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 | |
|---|---|---|---|---|---|---|
2826
PUT
Ciena
CIEN
$53.4B
| $17K | ﹤0.01% |
80
-131
| -62% | -$3.01K |
|
2827
Caesarstone
CSTE
$75.7M
| $17K | ﹤0.01% |
406
-10,558
| -96% | -$402K |
|
2828
CALL
Diageo
DEO
$47.3B
| $17K | ﹤0.01% |
451
+120
| +36% | +$13.5K |
|
2829
PUT
Dollar Tree
DLTR
$24.1B
| $17K | ﹤0.01% |
319
-107
| -25% | -$7.48K |
|
2830
CALL
Euronet Worldwide
EEFT
$3.01B
| $17K | ﹤0.01% |
69
-198
| -74% | -$15.1K |
|
2831
PUT
Enphase Energy
ENPH
$5.01B
| $17K | ﹤0.01% |
41
+14
| +52% | +$44 |
|
2832
Franklin Electric
FELE
$4.66B
| $17K | ﹤0.01% |
630
-2,037
| -76% | -$61.5K |
|
|
JKS
2833
PUT
JinkoSolar
JKS
$799M
| $17K | ﹤0.01% |
102
+38
| +59% | +$974 |
|
2834
ManpowerGroup
MAN
$2.5B
| $17K | ﹤0.01% |
207
-6
| -3% | -$524 |
|
2835
CALL
Mercado Libre
MELI
$92.3B
| $17K | ﹤0.01% |
45
-52
| -54% | -$5.72K |
|
2836
PUT
MACOM Technology Solutions
MTSI
$20.1B
| $17K | ﹤0.01% |
13
| – | – |
|
2837
PUT
Nabors Industries
NBR
$1.16B
| $17K | ﹤0.01% |
9
+8
| +800% | +$3.93K |
|
2838
ALPS O'Shares U.S. Quality Dividend ETF
OUSA
$742M
| $17K | ﹤0.01% |
700
+10
| +1% | +$250 |
|
2839
CALL
PACCAR
PCAR
$70.2B
| $17K | ﹤0.01% |
179
+95
| +113% | +$3.24K |
|
2840
CALL
Public Storage
PSA
$60.5B
| $17K | ﹤0.01% |
17
+6
| +55% | +$1.41K |
|
|
BCIC
2841
BCP Investment Corp
BCIC
$88.1M
| $17K | ﹤0.01% |
+420
| New | +$19.4K |
|
2842
PUT
Regions Financial
RF
$26.2B
| $17K | ﹤0.01% |
202
+99
| +96% | +$950 |
|
2843
PUT
Ryanair
RYAAY
$29.8B
| $17K | ﹤0.01% |
178
+171
| +2,443% | +$5.58K |
|
2844
SPX Corp
SPXC
$11B
| $17K | ﹤0.01% |
1,853
-3,696
| -67% | -$40.2K |
|
2845
TE Connectivity
TEL
$60.2B
| $17K | ﹤0.01% |
+269
| New | +$17.3K |
|
2846
CALL
Travel + Leisure Co
TNL
$4.68B
| $17K | ﹤0.01% |
97
-175
| -64% | -$6.04K |
|
|
TRUE
2847
CALL
DELISTED
TrueCar
TRUE
| $17K | ﹤0.01% |
88
+35
| +66% | +$258 |
|
2848
PUT
CVR Partners
UAN
$1.27B
| $17K | ﹤0.01% |
6
+5
| +500% | +$444 |
|
2849
CALL
Visteon
VC
$2.82B
| $17K | ﹤0.01% |
12
-23
| -66% | -$2.6K |
|
2850
PUT
Wayfair
W
$12.5B
| $17K | ﹤0.01% |
70
-484
| -87% | -$20.5K |
|
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.