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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
CVC
151
DELISTED
CABLEVISION SYS CP NY GRP CL-A
CVC
| $1.62M | 0.12% |
+49,887
| New | +$1.36M |
|
152
PUT
BP
BP
$110B
| $1.62M | 0.12% |
1,879
+753
| +67% | +$22.1K |
|
153
Monster Beverage
MNST
$93.4B
| $1.61M | 0.12% |
71,460
+61,884
| +646% | +$1.45M |
|
|
154
CALL
Walt Disney
DIS
$167B
| $1.6M | 0.12% |
4,541
+2,195
| +94% | +$239K |
|
155
Direxion Daily Small Cap Bull 3x ETF
TNA
$1.42B
| $1.6M | 0.12% |
54,104
+2,586
| +5% | +$99.5K |
|
|
OVTI
156
DELISTED
OMNIVISION TECHNOLOGIES INC
OVTI
| $1.6M | 0.12% |
60,793
+15,042
| +33% | +$374K |
|
157
Kimberly-Clark
KMB
$36B
| $1.59M | 0.12% |
14,578
+12,178
| +507% | +$1.34M |
|
158
PUT
JPMorgan Chase
JPM
$918B
| $1.59M | 0.12% |
3,400
+2,780
| +448% | +$182K |
|
159
PUT
Chevron
CVX
$381B
| $1.58M | 0.12% |
3,500
+2,313
| +195% | +$195K |
|
160
PUT
SLB Ltd
SLB
$69.7B
| $1.56M | 0.11% |
1,399
+226
| +19% | +$17.9K |
|
161
CALL
SPDR Gold Trust
GLD
$132B
| $1.55M | 0.11% |
6,702
+5,368
| +402% | +$578K |
|
162
ProShares Ultra Bloomberg Crude Oil
UCO
$425M
| $1.55M | 0.11% |
5,476
+674
| +14% | +$222K |
|
163
Kraft Heinz
KHC
$30.6B
| $1.55M | 0.11% |
+21,929
| New | +$1.66M |
|
164
iShares Russell 2000 Growth ETF
IWO
$14.9B
| $1.54M | 0.11% |
+11,481
| New | +$1.7M |
|
165
PUT
Halliburton
HAL
$27.7B
| $1.53M | 0.11% |
2,233
+1,574
| +239% | +$61.9K |
|
166
VanEck Semiconductor ETF
SMH
$70.3B
| $1.53M | 0.11% |
61,574
+7,542
| +14% | +$192K |
|
|
QIHU
167
PUT
DELISTED
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
| $1.52M | 0.11% |
980
-220
| -18% | -$12.4K |
|
168
State Street SPDR S&P Retail ETF
XRT
$372M
| $1.51M | 0.11% |
+34,103
| New | +$1.63M |
|
169
PUT
Citigroup
C
$223B
| $1.51M | 0.11% |
4,381
+2,513
| +135% | +$137K |
|
|
MDVN
170
DELISTED
MEDIVATION, INC.
MDVN
| $1.5M | 0.11% |
+35,331
| New | +$1.75M |
|
171
PUT
APA Corp
APA
$12.6B
| $1.5M | 0.11% |
1,423
+849
| +148% | +$38.6K |
|
172
Walmart Inc
WMT
$878B
| $1.48M | 0.11% |
68,271
-176,430
| -72% | -$4.05M |
|
173
PUT
ExxonMobil
XOM
$629B
| $1.47M | 0.11% |
2,402
+1,040
| +76% | +$80.1K |
|
174
Kinder Morgan
KMI
$72B
| $1.47M | 0.11% |
+53,068
| New | +$1.76M |
|
|
SLH
175
DELISTED
SOLERA HOLDINGS, INC. COM
SLH
| $1.45M | 0.11% |
+26,852
| New | +$1.22M |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.