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 | |
|---|---|---|---|---|---|---|
2926
PUT
Barnes & Noble Education
BNED
$445M
| – | – |
0
| – | – |
|
2927
CALL
British American Tobacco
BTI
$131B
| $15K | ﹤0.01% |
144
+94
| +188% | +$5.39K |
|
2928
CALL
Chemours
CC
$2.55B
| $15K | ﹤0.01% |
+215
| New | +$1.37K |
|
|
2929
PUT
Chemours
CC
$2.55B
| $15K | ﹤0.01% |
50
+29
| +138% | +$185 |
|
2930
Clean Energy Fuels
CLNE
$432M
| $15K | ﹤0.01% |
+4,196
| New | +$20.1K |
|
2931
PUT
Coty
COTY
$2.39B
| $15K | ﹤0.01% |
114
+31
| +37% | +$862 |
|
2932
PUT
Cognizant
CTSH
$22.3B
| $15K | ﹤0.01% |
110
+47
| +75% | +$3.03K |
|
2933
Ericsson
ERIC
$31.8B
| $15K | ﹤0.01% |
1,566
+984
| +169% | +$9.58K |
|
2934
CALL
Exelon
EXC
$48.2B
| $15K | ﹤0.01% |
614
+146
| +31% | +$2.96K |
|
2935
CALL
First Horizon
FHN
$12.1B
| $15K | ﹤0.01% |
493
+138
| +39% | +$2K |
|
2936
Fomento Económico Mexicano
FMX
$45B
| $15K | ﹤0.01% |
172
-40
| -19% | -$3.84K |
|
2937
Geron
GERN
$949M
| $15K | ﹤0.01% |
3,184
-10,147
| -76% | -$40.7K |
|
2938
Global Payments
GPN
$23B
| $15K | ﹤0.01% |
+237
| New | +$16K |
|
2939
PUT
Groupon
GRPN
$1.05B
| $15K | ﹤0.01% |
5
-4
| -44% | -$257 |
|
2940
CALL
Hasbro
HAS
$12.8B
| $15K | ﹤0.01% |
296
+2
| +0.7% | +$146 |
|
2941
CALL
H&R Block
HRB
$5.37B
| $15K | ﹤0.01% |
605
-1,303
| -68% | -$46.3K |
|
2942
Installed Building Products
IBP
$6.16B
| $15K | ﹤0.01% |
+618
| New | +$15K |
|
|
IMOS
2943
CALL
ChipMOS TECHNOLOGIES
IMOS
$1.91B
| $15K | ﹤0.01% |
61
-32
| -34% | -$651 |
|
2944
iShares Micro-Cap ETF
IWC
$1.45B
| $15K | ﹤0.01% |
220
+46
| +26% | +$3.39K |
|
2945
PUT
Jacobs Solutions
J
$16B
| $15K | ﹤0.01% |
207
-3
| -1% | -$103 |
|
|
JWN
2946
CALL
DELISTED
Nordstrom
JWN
| $15K | ﹤0.01% |
513
+300
| +141% | +$18.2K |
|
2947
PUT
Kroger
KR
$35.5B
| $15K | ﹤0.01% |
252
-546
| -68% | -$21.2K |
|
2948
Liberty Global Class C
LBTYK
$3.27B
| $15K | ﹤0.01% |
+424
| New | +$15.3K |
|
|
LITB
2949
PUT
LightInTheBox
LITB
$56M
| $15K | ﹤0.01% |
12
-43
| -78% | -$817 |
|
2950
PUT
Match Group
MTCH
$9.05B
| $15K | ﹤0.01% |
+39
| New | +$546 |
|
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.