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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1001
CALL
Five Below
FIVE
$11.3B
| $2.26M | 0.01% |
221
+52
| +31% | +$5.75K |
|
|
CRON
1002
PUT
Cronos Group
CRON
$1.05B
| $2.26M | 0.01% |
2,175
+470
| +28% | +$4.53K |
|
|
EBIX
1003
CALL
DELISTED
Ebix Inc
EBIX
| $2.26M | 0.01% |
531
+413
| +350% | +$22K |
|
|
BBBY
1004
CALL
Bed Bath & Beyond
BBBY
$470M
| $2.26M | 0.01% |
2,213
+1,691
| +324% | +$25.3K |
|
1005
PUT
KLA
KLAC
$280B
| $2.25M | 0.01% |
2,520
+260
| +12% | +$2.42K |
|
1006
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$248M
| $2.25M | 0.01% |
1,149
+1,143
| +19,050% | +$52.7K |
|
1007
CALL
Tapestry
TPR
$28.1B
| $2.25M | 0.01% |
667
+397
| +147% | +$16K |
|
1008
KB Home
KBH
$3.46B
| $2.25M | 0.01% |
117,734
+106,559
| +954% | +$2.19M |
|
|
1009
CALL
KLA
KLAC
$280B
| $2.25M | 0.01% |
2,510
-1,070
| -30% | -$9.96K |
|
|
TSG
1010
CALL
DELISTED
The Stars Group Inc.
TSG
| $2.25M | 0.01% |
1,359
+1,201
| +760% | +$23.5K |
|
1011
CALL
Vanguard Dividend Appreciation ETF
VIG
$111B
| $2.24M | 0.01% |
229
+194
| +554% | +$20.2K |
|
1012
PUT
Veeva Systems
VEEV
$29.9B
| $2.24M | 0.01% |
251
-101
| -29% | -$9.23K |
|
1013
CALL
Pricesmart
PSMT
$5.79B
| $2.24M | 0.01% |
379
+347
| +1,084% | +$23.9K |
|
1014
PUT
Ventas
VTR
$48.2B
| $2.23M | 0.01% |
381
+120
| +46% | +$7.08K |
|
1015
CALL
First Solar
FSLR
$21.8B
| $2.23M | 0.01% |
525
-396
| -43% | -$17.4K |
|
1016
State Street SPDR S&P Regional Banking ETF
KRE
$4.84B
| $2.23M | 0.01% |
47,569
+46,221
| +3,429% | +$2.47M |
|
1017
Aflac
AFL
$63.6B
| $2.21M | 0.01% |
48,615
+7,125
| +17% | +$317K |
|
1018
PUT
GameStop
GME
$9.59B
| $2.21M | 0.01% |
7,020
-2,248
| -24% | -$7.87K |
|
1019
CALL
Bath & Body Works
BBWI
$3.91B
| $2.21M | 0.01% |
1,066
-144
| -12% | -$3.63K |
|
|
GWPH
1020
CALL
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $2.21M | 0.01% |
227
+101
| +80% | +$13.3K |
|
1021
PUT
PPG Industries
PPG
$25.6B
| $2.21M | 0.01% |
216
-13
| -6% | -$1.35K |
|
1022
CALL
HDFC Bank
HDB
$120B
| $2.21M | 0.01% |
852
+180
| +27% | +$4.25K |
|
1023
CALL
Public Storage
PSA
$59.6B
| $2.21M | 0.01% |
109
-149
| -58% | -$30.4K |
|
1024
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$106M
| $2.2M | 0.01% |
1,005
-311
| -24% | -$6.72K |
|
1025
PUT
Deckers Outdoor
DECK
$12.9B
| $2.2M | 0.01% |
1,032
-228
| -18% | -$4.62K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.