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 |
Apple
AAPL
|
+$34.8M |
| 2 |
Bausch Health
BHC
|
+$20.3M |
| 3 |
Chipotle Mexican Grill
CMG
|
+$18.9M |
| 4 |
GMCR
KEURIG GREEN MTN INC
GMCR
|
+$12.3M |
| 5 |
Amazon
AMZN
|
+$12.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares Russell 2000 ETF
IWM
|
+$27.5M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.8M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$12.1M |
| 4 |
Netflix
NFLX
|
+$10.7M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$10.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 9.5% |
| 2 | Healthcare | 7.55% |
| 3 | Technology | 7.01% |
| 4 | Communication Services | 6.66% |
| 5 | Industrials | 5.76% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
Oracle
ORCL
$366B
| $1.65M | 0.13% |
45,284
+13,167
| +41% | +$503K |
|
127
PUT
Booking.com
BKNG
$139B
| $1.65M | 0.13% |
43,975
-1,475
| -3% | -$77.9K |
|
|
ESRX
128
DELISTED
Express Scripts Holding Company
ESRX
| $1.65M | 0.13% |
18,823
+17,192
| +1,054% | +$1.47M |
|
129
CALL
Berkshire Hathaway Class B
BRK.B
$1.06T
| $1.64M | 0.13% |
2,941
+987
| +51% | +$132K |
|
130
CALL
Invesco QQQ Trust
QQQ
$471B
| $1.64M | 0.13% |
3,389
-7,363
| -68% | -$821K |
|
131
Tesla
TSLA
$1.42T
| $1.63M | 0.13% |
+102,030
| New | +$1.53M |
|
132
CALL
UnitedHealth
UNH
$396B
| $1.6M | 0.13% |
753
-528
| -41% | -$61.7K |
|
133
CALL
McDonald's
MCD
$188B
| $1.59M | 0.12% |
1,676
-1,132
| -40% | -$127K |
|
134
Cummins
CMI
$91.1B
| $1.57M | 0.12% |
17,854
+15,166
| +564% | +$1.51M |
|
|
LNKD
135
CALL
DELISTED
LinkedIn Corporation
LNKD
| $1.57M | 0.12% |
1,107
-641
| -37% | -$145K |
|
136
PUT
SLB Ltd
SLB
$69.7B
| $1.55M | 0.12% |
1,587
+188
| +13% | +$14.1K |
|
|
137
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $1.54M | 0.12% |
3,355
-1,706
| -34% | -$298K |
|
138
CALL
Nike
NKE
$63.7B
| $1.54M | 0.12% |
2,567
-1,049
| -29% | -$67.7K |
|
139
IBM
IBM
$198B
| $1.54M | 0.12% |
+11,693
| New | +$1.57M |
|
140
CALL
Visa
V
$677B
| $1.53M | 0.12% |
1,629
-1,083
| -40% | -$83.9K |
|
141
Morgan Stanley
MS
$340B
| $1.52M | 0.12% |
+47,788
| New | +$1.59M |
|
|
142
PUT
IBM
IBM
$198B
| $1.51M | 0.12% |
2,305
+228
| +11% | +$30.6K |
|
|
EZCH
143
DELISTED
EZCHIP SEMICONDUCTOR LIMITED ORD SHS (IL)
EZCH
| $1.5M | 0.12% |
+60,682
| New | +$1.49M |
|
144
ProShares UltraPro QQQ
TQQQ
$34.7B
| $1.49M | 0.12% |
625,200
+70,752
| +13% | +$168K |
|
145
Ulta Beauty
ULTA
$21B
| $1.48M | 0.12% |
8,015
+1,863
| +30% | +$322K |
|
146
PUT
Halliburton
HAL
$27.7B
| $1.48M | 0.12% |
1,764
-469
| -21% | -$17.7K |
|
147
Herbalife
HLF
$1.27B
| $1.47M | 0.12% |
54,984
+47,286
| +614% | +$1.31M |
|
|
148
Netflix
NFLX
$286B
| $1.47M | 0.12% |
128,670
-936,940
| -88% | -$10.7M |
|
|
P
149
DELISTED
Pandora Media Inc
P
| $1.46M | 0.11% |
109,195
+78,789
| +259% | +$1.17M |
|
150
Energy Transfer Partners
ET
$69.7B
| $1.46M | 0.11% |
+106,430
| New | +$1.99M |
|
Similar funds
Simplex Trading's Q4 2015 Portfolio in Review
As of Q4 2015, Simplex Trading held 7,008 positions worth $1.28B, down 6.4% from $1.36B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading's Q4 2015 filing shows 1,417 new, 1,993 increased, 1,803 reduced and 1,598 closed positions. Its largest new stake was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M. The largest sale was iShares Russell 2000 ETF, an estimated $27.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 9.5% of assets, up from 4.6% a quarter earlier, followed by Healthcare and Technology.
- Simplex Trading's largest Q4 2015 buy was Chipotle Mexican Grill: 1,548,150 shares worth $14.9M.
- Simplex Trading added most to Apple in Q4 2015, an estimated $34.8M increase.
- Simplex Trading's biggest Q4 2015 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $13.8M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q4 2015, selling an estimated $27.5M.
- Simplex Trading's ten largest holdings make up 19% of its $1.28B portfolio in Q4 2015.
- Simplex Trading opened 1,417 new positions and closed 1,598 in Q4 2015.
- Simplex Trading's portfolio value fell 6.4% quarter-over-quarter to $1.28B.
Based on Simplex Trading's 13F filing for Q4 2015, filed 20 Jan 2016.