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 | |
|---|---|---|---|---|---|---|
101
ProShares UltraPro S&P 500
UPRO
$5.31B
| $2.94M | 0.18% |
216,060
+124,440
| +136% | +$1.57M |
|
102
Baidu
BIDU
$36.8B
| $2.87M | 0.17% |
+17,427
| New | +$2.97M |
|
103
Banc of California
BANC
$3.37B
| $2.83M | 0.17% |
+162,983
| New | +$2.5M |
|
104
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$22.5B
| $2.81M | 0.17% |
69,096
+49,260
| +248% | +$1.99M |
|
|
AET
105
DELISTED
Aetna Inc
AET
| $2.81M | 0.17% |
22,673
+13,345
| +143% | +$1.6M |
|
106
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $2.74M | 0.16% |
26,835
+4,677
| +21% | +$104K |
|
107
Teva Pharmaceuticals
TEVA
$36.5B
| $2.7M | 0.16% |
74,561
-58,392
| -44% | -$2.33M |
|
108
CALL
Alibaba
BABA
$283B
| $2.67M | 0.16% |
10,140
-3,009
| -23% | -$290K |
|
109
CALL
Micron Technology
MU
$1.1T
| $2.63M | 0.16% |
5,443
-1,010
| -16% | -$19K |
|
110
NextEra Energy
NEE
$183B
| $2.62M | 0.16% |
87,772
+35,948
| +69% | +$1.07M |
|
111
iShares US Real Estate ETF
IYR
$4.53B
| $2.6M | 0.16% |
+33,870
| New | +$2.57M |
|
112
CALL
Intel
INTC
$530B
| $2.6M | 0.16% |
6,898
+3,052
| +79% | +$109K |
|
113
NVIDIA
NVDA
$5.02T
| $2.59M | 0.15% |
969,960
-1,780,360
| -65% | -$3.72M |
|
114
Regeneron Pharmaceuticals
REGN
$70.8B
| $2.58M | 0.15% |
7,033
+3,152
| +81% | +$1.2M |
|
115
PUT
Invesco QQQ Trust
QQQ
$471B
| $2.57M | 0.15% |
14,352
-1,866
| -12% | -$220K |
|
116
CALL
Charter Communications
CHTR
$15.7B
| $2.56M | 0.15% |
897
+297
| +50% | +$80K |
|
117
State Street Financial Select Sector SPDR ETF
XLF
$55.4B
| $2.56M | 0.15% |
109,981
-10,968
| -9% | -$235K |
|
|
CHL
118
DELISTED
China Mobile Limited
CHL
| $2.52M | 0.15% |
+48,009
| New | +$2.7M |
|
119
PUT
Netflix
NFLX
$286B
| $2.5M | 0.15% |
98,390
+20,660
| +27% | +$245K |
|
120
Elevance Health
ELV
$85.3B
| $2.46M | 0.15% |
17,139
+2,413
| +16% | +$323K |
|
|
TWTR
121
PUT
DELISTED
Twitter, Inc.
TWTR
| $2.36M | 0.14% |
7,312
-1,899
| -21% | -$34.8K |
|
122
T-Mobile US
TMUS
$206B
| $2.36M | 0.14% |
41,044
-8,128
| -17% | -$425K |
|
123
Energy Transfer Partners
ET
$69.7B
| $2.33M | 0.14% |
120,418
-187,259
| -61% | -$3.12M |
|
124
ProShares UltraPro QQQ
TQQQ
$34.7B
| $2.32M | 0.14% |
876,096
+675,408
| +337% | +$1.77M |
|
125
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $2.32M | 0.14% |
62,684
+7,196
| +13% | +$175K |
|
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.