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 |
Amazon
AMZN
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
Hilton Worldwide
HLT
$73.6B
| $2.02M | 0.09% |
+32,679
| New | +$2.03M |
|
177
Packaging Corp of America
PKG
$20.3B
| $2.02M | 0.09% |
+18,127
| New | +$1.83M |
|
|
178
PUT
Qualcomm
QCOM
$183B
| $2.01M | 0.09% |
4,199
-1,869
| -31% | -$104K |
|
179
United Airlines
UAL
$38.2B
| $2M | 0.09% |
+26,652
| New | +$2.01M |
|
180
Marathon Petroleum
MPC
$92.1B
| $2M | 0.09% |
38,171
-8,888
| -19% | -$459K |
|
181
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $2M | 0.09% |
1,126
+123
| +12% | +$53.8K |
|
182
PayPal
PYPL
$49.3B
| $1.98M | 0.09% |
36,903
-3,046
| -8% | -$150K |
|
183
Acadia Pharmaceuticals
ACAD
$4.35B
| $1.97M | 0.09% |
70,683
+24,992
| +55% | +$745K |
|
184
Ford
F
$56.9B
| $1.96M | 0.09% |
175,482
+94,754
| +117% | +$1.06M |
|
185
lululemon athletica
LULU
$13.2B
| $1.95M | 0.08% |
32,695
-64,172
| -66% | -$3.34M |
|
186
American Airlines Group
AAL
$10.1B
| $1.94M | 0.08% |
38,638
-15,326
| -28% | -$712K |
|
187
PUT
Advanced Micro Devices
AMD
$888B
| $1.94M | 0.08% |
13,661
+3,793
| +38% | +$46.4K |
|
188
CALL
Johnson & Johnson
JNJ
$599B
| $1.92M | 0.08% |
4,111
+933
| +29% | +$119K |
|
|
AGN
189
PUT
DELISTED
Allergan plc
AGN
| $1.92M | 0.08% |
2,797
-40
| -1% | -$9.4K |
|
190
PUT
Baidu
BIDU
$36.8B
| $1.9M | 0.08% |
4,192
+2,131
| +103% | +$386K |
|
191
CALL
Bank of America
BAC
$430B
| $1.88M | 0.08% |
10,572
-1,477
| -12% | -$34.4K |
|
192
CALL
State Street SPDR NYSE Technology ETF
XNTK
$2.16B
| $1.87M | 0.08% |
14,217
-1,117
| -7% | -$80.4K |
|
193
CALL
Bausch Health
BHC
$1.75B
| $1.87M | 0.08% |
7,599
+4,180
| +122% | +$50.1K |
|
194
State Street Energy Select Sector SPDR ETF
XLE
$38.7B
| $1.86M | 0.08% |
57,264
-299,362
| -84% | -$10.1M |
|
195
CALL
Oracle
ORCL
$366B
| $1.85M | 0.08% |
5,561
+3,108
| +127% | +$142K |
|
|
196
Bausch Health
BHC
$1.75B
| $1.84M | 0.08% |
106,704
-211,195
| -66% | -$2.53M |
|
197
Lennar Class A
LEN
$20B
| $1.84M | 0.08% |
36,283
+2,443
| +7% | +$120K |
|
198
Thomson Reuters
TRI
$41.7B
| $1.83M | 0.08% |
34,013
+15,611
| +85% | +$800K |
|
199
Domino's
DPZ
$10.9B
| $1.82M | 0.08% |
+8,629
| New | +$1.7M |
|
200
Advanced Energy
AEIS
$12.2B
| $1.82M | 0.08% |
28,099
+18,363
| +189% | +$1.34M |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.