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 | |
|---|---|---|---|---|---|---|
1576
CALL
Tapestry
TPR
$28.8B
| $1.36M | ﹤0.01% |
270
+35
| +15% | +$1.71K |
|
1577
PUT
ING
ING
$93.8B
| $1.36M | ﹤0.01% |
1,046
-18
| -2% | -$252 |
|
|
MDR
1578
PUT
DELISTED
McDermott International
MDR
| $1.35M | ﹤0.01% |
736
-1,091
| -60% | -$20.4K |
|
1579
CALL
Mattel
MAT
$4.17B
| $1.35M | ﹤0.01% |
863
+234
| +37% | +$3.75K |
|
1580
CALL
BCE
BCE
$19.9B
| $1.35M | ﹤0.01% |
334
+37
| +12% | +$1.52K |
|
|
CLVS
1581
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $1.35M | ﹤0.01% |
461
+370
| +407% | +$14.3K |
|
1582
CALL
TechnipFMC
FTI
$30.6B
| $1.35M | ﹤0.01% |
581
+531
| +1,062% | +$12K |
|
|
GBT
1583
PUT
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $1.35M | ﹤0.01% |
355
+7
| +2% | +$310 |
|
|
VRNT
1584
CALL
DELISTED
Verint Systems
VRNT
| $1.35M | ﹤0.01% |
528
+245
| +87% | +$5.96K |
|
1585
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
$3.42B
| $1.34M | ﹤0.01% |
7,772
+6,049
| +351% | +$1.02M |
|
1586
Gilead Sciences
GILD
$161B
| $1.34M | ﹤0.01% |
17,400
-31,606
| -64% | -$2.39M |
|
1587
PUT
OSI Systems
OSIS
$3.57B
| $1.34M | ﹤0.01% |
176
+103
| +141% | +$8K |
|
|
MRO
1588
CALL
DELISTED
Marathon Oil Corporation
MRO
| $1.34M | ﹤0.01% |
577
-596
| -51% | -$12.5K |
|
1589
CALL
Exelixis
EXEL
$13.9B
| $1.34M | ﹤0.01% |
757
-88
| -10% | -$1.72K |
|
1590
PUT
Wyndham Hotels & Resorts
WH
$5.5B
| $1.34M | ﹤0.01% |
241
-27
| -10% | -$1.54K |
|
1591
CALL
Snap
SNAP
$7.32B
| $1.34M | ﹤0.01% |
1,579
-2,754
| -64% | -$32K |
|
1592
CALL
BlackBerry
BB
$5.01B
| $1.34M | ﹤0.01% |
1,175
+963
| +454% | +$9.84K |
|
1593
CALL
Invesco
IVZ
$13.3B
| $1.34M | ﹤0.01% |
584
+329
| +129% | +$8.22K |
|
|
AIMT
1594
CALL
DELISTED
Aimmune Therapeutics
AIMT
| $1.34M | ﹤0.01% |
490
+18
| +4% | +$509 |
|
1595
State Street Materials Select Sector SPDR ETF
XLB
$8.51B
| $1.33M | ﹤0.01% |
46,040
+33,760
| +275% | +$996K |
|
1596
PUT
Silicon Laboratories
SLAB
$7.15B
| $1.33M | ﹤0.01% |
145
-52
| -26% | -$5.08K |
|
1597
CALL
DXC Technology
DXC
$1.63B
| $1.33M | ﹤0.01% |
211
-294
| -58% | -$26K |
|
1598
CALL
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.9M
| $1.33M | ﹤0.01% |
105
+71
| +209% | +$8.97K |
|
1599
CALL
Omeros
OMER
$709M
| $1.33M | ﹤0.01% |
544
+348
| +178% | +$7.76K |
|
|
AERI
1600
DELISTED
Aerie Pharmaceuticals
AERI
| $1.33M | ﹤0.01% |
21,553
+13,857
| +180% | +$891K |
|
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.