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 | |
|---|---|---|---|---|---|---|
151
PUT
Citigroup
C
$216B
| $1.45M | 0.11% |
3,931
-450
| -10% | -$23.9K |
|
|
FIT
152
PUT
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $1.45M | 0.11% |
3,017
+916
| +44% | +$30.3K |
|
153
Halliburton
HAL
$27.7B
| $1.44M | 0.11% |
42,210
+6,428
| +18% | +$242K |
|
154
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $1.42M | 0.11% |
18,928
-5,540
| -23% | -$123K |
|
155
Blackstone
BX
$151B
| $1.39M | 0.11% |
47,395
-11,287
| -19% | -$360K |
|
156
Yelp
YELP
$1.45B
| $1.38M | 0.11% |
48,080
+17,404
| +57% | +$457K |
|
157
Devon Energy
DVN
$50.9B
| $1.37M | 0.11% |
42,940
+34,378
| +402% | +$1.41M |
|
158
Brookdale Senior Living
BKD
$3.63B
| $1.35M | 0.11% |
+73,022
| New | +$1.57M |
|
159
PUT
ExxonMobil
XOM
$629B
| $1.34M | 0.1% |
4,219
+1,817
| +76% | +$145K |
|
160
United States Oil Fund
USO
$2.31B
| $1.33M | 0.1% |
15,169
-5,800
| -28% | -$618K |
|
161
Synchrony
SYF
$24.7B
| $1.33M | 0.1% |
43,836
+15,921
| +57% | +$499K |
|
|
TIF
162
DELISTED
Tiffany & Co.
TIF
| $1.33M | 0.1% |
+17,402
| New | +$1.36M |
|
|
XLNX
163
DELISTED
Xilinx Inc
XLNX
| $1.31M | 0.1% |
+27,974
| New | +$1.32M |
|
164
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $1.31M | 0.1% |
3,318
-2,848
| -46% | -$53.9K |
|
|
HOT
165
DELISTED
STARWOOD HOTELS & RESORTS WORLDWIDE, INC.
HOT
| $1.3M | 0.1% |
18,810
-15,334
| -45% | -$1.09M |
|
|
BBBY
166
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.29M | 0.1% |
+26,843
| New | +$1.49M |
|
167
PUT
Invesco QQQ Trust
QQQ
$471B
| $1.29M | 0.1% |
5,695
-11,138
| -66% | -$1.24M |
|
168
CALL
Gilead Sciences
GILD
$165B
| $1.28M | 0.1% |
2,361
-4,113
| -64% | -$428K |
|
169
PUT
Kinder Morgan
KMI
$72.5B
| $1.28M | 0.1% |
2,617
+1,106
| +73% | +$26.4K |
|
|
X
170
PUT
DELISTED
US Steel
X
| $1.25M | 0.1% |
2,400
+222
| +10% | +$2.18K |
|
171
PayPal
PYPL
$49.3B
| $1.22M | 0.1% |
33,678
-606
| -2% | -$21.4K |
|
172
Freeport-McMoran
FCX
$89.9B
| $1.21M | 0.09% |
178,951
+156,457
| +696% | +$1.49M |
|
173
PUT
American Airlines Group
AAL
$10.1B
| $1.21M | 0.09% |
2,597
-542
| -17% | -$23.5K |
|
174
F5
FFIV
$23.2B
| $1.21M | 0.09% |
12,453
-8,240
| -40% | -$891K |
|
175
Lockheed Martin
LMT
$117B
| $1.2M | 0.09% |
+5,508
| New | +$1.2M |
|
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.