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 | |
|---|---|---|---|---|---|---|
|
TWC
51
DELISTED
TIME WARNER CABLE INC NEW COM STK
TWC
| $3.97M | 0.31% |
+21,385
| New | +$3.97M |
|
52
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$16.4B
| $3.96M | 0.31% |
49,108
-14,896
| -23% | -$1.24M |
|
|
AGN
53
CALL
DELISTED
Allergan plc
AGN
| $3.91M | 0.31% |
1,695
+77
| +5% | +$22.9K |
|
|
TWTR
54
PUT
DELISTED
Twitter, Inc.
TWTR
| $3.78M | 0.3% |
5,864
+1,997
| +52% | +$53.3K |
|
|
55
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $3.78M | 0.3% |
21,726
-78,743
| -78% | -$13.8M |
|
56
CALL
Alibaba
BABA
$283B
| $3.76M | 0.29% |
9,361
-3,953
| -30% | -$310K |
|
57
Deere & Co
DE
$158B
| $3.67M | 0.29% |
+48,071
| New | +$3.72M |
|
58
TripAdvisor
TRIP
$1.61B
| $3.64M | 0.28% |
42,658
+40,707
| +2,086% | +$3.29M |
|
|
59
CALL
Apple
AAPL
$4.81T
| $3.59M | 0.28% |
47,328
-39,552
| -46% | -$1.13M |
|
60
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.42B
| $3.57M | 0.28% |
112,504
+58,400
| +108% | +$2M |
|
61
Signet Jewelers
SIG
$3.51B
| $3.56M | 0.28% |
28,811
+28,127
| +4,112% | +$3.81M |
|
|
GMCR
62
CALL
DELISTED
KEURIG GREEN MTN INC
GMCR
| $3.53M | 0.28% |
5,644
+3,280
| +139% | +$204K |
|
63
CALL
Booking.com
BKNG
$139B
| $3.49M | 0.27% |
20,575
-14,500
| -41% | -$766K |
|
|
64
PUT
Netflix
NFLX
$286B
| $3.21M | 0.25% |
120,690
-63,300
| -34% | -$723K |
|
65
PUT
SPDR Gold Trust
GLD
$132B
| $3.21M | 0.25% |
3,503
-765
| -18% | -$80.9K |
|
66
PUT
Tesla
TSLA
$1.42T
| $3.17M | 0.25% |
83,820
-14,025
| -14% | -$210K |
|
67
Baidu
BIDU
$36.8B
| $3.07M | 0.24% |
+16,219
| New | +$2.99M |
|
68
PUT
ProShares UltraShort Health Care
RXD
$3.35M
| $3.06M | 0.24% |
762
-58
| -7% | -$11.8K |
|
|
MJN
69
DELISTED
Mead Johnson Nutrition Company
MJN
| $3M | 0.24% |
38,041
+28,686
| +307% | +$2.26M |
|
70
VanEck Gold Miners ETF
GDX
$22.7B
| $2.99M | 0.23% |
218,081
+33,089
| +18% | +$481K |
|
71
CALL
Microsoft
MSFT
$2.95T
| $2.98M | 0.23% |
5,106
+2,985
| +141% | +$157K |
|
72
Phillips 66
PSX
$83.7B
| $2.97M | 0.23% |
+36,302
| New | +$3.13M |
|
73
AutoZone
AZO
$48.9B
| $2.93M | 0.23% |
3,948
+2,785
| +239% | +$2.13M |
|
74
ConocoPhillips
COP
$143B
| $2.92M | 0.23% |
62,472
+10,685
| +21% | +$558K |
|
|
PNRA
75
DELISTED
Panera Bread Co
PNRA
| $2.83M | 0.22% |
14,511
+3,502
| +32% | +$650K |
|
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.