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 | |
|---|---|---|---|---|---|---|
1601
CALL
Bloomin' Brands
BLMN
$680M
| $1.23M | ﹤0.01% |
611
+13
| +2% | +$296 |
|
1602
Camping World
CWH
$363M
| $1.23M | ﹤0.01% |
49,118
+43,844
| +831% | +$1.09M |
|
1603
Ally Financial
ALLY
$13.1B
| $1.23M | ﹤0.01% |
46,636
+43,560
| +1,416% | +$1.16M |
|
1604
CALL
Universal Health Services
UHS
$9.43B
| $1.23M | ﹤0.01% |
110
-188
| -63% | -$22K |
|
1605
PUT
Oceaneering
OII
$5.26B
| $1.22M | ﹤0.01% |
481
-13
| -3% | -$291 |
|
1606
CALL
DTE Energy
DTE
$31.1B
| $1.22M | ﹤0.01% |
139
-209
| -60% | -$18.1K |
|
1607
CALL
Popular Inc
BPOP
$11B
| $1.22M | ﹤0.01% |
270
+158
| +141% | +$7.23K |
|
|
WW
1608
DELISTED
WW International
WW
| $1.22M | ﹤0.01% |
+12,069
| New | +$948K |
|
|
TWOU
1609
PUT
DELISTED
2U Inc
TWOU
| $1.22M | ﹤0.01% |
5
+1
| +25% | +$2.65K |
|
1610
CME Group
CME
$92.2B
| $1.22M | ﹤0.01% |
7,427
+7,269
| +4,601% | +$1.19M |
|
1611
Children's Place
PLCE
$53.6M
| $1.22M | ﹤0.01% |
10,076
+4,941
| +96% | +$640K |
|
1612
CALL
Paycom
PAYC
$6.78B
| $1.22M | ﹤0.01% |
123
+79
| +180% | +$8.52K |
|
|
SBNY
1613
PUT
DELISTED
Signature Bank
SBNY
| $1.21M | ﹤0.01% |
95
+68
| +252% | +$8.91K |
|
1614
PUT
Tandem Diabetes Care
TNDM
$1.17B
| $1.21M | ﹤0.01% |
+551
| New | +$6.78K |
|
1615
CALL
Blackstone
BX
$104B
| $1.21M | ﹤0.01% |
377
-1,363
| -78% | -$43.4K |
|
|
SRG
1616
CALL
Seritage Growth Properties
SRG
$130M
| $1.21M | ﹤0.01% |
285
+65
| +30% | +$2.54K |
|
1617
CALL
Philips
PHG
$25.4B
| $1.21M | ﹤0.01% |
368
+81
| +28% | +$2.59K |
|
1618
CALL
Apollo Global Management
APO
$70.7B
| $1.21M | ﹤0.01% |
379
+185
| +95% | +$5.66K |
|
|
USG
1619
PUT
DELISTED
Usg
USG
| $1.21M | ﹤0.01% |
280
+222
| +383% | +$9.22K |
|
1620
CALL
HSBC
HSBC
$355B
| $1.21M | ﹤0.01% |
272
-557
| -67% | -$25.5K |
|
|
SEE
1621
CALL
DELISTED
Sealed Air
SEE
| $1.21M | ﹤0.01% |
284
-12
| -4% | -$527 |
|
1622
PUT
Vale
VALE
$62.9B
| $1.21M | ﹤0.01% |
940
-427
| -31% | -$5.83K |
|
1623
CALL
United States Oil Fund
USO
$2.45B
| $1.2M | ﹤0.01% |
100
+30
| +43% | +$3.29K |
|
1624
CALL
BCE
BCE
$19.9B
| $1.2M | ﹤0.01% |
297
-51
| -15% | -$2.14K |
|
1625
PUT
Evercore
EVR
$13.1B
| $1.2M | ﹤0.01% |
114
+108
| +1,800% | +$11.1K |
|
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.