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 | |
|---|---|---|---|---|---|---|
|
YZC
2726
DELISTED
Yanzhou Coal Mining
YZC
| $20K | ﹤0.01% |
4,382
+2,990
| +215% | +$14.4K |
|
2727
Automatic Data Processing
ADP
$102B
| $19K | ﹤0.01% |
230
-936
| -80% | -$80.6K |
|
2728
PUT
Autodesk
ADSK
$47.7B
| $19K | ﹤0.01% |
99
-614
| -86% | -$35.7K |
|
2729
PUT
Aflac
AFL
$64.4B
| $19K | ﹤0.01% |
372
+72
| +24% | +$2.24K |
|
2730
ArcBest
ARCB
$3.31B
| $19K | ﹤0.01% |
900
+168
| +23% | +$4.15K |
|
2731
CALL
Brown-Forman Class B
BF.B
$12.6B
| $19K | ﹤0.01% |
409
+218
| +114% | +$7.27K |
|
2732
Cheesecake Factory
CAKE
$4.32B
| $19K | ﹤0.01% |
+423
| New | +$20.7K |
|
2733
Choice Hotels
CHH
$5.15B
| $19K | ﹤0.01% |
+390
| New | +$19.9K |
|
2734
Carriage Services
CSV
$635M
| $19K | ﹤0.01% |
809
+401
| +98% | +$9.35K |
|
2735
PUT
Dominion Energy
D
$61.8B
| $19K | ﹤0.01% |
75
+10
| +15% | +$691 |
|
2736
PUT
DaVita
DVA
$15.2B
| $19K | ﹤0.01% |
97
+78
| +411% | +$5.71K |
|
2737
Brinker International
EAT
$8.38B
| $19K | ﹤0.01% |
+411
| New | +$19.3K |
|
2738
PUT
Diamondback Energy
FANG
$55.1B
| $19K | ﹤0.01% |
56
+17
| +44% | +$1.26K |
|
|
GRMN
2739
CALL
Garmin
GRMN
$46.8B
| $19K | ﹤0.01% |
148
-19
| -11% | -$691 |
|
2740
PUT
Icahn Enterprises
IEP
$5.19B
| $19K | ﹤0.01% |
124
+121
| +4,033% | +$8.77K |
|
2741
CALL
Kayne Anderson Energy Infrastructure Fund
KYN
$2.44B
| $19K | ﹤0.01% |
+75
| New | +$1.49K |
|
2742
Standard BioTools
LAB
$303M
| $19K | ﹤0.01% |
1,781
-3,025
| -63% | -$29.7K |
|
|
LNW
2743
CALL
DELISTED
Light & Wonder
LNW
| $19K | ﹤0.01% |
421
+321
| +321% | +$3.09K |
|
2744
CALL
Macerich
MAC
$7.41B
| $19K | ﹤0.01% |
111
-152
| -58% | -$12.2K |
|
|
MAG
2745
DELISTED
MAG Silver
MAG
| $19K | ﹤0.01% |
+2,700
| New | +$19.4K |
|
|
MSB
2746
PUT
Mesabi Trust
MSB
$297M
| $19K | ﹤0.01% |
179
+134
| +298% | +$1.03K |
|
2747
CALL
Puma Biotechnology
PBYI
$407M
| $19K | ﹤0.01% |
57
-124
| -69% | -$9.73K |
|
2748
CALL
Sunrun
RUN
$2.38B
| $19K | ﹤0.01% |
+39
| New | +$355 |
|
2749
CALL
SAP
SAP
$200B
| $19K | ﹤0.01% |
34
-12
| -26% | -$922 |
|
|
SRDX
2750
PUT
DELISTED
Surmodics
SRDX
| $19K | ﹤0.01% |
20
-17
| -46% | -$361 |
|
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.