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 | |
|---|---|---|---|---|---|---|
1601
CALL
Steel Dynamics
STLD
$35.6B
| $1.32M | ﹤0.01% |
293
+87
| +42% | +$4K |
|
|
DATA
1602
DELISTED
Tableau Software, Inc.
DATA
| $1.32M | ﹤0.01% |
11,841
+11,233
| +1,848% | +$1.21M |
|
1603
PUT
Transocean
RIG
$5.92B
| $1.32M | ﹤0.01% |
948
+517
| +120% | +$6.42K |
|
1604
CALL
OSI Systems
OSIS
$3.57B
| $1.32M | ﹤0.01% |
173
+4
| +2% | +$310 |
|
1605
Willis Towers Watson
WTW
$27.9B
| $1.32M | ﹤0.01% |
9,366
+8,725
| +1,361% | +$1.32M |
|
|
IRBT
1606
CALL
DELISTED
iRobot
IRBT
| $1.32M | ﹤0.01% |
120
-76
| -39% | -$7.15K |
|
1607
CALL
L3Harris
LHX
$55.9B
| $1.32M | ﹤0.01% |
78
+70
| +875% | +$11.1K |
|
1608
CALL
Yelp
YELP
$1.38B
| $1.32M | ﹤0.01% |
268
-609
| -69% | -$26.6K |
|
1609
VanEck Junior Gold Miners ETF
GDXJ
$7.06B
| $1.32M | ﹤0.01% |
48,110
-7,869
| -14% | -$233K |
|
|
TCO
1610
CALL
DELISTED
Taubman Centers Inc.
TCO
| $1.32M | ﹤0.01% |
220
+192
| +686% | +$11.8K |
|
1611
Telecom Argentina
TEO
$5.89B
| $1.31M | ﹤0.01% |
+75,507
| New | +$1.39M |
|
|
SAGE
1612
CALL
DELISTED
Sage Therapeutics
SAGE
| $1.31M | ﹤0.01% |
93
+9
| +11% | +$1.39K |
|
1613
PUT
National Health Investors
NHI
$3.9B
| $1.31M | ﹤0.01% |
173
-104
| -38% | -$7.94K |
|
1614
CALL
Equity Residential
EQR
$25.4B
| $1.3M | ﹤0.01% |
197
+194
| +6,467% | +$12.8K |
|
1615
PUT
Axogen
AXGN
$2.1B
| $1.3M | ﹤0.01% |
354
+331
| +1,439% | +$14.4K |
|
1616
PUT
Nice
NICE
$5.29B
| $1.3M | ﹤0.01% |
114
+96
| +533% | +$10.7K |
|
|
RTN
1617
DELISTED
Raytheon Company
RTN
| $1.3M | ﹤0.01% |
6,312
-10,173
| -62% | -$2.03M |
|
1618
CALL
Banco Macro
BMA
$5.7B
| $1.3M | ﹤0.01% |
315
+306
| +3,400% | +$16.4K |
|
1619
PUT
Roper Technologies
ROP
$36.3B
| $1.3M | ﹤0.01% |
44
-43
| -49% | -$12.7K |
|
1620
CALL
Consolidated Edison
ED
$41.6B
| $1.3M | ﹤0.01% |
171
+45
| +36% | +$3.55K |
|
1621
CALL
Pool Corp
POOL
$6.7B
| $1.3M | ﹤0.01% |
+78
| New | +$12.6K |
|
1622
PUT
OFG Bancorp
OFG
$2.21B
| $1.3M | ﹤0.01% |
805
+95
| +13% | +$1.54K |
|
1623
Lumen
LUMN
$6.53B
| $1.3M | ﹤0.01% |
61,279
+51,120
| +503% | +$1.07M |
|
1624
CALL
Insperity
NSP
$1.85B
| $1.3M | ﹤0.01% |
110
+85
| +340% | +$9.24K |
|
1625
CALL
Agios Pharmaceuticals
AGIO
$2.16B
| $1.29M | ﹤0.01% |
168
-33
| -16% | -$2.65K |
|
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.