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 | |
|---|---|---|---|---|---|---|
4151
CALL
ADT
ADT
$5.43B
| $129K | ﹤0.01% |
138
-322
| -70% | -$2.87K |
|
|
VISN
4152
Vistance Networks Inc
VISN
$2.64B
| $129K | ﹤0.01% |
4,218
+965
| +30% | +$29.6K |
|
4153
Delek Logistics
DKL
$3.13B
| $129K | ﹤0.01% |
+3,797
| New | +$117K |
|
4154
CALL
GATX Corp
GATX
$6.45B
| $129K | ﹤0.01% |
15
-21
| -58% | -$1.74K |
|
4155
Helen of Troy
HELE
$652M
| $129K | ﹤0.01% |
+990
| New | +$117K |
|
|
MAG
4156
DELISTED
MAG Silver
MAG
| $129K | ﹤0.01% |
16,014
+8,408
| +111% | +$73K |
|
4157
PUT
Merit Medical Systems
MMSI
$4.8B
| $129K | ﹤0.01% |
21
-119
| -85% | -$6.84K |
|
4158
Direxion Daily Technology Bear 3x ETF
TECS
$78.8M
| $129K | ﹤0.01% |
+1
| New | +$201K |
|
4159
Viavi Solutions
VIAV
$8.1B
| $129K | ﹤0.01% |
+11,378
| New | +$123K |
|
|
AIFU
4160
PUT
AIFU Inc
AIFU
$193M
| – | – |
0
| – | – |
|
4161
PUT
Vaalco Energy
EGY
$561M
| $128K | ﹤0.01% |
+470
| New | +$1.24K |
|
4162
CALL
Flotek Industries
FTK
$806M
| $128K | ﹤0.01% |
89
+85
| +2,125% | +$1.32K |
|
4163
Standard BioTools
LAB
$354M
| $128K | ﹤0.01% |
+17,096
| New | +$122K |
|
|
PPL
4164
PUT
PPL Corp
PPL
$27B
| $128K | ﹤0.01% |
44
-21
| -32% | -$614 |
|
4165
CALL
Wolverine World Wide
WWW
$1.69B
| $128K | ﹤0.01% |
33
-29
| -47% | -$1.08K |
|
|
ONIT
4166
PUT
Onity Group
ONIT
$347M
| $128K | ﹤0.01% |
22
+17
| +340% | +$1.05K |
|
|
ITCI
4167
PUT
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $128K | ﹤0.01% |
59
-489
| -89% | -$10.2K |
|
|
ZNGA
4168
DELISTED
ZYNGA INC. CL A COMMON
ZNGA
| $128K | ﹤0.01% |
31,945
+17,221
| +117% | +$69.3K |
|
4169
CALL
Ericsson
ERIC
$32.4B
| $127K | ﹤0.01% |
145
-626
| -81% | -$5.13K |
|
4170
PUT
MarineMax
HZO
$754M
| $127K | ﹤0.01% |
60
+5
| +9% | +$104 |
|
4171
PUT
NRG Energy
NRG
$26.7B
| $127K | ﹤0.01% |
34
+11
| +48% | +$369 |
|
|
VRS
4172
CALL
DELISTED
Verso Corporation
VRS
| $127K | ﹤0.01% |
38
+16
| +73% | +$418 |
|
4173
CALL
Healthpeak Properties
DOC
$15.6B
| $126K | ﹤0.01% |
48
+20
| +71% | +$526 |
|
4174
CALL
East-West Bancorp
EWBC
$18B
| $126K | ﹤0.01% |
21
+12
| +133% | +$771 |
|
4175
CALL
Haemonetics
HAE
$3.88B
| $126K | ﹤0.01% |
11
+2
| +22% | +$207 |
|
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.