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 | |
|---|---|---|---|---|---|---|
1826
PUT
Nabors Industries
NBR
$1.23B
| $1.06M | ﹤0.01% |
35
-6
| -15% | -$1.85K |
|
1827
PUT
Murphy USA
MUSA
$11.3B
| $1.06M | ﹤0.01% |
124
+122
| +6,100% | +$10.1K |
|
1828
Old Dominion Freight Line
ODFL
$48.5B
| $1.06M | ﹤0.01% |
19,689
+19,482
| +9,412% | +$986K |
|
1829
CALL
Travere Therapeutics
TVTX
$5.33B
| $1.06M | ﹤0.01% |
368
+367
| +36,700% | +$10.5K |
|
1830
Aon
AON
$77.3B
| $1.06M | ﹤0.01% |
+6,872
| New | +$1.01M |
|
|
CIT
1831
PUT
DELISTED
CIT Group Inc.
CIT
| $1.05M | ﹤0.01% |
204
+80
| +65% | +$4.26K |
|
1832
PUT
Northern Trust
NTRS
$22.2B
| $1.05M | ﹤0.01% |
103
+77
| +296% | +$8.24K |
|
|
EGN
1833
CALL
DELISTED
Energen
EGN
| $1.05M | ﹤0.01% |
122
+76
| +165% | +$5.79K |
|
1834
Digital Realty Trust
DLR
$73.7B
| $1.05M | ﹤0.01% |
+9,340
| New | +$1.12M |
|
1835
PUT
Iridium Communications
IRDM
$4.85B
| $1.05M | ﹤0.01% |
467
+324
| +227% | +$6.29K |
|
|
YRD
1836
Yiren Digital
YRD
$103M
| $1.05M | ﹤0.01% |
+57,087
| New | +$1.04M |
|
|
DM
1837
PUT
DELISTED
Dominion Energy Midstream Ptr LP
DM
| $1.05M | ﹤0.01% |
586
+440
| +301% | +$7.05K |
|
1838
CALL
Integra LifeSciences
IART
$1.54B
| $1.05M | ﹤0.01% |
159
+41
| +35% | +$2.55K |
|
1839
PUT
TriNet
TNET
$2.84B
| $1.05M | ﹤0.01% |
186
+150
| +417% | +$8.43K |
|
1840
Avis
CAR
$5.63B
| $1.04M | ﹤0.01% |
32,506
+26,268
| +421% | +$876K |
|
1841
CALL
Azenta
AZTA
$1.26B
| $1.04M | ﹤0.01% |
297
-49
| -14% | -$1.61K |
|
1842
BlackBerry
BB
$5.01B
| $1.04M | ﹤0.01% |
91,401
+76,371
| +508% | +$780K |
|
1843
CALL
SolarEdge
SEDG
$2.59B
| $1.04M | ﹤0.01% |
276
+9
| +3% | +$433 |
|
1844
PUT
LPL Financial
LPLA
$26.3B
| $1.04M | ﹤0.01% |
161
-51
| -24% | -$3.38K |
|
|
PPL
1845
CALL
PPL Corp
PPL
$27.3B
| $1.04M | ﹤0.01% |
355
+13
| +4% | +$380 |
|
1846
PUT
ArcelorMittal
MT
$50.4B
| $1.04M | ﹤0.01% |
336
-149
| -31% | -$4.52K |
|
1847
CALL
National Health Investors
NHI
$3.9B
| $1.03M | ﹤0.01% |
137
-91
| -40% | -$6.95K |
|
1848
CALL
Ecolab
ECL
$75.6B
| $1.03M | ﹤0.01% |
66
+42
| +175% | +$6.23K |
|
1849
CALL
Jacobs Solutions
J
$15.9B
| $1.03M | ﹤0.01% |
163
+74
| +83% | +$4.34K |
|
1850
CALL
Upbound Group
UPBD
$1.19B
| $1.03M | ﹤0.01% |
717
+108
| +18% | +$1.59K |
|
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.