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 | |
|---|---|---|---|---|---|---|
2226
PUT
Travel + Leisure Co
TNL
$4.54B
| $722K | ﹤0.01% |
168
+108
| +180% | +$4.79K |
|
2227
United States Gasoline Fund
UGA
$142M
| $721K | ﹤0.01% |
19,960
+11,609
| +139% | +$394K |
|
|
CBPO
2228
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $720K | ﹤0.01% |
9,008
+3,831
| +74% | +$357K |
|
2229
PUT
Eaton
ETN
$157B
| $719K | ﹤0.01% |
83
-216
| -72% | -$17.7K |
|
|
CALY
2230
CALL
Callaway Golf Company
CALY
$3.26B
| $718K | ﹤0.01% |
296
+280
| +1,750% | +$6.02K |
|
2231
GrafTech
EAF
$194M
| $717K | ﹤0.01% |
+3,677
| New | +$693K |
|
2232
CALL
Huntington Ingalls Industries
HII
$11.3B
| $717K | ﹤0.01% |
28
+22
| +367% | +$5.26K |
|
2233
PUT
PDF Solutions
PDFS
$2.13B
| $717K | ﹤0.01% |
795
+771
| +3,213% | +$7.76K |
|
2234
CALL
Canadian Solar
CSIQ
$906M
| $716K | ﹤0.01% |
494
+365
| +283% | +$5.03K |
|
|
2235
CALL
Travel + Leisure Co
TNL
$4.54B
| $716K | ﹤0.01% |
168
+24
| +17% | +$1.06K |
|
|
SLCA
2236
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $716K | ﹤0.01% |
38,041
-13,554
| -26% | -$315K |
|
2237
PUT
Dine Brands
DIN
$432M
| $715K | ﹤0.01% |
88
-95
| -52% | -$7.37K |
|
|
AAWW
2238
PUT
DELISTED
Atlas Air Worldwide Holdings, Inc.
AAWW
| $714K | ﹤0.01% |
112
+58
| +107% | +$3.76K |
|
2239
Lear
LEA
$7.19B
| $713K | ﹤0.01% |
4,918
+3,319
| +208% | +$568K |
|
2240
CALL
GoPro
GPRO
$116M
| $712K | ﹤0.01% |
990
+701
| +243% | +$4.48K |
|
2241
PUT
PagSeguro Digital
PAGS
$2.57B
| $711K | ﹤0.01% |
257
-537
| -68% | -$14.6K |
|
2242
CALL
Flowserve
FLS
$9.25B
| $710K | ﹤0.01% |
130
-112
| -46% | -$5.42K |
|
|
ITCI
2243
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $710K | ﹤0.01% |
32,722
+7,135
| +28% | +$149K |
|
|
TSS
2244
PUT
DELISTED
Total System Services, Inc.
TSS
| $710K | ﹤0.01% |
72
+70
| +3,500% | +$6.58K |
|
2245
PUT
DMC Global
BOOM
$121M
| $709K | ﹤0.01% |
174
+160
| +1,143% | +$6.82K |
|
2246
CALL
Zimmer Biomet
ZBH
$17.7B
| $709K | ﹤0.01% |
56
+6
| +12% | +$713 |
|
2247
CALL
3D Systems Corp
DDD
$420M
| $708K | ﹤0.01% |
375
-831
| -69% | -$14.3K |
|
2248
CALL
HealthEquity
HQY
$7.91B
| $708K | ﹤0.01% |
75
-35
| -32% | -$3.02K |
|
2249
CALL
Arrow Electronics
ARW
$10.9B
| $707K | ﹤0.01% |
96
+78
| +433% | +$5.99K |
|
2250
CALL
FIVE9
FIVN
$1.77B
| $707K | ﹤0.01% |
162
-43
| -21% | -$1.77K |
|
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.