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 | |
|---|---|---|---|---|---|---|
176
PUT
CF Industries
CF
$18.9B
| $1.19M | 0.09% |
1,227
+13
| +1% | +$613 |
|
177
PUT
NOV
NOV
$7.25B
| $1.19M | 0.09% |
741
+81
| +12% | +$3.01K |
|
178
CALL
ProShares Ultra S&P500
SSO
$8.04B
| $1.18M | 0.09% |
14,952
-5,048
| -25% | -$40.2K |
|
179
PUT
ConocoPhillips
COP
$143B
| $1.16M | 0.09% |
4,201
+2,552
| +155% | +$133K |
|
180
CALL
Monster Beverage
MNST
$93.4B
| $1.16M | 0.09% |
1,464
+750
| +105% | +$18.1K |
|
181
CALL
SPDR Gold Trust
GLD
$132B
| $1.16M | 0.09% |
4,353
-2,349
| -35% | -$248K |
|
182
ProShares Ultra VIX Short-Term Futures ETF
UVXY
$233M
| – | – |
0
| – | – |
|
183
Plains All American Pipeline
PAA
$17.1B
| $1.15M | 0.09% |
+49,961
| New | +$1.35M |
|
184
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $1.15M | 0.09% |
8,696
-2,238
| -20% | -$32.5K |
|
|
SCTY
185
PUT
DELISTED
SolarCity Corporation
SCTY
| $1.15M | 0.09% |
2,847
+179
| +7% | +$6.95K |
|
|
X
186
DELISTED
US Steel
X
| $1.14M | 0.09% |
143,431
+115,575
| +415% | +$1.14M |
|
187
Northrop Grumman
NOC
$72.8B
| $1.14M | 0.09% |
6,043
+4,582
| +314% | +$840K |
|
188
Intuit
INTU
$79.3B
| $1.14M | 0.09% |
11,806
+11,038
| +1,437% | +$1.07M |
|
189
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $1.13M | 0.09% |
51,962
-13,446
| -21% | -$299K |
|
190
PUT
Goldman Sachs
GS
$320B
| $1.12M | 0.09% |
2,090
-1,956
| -48% | -$364K |
|
191
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $1.11M | 0.09% |
414
+4
| +1% | +$2.17K |
|
192
PUT
Western Digital
WDC
$189B
| $1.11M | 0.09% |
1,054
+316
| +43% | +$16.1K |
|
|
CTXS
193
DELISTED
Citrix Systems Inc
CTXS
| $1.1M | 0.09% |
18,313
-5,461
| -23% | -$335K |
|
194
Edwards Lifesciences
EW
$48.9B
| $1.1M | 0.09% |
41,835
+31,983
| +325% | +$831K |
|
195
CALL
Mastercard
MA
$476B
| $1.09M | 0.09% |
1,265
+3
| +0.2% | +$294 |
|
|
AGN
196
PUT
DELISTED
Allergan plc
AGN
| $1.09M | 0.09% |
1,625
+51
| +3% | +$15.2K |
|
197
PUT
Williams Companies
WMB
$89.7B
| $1.09M | 0.09% |
983
-3,229
| -77% | -$113K |
|
|
198
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $1.09M | 0.09% |
3,202
-3,977
| -55% | -$695K |
|
|
VXX
199
CALL
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $1.07M | 0.08% |
455
-672
| -60% | -$214K |
|
200
United Rentals
URI
$63.4B
| $1.06M | 0.08% |
14,646
+6,958
| +91% | +$503K |
|
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.