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 | |
|---|---|---|---|---|---|---|
1101
PUT
Lennar Class B
LEN.B
$19.4B
| $2.39M | 0.01% |
552
-929
| -63% | -$37.6K |
|
1102
CALL
Transocean
RIG
$5.89B
| $2.38M | 0.01% |
1,709
+1,191
| +230% | +$14.8K |
|
1103
PUT
United Parks & Resorts
PRKS
$2.08B
| $2.38M | 0.01% |
757
+597
| +373% | +$15.6K |
|
|
SGMO
1104
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $2.38M | 0.01% |
1,403
+864
| +160% | +$13.1K |
|
1105
PUT
Ralph Lauren
RL
$22.1B
| $2.37M | 0.01% |
172
-260
| -60% | -$34.6K |
|
|
MRTX
1106
PUT
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $2.36M | 0.01% |
+501
| New | +$27.9K |
|
|
COHR
1107
PUT
DELISTED
Coherent Inc
COHR
| $2.36M | 0.01% |
137
+20
| +17% | +$3.52K |
|
1108
PUT
PNC Financial Services
PNC
$99.5B
| $2.36M | 0.01% |
173
-12
| -6% | -$1.71K |
|
|
WUBA
1109
PUT
DELISTED
58.com Inc
WUBA
| $2.35M | 0.01% |
320
+11
| +4% | +$761 |
|
1110
CALL
Teck Resources
TECK
$29.3B
| $2.35M | 0.01% |
977
+363
| +59% | +$8.73K |
|
|
ZAYO
1111
PUT
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $2.35M | 0.01% |
677
+120
| +22% | +$4.38K |
|
1112
Atlassian
TEAM
$20.3B
| $2.35M | 0.01% |
24,442
+12,385
| +103% | +$981K |
|
|
VIAB
1113
PUT
DELISTED
Viacom Inc. Class B
VIAB
| $2.35M | 0.01% |
695
-738
| -52% | -$22.1K |
|
|
JOYY
1114
CALL
JOYY Inc
JOYY
$3.66B
| $2.34M | 0.01% |
313
-193
| -38% | -$16.2K |
|
1115
Automatic Data Processing
ADP
$97.1B
| $2.34M | 0.01% |
+15,557
| New | +$2.2M |
|
|
FISV
1116
CALL
Fiserv Inc
FISV
$26.6B
| $2.34M | 0.01% |
284
+268
| +1,675% | +$21K |
|
1117
PUT
Williams-Sonoma
WSM
$25.7B
| $2.34M | 0.01% |
712
-70
| -9% | -$2.22K |
|
|
BLUE
1118
PUT
DELISTED
bluebird bio
BLUE
| $2.34M | 0.01% |
12
-20
| -63% | -$41.3K |
|
1119
PUT
Liberty Global Class C
LBTYK
$3.37B
| $2.33M | 0.01% |
809
+386
| +91% | +$10.4K |
|
1120
PUT
AeroVironment
AVAV
$8.03B
| $2.33M | 0.01% |
208
+177
| +571% | +$15.3K |
|
1121
SAP
SAP
$171B
| $2.33M | 0.01% |
18,966
+388
| +2% | +$46K |
|
1122
PUT
Chemours
CC
$2.63B
| $2.33M | 0.01% |
591
+368
| +165% | +$16.1K |
|
1123
Freeport-McMoran
FCX
$91.3B
| $2.33M | 0.01% |
167,131
+153,825
| +1,156% | +$2.32M |
|
1124
CALL
Icahn Enterprises
IEP
$5.18B
| $2.33M | 0.01% |
401
+377
| +1,571% | +$28K |
|
1125
CALL
PVH
PVH
$3.59B
| $2.32M | 0.01% |
161
-73
| -31% | -$10.8K |
|
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.