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 | |
|---|---|---|---|---|---|---|
76
PUT
VanEck Gold Miners ETF
GDX
$22.7B
| $4.74M | 0.21% |
19,185
-8,823
| -32% | -$201K |
|
77
Wells Fargo
WFC
$266B
| $4.68M | 0.2% |
84,393
-281,399
| -77% | -$15.1M |
|
78
Synchrony
SYF
$24.3B
| $4.67M | 0.2% |
156,537
+83,094
| +113% | +$2.46M |
|
79
Eli Lilly
LLY
$1.05T
| $4.65M | 0.2% |
+56,457
| New | +$4.61M |
|
80
Procter & Gamble
PG
$345B
| $4.63M | 0.2% |
+53,113
| New | +$4.68M |
|
81
JD.com
JD
$41.1B
| $4.6M | 0.2% |
117,189
+8,845
| +8% | +$334K |
|
82
Salesforce
CRM
$139B
| $4.59M | 0.2% |
53,057
+19,329
| +57% | +$1.68M |
|
|
83
Gilead Sciences
GILD
$162B
| $4.57M | 0.2% |
64,544
-414,502
| -87% | -$27.6M |
|
84
ExxonMobil
XOM
$629B
| $4.53M | 0.2% |
56,108
-29,286
| -34% | -$2.4M |
|
85
PepsiCo
PEP
$184B
| $4.5M | 0.2% |
38,946
-24,737
| -39% | -$2.84M |
|
86
Analog Devices
ADI
$186B
| $4.33M | 0.19% |
55,709
+54,152
| +3,478% | +$4.3M |
|
87
Yelp
YELP
$1.42B
| $4.27M | 0.19% |
142,351
+134,167
| +1,639% | +$4.19M |
|
|
88
PUT
Booking.com
BKNG
$139B
| $4.25M | 0.18% |
27,425
-6,525
| -19% | -$478K |
|
89
Chevron
CVX
$381B
| $4.24M | 0.18% |
40,647
-16,376
| -29% | -$1.73M |
|
90
PUT
IBM
IBM
$198B
| $4.22M | 0.18% |
8,596
-3,537
| -29% | -$533K |
|
91
Delta Air Lines
DAL
$55.7B
| $4M | 0.17% |
74,497
+74,297
| +37,149% | +$3.64M |
|
|
TWTR
92
DELISTED
Twitter, Inc.
TWTR
| $4M | 0.17% |
223,759
+30,300
| +16% | +$516K |
|
|
AABA
93
DELISTED
Altaba Inc
AABA
| $3.93M | 0.17% |
+72,203
| New | +$3.93M |
|
|
DISH
94
DELISTED
DISH Network Corp.
DISH
| $3.92M | 0.17% |
62,530
+39,610
| +173% | +$2.5M |
|
95
Intuitive Surgical
ISRG
$124B
| $3.92M | 0.17% |
+37,737
| New | +$3.63M |
|
96
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $3.87M | 0.17% |
50,914
+46,635
| +1,090% | +$3.42M |
|
|
UCD
97
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $3.84M | 0.17% |
14,882
+3,126
| +27% | +$807K |
|
98
CALL
Regeneron Pharmaceuticals
REGN
$70.8B
| $3.73M | 0.16% |
1,069
+194
| +22% | +$84.9K |
|
99
CALL
Microsoft
MSFT
$2.95T
| $3.69M | 0.16% |
10,180
+1,989
| +24% | +$137K |
|
|
ILG
100
DELISTED
ILG, Inc Common Stock
ILG
| $3.58M | 0.16% |
130,054
+87,958
| +209% | +$2.23M |
|
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.