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 | |
|---|---|---|---|---|---|---|
1726
PUT
Cooper-Standard Automotive
CPS
$504M
| $1.18M | ﹤0.01% |
98
+96
| +4,800% | +$12.9K |
|
1727
PUT
Rush Enterprises Class A
RUSHA
$5.95B
| $1.18M | ﹤0.01% |
673
+596
| +774% | +$11.4K |
|
1728
CALL
Celanese
CE
$5.09B
| $1.17M | ﹤0.01% |
103
-74
| -42% | -$8.48K |
|
|
LHCG
1729
PUT
DELISTED
LHC Group LLC
LHCG
| $1.17M | ﹤0.01% |
114
+5
| +5% | +$468 |
|
1730
CALL
Inogen
INGN
$167M
| $1.17M | ﹤0.01% |
48
+24
| +100% | +$5.55K |
|
|
CLDR
1731
DELISTED
Cloudera, Inc.
CLDR
| $1.17M | ﹤0.01% |
66,346
+32,140
| +94% | +$488K |
|
1732
PUT
Insmed
INSM
$23.2B
| $1.17M | ﹤0.01% |
579
-179
| -24% | -$4.04K |
|
|
ORBK
1733
PUT
DELISTED
Orbotech Ltd
ORBK
| $1.17M | ﹤0.01% |
197
-171
| -46% | -$10.7K |
|
1734
CALL
Air Products & Chemicals
APD
$66.3B
| $1.17M | ﹤0.01% |
70
-61
| -47% | -$9.93K |
|
1735
CALL
Oshkosh
OSK
$9.67B
| $1.17M | ﹤0.01% |
164
+134
| +447% | +$9.65K |
|
|
STI
1736
PUT
DELISTED
SunTrust Banks, Inc.
STI
| $1.17M | ﹤0.01% |
175
-243
| -58% | -$17.3K |
|
|
CBPO
1737
PUT
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $1.17M | ﹤0.01% |
146
+50
| +52% | +$4.66K |
|
1738
PUT
IQVIA
IQV
$34.7B
| $1.17M | ﹤0.01% |
90
-24
| -21% | -$2.88K |
|
1739
iShares Russell 2000 Growth ETF
IWO
$14.5B
| $1.17M | ﹤0.01% |
5,427
+316
| +6% | +$67.4K |
|
1740
PUT
Goosehead Insurance
GSHD
$1.39B
| $1.17M | ﹤0.01% |
+344
| New | +$9.97K |
|
1741
CALL
American Eagle Outfitters
AEO
$2.85B
| $1.16M | ﹤0.01% |
469
-195
| -29% | -$4.94K |
|
1742
United States Brent Oil Fund
BNO
$815M
| $1.16M | ﹤0.01% |
+49,763
| New | +$1.06M |
|
1743
CALL
Nelnet
NNI
$4.79B
| $1.16M | ﹤0.01% |
203
+160
| +372% | +$9.37K |
|
1744
PUT
Peabody Energy
BTU
$2.78B
| $1.16M | ﹤0.01% |
325
-23
| -7% | -$987 |
|
1745
CALL
NovoCure
NVCR
$2.04B
| $1.16M | ﹤0.01% |
221
+188
| +570% | +$7.48K |
|
1746
PUT
Kinder Morgan
KMI
$73.1B
| $1.16M | ﹤0.01% |
653
+432
| +195% | +$7.72K |
|
1747
CALL
HSBC
HSBC
$355B
| $1.16M | ﹤0.01% |
276
+4
| +1% | +$173 |
|
|
CASA
1748
PUT
DELISTED
Casa Systems, Inc. Common Stock
CASA
| $1.16M | ﹤0.01% |
784
+616
| +367% | +$9.37K |
|
|
SFIX
1749
PUT
Stitch Fix
SFIX
$478M
| $1.15M | ﹤0.01% |
263
+81
| +45% | +$2.95K |
|
|
CRON
1750
CALL
Cronos Group
CRON
$1.05B
| $1.15M | ﹤0.01% |
1,035
+488
| +89% | +$4.14K |
|
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.