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 | |
|---|---|---|---|---|---|---|
|
ATVI
726
DELISTED
Activision Blizzard
ATVI
| $256K | 0.02% |
+6,615
| New | +$238K |
|
727
CALL
Canadian Solar
CSIQ
$907M
| $255K | 0.02% |
489
+108
| +28% | +$2.49K |
|
728
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $255K | 0.02% |
+2,656
| New | +$259K |
|
729
Motorola Solutions
MSI
$68.8B
| $255K | 0.02% |
3,736
-2,643
| -41% | -$184K |
|
730
ProShares UltraShort Bloomberg Crude Oil
SCO
$586M
| $255K | 0.02% |
48
-58
| -55% | -$234K |
|
|
BDSI
731
DELISTED
BioDelivery Sciences International, Inc.
BDSI
| $255K | 0.02% |
53,238
-41,892
| -44% | -$237K |
|
|
ESPR
732
DELISTED
Esperion Therapeutics
ESPR
| $254K | 0.02% |
+11,412
| New | +$288K |
|
733
Open Text
OTEX
$5.44B
| $254K | 0.02% |
10,618
-2,708
| -20% | -$63.8K |
|
|
DST
734
DELISTED
DST Systems Inc.
DST
| $253K | 0.02% |
+4,446
| New | +$261K |
|
|
AFAM
735
DELISTED
Almost Family Inc
AFAM
| $253K | 0.02% |
6,634
+3,756
| +131% | +$152K |
|
736
PUT
MetLife
MET
$60.6B
| $252K | 0.02% |
1,482
+356
| +32% | +$15.7K |
|
737
PUT
United States Natural Gas Fund
UNG
$470M
| $252K | 0.02% |
55
+5
| +10% | +$755 |
|
738
Jefferies Financial Group
JEF
$12.9B
| $250K | 0.02% |
16,075
+11,548
| +255% | +$193K |
|
739
Starbucks
SBUX
$118B
| $250K | 0.02% |
4,165
-64,734
| -94% | -$3.94M |
|
740
Essential Utilities
WTRG
$11.2B
| $250K | 0.02% |
8,410
+7,272
| +639% | +$209K |
|
741
CALL
Altria Group
MO
$122B
| $249K | 0.02% |
2,188
+1,280
| +141% | +$74.2K |
|
742
Toyota
TM
$210B
| $249K | 0.02% |
2,030
-2,279
| -53% | -$282K |
|
743
State Street SPDR S&P Retail ETF
XRT
$366M
| $249K | 0.02% |
5,771
-28,332
| -83% | -$1.27M |
|
|
CAM
744
DELISTED
CAMERON INTERNATIONAL CORPORATION
CAM
| $249K | 0.02% |
3,945
+245
| +7% | +$16.2K |
|
745
Rockwell Automation
ROK
$51.2B
| $248K | 0.02% |
2,421
-580
| -19% | -$60.8K |
|
746
PUT
AB InBev
BUD
$158B
| $247K | 0.02% |
1,018
+376
| +59% | +$45.5K |
|
747
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $247K | 0.02% |
3,066
-1,675
| -35% | -$134K |
|
748
PUT
Valero Energy
VLO
$90.3B
| $247K | 0.02% |
889
-1,856
| -68% | -$126K |
|
749
CALL
General Mills
GIS
$19.3B
| $246K | 0.02% |
773
+573
| +287% | +$33K |
|
750
Idexx Laboratories
IDXX
$43.1B
| $246K | 0.02% |
3,377
-991
| -23% | -$70.7K |
|
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.