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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1676
PUT
IQVIA
IQV
$34.7B
| $1.14M | ﹤0.01% |
+114
| New | +$11.4K |
|
|
TWNK
1677
CALL
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $1.14M | ﹤0.01% |
835
+747
| +849% | +$10.3K |
|
1678
PUT
Brighthouse Financial
BHF
$3.63B
| $1.13M | ﹤0.01% |
283
+99
| +54% | +$4.76K |
|
1679
EPAM Systems
EPAM
$4.69B
| $1.13M | ﹤0.01% |
9,115
+6,341
| +229% | +$763K |
|
1680
PUT
Enterprise Products Partners
EPD
$83.8B
| $1.13M | ﹤0.01% |
409
-79
| -16% | -$2.16K |
|
1681
CALL
Masco
MAS
$16B
| $1.13M | ﹤0.01% |
302
+65
| +27% | +$2.5K |
|
1682
Simon Property Group
SPG
$74.5B
| $1.13M | ﹤0.01% |
6,641
-2,167
| -25% | -$345K |
|
1683
CALL
Azenta
AZTA
$1.26B
| $1.13M | ﹤0.01% |
346
+99
| +40% | +$2.95K |
|
1684
PUT
Federated Hermes
FHI
$4.4B
| $1.13M | ﹤0.01% |
+484
| New | +$12.9K |
|
1685
CALL
Impinj
PI
$3.89B
| $1.13M | ﹤0.01% |
510
+297
| +139% | +$5.03K |
|
1686
CALL
Williams Companies
WMB
$90.5B
| $1.13M | ﹤0.01% |
416
-637
| -60% | -$16.8K |
|
1687
PUT
iShares Convertible Bond ETF
ICVT
$7.23B
| $1.13M | ﹤0.01% |
320
+170
| +113% | +$9.79K |
|
1688
Citigroup
C
$222B
| $1.12M | ﹤0.01% |
+16,739
| New | +$1.15M |
|
1689
CALL
Ferrari
RACE
$63.3B
| $1.12M | ﹤0.01% |
83
-129
| -61% | -$17K |
|
|
ENDP
1690
CALL
DELISTED
Endo International plc
ENDP
| $1.12M | ﹤0.01% |
1,188
+942
| +383% | +$6.33K |
|
|
ARRY
1691
CALL
DELISTED
Array Biopharma Inc
ARRY
| $1.12M | ﹤0.01% |
668
+171
| +34% | +$2.72K |
|
|
TSRO
1692
CALL
DELISTED
TESARO, Inc.
TSRO
| $1.12M | ﹤0.01% |
252
+180
| +250% | +$8.74K |
|
1693
CALL
British American Tobacco
BTI
$132B
| $1.12M | ﹤0.01% |
222
+143
| +181% | +$7.53K |
|
1694
CALL
TD Synnex
SNX
$19.4B
| $1.12M | ﹤0.01% |
232
+182
| +364% | +$9.7K |
|
|
AL
1695
PUT
DELISTED
Air Lease Corp
AL
| $1.12M | ﹤0.01% |
266
-182
| -41% | -$7.89K |
|
|
FDC
1696
PUT
DELISTED
First Data Corporation
FDC
| $1.11M | ﹤0.01% |
533
+405
| +316% | +$7.5K |
|
1697
PUT
Stryker
SYK
$127B
| $1.11M | ﹤0.01% |
66
+16
| +32% | +$2.69K |
|
1698
CALL
Visteon
VC
$2.77B
| $1.11M | ﹤0.01% |
86
+49
| +132% | +$6.13K |
|
1699
CALL
Welltower
WELL
$178B
| $1.11M | ﹤0.01% |
177
-77
| -30% | -$4.29K |
|
|
MIC
1700
PUT
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $1.11M | ﹤0.01% |
263
-214
| -45% | -$8.4K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.