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 | |
|---|---|---|---|---|---|---|
2126
CALL
Live Oak Bancshares
LOB
$1.95B
| $787K | ﹤0.01% |
294
+232
| +374% | +$6.95K |
|
2127
CALL
Pitney Bowes
PBI
$2.42B
| $787K | ﹤0.01% |
1,112
+1,020
| +1,109% | +$8.24K |
|
2128
PUT
Philips
PHG
$25.4B
| $787K | ﹤0.01% |
223
+7
| +3% | +$239 |
|
2129
CALL
Boot Barn
BOOT
$4.55B
| $786K | ﹤0.01% |
277
+178
| +180% | +$4.7K |
|
2130
PUT
Huntsman Corp
HUN
$2.24B
| $786K | ﹤0.01% |
289
+96
| +50% | +$2.92K |
|
2131
Ovintiv
OVV
$17.5B
| $784K | ﹤0.01% |
11,975
+11,544
| +2,678% | +$748K |
|
2132
CALL
Tyler Technologies
TYL
$12.2B
| $784K | ﹤0.01% |
32
-10
| -24% | -$2.38K |
|
2133
CALL
CDW
CDW
$17.1B
| $782K | ﹤0.01% |
88
+73
| +487% | +$6.31K |
|
2134
CALL
Boyd Gaming
BYD
$6.47B
| $781K | ﹤0.01% |
231
+60
| +35% | +$2.14K |
|
|
OPLN
2135
PUT
Openlane
OPLN
$4.17B
| $781K | ﹤0.01% |
346
+335
| +3,045% | +$7.73K |
|
|
CRZO
2136
PUT
DELISTED
Carrizo Oil & Gas Inc
CRZO
| $781K | ﹤0.01% |
310
+37
| +14% | +$955 |
|
2137
PUT
KKR & Co
KKR
$89.2B
| $779K | ﹤0.01% |
286
+179
| +167% | +$4.78K |
|
2138
PUT
Dana Inc
DAN
$2.91B
| $778K | ﹤0.01% |
417
-70
| -14% | -$1.41K |
|
|
HEES
2139
PUT
DELISTED
H&E Equipment Services
HEES
| $778K | ﹤0.01% |
206
+142
| +222% | +$5.14K |
|
2140
CALL
Pacira BioSciences
PCRX
$1.02B
| $776K | ﹤0.01% |
158
+141
| +829% | +$6.09K |
|
2141
PUT
Intellia Therapeutics
NTLA
$1.5B
| $775K | ﹤0.01% |
271
-46
| -15% | -$1.34K |
|
|
TRTN
2142
PUT
DELISTED
Triton International Limited
TRTN
| $775K | ﹤0.01% |
233
+168
| +258% | +$5.92K |
|
2143
Star Bulk Carriers
SBLK
$3.14B
| $774K | ﹤0.01% |
53,607
+46,269
| +631% | +$599K |
|
2144
CALL
Sonos
SONO
$1.75B
| $774K | ﹤0.01% |
+483
| New | +$8.54K |
|
2145
CALL
Tower Semiconductor
TSEM
$26.4B
| $774K | ﹤0.01% |
356
-15
| -4% | -$321 |
|
|
EMBJ
2146
CALL
Embraer S.A. ADS
EMBJ
$11.6B
| $773K | ﹤0.01% |
395
+256
| +184% | +$5.18K |
|
2147
CALL
Sherwin-Williams
SHW
$78.3B
| $773K | ﹤0.01% |
51
| – | – |
|
|
AXE
2148
CALL
DELISTED
Anixter International Inc
AXE
| $773K | ﹤0.01% |
110
+107
| +3,567% | +$7.5K |
|
2149
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $771K | ﹤0.01% |
101
+38
| +60% | +$2.87K |
|
2150
CALL
Tetra Tech
TTEK
$8.23B
| $771K | ﹤0.01% |
565
+170
| +43% | +$2.25K |
|
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.