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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
76
CALL
American Airlines Group
AAL
$10.1B
| $3.83M | 0.23% |
6,638
+2,188
| +49% | +$95.3K |
|
77
PUT
Gilead Sciences
GILD
$162B
| $3.81M | 0.23% |
6,358
+296
| +5% | +$22K |
|
78
Starbucks
SBUX
$119B
| $3.79M | 0.23% |
68,241
-29,251
| -30% | -$1.62M |
|
79
CALL
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $3.75M | 0.22% |
43,972
+8,444
| +24% | +$205K |
|
80
CALL
AT&T
T
$155B
| $3.64M | 0.22% |
14,346
+10,774
| +302% | +$318K |
|
81
Bausch Health
BHC
$1.69B
| $3.62M | 0.22% |
249,435
+108,716
| +77% | +$1.99M |
|
82
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $3.61M | 0.22% |
+18,270
| New | +$3.44M |
|
|
COL
83
DELISTED
Rockwell Collins
COL
| $3.56M | 0.21% |
38,432
+35,182
| +1,083% | +$3.1M |
|
84
Crown Castle
CCI
$33.3B
| $3.53M | 0.21% |
+40,723
| New | +$3.57M |
|
85
lululemon athletica
LULU
$13.2B
| $3.53M | 0.21% |
54,262
+24,305
| +81% | +$1.45M |
|
86
Boston Scientific
BSX
$64.2B
| $3.46M | 0.21% |
+159,803
| New | +$3.49M |
|
87
CALL
Microsoft
MSFT
$2.95T
| $3.35M | 0.2% |
6,958
+1,236
| +22% | +$74.3K |
|
|
UCD
88
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $3.3M | 0.2% |
17,071
+1,096
| +7% | +$212K |
|
89
Northrop Grumman
NOC
$72.8B
| $3.25M | 0.19% |
+13,978
| New | +$3.25M |
|
|
PPLC
90
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $3.23M | 0.19% |
9,374
-453
| -5% | -$12.8K |
|
|
BHI
91
DELISTED
Baker Hughes
BHI
| $3.13M | 0.19% |
+48,178
| New | +$2.86M |
|
92
Illumina
ILMN
$29.1B
| $3.13M | 0.19% |
25,102
+20,812
| +485% | +$2.81M |
|
93
Trip.com Group
TCOM
$27.5B
| $3.11M | 0.19% |
77,694
+7,504
| +11% | +$328K |
|
|
94
AT&T
T
$155B
| $3.1M | 0.19% |
+96,542
| New | +$2.85M |
|
|
KANG
95
DELISTED
iKang Healthcare Group, Inc.
KANG
| $3.04M | 0.18% |
175,618
+118,625
| +208% | +$2.01M |
|
|
96
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $3.02M | 0.18% |
7,253
+2,844
| +65% | +$536K |
|
97
Salesforce
CRM
$139B
| $3.01M | 0.18% |
43,931
-19,401
| -31% | -$1.41M |
|
98
Union Pacific
UNP
$174B
| $3M | 0.18% |
+28,979
| New | +$2.85M |
|
|
WBA
99
DELISTED
Walgreens Boots Alliance
WBA
| $2.98M | 0.18% |
+36,024
| New | +$2.98M |
|
|
HES
100
DELISTED
Hess
HES
| $2.96M | 0.18% |
+47,579
| New | +$2.6M |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.