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 | |
|---|---|---|---|---|---|---|
3701
PUT
Ashland
ASH
$3.39B
| $6K | ﹤0.01% |
106
+34
| +47% | +$1.79K |
|
|
ASRT
3702
CALL
DELISTED
Assertio
ASRT
| $6K | ﹤0.01% |
1
-4
| -80% | -$4.5K |
|
3703
PUT
AstraZeneca
AZN
$270B
| $6K | ﹤0.01% |
53
+37
| +231% | +$2.43K |
|
3704
CALL
Cameco
CCJ
$37.6B
| $6K | ﹤0.01% |
67
+34
| +103% | +$436 |
|
3705
Coeur Mining
CDE
$15.4B
| $6K | ﹤0.01% |
2,810
-835
| -23% | -$2.28K |
|
3706
CALL
CEVA Inc
CEVA
$878M
| $6K | ﹤0.01% |
+5
| New | +$119 |
|
3707
Carlyle Group
CG
$16.5B
| $6K | ﹤0.01% |
422
-3,600
| -90% | -$64.1K |
|
3708
PUT
Costamare
CMRE
$1.86B
| $6K | ﹤0.01% |
10
+1
| +11% | +$12 |
|
3709
PUT
CenterPoint Energy
CNP
$28.5B
| $6K | ﹤0.01% |
91
+53
| +139% | +$941 |
|
3710
CALL
Charles River Laboratories
CRL
$11.5B
| $6K | ﹤0.01% |
+38
| New | +$2.74K |
|
3711
CALL
Criteo
CRTO
$1.12B
| $6K | ﹤0.01% |
91
-19
| -17% | -$754 |
|
3712
CALL
CVB Financial
CVBF
$4.04B
| $6K | ﹤0.01% |
+127
| New | +$2.23K |
|
3713
PUT
eBay
EBAY
$51.7B
| $6K | ﹤0.01% |
44
-557
| -93% | -$15.4K |
|
3714
PUT
Equifax
EFX
$22.1B
| $6K | ﹤0.01% |
129
+119
| +1,190% | +$12.9K |
|
3715
VanEck JP Morgan EM Local Currency Bond ETF
EMLC
$4.78B
| $6K | ﹤0.01% |
+200
| New | +$7.05K |
|
3716
PUT
EPAM Systems
EPAM
$5.67B
| $6K | ﹤0.01% |
48
-89
| -65% | -$6.94K |
|
3717
CALL
Essex Property Trust
ESS
$19.1B
| $6K | ﹤0.01% |
4
-99
| -96% | -$22.7K |
|
3718
PUT
Exelon
EXC
$47.9B
| $6K | ﹤0.01% |
42
-25
| -37% | -$507 |
|
3719
PUT
Eagle Materials
EXP
$6.58B
| $6K | ﹤0.01% |
11
-7
| -39% | -$466 |
|
3720
PUT
National Beverage
FIZZ
$3.04B
| $6K | ﹤0.01% |
+58
| New | +$1.13K |
|
3721
Flotek Industries
FTK
$810M
| $6K | ﹤0.01% |
94
-399
| -81% | -$34.2K |
|
3722
PUT
Cedar Fair
FUN
$1.91B
| $6K | ﹤0.01% |
17
-1
| -6% | -$56 |
|
3723
Graco
GGG
$13.2B
| $6K | ﹤0.01% |
270
-3,909
| -94% | -$94.3K |
|
3724
Goldgroup Mining Inc.
GORO
$154M
| $6K | ﹤0.01% |
3,706
+3,288
| +787% | +$7.9K |
|
3725
CALL
Genuine Parts
GPC
$18B
| $6K | ﹤0.01% |
57
-132
| -70% | -$11.5K |
|
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.