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 | |
|---|---|---|---|---|---|---|
4251
Nu Skin
NUS
$257M
| $119K | ﹤0.01% |
+1,454
| New | +$116K |
|
4252
CALL
Syndax Pharmaceuticals
SNDX
$1.7B
| $119K | ﹤0.01% |
+148
| New | +$1.05K |
|
4253
Stratasys
SSYS
$666M
| $119K | ﹤0.01% |
5,153
-28,646
| -85% | -$645K |
|
4254
Toyota
TM
$228B
| $119K | ﹤0.01% |
961
-1,972
| -67% | -$249K |
|
4255
CALL
Toro Company
TTC
$8.79B
| $119K | ﹤0.01% |
20
+16
| +400% | +$973 |
|
4256
Hilton Grand Vacations
HGV
$4.04B
| $118K | ﹤0.01% |
3,594
-8,369
| -70% | -$279K |
|
4257
CALL
Jefferies Financial Group
JEF
$12.7B
| $118K | ﹤0.01% |
60
-77
| -56% | -$1.6K |
|
4258
State Street SPDR S&P Bank ETF
KBE
$1.64B
| $118K | ﹤0.01% |
+2,535
| New | +$124K |
|
4259
Lands' End
LE
$378M
| $118K | ﹤0.01% |
6,773
+3,773
| +126% | +$88.8K |
|
4260
PUT
Plug Power
PLUG
$2.65B
| $118K | ﹤0.01% |
617
+427
| +225% | +$831 |
|
4261
CALL
Schwab US Broad Market ETF
SCHB
$42.3B
| $118K | ﹤0.01% |
126
-456
| -78% | -$5.26K |
|
4262
Vistra
VST
$48.2B
| $118K | ﹤0.01% |
+4,765
| New | +$110K |
|
4263
Dentsply Sirona
XRAY
$2.84B
| $118K | ﹤0.01% |
+3,139
| New | +$131K |
|
|
SYKE
4264
PUT
DELISTED
SYKES Enterprises Inc
SYKE
| $118K | ﹤0.01% |
39
-102
| -72% | -$3.04K |
|
|
CBLK
4265
CALL
DELISTED
Carbon Black, Inc. Common Stock
CBLK
| $118K | ﹤0.01% |
+56
| New | +$1.31K |
|
|
WFT
4266
CALL
DELISTED
Weatherford International plc
WFT
| $118K | ﹤0.01% |
438
-26
| -6% | -$76 |
|
4267
ATI
ATI
$24.3B
| $117K | ﹤0.01% |
3,976
+3,071
| +339% | +$82.6K |
|
4268
Coherus Oncology
CHRS
$217M
| $117K | ﹤0.01% |
7,098
-6,403
| -47% | -$114K |
|
4269
Covenant Logistics
CVLG
$1.04B
| $117K | ﹤0.01% |
8,108
-6,708
| -45% | -$101K |
|
4270
El Pollo Loco
LOCO
$503M
| $117K | ﹤0.01% |
9,402
-7,632
| -45% | -$93K |
|
4271
CALL
Sturm, Ruger & Co
RGR
$603M
| $117K | ﹤0.01% |
17
+2
| +13% | +$121 |
|
|
SNBR
4272
CALL
DELISTED
Sleep Number
SNBR
| $117K | ﹤0.01% |
32
+27
| +540% | +$876 |
|
4273
STAAR Surgical
STAA
$1.19B
| $117K | ﹤0.01% |
+2,451
| New | +$100K |
|
4274
PUT
Townsquare Media
TSQ
$105M
| $117K | ﹤0.01% |
+150
| New | +$1.18K |
|
4275
PUT
Wolverine World Wide
WWW
$1.68B
| $117K | ﹤0.01% |
30
+29
| +2,900% | +$1.08K |
|
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.