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 | |
|---|---|---|---|---|---|---|
|
KYNB
2201
Kyntra Bio
KYNB
$28.5M
| $733K | ﹤0.01% |
483
-355
| -42% | -$547K |
|
|
FISV
2202
PUT
Fiserv Inc
FISV
$27.2B
| $733K | ﹤0.01% |
89
-4
| -4% | -$314 |
|
2203
PUT
Equifax
EFX
$20.3B
| $731K | ﹤0.01% |
56
-258
| -82% | -$33.6K |
|
|
MNTA
2204
PUT
DELISTED
Momenta Pharmaceuticals, Inc.
MNTA
| $731K | ﹤0.01% |
278
+276
| +13,800% | +$7.46K |
|
2205
CALL
Fossil Group
FOSL
$239M
| $730K | ﹤0.01% |
314
-64
| -17% | -$1.61K |
|
2206
CALL
Prothena Corp
PRTA
$458M
| $729K | ﹤0.01% |
558
-364
| -39% | -$5.26K |
|
2207
Acadia Pharmaceuticals
ACAD
$4.25B
| $728K | ﹤0.01% |
35,073
+9,525
| +37% | +$150K |
|
2208
CALL
Appian
APPN
$1.74B
| $728K | ﹤0.01% |
+220
| New | +$7.51K |
|
2209
CALL
Ares Management
ARES
$28.5B
| $728K | ﹤0.01% |
314
+136
| +76% | +$2.92K |
|
|
TELL
2210
DELISTED
Tellurian Inc.
TELL
| $728K | ﹤0.01% |
+81,256
| New | +$670K |
|
2211
CALL
WEC Energy
WEC
$37.7B
| $727K | ﹤0.01% |
109
+28
| +35% | +$1.87K |
|
|
COUP
2212
PUT
DELISTED
Coupa Software Incorporated
COUP
| $727K | ﹤0.01% |
92
+76
| +475% | +$5.28K |
|
2213
PUT
Olin
OLN
$2.64B
| $726K | ﹤0.01% |
283
+220
| +349% | +$6.46K |
|
2214
CALL
Plains GP Holdings
PAGP
$5.23B
| $726K | ﹤0.01% |
296
+279
| +1,641% | +$6.91K |
|
2215
CALL
Affiliated Managers Group
AMG
$9.46B
| $724K | ﹤0.01% |
53
+19
| +56% | +$2.81K |
|
2216
PUT
CenterPoint Energy
CNP
$29.1B
| $724K | ﹤0.01% |
262
+47
| +22% | +$1.32K |
|
|
HSII
2217
PUT
DELISTED
Heidrick & Struggles
HSII
| $724K | ﹤0.01% |
214
+204
| +2,040% | +$7.94K |
|
2218
CALL
Okta
OKTA
$24.1B
| $724K | ﹤0.01% |
103
-558
| -84% | -$33.2K |
|
|
SPR
2219
DELISTED
Spirit AeroSystems
SPR
| $724K | ﹤0.01% |
+7,898
| New | +$694K |
|
|
KLXI
2220
DELISTED
KLX Inc.
KLXI
| $724K | ﹤0.01% |
11,547
+1,530
| +15% | +$94.3K |
|
2221
Owens Corning
OC
$11.5B
| $723K | ﹤0.01% |
13,325
+11,809
| +779% | +$711K |
|
2222
CALL
Pultegroup
PHM
$24.5B
| $723K | ﹤0.01% |
292
-417
| -59% | -$11.8K |
|
2223
CALL
Coca-Cola Europacific Partners
CCEP
$46.5B
| $722K | ﹤0.01% |
159
+76
| +92% | +$3.24K |
|
2224
PUT
Canadian Imperial Bank of Commerce
CM
$107B
| $722K | ﹤0.01% |
154
-36
| -19% | -$1.65K |
|
2225
PUT
Paylocity
PCTY
$6.71B
| $722K | ﹤0.01% |
90
+89
| +8,900% | +$6.3K |
|
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.