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 | |
|---|---|---|---|---|---|---|
1026
CALL
LyondellBasell Industries
LYB
$19.9B
| $2.63M | 0.01% |
257
-229
| -47% | -$25K |
|
1027
CALL
Murphy USA
MUSA
$11.5B
| $2.63M | 0.01% |
308
-83
| -21% | -$6.85K |
|
|
P
1028
PUT
DELISTED
Pandora Media Inc
P
| $2.63M | 0.01% |
2,767
+2,483
| +874% | +$20.9K |
|
1029
PUT
Cardinal Health
CAH
$52.9B
| $2.63M | 0.01% |
487
-377
| -44% | -$19.3K |
|
1030
CALL
C.H. Robinson
CHRW
$24.2B
| $2.62M | 0.01% |
268
+97
| +57% | +$9.1K |
|
|
MDR
1031
CALL
DELISTED
McDermott International
MDR
| $2.62M | 0.01% |
1,422
+119
| +9% | +$2.23K |
|
|
GRMN
1032
PUT
Garmin
GRMN
$46.3B
| $2.62M | 0.01% |
374
+326
| +679% | +$21.4K |
|
1033
CALL
Etsy
ETSY
$7.68B
| $2.62M | 0.01% |
509
-254
| -33% | -$11.7K |
|
1034
PUT
Itaú Unibanco
ITUB
$92B
| $2.61M | 0.01% |
4,898
+2,744
| +127% | +$14.7K |
|
1035
PUT
Moody's
MCO
$82.5B
| $2.61M | 0.01% |
156
+58
| +59% | +$10.2K |
|
1036
PUT
SAP
SAP
$171B
| $2.61M | 0.01% |
212
+54
| +34% | +$6.41K |
|
1037
Nexstar Media Group
NXST
$5.53B
| $2.61M | 0.01% |
32,026
+14,751
| +85% | +$1.16M |
|
1038
CALL
Restaurant Brands International
QSR
$25.1B
| $2.6M | 0.01% |
439
+91
| +26% | +$5.54K |
|
|
ETP
1039
DELISTED
Energy Transfer Partners, L.P.
ETP
| $2.6M | 0.01% |
116,692
+105,314
| +926% | +$2.29M |
|
1040
PUT
Allstate
ALL
$65.5B
| $2.58M | 0.01% |
262
+240
| +1,091% | +$23.4K |
|
1041
PUT
Icon
ICLR
$13.1B
| $2.58M | 0.01% |
168
+157
| +1,427% | +$22.5K |
|
|
DISCK
1042
PUT
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $2.58M | 0.01% |
813
-36
| -4% | -$937 |
|
1043
PUT
Regency Centers
REG
$14.9B
| $2.58M | 0.01% |
399
-240
| -38% | -$15.3K |
|
|
RDS.B
1044
DELISTED
Royal Dutch Shell PLC ADS Class B
RDS.B
| $2.58M | 0.01% |
36,339
+35,072
| +2,768% | +$2.43M |
|
1045
CALL
Clorox
CLX
$11.3B
| $2.57M | 0.01% |
171
+60
| +54% | +$8.52K |
|
1046
PUT
First Trust Natural Gas ETF
FCG
$636M
| $2.57M | 0.01% |
178
-21
| -11% | -$477 |
|
1047
PUT
EPAM Systems
EPAM
$4.5B
| $2.56M | 0.01% |
186
-36
| -16% | -$4.85K |
|
|
GAP
1048
PUT
The Gap Inc
GAP
$6.8B
| $2.55M | 0.01% |
885
+91
| +11% | +$2.73K |
|
1049
CALL
International Paper
IP
$20.1B
| $2.55M | 0.01% |
548
-1,011
| -65% | -$50.1K |
|
1050
PUT
Norwegian Cruise Line
NCLH
$8.59B
| $2.54M | 0.01% |
443
+283
| +177% | +$14.7K |
|
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.