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 | |
|---|---|---|---|---|---|---|
|
WBA
76
DELISTED
Walgreens Boots Alliance
WBA
| $3.11M | 0.23% |
+37,433
| New | +$3.38M |
|
77
Qualcomm
QCOM
$183B
| $3.07M | 0.23% |
57,229
-8,026
| -12% | -$477K |
|
78
Electronic Arts
EA
$52.4B
| $3.04M | 0.22% |
+44,835
| New | +$3.14M |
|
|
AGN
79
PUT
DELISTED
Allergan plc
AGN
| $3.03M | 0.22% |
1,574
+855
| +119% | +$263K |
|
80
Micron Technology
MU
$1.1T
| $3.01M | 0.22% |
201,260
-234,994
| -54% | -$4.04M |
|
|
81
PUT
Walt Disney
DIS
$167B
| $2.99M | 0.22% |
6,918
+5,772
| +504% | +$629K |
|
82
AbbVie
ABBV
$448B
| $2.98M | 0.22% |
54,799
+27,448
| +100% | +$1.79M |
|
83
Teva Pharmaceuticals
TEVA
$36.5B
| $2.96M | 0.22% |
52,467
+25,244
| +93% | +$1.64M |
|
84
PUT
Goldman Sachs
GS
$320B
| $2.95M | 0.22% |
4,046
+1,714
| +73% | +$336K |
|
|
AET
85
DELISTED
Aetna Inc
AET
| $2.85M | 0.21% |
+26,029
| New | +$3.01M |
|
|
AGN
86
CALL
DELISTED
Allergan plc
AGN
| $2.77M | 0.2% |
1,618
+323
| +25% | +$99.2K |
|
|
APC
87
PUT
DELISTED
Anadarko Petroleum
APC
| $2.75M | 0.2% |
2,102
+1,317
| +168% | +$93.6K |
|
|
TWTR
88
PUT
DELISTED
Twitter, Inc.
TWTR
| $2.72M | 0.2% |
3,867
+659
| +21% | +$19.8K |
|
|
VXX
89
PUT
DELISTED
iPath S&P 500 VIX Short-Term Futures ETN due 1/30/2019
VXX
| $2.72M | 0.2% |
959
+668
| +230% | +$222K |
|
90
PUT
Williams Companies
WMB
$90.7B
| $2.59M | 0.19% |
4,212
+969
| +30% | +$48.3K |
|
91
Bristol-Myers Squibb
BMY
$124B
| $2.58M | 0.19% |
43,515
+37,376
| +609% | +$2.37M |
|
|
FIT
92
PUT
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $2.58M | 0.19% |
2,101
+1,986
| +1,727% | +$81.1K |
|
93
Nike
NKE
$63.7B
| $2.55M | 0.19% |
+41,514
| New | +$2.35M |
|
|
94
PUT
Qualcomm
QCOM
$183B
| $2.54M | 0.19% |
2,572
+1,518
| +144% | +$90.2K |
|
95
VanEck Gold Miners ETF
GDX
$22.7B
| $2.54M | 0.19% |
184,992
+13,800
| +8% | +$199K |
|
96
PUT
ProShares UltraShort Health Care
RXD
$3.35M
| $2.53M | 0.19% |
820
+441
| +116% | +$89K |
|
97
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $2.53M | 0.19% |
6,166
+4,113
| +200% | +$80.5K |
|
98
State Street Industrial Select Sector SPDR ETF
XLI
$33.1B
| $2.5M | 0.18% |
+50,229
| New | +$2.64M |
|
99
ConocoPhillips
COP
$143B
| $2.48M | 0.18% |
+51,787
| New | +$2.63M |
|
100
PUT
FedEx
FDX
$73.1B
| $2.48M | 0.18% |
1,400
+481
| +52% | +$76.8K |
|
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.