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 | |
|---|---|---|---|---|---|---|
1526
CALL
Herc Holdings
HRI
$5.41B
| $1.45M | ﹤0.01% |
283
-28
| -9% | -$1.51K |
|
1527
CALL
Urban Outfitters
URBN
$6.01B
| $1.45M | ﹤0.01% |
354
-223
| -39% | -$10K |
|
1528
CALL
Casey's General Stores
CASY
$31.6B
| $1.45M | ﹤0.01% |
112
-32
| -22% | -$3.68K |
|
1529
PUT
IDEX
IEX
$16.5B
| $1.45M | ﹤0.01% |
96
| – | – |
|
|
TIVO
1530
CALL
DELISTED
Tivo Inc
TIVO
| $1.45M | ﹤0.01% |
1,161
+638
| +122% | +$8.25K |
|
1531
PUT
United Natural Foods
UNFI
$2.99B
| $1.44M | ﹤0.01% |
482
+139
| +41% | +$5.03K |
|
1532
CALL
Dillards
DDS
$8.88B
| $1.44M | ﹤0.01% |
189
+168
| +800% | +$13.6K |
|
1533
PUT
Agnico Eagle Mines
AEM
$72.3B
| $1.44M | ﹤0.01% |
420
+164
| +64% | +$6.39K |
|
|
MZOR
1534
CALL
DELISTED
Mazor Robotics Ltd.
MZOR
| $1.43M | ﹤0.01% |
245
+121
| +98% | +$6.46K |
|
1535
CALL
LivaNova
LIVN
$4.28B
| $1.43M | ﹤0.01% |
115
-42
| -27% | -$4.95K |
|
|
SINA
1536
CALL
DELISTED
Sina Corp
SINA
| $1.42M | ﹤0.01% |
207
+149
| +257% | +$11.2K |
|
1537
PUT
Alarm.com
ALRM
$2.58B
| $1.42M | ﹤0.01% |
248
+58
| +31% | +$2.92K |
|
1538
Vodafone
VOD
$35B
| $1.42M | ﹤0.01% |
+65,570
| New | +$1.52M |
|
1539
PUT
BHP
BHP
$212B
| $1.42M | ﹤0.01% |
319
+42
| +15% | +$1.82K |
|
1540
PUT
Ventas
VTR
$48.9B
| $1.42M | ﹤0.01% |
261
-11
| -4% | -$637 |
|
1541
PUT
Hain Celestial
HAIN
$48.7M
| $1.42M | ﹤0.01% |
523
-520
| -50% | -$14.8K |
|
1542
PUT
Kearny Financial
KRNY
$592M
| $1.42M | ﹤0.01% |
1,024
-39
| -4% | -$536 |
|
1543
AutoNation
AN
$6.97B
| $1.42M | ﹤0.01% |
34,104
+26,787
| +366% | +$1.24M |
|
1544
CALL
Scotiabank
BNS
$106B
| $1.41M | ﹤0.01% |
237
+21
| +10% | +$1.23K |
|
1545
Walt Disney
DIS
$165B
| $1.41M | ﹤0.01% |
12,030
-11,152
| -48% | -$1.24M |
|
1546
CALL
Thor Industries
THO
$4B
| $1.41M | ﹤0.01% |
168
+88
| +110% | +$8.42K |
|
|
SEP
1547
CALL
DELISTED
Spectra Engy Parters Lp
SEP
| $1.41M | ﹤0.01% |
394
+382
| +3,183% | +$14.1K |
|
|
BBL
1548
DELISTED
BHP Group Plc American Depositary Shares (Each representing two Ordinary Shares)
BBL
| $1.41M | ﹤0.01% |
+31,954
| New | +$1.38M |
|
1549
PUT
AMC Entertainment Holdings
AMC
$2.08B
| $1.4M | ﹤0.01% |
69
-38
| -36% | -$6.88K |
|
|
CATM
1550
CALL
DELISTED
Cardtronics plc Class A Ordinary Shares (UK)
CATM
| $1.4M | ﹤0.01% |
444
+303
| +215% | +$9.31K |
|
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.