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
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
201
PUT
Qualcomm
QCOM
$186B
| $1.91M | 0.08% |
4,212
+13
| +0.3% | +$688 |
|
202
CALL
Verizon
VZ
$186B
| $1.91M | 0.08% |
7,089
+2,960
| +72% | +$139K |
|
203
CALL
Biogen
BIIB
$29.8B
| $1.91M | 0.08% |
1,315
-228
| -15% | -$67.5K |
|
204
PUT
Applied Optoelectronics
AAOI
$9.07B
| $1.9M | 0.08% |
2,238
+277
| +14% | +$19.6K |
|
205
iShares MSCI Emerging Markets ETF
EEM
$28.8B
| $1.89M | 0.08% |
42,087
+41,887
| +20,944% | +$1.84M |
|
206
CALL
American International
AIG
$41.8B
| $1.88M | 0.08% |
2,668
+567
| +27% | +$35.3K |
|
207
CALL
Wynn Resorts
WYNN
$9.83B
| $1.88M | 0.08% |
1,643
-328
| -17% | -$44.7K |
|
208
CALL
Regeneron Pharmaceuticals
REGN
$70.5B
| $1.87M | 0.08% |
1,198
+129
| +12% | +$61.4K |
|
209
British American Tobacco
BTI
$135B
| $1.87M | 0.08% |
29,915
+13,906
| +87% | +$897K |
|
210
Molson Coors Class B
TAP
$7.75B
| $1.87M | 0.08% |
22,884
+4,392
| +24% | +$386K |
|
|
211
Regeneron Pharmaceuticals
REGN
$70.5B
| $1.86M | 0.08% |
4,173
-22,748
| -84% | -$10.8M |
|
212
iShares MSCI EAFE ETF
EFA
$77.3B
| $1.85M | 0.08% |
27,050
-6,684
| -20% | -$447K |
|
213
Advanced Energy
AEIS
$12.6B
| $1.84M | 0.08% |
22,825
-5,274
| -19% | -$382K |
|
214
Aflac
AFL
$63.3B
| $1.84M | 0.08% |
45,266
+5,616
| +14% | +$226K |
|
215
Estee Lauder
EL
$29.9B
| $1.81M | 0.07% |
+16,806
| New | +$1.72M |
|
|
ATVI
216
CALL
DELISTED
Activision Blizzard
ATVI
| $1.78M | 0.07% |
2,260
+435
| +24% | +$27.1K |
|
217
iShares 7-10 Year Treasury Bond ETF
IEF
$47.2B
| $1.78M | 0.07% |
+16,679
| New | +$1.79M |
|
218
CALL
JPMorgan Chase
JPM
$920B
| $1.77M | 0.07% |
4,706
-3,813
| -45% | -$352K |
|
219
EQT Corp
EQT
$33.5B
| $1.76M | 0.07% |
49,680
+35,311
| +246% | +$1.2M |
|
220
Nexstar Media Group
NXST
$5.5B
| $1.76M | 0.07% |
28,244
+4,358
| +18% | +$269K |
|
221
CALL
Caterpillar
CAT
$411B
| $1.76M | 0.07% |
2,290
-440
| -16% | -$50.7K |
|
222
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.84B
| $1.75M | 0.07% |
54,058
+47,248
| +694% | +$1.48M |
|
223
CALL
American Airlines Group
AAL
$9.94B
| $1.74M | 0.07% |
4,115
-1,563
| -28% | -$75.6K |
|
224
MACOM Technology Solutions
MTSI
$21.5B
| $1.74M | 0.07% |
38,968
+35,136
| +917% | +$1.71M |
|
225
CALL
Vertex Pharmaceuticals
VRTX
$121B
| $1.73M | 0.07% |
763
-75
| -9% | -$11.3K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.