.12B
| $371K | ﹤0.01% |
83
+72
| +655% | +$3.38K |
|
2935
CALL
Bilibili
BILI
$7.18B
| $370K | ﹤0.01% |
275
+209
| +317% | +$2.6K |
|
2936
PUT
MakeMyTrip
MMYT
$4.67B
| $370K | ﹤0.01% |
135
+133
| +6,650% | +$4.24K |
|
|
NVRO
2937
PUT
DELISTED
NEVRO CORP.
NVRO
| $370K | ﹤0.01% |
65
+34
| +110% | +$2.13K |
|
|
CHUY
2938
CALL
DELISTED
Chuy's Holdings, Inc. Common Stock
CHUY
| $370K | ﹤0.01% |
141
+131
| +1,310% | +$3.86K |
|
|
ADMS
2939
DELISTED
Adamas Pharmaceuticals
ADMS
| $370K | ﹤0.01% |
18,501
+13,137
| +245% | +$308K |
|
|
XEC
2940
DELISTED
CIMAREX ENERGY CO
XEC
| $370K | ﹤0.01% |
3,989
+1,391
| +54% | +$128K |
|
2941
CALL
Dorman Products
DORM
$4.01B
| $369K | ﹤0.01% |
48
+2
| +4% | +$153 |
|
2942
CALL
Pacific Biosciences
PACB
$422M
| $368K | ﹤0.01% |
+681
| New | +$2.92K |
|
|
GMS
2943
DELISTED
GMS Inc
GMS
| $367K | ﹤0.01% |
15,820
+14,116
| +828% | +$358K |
|
|
NS
2944
PUT
DELISTED
NuStar Energy L.P.
NS
| $366K | ﹤0.01% |
132
+82
| +164% | +$2.17K |
|
|
BRS
2945
PUT
DELISTED
Bristow Group, Inc.
BRS
| $366K | ﹤0.01% |
302
+31
| +11% | +$383 |
|
2946
PUT
Adient
ADNT
$1.6B
| $365K | ﹤0.01% |
93
+16
| +21% | +$721 |
|
2947
Dropbox
DBX
$6.81B
| $365K | ﹤0.01% |
+13,631
| New | +$394K |
|
2948
PUT
Stepan Co
SCL
$1.31B
| $365K | ﹤0.01% |
+42
| New | +$3.62K |
|
|
BITA
2949
CALL
DELISTED
Bitauto Holdings Limited
BITA
| $365K | ﹤0.01% |
159
-16
| -9% | -$365 |
|
2950
Tapestry
TPR
$28.8B
| $364K | ﹤0.01% |
7,253
-8,861
| -55% | -$434K |
|
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.